Transcript
LT6013/LT6014 Single/Dual 145µA, 9.5nV/√Hz, AV ≥5, Rail-to-Rail Output Precision Op Amps
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FEATURES ■ ■
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
DESCRIPTIO
35µV Maximum Offset Voltage (LT6013A) Low 1/f Noise: 200nVP-P (0.1Hz to 10Hz) 40nVRMS (0.1Hz to 10Hz) Low White Noise: 9.5nV/√Hz (1kHz) Rail-to-Rail Output Swing 145µA Supply Current per Amplifier 250pA Maximum Input Bias Current (LT6013A) AV ≥5 Stable; Up to 500pF CLOAD 0.2V/µs Slew Rate 1.4MHz Gain Bandwidth Product 120dB Minimum Voltage Gain, VS = ±15V 0.8µV/°C Maximum VOS Drift 2.7V to ±18V Supply Voltage Operation Operating Temperature Range: – 40°C to 85°C Available in SO-8 and Space Saving 3mm × 3mm DFN Packages
The LT®6013 and LT6014 op amps combine low noise and high precision input performance with low power consumption and rail-to-rail output swing. The amplifiers are stable in a gain of 5 or more and feature greatly improved CMRR and PSRR versus frequency compared to other precision op amps.
Thermocouple Amplifiers Precision Photodiode Amplifiers Instrumentation Amplifiers Battery-Powered Precision Systems Low-Voltage Precision Systems Micro-Power Sensor Interface
The amplifiers are fully specified at 5V and ±15V supplies and from –40°C to 85°C. The single LT6013 and dual LT6014 are both available in SO-8 and space saving 3mm × 3mm DFN packages. For unity gain stable versions, refer to the LT6010 and LT6011 data sheets.
U APPLICATIO S ■ ■ ■ ■ ■
The LT6013 and LT6014 operate from any supply voltage from 2.7V to 36V and draw only 145µA of supply current per amplifier on a 5V supply. The output swings to within 40mV of either supply rail, making the amplifiers very useful for low voltage single supply operation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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Input offset voltage is factory-trimmed to less than 35µV. The low drift and excellent long-term stability ensure a high accuracy over temperature and time. The 250pA maximum input bias current and 120dB minimum voltage gain further maintain this precision over operating conditions.
TYPICAL APPLICATIO
Gain of 10 Single Ended to Differential Converter
LT6013/LT6014 0.1Hz to 10Hz Voltage Noise
V+
1/2 LT6014
5 • VIN
– 2k
8.06k 10k
2k
– 1/2 LT6014
INPUT VOLTAGE NOISE (0.1µV/DIV)
+
VIN
VS = 5V, 0V TA = 25°C EQUIVALENT RMS VOLTAGE = 40nVRMS
–5 • VIN
+
0
V–
60134 TA01a
1
2
3
4 5 6 TIME (SEC)
7
8
9
10
60134 TA01b
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LT6013/LT6014
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AXI U
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ABSOLUTE
RATI GS (Note 1)
Total Supply Voltage (V+ to V–) .............................. 40V Differential Input Voltage (Note 2) .......................... 10V Input Voltage .................................................... V+ to V– Input Current (Note 2) ....................................... ±10mA Output Short-Circuit Duration (Note 3) ........... Indefinite Operating Temperature Range (Note 4) .. – 40°C to 85°C Specified Temperature Range (Note 5) ... – 40°C to 85°C
Maximum Junction Temperature DD Package ..................................................... 125°C S8 Package ...................................................... 150°C Storage Temperature Range DD Package ..................................... – 65°C to 125°C S8 Package ...................................... – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C
U U W PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER
TOP VIEW *NC 1
8 *NC
–IN 2
–
7 V+
+IN 3
+
6 OUT
V– 4
5 NC
LT6013CDD LT6013IDD LT6013ACDD LT6013AIDD
ORDER PART NUMBER TOP VIEW *NC 1
TJMAX = 125°C, θJA = 160°C/W UNDERSIDE METAL CONNECTED TO V– (PCB CONNECTION OPTIONAL)
DD PART MARKING*
–
7
V+
+IN 3
+
6
OUT
5
NC
*No Connection
8 V+
OUT A 1
+IN A 3 V
–
4
7 OUT B
A B
6 –IN B 5 +IN B
LT6014CDD LT6014IDD LT6014ACDD LT6014AIDD
TOP VIEW OUT A 1 –IN A 2
TJMAX = 125°C, θJA = 160°C/W UNDERSIDE METAL CONNECTED TO V– (PCB CONNECTION OPTIONAL)
8
V+
7
OUT B
6
–IN B
5
+IN B
A +IN A 3 V–
DD PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN
LT6013CS8 LT6013IS8 LT6013ACS8 LT6013AIS8 S8 PART MARKING 6013 6013I 6013A 6013AI ORDER PART NUMBER
ORDER PART NUMBER
TOP VIEW
–IN A 2
4
S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 190°C/W
LBHC
*No Connection
*NC
–IN 2
V– DD PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN
8
DD PART MARKING* LBCB
B 4
S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 190°C/W
LT6014CS8 LT6014IS8 LT6014ACS8 LT6014AIS8 S8 PART MARKING 6014 6014I 6014A 6014AI
*Temperature and electrical grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges.
