Transcript
LT1057/LT1058 Dual and Quad, JFET Input Precision High Speed Op Amps
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FEATURES
DESCRIPTIO
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The LT ®1057 is a matched JFET input dual op amp in the industry standard 8-pin configuration, featuring a combination of outstanding high speed and precision specifications. It replaces all the popular bipolar and JFET input dual op amps. In particular, the LT1057 upgrades the performance of systems using the LF412A and OP-215 JFET input duals.
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14V/µs Slew Rate: 10V/µs Min 5MHz Gain-Bandwidth Product Fast Settling Time: 1.3µs to 0.02% 150µV Offset Voltage (LT1057): 450µV Max 180µV Offset Voltage (LT1058): 600µV Max 2µV/°C VOS Drift: 7µV/°C Max 50pA Bias Current at 70°C Low Voltage Noise: 13nV/√Hz at 1kHz 26nV/√Hz at 10Hz
The LT1058 is the lowest offset quad JFET input operational amplifier in the standard 14-pin configuration. It offers significant accuracy improvement over presently available JFET input quad operational amplifiers. The LT1058 can replace four single precision JFET input op amps, while saving board space, power dissipation and cost.
U APPLICATIO S ■ ■ ■ ■ ■ ■
Precision, High Speed Instrumentation Fast, Precision Sample-and-Hold Logarithmic Amplifiers D/A Output Amplifiers Photodiode Amplifiers Voltage-to-Frequency Converters Frequency-to-Voltage Converters
Both the LT1057 and LT1058 are available in the plastic PDIP package and the surface mount SO package. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
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TYPICAL APPLICATIO
Current Output, High Speed, High Input Impedance Instrumentation Amplifier
Distribution of Offset Voltage (All Packages, LT1057 and LT1058) 25
+ 1/4 LT1058
2
1
–
4.7k
9.1k 5
– 1/4 LT1058
V1
12
1/4 LT1058
14
4.7k 7.5k
+
7
+
RX IOUT
+
500Ω*
–
IOUT = 2(V1 – V2) RX
7.5k 6
13
VS = ±15V TA = 25°C
20
7.5k
8
1/4 LT1058
–
PERCENT OF UNITS
V2
3
LT1057: 610 OP AMPS LT1058: 520 OP AMPS 1130 OP AMPS TESTED
15
10
10 5
9 0 –1.0
6.8k 1k**
–0.6 0.6 –0.2 0 0.2 INPUT OFFSET VOLTAGE (mV)
1.0
LT1057/1058 • TA02
*GAIN ADJUST **COMMON MODE REJECTION ADJUST BANDWIDTH ≈ 2MHz LT1057/1058 • TA01
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LT1057/LT1058
W W
W
AXI U
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ABSOLUTE
RATI GS
(Note 1)
Supply Voltage ...................................................... ± 20V Differential Input Voltage ....................................... ± 40V Input Voltage ......................................................... ± 20V Output Short-Circuit Duration .......................... Indefinite Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C
Operating Temperature Range LT1057AM/LT1057M/ LT1058AM/LT1058M (OBSOLETE)...– 55°C to 125°C LT1057AC/LT1057C/LT1057S LT1058AC/LT1058C/LT1058S ................ 0°C to 70°C LT1057I ...................................... –40°C ≤ TA ≤ 85°C
U U W PACKAGE/ORDER I FOR ATIO TOP VIEW 16 NC
OUT A 1
NC 2
15 NC
– IN A 2
OUT A 3
14 V+
+IN A 3
– IN A 4
– A +
+IN A 5
B
V– 6
– +
NC 7
13 OUT B
V+ 4
12 – IN B
+IN B 5
11 +IN B
– IN B 6
10 NC
OUT B 7
NC 8
9
– A +
D
+ –B
C
– +
– +
NC 1
SW PACKAGE 16-LEAD PLASTIC (WIDE) SO
16 OUT D
+IN A 1
8
–IN A
15 – IN D
V– 2
7
OUT A
14 +IN D
+IN B 3
6
V+
13 V–
–IN B 4
5
OUT B
12 +IN C
9
NC
LT1057SW LT1057ISW
LT1058SW LT1058ISW
ORDER PART NUMBER
8 7 OUTPUT B
OUTPUT A 1 A
ORDER PART NUMBER
1057 1057I
TOP VIEW V+
TJMAX =150°C, θJA =90°C/W
ORDER PART NUMBER
S8 PART MARKING
Please note that the LT1057S8/LT1057IS8 standard surface mount pinout differs from that of the LT1057 standard CERDIP/PDIP packages.