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LT6013/LT6014
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 5V, 0V; VCM = 2.5V; RL to 0V; unless otherwise specified. (Note 5) SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
VOS
Input Offset Voltage (Note 8)
LT6013AS8 TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6013S8, LT6014AS8 TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6013ADD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6014S8 TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6013DD, LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
10
35 60 75
µV µV µV
20
60 85 110
µV µV µV
20
60 110 150
µV µV µV
20
75 100 125
µV µV µV
30
85 135 170
µV µV µV
30
125 175 210
µV µV µV
0.2 0.2
0.8 1.4
µV/°C µV/°C
100
250 500 600
pA pA pA
100
500 600 700
pA pA pA
150
800 1000 1200
pA pA pA
100
±250 ±500 ±600
pA pA pA
LT6013S8, LT6013DD, LT6014AS8, LT6014ADD ● TA = 0°C to 70°C ● TA = –40°C to 85°C
100
±400 ±600 ±800
pA pA pA
LT6014S8, LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C
150
±800 ±1000 ±1200
pA pA pA
∆VOS/∆T
Input Offset Voltage Drift (Note 6)
S8 Packages DD Packages
● ●
IOS
Input Offset Current (Note 8)
LT6013AS8, LT6013ADD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6014AS8, LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6013/LT6014 (Standard grades) TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6013AS8, LT6013ADD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
IB
en
Input Bias Current (Note 8)
Input Noise Voltage Density
f = 1kHz, LT6013/LT6014 f = 1kHz, LT6013A/LT6014A
● ●
9.5 9.5
13
UNITS
nV/√Hz nV/√Hz
Input Noise Voltage (Low Frequency) Bandwidth = 0.01Hz to 1Hz
200 50
nVP-P nVRMS
Bandwidth = 0.1Hz to 10Hz
200 40
nVP-P nVRMS
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LT6013/LT6014
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 5V, 0V; VCM = 2.5V; RL to 0V; unless otherwise specified. (Note 5) SYMBOL
PARAMETER
CONDITIONS
in
Input Noise Current Density
f = 1kHz
MIN
TYP
MAX
UNITS
0.15
pA/√Hz
Input Noise Current (Low Frequency) Bandwidth = 0.01Hz to 1Hz
7 1.3
pAP-P pARMS
Bandwidth = 0.1Hz to 10Hz
5 0.4
pAP-P pARMS
Common Mode, VCM = 1V to 3.8V Differential
120 20
GΩ MΩ
4
pF
RIN
Input Resistance
CIN
Input Capacitance
VCM
Input Voltage Range (Positive) Input Voltage Range (Negative)
Guaranteed by CMRR Guaranteed by CMRR
● ●
3.8
CMRR
Common Mode Rejection Ratio
VCM = 1V to 3.8V
●
107
135
Minimum Supply Voltage
Guaranteed by PSRR
●
PSRR
Power Supply Rejection Ratio
VS = 2.7V to 36V, VCM = 1/2VS
●
112
135
dB
AVOL
Large-Signal Voltage Gain
RL = 10k, VOUT = 1V to 4V RL = 2k, VOUT = 1V to 4V
● ●
300 250
2000 2000
V/mV V/mV
Channel Separation
VOUT = 1V to 4V, LT6014
●
110
140
dB
Maximum Output Swing (Positive, Referred to V +)
No Load, 50mV Overdrive
VOUT
4 0.7 2.4
No Load, 50mV Overdrive
Output Short-Circuit Current (Note 3) VOUT = 0V, 1V Overdrive, Source
170 220
mV mV
40
55 65
mV mV
150
225 275
mV mV
8 4
14
●
mA mA
8 4
21
●
mA mA
0.15 0.12 0.1
0.2
● ●
V/µs V/µs V/µs
1 0.9
1.4
●
MHz MHz
VOUT = 5V, –1V Overdrive, Sink SR
GBW
Slew Rate
Gain Bandwidth Product
AV = –10, RF = 50k, RG = 5k TA = 0°C to 70°C TA = –40°C to 85°C
V
120
●
ISC
2.7
mV mV
●
ISINK = 1mA, 50mV Overdrive
dB
55 65
●
Maximum Output Swing (Negative, Referred to 0V)
V V
35 ●
ISOURCE = 1mA, 50mV Overdrive
1
f = 10kHz
ts
Settling Time
AV = –4, 0.01%, VOUT = 1.5V to 3.5V
20
µs
tr, tf
Rise Time, Fall Time
AV = 5, 10% to 90%, 0.1V Step
1
µs
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LT6013/LT6014
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 5V, 0V; VCM = 2.5V; RL to 0V; unless otherwise specified. (Note 5) SYMBOL
PARAMETER
CONDITIONS
∆VOS
Offset Voltage Match (Note 7)
LT6014AS8 TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6014S8 TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6014AS8, LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6014S8, LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
∆IB
Input Bias Current Match (Note 7)
MIN
TYP
MAX
UNITS
50
120 170 220
µV µV µV
50
170 270 340
µV µV µV
50
150 200 250
µV µV µV
60
250 350 420
µV µV µV
200
800 1200 1400
pA pA pA
300
1600 2000 2400
pA pA pA
∆CMRR
Common Mode Rejection Ratio Match (Note 7)
LT6014
●
101
135
dB
∆PSRR
Power Supply Rejection Ratio Match (Note 7)
LT6014
●
106
135
dB
IS
Supply Current
per Amplifier TA = 0°C to 70°C TA = –40°C to 85°C
● ●
145
µA µA µA
165 210 230
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = ±15V, VCM = 0V, RL to 0V, unless otherwise specified. (Note 5) SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage (Note 8)
LT6013AS8 TA = 0°C to 70°C TA = –40°C to 85°C
MIN ● ●
LT6013S8 TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6013ADD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6013DD, LT6014AS8 TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6014S8 TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
TYP
MAX
UNITS
20
60 80 110
µV µV µV
25
85 110 135
µV µV µV
25
85 135 170
µV µV µV
30
135 160 185
µV µV µV
35
150 175 200
µV µV µV
35
160 210 225
µV µV µV
40
200 250 275
µV µV µV 60134fa
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LT6013/LT6014
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = ±15V, VCM = 0V, RL to 0V, unless otherwise specified. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
∆VOS/∆T
Input Offset Voltage Drift (Note 6)
S8 Packages DD Packages
● ●
IOS
Input Offset Current (Note 8)
LT6013AS8, LT6013ADD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6014AS8, LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6013/LT6014 (Standard grades) TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6013AS8, LT6013ADD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6013S8, LT6013DD, LT6014AS8, LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
LT6014S8, LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C
● ●
IB
en
in
Input Bias Current (Note 8)
Input Noise Voltage Density
MIN
f = 1kHz, LT6013/LT6014 f = 1kHz, LT6013A/LT6014A
TYP
MAX
UNITS
0.2 0.2
0.8 1.2
µV/°C µV/°C
100
250 500 600
pA pA pA
100
500 600 700
pA pA pA
150
800 1000 1200
pA pA pA
100
±250 ±500 ±600
pA pA pA
100
±400 ±600 ±800
pA pA pA
150
±800 ±1000 ±1200
pA pA pA
9.5 9.5
13
nV/√Hz nV/√Hz
Input Noise Voltage (Low Frequency) Bandwidth = 0.01Hz to 1Hz
200 50
nVP-P nVRMS
Bandwidth = 0.1Hz to 10Hz
200 40
nVP-P nVRMS
f = 1kHz
0.15
pA/√Hz
Input Noise Current (Low Frequency) Bandwidth = 0.01Hz to 1Hz
7 1.3
pAP-P pARMS
Bandwidth = 0.1Hz to 10Hz
5 0.4
pAP-P pARMS
Common Mode, VCM = ±13.5V Differential
400 20
GΩ MΩ
4
pF