SW PACKAGE 16-LEAD PLASTIC (WIDE) SO
TJMAX = 150°C, θJA = 90°C/W
LT1057S8 LT1057IS8
S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 200°C/W
11 –IN C 10 OUT C
NC 8
NC
ORDER PART NUMBER
TOP VIEW
TOP VIEW
–IN A 2
–
LT1057AMH LT1057MH LT1057ACH LT1057CH
B + +
–
6 –IN B 5 +IN B
+IN A 3 4 V – (CASE)
H PACKAGE 8-LEAD METAL CAN
OBSOLETE PACKAGE Consider the N8 or S8 Package for Alternate Source
TOP VIEW 1
–IN A
2
+IN A
3
V+
4
+IN B
5
–IN B
6
OUTPUT B
7
14 OUTPUT D – A +
– 13 –IN D D + 12 +IN D
11 V– + –B
C
– +
OUTPUT A
ORDER PART NUMBER
ORDER PART NUMBER
LT1058ACN LT1058CN
LT1057ACN8 LT1057CN8
–IN C
8
OUTPUT C
N14 PACKAGE 14-LEAD PDIP TJMAX = 110°C, θJA = 130°C/W J14 PACKAGE 14-LEAD CERDIP TJMAX = 150°C, θJA = 100°C/W
OUTPUT 1 –IN A 2 +IN A 3
10 +IN C 9
TOP VIEW
LT1058AMJ LT1058MJ LT1058ACJ LT1058CJ
LT1057ACJ8 LT1057CJ8 LT1057AMJ8 LT1057MJ8
OBSOLETE PACKAGES Consider the N8, S8 or N14 Package for Alternate Source
V– 4
– A + B
– +
8
V+
7
OUTPUT B
6
– IN B
5
+ IN B
N8 PACKAGE 8-LEAD PDIP TJMAX = 100°C, θJA = 130°C/W
J8 PACKAGE 8-LEAD CERDIP TJMAX = 150°C, θJA = 100°C/W
Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges.
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LT1057/LT1058
ELECTRICAL CHARACTERISTICS
VS = ± 15V, TA = 25°C, VCM = 0V unless otherwise noted. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
LT1057 LT1057 (S8 Package) LT1058
LT1057AM/LT1058AM LT1057AC/LT1058AC MIN TYP MAX
LT1057M/LT1058M LT1057C/LT1058C MIN TYP MAX
150
450
180
600
200 220 250
800 1200 1000
µV µV µV
UNITS
lOS
Input Offset Current
Fully Warmed Up
3
40
4
50
pA
lB
Input Bias Current
Fully Warmed Up
±5
± 50
±7
± 75
pA
Input Resistance
Differential Common Mode VCM = – 11V to 8V Common Mode VCM = 8V to 11V
1012 1012 1011
1012 1012 1011
Ω Ω Ω
4
4
pF
2.0 2.4
2.1 2.5
Input Capacitance Input Noise Voltage
0.1Hz to 10Hz,
en
Input Noise Voltage Density
fO = 10Hz fO = 1kHz (Note 3)
26 13
22
28 14
24
nV/√Hz nV/√Hz
1.5
4
1.8
6
fA/√Hz
in
Input Noise Current Density
fO = 10Hz, 1kHz (Note 4)
AVOL
Large-Signal Voltage Gain
VO = ±10V, RL = 2k VO = ±10V, RL = 1k
LT1057 LT1058
µVP-P µVP-P
en
Input Voltage Range
350 250
100 80
300 220
V/mV V/mV
±10.5
14.3 – 11.5
±10.5
14.3 – 11.5
V V
86 84
100 98
82 80
98 96
dB dB
CMRR
Common Mode Rejection Ratio
PSRR
Power Supply Rejection Ratio
VS = ±10V to ±18V
88
103
86
102
dB
VOUT
Output Voltage Swing
RL = 2k
±12
±13
±12
±13
V
SR
Slew Rate
10
14
8
13
V/µs
GBW
Gain-Bandwidth Product
3.5
5
3
5
MHz
IS
Supply Current Per Amplifier Channel Separation
LT1057 LT1058
150 120
f = 1MHz (Note 6)
1.6 DC to 5kHz, VIN = ±10V
2.5
1.7
132
2.8
130
mA dB
(LT1057/LT1058 SW Package Only), VS = ± 15V, TA = 25°C, VCM = 0V unless otherwise noted. SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
LT1057 LT1058
lOS
Input Offset Current
lB
Input Bias Current Input Resistance –Differential –Common-Mode
MIN
TYP
MAX
UNITS
0.3 0.35
2 2.5
mV
Fully Warmed Up
5
50
pA
Fully Warmed Up
±10
±100
pA
0.4 0.4 0.05
TΩ
VCM = – 11V to 8V VCM = 8V to 11V
4
pF
Input Capacitance en
Input Noise Voltage
0.1Hz to 10Hz
en
Input Noise Voltage Density
fO = 10Hz fO = 1kHz
LT1057 LT1058
2.1 2.5 26 13
µVP-P nV/√Hz 10578fb
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LT1057/LT1058
ELECTRICAL CHARACTERISTICS (LT1057/LT1058 SW Package Only), VS = ± 15V, TA = 25°C, VCM = 0V unless otherwise noted. SYMBOL
PARAMETER
CONDITIONS
in
Input Noise Current Density
fO = 10Hz, 1kHz
AVOL
Large-Signal Voltage Gain
VO = ±10V
MIN
RL = 2k RL = 1k
Input Voltage Range
TYP
MAX
UNITS
1.8
fA/√Hz
100 50
300 220
V/mV
±10.5
14.3 – 11.5
V
82 80
98 98
dB
CMRR
Common-Mode Rejection Ratio
VCM = ±15V
PSRR
Power Supply Rejection Ratio
VS = ±10V to ±18V
86
102
dB
VOUT
Output Voltage Swing
RL = 2k
±12
±13
V
SR
Slew Rate
8
13
V/µs
GBW
Gain-Bandwidth Product
3
5
MHz
IS
Supply Current Per Amplifier Channel Seperation
LT1057 LT1058
f = 1MHz (Note 6)
1.7 DC to 5kHz, VIN =±10V
2.8
mA
130
dB
The ● denotes the specifications which apply over the temperature range of 0°C ≤ TA ≤ 70°C or -40°C ≤ TA ≤ 85°C (LT1057IS8), otherwise specifications are TA = 25°C. VS = ±15V, VCM = 0V, unless noted.
MAX
MAX
UNITS
330 500 400 400
1400 2300 1900 1800
µV µV µV µV
2.3 4 4 4.5 3 5
12 16 16 16 15 22
µV/°C µV/°C µV/°C µV/°C µV/°C µV/°C
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
LT1057 LT1057IS8 LT1057S8 LT1058
● ● ● ●
250
800
300
1200
LT1057 H/J8 Package N8 Package LT1057S8 (Note 5) LT1057IS8 (Note 5) LT1058 J Package (Note 5) N Package (Note 5)
● ● ● ● ● ●
1.8 3
7 10
2.5 4
10 15
Warmed Up, TA = 70°C LT1057IS8
18
150
20 35
250 600
pA
●
Warmed Up, TA = 70°C LT1057IS8
± 50
± 250
± 60 ± 100
± 350 ± 900
pA
●
IOS IB
lnput Offset Current Input Bias Current
MIN
LT1057C LT1058C TYP
SYMBOL
Average Temperature Coefficient of Input (Offset Voltage)
MIN
LT1057AC LT1058AC TYP
AVOL
Large-Signal Voltage Gain
VO = ± 10V, RL = 2k
●
70
220
50
200
V/mV
CMRR
Common Mode Rejection Ratio
VCM = ± 10.4V
●
85
98
80
96
dB
PSRR VOUT
Power Supply Rejection Ratio Output Voltage Swing
VS = ± 10V to ± 18V RL = 2k
●
87 ±12
102 ±12.8
84 ±12
100 ±12.8
dB V
IS
Supply Current Per Amplifier
● ●
TA = 70°C
2.8 1.4
3.2 1.5
mA mA
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LT1057/LT1058
ELECTRICAL CHARACTERISTICS (LT1057/LT1058 SW Package Only.) The ● denotes specifications which apply over the temperature range of VS = ± 15V, VCM = 0V, 0°C ≤ TA ≤ 70°C (LT1057SW, LT1058SW) or –40°C ≤ TA ≤ 85°C (LT1057ISW, LT1058ISW), unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
LT1057 LT1058S LT1058IS
MIN
Average Temperature Coefficient of Input Offset Voltage
TYP
MAX
UNITS
● ● ●
0.5 0.6 0.7
2.5 3.0 4.0
mV
●
5
µV/°C
lOS
Input Offset Current
Warmed Up, TA = 70°C Warmed Up, TA = 85°C
20 35
250 400
pA
lB
Input Bias Current
Warmed Up, TA = 70°C Warmed Up, TA = 85°C
± 60 ± 100
± 400 ± 700
pA
AVOL
Large Signal Volage Gain
VO = ± 10V, RL = 2k
LT1057 LT1058
● ●
50 40
200 200
mV
CMRR
Common-Mode Rejection Ratio
VCM = ± 10.5V
LT1057 LT1058
● ●
80 78
96 96
dB
PSRR
Power Supply Rejection Ratio
VS = ± 10V to ± 18V
LT1057 LT1058
● ●
Output Voltage Swing
RL = 2k
100 100 ± 12.8
dB
VOUT
84 82 ± 12
●
V
The ● denotes specifications which apply over the temperature range of – 55°C ≤ TA ≤ 125°C, VS = ±15V, VCM = 0V, unless otherwise noted.
MAX
MAX
UNITS µV µV
PARAMETER
CONDITIONS
VOS
lnput Offset Voltage
LT1057 LT1058
● ●
300 380
1100 1600
400 550
2000 2500
Average Temperature Coefficient of Input Offset Voltage
LT1057 LT1058 (Note 5)
● ●
2.0 2.5
7 10
2.5 3
12 15
µV/°C µV/°C
IOS
lnput Offset Current
Warmed Up, TA = 125°C
0.15
2
0.2
3
nA
IB
Input Bias Current
Warmed Up, TA = 125°C
± 0.6
± 4.5
± 0.7
±6
nA
AVOL
Large-Signal Voltage Gain
VO = ± 10V, RL = 2k
●
40
120
30
110
V/mV
CMRR
Common Mode Rejection Ratio
VCM = ± 10.4V
●
84
97
80
95
dB
PSRR
Power Supply Rejection Ratio
VS = ± 10V to ± 17V
●
86
100
83
98
dB
VOUT
Output Voltage Swing
RL = 2k
●
± 12
± 12.7
± 12
± 12.6
V
IS
Supply Current Per Amplifier
TA = 125°C
1.25
1.9
MIN
LT1057M LT1058M TYP
SYMBOL
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: Typical parameters are defined as the 60% yield of distributions of individual amplifiers; (i.e., out of 100 LT1058s or, 100 LT1057s, typically 240 op amps, or 120 for the LT1057, will be better than the indicated specification). Note 3: This parameter is tested on a sample basis only.