Input Noise Current Density
RIN
Input Resistance
CIN
Input Capacitance
VCM
Input Voltage Range
Guaranteed by CMRR
CMRR
Common Mode Rejection Ratio
VCM = –13.5V to 13.5V
●
±13.5
±14
V
●
115 112
135 135
dB dB
±1.2
±1.35
Minimum Supply Voltage
Guaranteed by PSRR
●
PSRR
Power Supply Rejection Ratio
VS = ±1.35V to ±18V
●
112
135
dB
AVOL
Large-Signal Voltage Gain
RL = 10k, VOUT = –13.5V to 13.5V
2000
●
1000 600
V/mV V/mV
500 300
1500
●
V/mV V/mV
●
120
140
dB
RL = 5k, VOUT = –13.5V to 13.5V Channel Separation
VOUT = –13.5V to 13.5V, LT6014
V
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LT6013/LT6014
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = ±15V, VCM = 0V, RL to 0V, unless otherwise specified. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
VOUT
Maximum Output Swing (Positive, Referred to V +)
No Load, 50mV Overdrive
MIN
TYP
MAX
UNITS
45
80 100
mV mV
140
195 240
mV mV
45
80 100
mV mV
150
250 300
mV mV
●
ISOURCE = 1mA, 50mV Overdrive ●
Maximum Output Swing (Negative, Referred to V –)
No Load, 50mV Overdrive ●
ISINK = 1mA, 50mV Overdrive ●
ISC
Output Short-Circuit Current (Note 3)
VOUT = 0V, 1V Overdrive (Source)
8 5
15
●
mA mA
8 5
20
●
mA mA
0.15 0.12 0.1
0.2
● ●
V/µs V/µs V/µs
1.1 1
1.6
●
MHz MHz µs
VOUT = 0V, –1V Overdrive (Sink) SR
GBW
Slew Rate
Gain Bandwidth Product
AV = –10, RF = 50k, RG = 5k TA = 0°C to 70°C TA = –40°C to 85°C f = 10kHz
ts
Settling Time
AV = –4, 0.01%, VOUT = 0V to 10V
40
tr, tf
Rise Time, Fall Time
AV = 5, 10% to 90%, 0.1V Step
0.9
∆VOS
Offset Voltage Match (Note 7)
LT6014AS8 TA = 0°C to 70°C TA = –40°C to 85°C
50 ● ●
270 320 370
µV µV µV
LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C
50 ● ●
320 420 450
µV µV µV
LT6014S8 TA = 0°C to 70°C TA = –40°C to 85°C
70 ● ●
300 350 400
µV µV µV
LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C
80 ● ●
400 500 550
µV µV µV
LT6014AS8, LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C
200 ● ●
800 1200 1400
pA pA pA
LT6014S8, LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C
300 ● ●
1600 2000 2400
pA pA pA
∆IB
Input Bias Current Match (Note 7)
µs
∆CMRR
Common Mode Rejection Ratio Match (Note 7)
LT6014
●
109
135
dB
∆PSRR
Power Supply Rejection Ratio Match (Note 7)
LT6014
●
106
135
dB
IS
Supply Current
per Amplifier TA = 0°C to 70°C TA = –40°C to 85°C
● ●
200
250 290 310
µA µA µA
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LT6013/LT6014
ELECTRICAL CHARACTERISTICS Note 1: Absolute Maximum Ratings are those beyond which the life of the device may be impaired. Note 2: The inputs are protected by back-to-back diodes and internal series resistors. If the differential input voltage exceeds 10V, the input current must be limited to less than 10mA. Note 3: A heat sink may be required to keep the junction temperature below absolute maximum ratings. Note 4: The LT6013C/LT6014C and LT6013I/LT6014I are guaranteed functional over the operating temperature range of – 40°C to 85°C. Note 5: The LT6013C and LT6014C are guaranteed to meet the specified performance from 0°C to 70°C and are designed, characterized and expected to meet specified performance from – 40°C to 85°C but is not tested or QA sampled at these temperatures. The LT6013I and LT6014I are guaranteed to meet specified performance from –40°C to 85°C.
Note 6: This parameter is not 100% tested. Note 7: Matching parameters are the difference between the two amplifiers. ∆CMRR and ∆PSRR are defined as follows: (1) CMRR and PSRR are measured in µV/V for the individual amplifiers. (2) The difference between matching amplifiers is calculated in µV/V. (3) The result is converted to dB. Note 8: The specifications for VOS, IB, and IOS depend on the grade and on the package. The following table clarifies the notations. STANDARD GRADE
A GRADE
S8 Package
LT6013S8, LT6014S8
LT6013AS8, LT6014AS8
DFN Package
LT6013DD, LT6014DD
LT6013ADD, LT6014ADD
U W
TYPICAL PERFOR A CE CHARACTERISTICS Input Offset Voltage vs Temperature
Distribution of Input Offset Voltage 100
1000
VS = 5V, 0V REPRESENTATIVE UNITS
CHANGE IN OFFSET VOLTAGE (µV)
PERCENT OF UNITS (%)
25
125
LT6013AS8
VS = 5V, 0V TA = 25°C
75
OFFSET VOLTAGE (µV)
30
Offset Voltage vs Input Common Mode Voltage
20 15 10
50 25 0 –25 –50 –75
5
–100
5
15
25
35
45
INPUT OFFSET VOLTAGE (µV)
50 25 0 75 TEMPERATURE (°C)
800
LT6013AS8
600 INPUT BIAS CURRENT (pA)
PERCENT OF UNITS (%)
30
20 15 10 5
100
–175 –125 –75 –25 25 75 125 175 INPUT BIAS CURRENT (pA) 60134 G04
TA = 25°C
500 TA = 85°C
400 300 200
0
125
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 INPUT COMMON MODE VOLTAGE (V) 60134 G03
Input Bias Current vs Input Common Mode Voltage 400
VS = 5V, 0V TYPICAL PART
400 200 0 –200 –400 –600
0
600
Input Bias Current vs Temperature
Distribution of Input Bias Current
25
TA = –40°C
700
60134 G02
60134 G01
35
800
100
–125 –50 –25
CHANGE IN INPUT BIAS CURRENT (pA)
0 –45 –35 –25 –15 –5
VS = 5V, 0V
900
–800 –50
TA = –40°C 200 100 0
0 25 75 50 TEMPERATURE (°C)
100
125
60134 G05
TA = 25°C
–100 TA = 85°C
–200 –300 –400
–25
VS = 5V, 0V
300
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 INPUT COMMON MODE VOLTAGE (V) 60134 G06
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LT6013/LT6014 U W
TYPICAL PERFOR A CE CHARACTERISTICS Total Input Noise vs Source Resistance
en, in vs Frequency
100 1/f CORNER = 2Hz
VOLTAGE NOISE
VS = 5V, 0V TA = 25°C
1
10 100 FREQUENCY (Hz)
1
VS = 5V, 0V TA = 25°C f = 1kHz 1 UNBALANCED SOURCE RESISTORS
0.1 TOTAL NOISE 0.01 RESISTOR NOISE ONLY
0.001
0.0001 100
1000
1k
1
0
10 20 30 40 50 60 70 80 90 100 TIME (SEC)
2
3
4 5 6 TIME (SEC)
7
40 20 V– – 50 – 25
75 50 25 TEMPERATURE (°C)
0
100
125
60134 G11
8
INPUT CURRENT NOISE (2pA/DIV)
60134 G32
1
TA = 85°C TA = 25°C 0.1 TA = –40°C
0.1 1 LOAD CURRENT (mA)
10
Output Saturation Voltage vs Load Current (Output Low)
VS = 5V, 0V
0.01 0.01
9
10 20 30 40 50 60 70 80 90 100 TIME (SEC)
0
10
OUTPUT LOW SATURATION VOLTAGE (V)
OUTPUT LOW
OUTPUT HIGH SATURATION VOLTAGE (V)
OUTPUT VOLTAGE SWING (mV)
1
OUTPUT HIGH
7
VS = 5V, 0V TA = 25°C BALANCED SOURCE RESISTANCE
Output Saturation Voltage vs Load Current (Output High)
–60
4 5 6 TIME (SEC)
60134 G31
Output Voltage Swing vs Temperature
60
9
8
60134 G10
–40
3
0.01Hz to 1Hz Current Noise
VS = 5V, 0V TA = 25°C BALANCED SOURCE RESISTANCE
INPUT CURRENT NOISE (2pA/DIV)
INPUT VOLTAGE NOISE (0.1µV/DIV)
VS = 5V, 0V TA = 25°C
–20
2
60134 G09
0.1Hz to 10Hz Current Noise
VS = 5V, 0V NO LOAD
1
0
60134 G08
0.01Hz to 1Hz Voltage Noise
V+
100M
10k 100k 1M 10M SOURCE RESISTANCE (Ω)
60134 G07
0
VS = 5V, 0V TA = 25°C
INPUT VOLTAGE NOISE (0.1µV/DIV)
10
TOTAL INPUT NOISE (µV/√Hz)
INPUT VOLTAGE NOISE DENSITY (nV/√Hz)
1/f CORNER = 40Hz
INPUT CURRENT NOISE DENSITY (fA/√Hz)
CURRENT NOISE UNBALANCED SOURCE RESISTORS