MIN
LT1057AM LT1058AM TYP
1.3
2.2
mA
Note 4: Current noise is calculated from the formula: in = (2qlb)1/2 where q = 1.6 • 10– 19 coulomb. The noise of source resistors up to1G swamps the contribution of current noise. Note 5: This parameter is not 100% tested. Note 6: Gain-bandwidth product is not tested. It is guaranteed by design and by inference from the slew rate measurement.
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LT1057/LT1058 U W
TYPICAL PERFOR A CE CHARACTERISTICS
VS = ±15V VCM = 0V WARMED UP
300
100 BIAS CURRENT 30 OFFSET CURRENT
10
25 75 100 50 AMBIENT TEMPERATURE (°C)
0
125
VS = ±15V
1.4
140
1.2
120
1.0
100 TA = 125°C
0.8
60
0.4
40 20
0.2 TA = 25°C
0
0 –5 –10 10 5 COMMON MODE INPUT VOLTAGE (V)
120
LT1057J: 130 OP AMPS LT1058J: 136 OP AMPS 368 OP AMPS
VS = ±15V
100 NUMBER OF UNITS
80
70
60 40
32
80 70 60
60 40
16 2
4 5
22
20 4
1 UNIT EACH AT –19, –16, –13 14, 16µV/°C
31
4
2 1
0 3 6 –12 –9 –6 –3 9 0 12 OFFSET VOLTAGE DRIFT WITH TEMPERATURE (µV/°C)
LT1057 H PACKAGE
20
0
1 3 4 2 TIME AFTER POWER ON (MINUTES)
5
LT1057/1058 • TPC03
Long-Term Drift of Representative Units VS = ±15V TA = 25°C
30 20 10 0 –10 –20 –30 –40 –50
0
1
3 2 TIME (MONTHS)
4
5
LT1057/1058 • TPC06
Voltage Gain vs Temperature 1000 RL = 2k VOLTAGE GAIN (V/mV)
NOISE VOLTAGE (1µV/DIV)
20
LT1057 N, LT1058 J PACKAGE
LT1057 J PACKAGE
3
VS = ±15V TA = 25°C
30
40
0.1Hz to 10Hz Noise
VS = ±15V TA = 25°C
50
LT1058 N PACKAGE
LT1057/1058 • TPC05
Voltage Noise vs Frequency 70
5
60
0
0 3 6 9 –12 –9 – 6 – 3 0 12 OFFSET VOLTAGE DRIFT WITH TEMPERATURE (µV/°C)
LT1057/1058 • TPC04
1000
27 11
9
80
40
44
24 20
65
VS = ± 15V TA = 25°C
50
LT1057N: 180 OP AMPS LT1058N: 176 OP AMPS 356 OP AMPS
96
100
15
Distribution of Offset Voltage Drift with Temperature (Plastic N Package)
112 LT1057H: 102 OP AMPS
0 –20
– 0.2 –15
Distribution of Offset Voltage Drift with Temperature (H and J Package) VS = ±15V
80
0.6
LT1057/1058 • TPC02
100
NUMBER OF UNITS
TA = 70°C
LT1057/1058 • TPC01
120
RMS VOLTAGE NOISE DENSITY (nV/√Hz)
Warm-Up Drift 160
OFFSET VOLTAGE CHANGE (µV)
3
INPUT BIAS CURRENT, TA = 125°C (nA)
INPUT BIAS AND OFFSET CURRENT (pA)
1.6
INPUT BIAS CURRENT, TA = 25°C TO 70°C (pA)
1000
Input Bias Current Over the Common-Mode Range
CHANGE IN OFFSET VOLTAGE (µV)
Input Bias and Offset Currents vs Temperature
VS = ±15V V0 = ±10V
300 RL = 1k 100
30
1/f CORNER = 28Hz 10 3
10
30
100 300 1000 3000 10000 FREQUENCY (Hz) LT1057/1058 • TPC07
0
2
6 4 TIME (SECONDS)
8
10
LT1057/1058 • TPC08
10 –75
25 –25 75 TEMPERATURE (°C)
125
LT1057/1058 • TPC09
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LT1057/LT1058 U W
TYPICAL PERFOR A CE CHARACTERISTICS Slew Rate, Gain-Bandwidth Product vs Temperature 30
Undistorted Output Swing vs Frequency 10
VS = ±15V
SLEW RATE (V/µs)
5V/DIV AV = +1 CL = 100pF
SLEW FALL 20
6 GBW
4
SLEW RISE 10
2
0.5µs/DIV 0 –50 –25
50 25 75 0 TEMPERATURE (°C)
100
GAIN BANDWIDTH PRODUCT (MHz)
8
30 PEAK-TO-PEAK OUTPUT SWING (V)
Large-Signal Response
VS = ±15V TA = 25°C
24
18
12
6
0 100k
125
1M FREQUENCY (Hz)
LT1057/1058 • TPC11
LT1057/1058 • TPC10
Small-Signal Response
Gain, Phase Shift vs Frequency 140
Capacitive Load Handling 80
100
60
140 GAIN
PHASE
20
160
VS = ±15V 0 TA = 25°C CL = 10pF –20 1 10 100
0.2µs/DIV
60
OVERSHOOT (%)
GAIN (dB)
20mV/DIV
80
PHASE SHIFT (DEGREES)
120
PHASE MARGIN = 58°
40
AV = +1 CL = 100pF
VS = ±15V TA = 25°C
70
120 100
50 AV = –1 40 AV = +1 30 20
AV = 10
10 0
180 1k 10k 100k 1M 10M 100M FREQUENCY (Hz)
10
100 1000 CAPACITIVE LOAD (pF)
Settling Time
Channel Separation vs Frequency
FROM LEFT TO RIGHT: SETTLING TIME TO 10mV, 5mV, 2mV, 1mV, 0.5mV
0
0.5mV –5 10mV VS = ±15V TA = 25°C 0
1
2
140
SETTLING TIME (µs) LT1057/1058 • TPC14
LIMITED BY THERMAL INTERACTION AT DC = 132dB
120
RS = 10Ω
RS = 1k LIMITED BY PIN-TO-PIN CAPACITANCE
100
VS = ±15V TA = 25°C VIN = 20VP-P TO 5kHz RL = 2k
80
60 3
100
OUTPUT IMPEDANCE (Ω)
0.5mV
CHANNEL SEPARATION (dB)
OUTPUT VOLTAGE SWING FROM 0V (V)