0.1Hz to 10Hz Voltage Noise
10
1000
10 60134 G12
VS = 5V, 0V
TA = 85°C TA = 25°C 0.1 TA = –40°C
0.01 0.01
0.1 1 LOAD CURRENT (mA)
10 60134 G13
60134fa
9
LT6013/LT6014 U W
TYPICAL PERFOR A CE CHARACTERISTICS Warm-Up Drift
Supply Current vs Supply Voltage PER AMPLIFIER CHANGE IN OFFSET VOLTAGE (µV)
450 SUPPLY CURRENT (µA)
400 350 TA = 85°C
300
TA = 25°C
250 200 150
TA = –40°C
100
THD + Noise vs Frequency 10
3
VS = 5V, 0V VOUT = 2VP-P TA = 25°C AV = 5
1 ±15V
THD + NOISE (%)
500
2
±2.5V
1
0.1
0.01
0.001
50 0
0
2
0
4
30 60 90 120 TIME AFTER POWER-ON (SECONDS)
6 8 10 12 14 16 18 20 SUPPLY VOLTAGE (±V)
THD + Noise vs Frequency
VS = 5V, 0V AV = 5 TA = 25°C
0.1%
LT6014 VS = 5V, 0V TA = 25°C
140
0.01%
2
1
0.001
100k
Channel Separation vs Frequency
CHANNEL SEPARATION (dB)
OUTPUT STEP (V)
THD + NOISE (%)
0.01
1k 10k FREQUENCY (Hz)
160
3
0.1
100
60134 G16
Settling Time vs Output Step 4
VS = ±15V VOUT = 20VP-P TA = 25°C AV = 5
1
0.0001 10
60134 G15
60134 G14
10
150
120 100 80 60 40 20
0.0001 10
0
0 100 1k FREQUENCY (Hz)
0
10k
5
60134 G17
120 100 80 60 40 20 0 100 1k 10k FREQUENCY (Hz)
100k
1M
60134 G21
10
100 1k 10k FREQUENCY (Hz)
VS = 5V, 0V TA = 25°C
120 100 80 60 40 20
100k
1M
60134 G20
PSRR vs Frequency, Split Supplies 140 POWER SUPPLY REJECTION RATIO (dB)
POWER SUPPLY REJECTION RATIO (dB)
COMMON MODE REJECTION RATIO (dB)
140
140
10
1
30
PSRR vs Frequency, Single Supply
TA = 25°C
1
25
60134 G18
CMRR vs Frequency 160
15 10 20 SETTLING TIME (µs)
VS = ±15V TA = 25°C
120 100
POSITIVE SUPPLY
80 60 NEGATIVE SUPPLY
40 20 0
0 0.1
1
10 100 1k 10k 100k FREQUENCY (Hz)
1M
60134 G19
0.1
1
10 100 1k 10k 100k FREQUENCY (Hz)
1M
60134 G22
60134fa
10
LT6013/LT6014 U W
TYPICAL PERFOR A CE CHARACTERISTICS Output Impedance vs Frequency 1000
VS = 5V, 0V TA = 25°C
AV = 10
40 OPEN-LOOP GAIN (dB)
AV = 100 1
80 60 40 20
AV = 5 0.01 1
10
100 1k FREQUENCY (Hz)
10k
100k
–160
GAIN
10 0
–30
–40 0.01 0.1
– 40
1
10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
–200
– 240
1k
10k
100k 1M FREQUENCY (Hz)
60134 G24
–280 10M 60134 G25
Gain vs Frequency, AV = –4 20
VS = 5V, 0V TA = 25°C
VS = 5V, 0V TA = 25°C
16
CL = 500pF
CL = 500pF
14
12 CL = 50pF
GAIN (dB)
GAIN (dB)
PHASE
20
– 20
Gain vs Frequency, AV = 5 18
–120
30
–20
60134 G23
22
–80
–10
0
0.1
VS = 5V, 0V TA = 25°C RL = 10k
50
10
CL = 50pF 8
6
4
2
0
–2 1k
10k 100k FREQUENCY (Hz)
–4
1M
10k 100k FREQUENCY (Hz)
1k
60134 G26
Small-Signal Transient Response
1M 60134 G27
Large-Signal Transient Response
Rail-to-Rail Output Swing 5V
20mV/DIV
5V
1V/DIV
1V/DIV
0V
AV = 5
PHASE SHIFT (DEG)
OPEN-LOOP GAIN (dB)
100
10
60
VS = 5V, 0V TA = 25°C RL = 10k
120
100 OUTPUT IMPEDANCE (Ω)
Gain and Phase vs Frequency
Open-Loop Gain vs Frequency 140
2µs/DIV
60134 G28
AV = –4 VS = 5V, 0V RL = 2k
20µs/DIV
60134 G29
0V
AV = –4 VS = 5V, 0V RL = 2k
100µs/DIV
60134 G30
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11
LT6013/LT6014 U
W
U U
APPLICATIO S I FOR ATIO Not Unity-Gain Stable
3. Find the differential voltage that would appear across the two inputs of the op amp.
The LT6013 and LT6014 amplifiers are optimized for the lowest possible noise and smallest package size, and are intentionally decompensated to be stable in a gain configuration of 5 or greater. Do not connect the amplifiers in a gain less than 5 (such as unity-gain). For a unity-gain stable amplifier with similar performance though slightly higher noise and lower bandwidth, see the LT6010 and LT6011/LT6012 datasheets.