10mV
–10
Output Impedance vs Frequency
160
5
1
10
100 1k 10k FREQUENCY (Hz)
10000
LT1057/1058 • TPC13
LT1057/1058 • TPC12
10
10M
VS = ±15V TA = 25°C
AV = 100
10 AV = 10
1 AV = 1
100k
1M
LT1057/1058 • TPC15
0.1 1k
10k 100k FREQUENCY (Hz)
10M LT1057/1058 • TPC16
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LT1057/LT1058 U W
TYPICAL PERFOR A CE CHARACTERISTICS Common Mode Rejection Ratio vs Frequency 15
VS = ±15V TA = 25°C
80 CMRR (dB)
120
VS = ±10V TO ±17V FOR PSRR VS = ±15V, VCM = ±10.5V FOR CMRR
14 COMMON MODE RANGE (V)
100
Common Mode and Power Supply Rejections vs Temperature
60 40 20
13 12
CMRR, PSRR (dB)
120
Common Mode Range vs Temperature
11 ±10 –11 –12
110 PSRR
CMRR 100
–13 –14
0
10
100
1k 10k 100k FREQUENCY (Hz)
1M
VS = ±15V –15 50 –50 0 TEMPERATURE (°C)
10M
LT1057/1058 • TPC17
LT1057/1058 • TPC19
Supply Current vs Temperature
140
Short-Circuit Current vs Time (One Output Shorted to Ground) 50
3
120 100 POSITIVE SUPPLY
80 NEGATIVE SUPPLY
60 40 20 0 10
100
100k 10k 1k FREQUENCY (Hz)
1M
10M
40 SHORT-CIRCUIT CURRENT (mA)
SUPPLY CURRENT PER AMPLIFIER (mA)
TA = 25°C
2 VS = ±15V VS = ±10V 1
VS = ±15V TA = –55°C
30 20
TA = 25°C
10
TA = 125°C
0 TA = 125°C
–10
TA = 25°C
–20 –30
TA = –55°C
–40 0 –50 –25
125
25 75 TEMPERATURE (°C)
–25
LT1057/1058 • TPC18
Power Supply Rejection Ratio vs Frequency POWER SUPPLY REJECTION RATIO (dB)
90
100
–50 50 25 75 0 TEMPERATURE (°C)
LT1057/1058 • TPC20
100
2 1 0 3 TIME FROM OUTPUT SHORT TO GROUND (MINUTES)
125
LT1057/1058 • TPC22
LT1057/1058 • TPC21
U
W
U U
APPLICATIO S I FOR ATIO
The LT1057 may be inserted directly in LF353, LF412, LF442, TL072, TL082 and OP-215 sockets. The LT1058 plugs into LF347, LF444, TL074 and TL084 sockets. Of course, all standard dual and quad bipolar op amps can also be replaced by these devices.
with RS and RF in the kilohm range, this pole can create excess phase shift and even oscillation. A small capacitor (CF) in parallel with RF eliminates this problem. With RS(CS + CIN) = RFCF, the effect of the feedback pole is completely removed. CF
High Speed Operation When the feedback around the op amp is resistive (RF) a pole will be created with RF, the source resistance and capacitance (RS, CS), and the amplifier input capacitance (CIN ≈ 4pF). In low closed loop gain configurations and
RF
– CIN RS
CS
OUTPUT
+ LT1057/LT1058 • AI01
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8
LT1057/LT1058 U
W
U U
APPLICATIO S I FOR ATIO
Settling time is measured in a test circuit which can be found in the LT1055/LT1056 data sheet and in Application Note 10. Achieving Picoampere/Microvolt Performance In order to realize the picoampere/microvolt level accuracy of the LT1057/LT1058, proper care must be exercised. For example, leakage currents in circuitry external to the op amp can significantly degrade performance. High quality insulation should be used (e.g., TeflonTM, Kel-F); cleaning of all insulating surfaces to remove fluxes and other residues will probably be required. Surface coating may be necessary to provide a moisture barrier in high humidity environments. Board leakage can be minimized by encircling the input circuitry with a guard ring operated at a potential close to that of the inputs; in inverting configurations, the guard ring should be tied to ground, in noninverting connections, to the inverting input. Guarding both sides of the printed circuit board is required. Bulk leakage reduction depends on the guard ring width. The LT1057/LT1058 have the lowest offset voltage of any dual and quad JFET input op amps available today. However, the offset voltage and its drift with time and temperature are still not as good as on the best bipolar amplifiers (because the transconductance of FETs is considerably lower than that of bipolar transistors). Conversely, this lower transconductance is the main cause of the significantly faster speed performance of FET input op amps.