4. The ratio of the output voltage to the input voltage is the gain that the op amp “sees”. This ratio must be 5 or greater. Do not place a capacitor bigger than 200pF between the output to the inverting input unless there is a 5 times larger capacitor from that input to AC ground. Otherwise, the op amp gain would drop to less than 5 at high frequencies, and the stability of the loop would be compromised.
Figure 1 shows simple inverting and non-inverting op amp configurations and indicates how to achieve a gain of 5 or greater. For more general feedback networks, determine the gain that the op amp “sees” as follows:
The LT6013 and LT6014 can be used in lower gain configurations when an impedance is connected between the op amp inputs. Figure 2 shows inverting and noninverting unity gain connections. The RC network across the op amp inputs results in a large enough noise gain at high frequencies, thereby ensuring stability. At low frequencies, the capacitor is an open circuit so the DC precision (offset and noise) remains very good.
1. Suppose the op amp is removed from the circuit. 2. Apply a small-signal voltage at the output node of the op amp.
+
VREF RG VIN
+
VIN
–
+
VIN
– RF
– RF
60134 F01
RG VREF INVERTING: SIGNAL GAIN = –RF/RG OP AMP GAIN = 1 + RF/RG STABLE IF 1 + RF/RG ≥ 5
NONINVERTING: SIGNAL GAIN = 1 + RF/RG OP AMP GAIN = 1 + RF/RG STABLE IF 1 + RF/RG ≥ 5
UNITY-GAIN: DO NOT USE
Figure 1. Use LT6013 and LT6014 in a Gain of 5 or Greater 10k 10k
10k
+
VIN
VOUT
2.5k 1nF
–
–
VIN
VOUT
3k 1nF
+ 60134 F02
UNITY GAIN FOLLOWER
UNITY GAIN INVERTER
Figure 2. Stabilizing Op Amp for Unity Gain Operation 60134fa
12
LT6013/LT6014
U
W
U U
APPLICATIO S I FOR ATIO Preserving Input Precision
Preserving the input accuracy of the LT6013 and LT6014 requires that the applications circuit and PC board layout do not introduce errors comparable to or greater than the 10µV typical offset of the amplifiers. Temperature differentials across the input connections can generate thermocouple voltages of 10’s of microvolts so the connections to the input leads should be short, close together and away from heat dissipating components. Air currents across the board can also generate temperature differentials. The extremely low input bias currents allow high accuracy to be maintained with high impedance sources and feedback resistors. The LT6013 and LT6014 low input bias currents are obtained by a cancellation circuit on-chip. This causes the resulting I B+ and IB– to be uncorrelated, as implied by the IOS specification being comparable to IB. Do not try to balance the input resistances in each input lead; instead keep the resistance at either input as low as possible for maximum accuracy. Leakage currents on the PC board can be higher than the input bias current. For example, 10GΩ of leakage between a 15V supply lead and an input lead will generate 1.5nA! Surround the input leads with a guard ring driven to the same potential as the input common mode to avoid excessive leakage in high impedance applications. Input Protection The LT6013/LT6014 features on-chip back-to-back diodes between the input devices, along with 500Ω resistors in series with either input. This internal protection limits the input current to approximately 10mA (the maximum allowed) for a 10V differential input voltage. Use additional external series resistors to limit the input current to 10mA in applications where differential inputs of more than 10V
are expected. For example, a 1k resistor in series with each input provides protection against 30V differential voltage. Input Common Mode Range The LT6013/LT6014 output is able to swing close to each power supply rail (rail-to-rail out), but the input stage is limited to operating between V – + 1V and V+ – 1.2V. Exceeding this common mode range will cause the gain to drop to zero; however, no phase reversal will occur. Total Input Noise The LT6013 and LT6014 amplifiers contribute negligible noise to the system when driven by sensors (sources) with impedance between 10kΩ and 1MΩ. Throughout this range, total input noise is dominated by the 4kTRS noise of the source. If the source impedance is less than 10kΩ, the input voltage noise of the amplifier starts to contribute with a minimum noise of 9.5nV/√Hz for very low source impedance. If the source impedance is more than 1MΩ, the input current noise of the amplifier, multiplied by this high impedance, starts to contribute and eventually dominate. Total input noise spectral density can be calculated as:
vn(TOTAL) = en2 + 4kTRS + (in RS )2 where en = 9.5nV/√Hz , in = 0.15pA/√Hz and RS is the total impedance at the input, including the source impedance. Capacitive Loads The LT6013 and LT6014 can drive capacitive loads up to 500pF at a gain of 5. The capacitive load driving capability increases as the amplifier is used in higher gain configurations. A small series resistance between the output and the load further increases the amount of capacitance that the amplifier can drive.