Offset voltage also changes somewhat with temperature cycling. The AM grades show a typical 40µV hysteresis (50µV on the M grades) when cycled over the – 55°C to 125°C temperature range. Temperature cycling from 0°C to 70°C has a negligible (less than 20µV) hysteresis effect. The offset voltage and drift performance are also affected by packaging. In the plastic N package, the molding compound is in direct contact with the chip, exerting pressure on the surface. While NPN input transistors are largely unaffected by this pressure, JFET device drift is degraded. Consequently for best drift performance, as shown in the Typical Performance Characteristics distribution plots, the J or H packages are recommended. In applications where speed and picoampere bias currents are not necessary, Linear Technology offers the bipolar input, pin compatible LT1013 and LT1014 dual and quad op amps. These devices have significantly better DC specifications than any JFET input device. Phase Reversal Protection Most industry standard JFET input single, dual and quad op amps (e.g., LF156, LF351, LF353, LF411, LF412, OP-15, OP-16, OP-215, TL084) exhibit phase reversal at the output when the negative common mode limit at the input is exceeded (i.e., below – 12V with ± 15V supplies). The photos below show a ± 16V sine wave input (A), the response of an LF412A in the unity gain follower mode (B), and the response of the LT1057/LT1058 (C). The phase reversal of photo (B) can cause lock-up in servo systems. The LT1057/LT1058 does not phase-reverse due to a unique phase reversal protection circuit.
Teflon is a trademark of DuPont.
(A) ± 16V Sine Wave Input
(B) LF412A Output
(C) LT1057/LT1058 Output
All Photos 5V/Div Vertical Scale, 50µs/Div Horizontal Scale 10578fb
9
LT1057/LT1058
U
TYPICAL APPLICATIO S Low Noise, Wideband, Gain = 100 Amplifier with High Input Impedance 4.3k 470Ω
–
2.4k
1/4 LT1058
7.5k 500Ω
+ 4.3k
2.4k
– 470Ω
1/4 LT1058
–
OUTPUT
+
1/4 LT1058
+
INPUT
4.3k
470Ω
2.4k
–3dB BANDWIDTH = 350kHZ GAIN-BANDWIDTH PRODUCT = 35MHz WIDEBAND NOISE = 13nV/√Hz = 7.5nV/√Hz REFERRED TO INPUT √3 RMS NOISE DC TO FULL BANDWIDTH = 7µV
– 1/4 LT1058
+
LT1057/1058 • A01
Wideband, High Input Impedance, Gain = 1000 Amplifier 1k
4.7k 1k
–
–
1/4 LT1058 INPUT
4.7k
1/4 LT1058
+ 1/4 LT1058
+
+ 1/4 LT1058
+
–
OUTPUT
– 4.7k
4.7k 1k
1k
100Ω –3dB BANDWIDTH = 400kHz GAIN-BANDWIDTH PRODUCT = 400MHz WIDEBAND NOISE = 13nV/√Hz REFERRED TO INPUT LT1057/1058 • A02
Low Distortion, Crystal Stabilized Oscillator 130Ω
CRYSTAL 20kHz NT CUT
COMMON MODE SUPPRESSION
– 1/2 LT1057
100k
–
0.01µF
100Ω
15pF
+ #327 LAMP
1VRMS OUT 20kHz 0.005% DISTORTION
OSCILLATOR
1/2 LT1057
+ LT1057/1058 • A03
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10
LT1057/LT1058
U
TYPICAL APPLICATIO S Fast, Precision Bridge Amplifier
330pF
–
10k
1/2 LT1057
+ 10k
1k
330pF
–
RLOAD
1/2 LT1057
LT1010
LT1010
+
INPUT
SLEW RATE = 14V/µs OUTPUT CURRENT TO LOAD = 150mA LOAD CAPACITANCE: UP TO 1µF LT1057/1058 • A04
Analog Divider 80.6k*
20k
1µF
LTC1043 7
–5V
6 LT1004 1.2V
12
5V
LTC1043
1k 8
+
B INPUT
5
1µF
– 1/2 LT1057
OUTPUT = A B
+
2
– 5V 0.001 POLYSTYRENE 11
13 1µF
75k*
14 16
–
A INPUT
1/2 LT1057
+ 30pF
22k
330k
2N2907 1µF * 1% FILM
–5V LT1057/1058 • A05
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11
LT1057/LT1058
U
TYPICAL APPLICATIO S Bipolar Input (AC) V/F Converter LTC1043
1k –5V
6 LT1004 2.5V
2
5
0.1µF
16 18
1M*
15
3
1M*
0.01 POLYSTYRENE
1/4 LT1058 1µF
INPUT ±1V
+ –
2N3906
+
5V
36.5k*
– 10k
DATA OUTPUT 0kHz TO 1kHz
1/4 LT1058
– 1M*
1/4 LT1058
1M*
10k
+
22k
150pF
10k
–5V 0.1µF
–
1/4 LT1058
*1% FILM MATCH 1M RESISTORS TO 0.05%
SIGN BIT
+ LT1057/1058 • A06
12-Bit A/D Converter 10k 0.001µF
–
CLOCK
1/4 LT1058
14
– 100k*
2
1/4 LT1058
+
1
10k
4 3
74C74 5
10k 2k
5V
0.01µF EIN
+
FLIP-FLOP 15V
INTEGRATOR
BOUT
6
10k
7
– 5V
+ 180pF
6.8k
1/4 LT1058
68pF 10k
–
15V 10k 2N3906
–15V 4
10k
OUTPUT GATE
16 LTC1043 CURRENT SWITCH
15
820Ω 18
17
LEVEL SHIFT
–15V
3
1k
+ –15V
AOUT
1/4 LT1058
2N4393
– A DATA OUTPUT = OUT BOUT *VISHAY S-102 RESISTOR
OUT LT1021 IN 10V
NC
GND 95k*
10k –15V
LT1057/1058 • A07
10578fb
12
LT1057/LT1058
U
TYPICAL APPLICATIO S Instrumentation Amplifier with Shield Driver 3
2
+
10k
1k
1
1/4 LT1058
–
RF 9.1k
GUARD
RG 1k
+
+
1/4 LT1058
8
INPUT
–
–
15V 5
10
9
1/4 LT1058
6
RG 1k
4
+ –
7
OUTPUT
11 –15V
GUARD
13
12
RF 9.1k
– 1/4 LT1058
GAIN = 10(1+RF/RG) ≈ 100 IB = 5pA RIN = 1012Ω BW = 350kHz
10k
14 1k
+
LT1057/1058 • A08
100dB Range Logarithmic Photodiode Amplifier 6 Q4
4 10
5
2k
11
1M
Q5
1M FULL-SCALE 750k* TRIM
12
50k DARK TRIM
50k*
500pF
– IP
1/2 LT1057 0.01µF
+
– 1/2 LT1057
0.033µF
EOUT
+
LT1021-10V 10k*
–
15V IN
OUT
1
3k
2
LM301A
10k*
3 Q2
+ 2k
33Ω 15 14
Q1
7 Q3
13
9 15V
= HP-5082-4204 PIN PHOTODIODE. Q1–Q5 = CA3096. CONNECT SUBSTRATE OF CA3096 ARRAY TO Q4’s EMITTER. *1% RESISTOR 100dB RANGE LOGARITHMIC PHOTODIODE AMPLIFIER
8
LIGHT (900µM)
RESPONSE DATA DIODE CURRENT
CIRCUIT OUTPUT
1MW 100µW 10µW 1µW 100nW 10nW
350µA 35µA 3.5µA 350nA 35nA 3.5nA
10.0V 7.85V 5.70V 3.55V 1.40V –0.75V
LT1057/1058 • A09
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13
LT1057/LT1058 U
PACKAGE DESCRIPTIO
H Package 8-Lead TO-5 Metal Can (.200 Inch PCD) (Reference LTC DWG # 05-08-1320) .335 – .370 (8.509 – 9.398) DIA .305 – .335 (7.747 – 8.509)
.027 – .045 (0.686 – 1.143) PIN 1
45°TYP
.040 (1.016) MAX
.028 – .034 (0.711 – 0.864) .200 (5.080) TYP
.050 (1.270) MAX
SEATING PLANE
.165 – .185 (4.191 – 4.699) GAUGE PLANE
.010 – .045* (0.254 – 1.143)
.110 – .160 (2.794 – 4.064) INSULATING STANDOFF
REFERENCE PLANE .500 – .750 (12.700 – 19.050)
.016 – .021** (0.406 – 0.533)
*LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE AND THE SEATING PLANE .016 – .024 **FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS (0.406 – 0.610) H8(TO-5) 0.200 PCD 0801
J8 Package 8-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110)
.300 BSC (7.62 BSC)
.008 – .018 (0.203 – 0.457)
.200 (5.080) MAX
CORNER LEADS OPTION (4 PLCS)
0° – 15°
.015 – .060 (0.381 – 1.524)
.023 – .045 (0.584 – 1.143) HALF LEAD OPTION .045 – .068 (1.143 – 1.650) FULL LEAD OPTION
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS
.405 (10.287) MAX
.005 (0.127) MIN
8
.014 – .026 (0.360 – 0.660)
5
.025 (0.635) RAD TYP
.220 – .310 (5.588 – 7.874)
1 .045 – .065 (1.143 – 1.651)
6
7
2
3
4
.125 3.175 MIN
.100 (2.54) BSC
J8 0801
J Package 14-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) .200 (5.080) MAX
.300 BSC (7.62 BSC)
.015 – .060 (0.381 – 1.524)
.008 – .018 (0.203 – 0.457)
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS
.005 (0.127) MIN
.785 (19.939) MAX 14
13
12
11
10
9
8
0° – 15°
.045 – .065 (1.143 – 1.651) .014 – .026 (0.360 – 0.660)
.100 (2.54) BSC
.025 (0.635) .125 RAD TYP (3.175) MIN
.220 – .310 (5.588 – 7.874)
1
2
3
4
5
6
7
J14 0801
OBSOLETE PACKAGES 10578fb
14
LT1057/LT1058
U
PACKAGE DESCRIPTIO