60134fa
13
LT6013/LT6014 W W SI PLIFIED SCHE ATIC
(One Amplifier)
V+ R3
R4
R6
R5
Q7 Q18
Q6 Q8
RC1
Q5 Q4
Q3
D1
D2
+IN Q1
Q2
OUT
D4 Q12
D5 Q14
Q17 C B A
–IN
C3 Q20
Q11 Q15
V–
D3
Q22
Q16
R1 500Ω
R2 500Ω
Q13
C2 Q21 B A
Q19
C1
Q9
Q10
60134 SS
60134fa
14
LT6013/LT6014 U
PACKAGE DESCRIPTIO
DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698) R = 0.115 TYP 5
0.38 ± 0.10 8
0.675 ±0.05
3.5 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES)
3.00 ±0.10 (4 SIDES)
1.65 ± 0.10 (2 SIDES)
PIN 1 TOP MARK (NOTE 6)
PACKAGE OUTLINE
(DD8) DFN 1203
0.25 ± 0.05
4 0.25 ± 0.05
0.75 ±0.05
0.200 REF 0.50 BSC 2.38 ±0.05 (2 SIDES)
1 0.50 BSC
0.00 – 0.05
2.38 ±0.10 (2 SIDES) BOTTOM VIEW—EXPOSED PAD
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON TOP AND BOTTOM OF PACKAGE
S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .189 – .197 (4.801 – 5.004) NOTE 3
.045 ±.005 .050 BSC
.245 MIN
8
.160 ±.005
.030 ±.005 TYP
7
6
5
.053 – .069 (1.346 – 1.752)
.150 – .157 (3.810 – 3.988) NOTE 3
.228 – .244 (5.791 – 6.197)
1
2
3
4
RECOMMENDED SOLDER PAD LAYOUT NOTE: 1. DIMENSIONS IN
INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE
.004 – .010 (0.101 – 0.254)
.050 (1.270) BSC
.014 – .019 (0.355 – 0.483) TYP .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254)
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
0°– 8° TYP
.016 – .050 (0.406 – 1.270)
SO8 0303
60134fa
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
15
LT6013/LT6014 U
TYPICAL APPLICATIO
Low Power Hall Sensor Amplifier VS HALL ELEMENT ASAHI-KASEI HW-108A (RANK D) www.asahi-kasei.co.jp
1µF VS 4 LT1790-1.25 1, 2
3
6
400Ω ×4
+ 100k 1%
2
+
– 49.9k
10k OFFSET VS ADJUST
7.87k 1%
1
1/2 LT6014 2
1
8
+
499Ω
0.1µF VOUT
4
3
499Ω
LT1782
49.9k
–
VS = 3V TO 18V IS = ~600µA VOUT = ~40mV/mT
6 26.7k 1%
– 7
1/2 LT6014 5
+
–
4 60134 TA02
Precision Micropower Photodiode Amplifier C1 20pF
R1 100k VS+
IPHOTODIODE
GAIN: AZ = 100kΩ =
VOUT IPHOTODIODE
10% TO 90% RISE TIME: tr = 3.2µs BANDWIDTH: BW = 110kHz
– 880nm IR PHOTODIODE λ OPTO-DIODE CORP ODD-45W
LT6013 CD 170pF
+ –
VS
VOUT VS = ±1.35V TO ±18V C1, CD SATISFY GAIN OF 5 STABILITY REQUIREMENT AT AC OUTPUT OFFSET = 60µV MAX FOR LT6013AS8 60134 TA04
RELATED PARTS PART NUMBER
DESCRIPTION
COMMENTS
LT1112/LT1114
Dual/Quad Low Power, Picoamp Input Precision Op Amps
250pA Input Bias Current
LT1880
Rail-to-Rail Output, Picoamp Input Precision Op Amp
SOT-23
LT1881/LT1882 LT1884/LT1885
Dual/Quad Rail-to-Rail Output, Picoamp Input Precision Op Amps CLOAD Up to 1000pF Dual/Quad Rail-to-Rail Output, Picoamp Input Precision Op Amps 9.5nV/√Hz Input Noise
LT6011/LT6012
Dual/Quad Low Power Rail-to-Rail Output, Precision Op Amps
14nV/√Hz, Unity-Gain Stable Version of LT6014
LT6010
Single Low Power Rail-to-Rail Output, Precision Op Amp
200pA Input Bias Current, Shutdown Feature
60134fa
16
Linear Technology Corporation
LT/TP 0404 1K REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2004