N8 Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) .300 – .325 (7.620 – 8.255)
8 .008 – .015 (0.203 – 0.381)
(
+.035 .325 –.015 +0.889 8.255 –0.381
7
6
5
.065 (1.651) TYP
.255 ± .015* (6.477 ± 0.381)
)
1
2
.130 ± .005 (3.302 ± 0.127)
.045 – .065 (1.143 – 1.651)
.400* (10.160) MAX
.100 (2.54) BSC
4
3
.120 (3.048) .020 MIN (0.508) MIN .018 ± .003
NOTE: 1. DIMENSIONS ARE
(0.457 ± 0.076)
N8 1002
INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
N Package 14-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) .770* (19.558) MAX
.300 – .325 (7.620 – 8.255) 14
.008 – .015 (0.203 – 0.381)
(
+.035 .325 –.015
+0.889 8.255 –0.381
13
12
11
.130 ± .005 (3.302 ± 0.127) 10
9
8
.020 (0.508) MIN
.255 ± .015* (6.477 ± 0.381)
)
1
3
2
5
4
6
.045 – .065 (1.143 – 1.651)
.065 (1.651) TYP .005 (0.125) .100 MIN (2.54) BSC
.120 (3.048) MIN
7
NOTE: 1. DIMENSIONS ARE
.018 ± .003 (0.457 ± 0.076)
INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
N14 1002
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 8
7
6
5
N N
.245 MIN
.160 ±.005
.150 – .157 (3.810 – 3.988) NOTE 3
.228 – .244 (5.791 – 6.197)
1
2
3
N/2
.053 – .069 (1.346 – 1.752)
.004 – .010 (0.101 – 0.254)
.008 – .010 (0.203 – 0.254)
N/2
.030 ±.005 TYP
RECOMMENDED SOLDER PAD LAYOUT 1 NOTE: INCHES 1. DIMENSIONS IN (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
2
3
4
.014 – .019 (0.355 – 0.483) TYP
.010 – .020 × 45° (0.254 – 0.508) 0°– 8° TYP
.016 – .050 (0.406 – 1.270) .050 (1.270) BSC
SO8 0502
10578fb
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
LT1057/LT1058
U
PACKAGE DESCRIPTIO
SW Package 16-Lead Plastic Small Outline (Wide .300 Inch) (Reference LTC DWG # 05-08-1620) .050 BSC .045 ±.005
.030 ±.005 TYP
.398 – .413 (10.109 – 10.490) NOTE 4 16
N
15
14
13
12
11 10
9
N .325 ±.005
.420 MIN
.394 – .419 (10.007 – 10.643)
NOTE 3
1
2
3
N/2
N/2
RECOMMENDED SOLDER PAD LAYOUT
1
.005 (0.127) RAD MIN
.009 – .013 (0.229 – 0.330)
.291 – .299 (7.391 – 7.595) NOTE 4 .010 – .029 × 45° (0.254 – 0.737)
2
3
4
5
.093 – .104 (2.362 – 2.642)
6
7
8
.037 – .045 (0.940 – 1.143)
0° – 8° TYP
NOTE 3 .016 – .050 (0.406 – 1.270)
NOTE: 1. DIMENSIONS IN
.050 (1.270) BSC
.004 – .012 (0.102 – 0.305)
.014 – .019 (0.356 – 0.482) TYP
INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS 4. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
S16 (WIDE) 0502
RELATED PARTS PART NUMBER
DESCRIPTION
COMMENTS
LT1055/6
Precision, High Speed, JFET Input Operational Amplifiers
12V/µs Slew Rate, 5.5 MHz Bandwidth
LT1880
SOT-23, Rail-to-Rail Output, Picoamp Input Precision Op Amp
150µV Max Offset Voltage, 900pA Max Input Bias Current
LT1881/2
Dual and Quad Rail-to-Rail Output, Picoamp Input Precision Op Amps
50µV Max Offset Voltage, 200pA Max Input Bias Current
LT1884/5
Dual/Quad Rail-to-Rail Output, Picoamp Input Precision Op Amps
50µV Max Offset Voltage, 400pA Max Input Bias Current
LT6010
135µA, 14nV/rtHz, Rail-to-Rail Output, Precision Low Power Op Amp with Shutdown
35µV Max Offset Voltage, 110pA Max Input Bias Current
LT6011/12
Dual/Quad 135µA, 14nV/rtHz, Rail-to-Rail Output Precision Low Power Op Amps
60µV Max Offset Voltage, 300pA Max Input Bias Current
LTC6078/9
Micropower Precision, Dual/Quad CMOS Rail-to-Rail Input/Output Amplifiers
Maximum Offset Drift: 0.7µV/°C
LTC6241/2
Dual/Quad 18MHz, Low Noise, Rail-to-Rail CMOS Op Amps
O.1Hz to 10Hz Noise: 550nVP-P
10578fb
16
Linear Technology Corporation
LT 1205 REV B • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 1989
