Transcript
LT1178/LT1179 17µA Max, Dual and Quad, Single Supply, Precision Op Amps
FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■
■
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■
DESCRIPTIO
17µA Max Supply Current per Amplifier 70µV Max Offset Voltage 250pA Max Offset Current 5nA Max Input Bias Current 0.9µVP-P 0.1Hz to 10Hz Voltage Noise 1.5pAP-P 0.1Hz to 10Hz Current Noise 0.5µV/°C Offset Voltage Drift 85kHz Gain-Bandwidth Product 0.04V/µs Slew Rate Single Supply Operation: Input Voltage Range Includes Ground Output Swings to Ground While Sinking Current No Pull Down Resistors are Needed Output Sources and Sinks 5mA Load Current
■ ■ ■
The extremely low supply current is combined with true precision specifications: offset voltage is 30µV, offset current is 50pA. Both offset parameters have low drift with temperature. The 1.5pAp-p current noise and picoampere offset current permit the use of megaohm level source resistors without introducing serious errors. Voltage noise, at 0.9µVp-p, is remarkably low considering the low supply current. Both the LT1178 and LT1179 can be operated from a single supply (as low as one lithium cell or two NiCd batteries). The input range goes below ground. The all-NPN output stage swings to within a few millivolts of ground while sinking current—no power consuming pull down resistors are needed.
U APPLICATIO S ■
The LT ®1178 is a micropower dual op amp in the standard 8-pin configuration; the LT1179 is a micropower quad op amp offered in the standard 14-pin packages. Both devices are optimized for single supply operation at 5V. Specifications are also provided at ±15V supplies.
Battery or Solar Powered Systems Portable Instrumentation Remote Sensor Amplifier Satellite Circuitry Micropower Sample-and-Hold Thermocouple Amplifier Micropower Filters , LTC and LT are registered trademarks of Linear Technology Corporation.
For applications where three times higher supply current is acceptable, the micropower LT1077 single, LT1078 dual and LT1079 quad are recommended. The LT1077/78/79 have significantly higher bandwidth, slew rate, lower voltage noise and better output drive capability.
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TYPICAL APPLICATIO
Self-Buffered, Dual Output, Micropower Reference
Supply Current vs Temperature
2
– 1/2 LT1178
3
+
1
1.2365V OUTPUT 4V TO 9V
4 5
250k*
1/2 LT1178 6
0.1µF
+
8
LT1004-1.2
–
7
2.470V OUTPUT
0.1µF
2M 1M*
1M*
* = 0.1% FILM RESISTORS TOTAL BATTERY CURRENT = 28µA OUTPUT ACCURACY = ± 0.4% MAX TEMPERATURE COEFFICIENT = 20ppm/°C LOAD REGULATION = 25ppm/mA, IL ≤ 5mA, V + ≥ 5V LINE REGULATION = 10ppm/V LT1178/LT1179 • TA01
SUPPLY CURRENT PER AMPLIFIER (µA)
20
VS = ±15V
18
16 VS = 5V, 0V 14 VS = ±1.5V
12
10 –50
–25
25 50 0 TEMPERATURE (°C)
75
100
LT1178/LT1179 • TA02
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LT1178/LT1179 AXI U
RATI GS (Note 1) U
W W
W
ABSOLUTE
Supply Voltage ...................................................... ±22V Differential Input Voltage ....................................... ±30V Input Voltage ............... Equal to Positive Supply Voltage Input Voltage ............5V Below Negative Supply Voltage Output Short-Circuit Duration .......................... Indefinite
Operating Temperature Range LT1178I/LT1179I .................................. –40°C to 85°C LT1178C/LT1178S/LT1179C/LT1179S .......0°C to 70°C Storage Temperature Range ................ –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 V+ OUT A
OUT B
8
7
1 A
–IN A 2 IN A
– 3
LT1178ACH LT1178CH
B + +
–IN B
– 5
+ IN B V – (CASE) 4
8 V+
OUT A 1 –IN A 2 A +IN A 3 + – V 4
7 OUT B B+
6 –IN B 5 +IN B
N PACKAGE 8-LEAD PDIP TJMAX = 100°C, θJA = 150°C/W
H PACKAGE 8-LEAD TO-5 METAL CAN
ORDER PART NUMBER
TOP VIEW
J PACKAGE 8-LEAD CERDIP
OBSOLETE PACKAGE
LT1178ACN8 LT1178CN8 LT1178IN8 LT1178ACJ8 LT1178CJ8
ORDER PART NUMBER
TOP VIEW +IN A 1 V– 2
+IN B 3 –IN B 4
+A + B -
8
– IN A
7 6
OUT A V+
5
OUT B
LT1178S8 PART MARKING
S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 200°C/W
1178
Consider the N8 or S8 Package for Alternate Source TOP VIEW OUT A 1 –IN A 2 A +IN A 3 + V+ 4 +IN B 5 + B –IN B 6 OUT B 7
14 OUT D 13 –IN D
D+ 12 +IN D
11 V – + 10 +IN C C9 –IN C
ORDER PART NUMBER
Not Recommended. Use LT1178S8 for New Designs.
LT1179ACN LT1179CN LT1179IN
8 OUT C
N PACKAGE 14-LEAD PDIP TJMAX = 110°C, θJA = 130°C/W J PACKAGE 14-LEAD CERAMIC DIP
OBSOLETE PACKAGE
LT1179ACJ LT1179CJ
TOP VIEW NC 1
16 NC
NC 2
15 NC
OUT A 3
14 V +
–IN A 4 +IN A 5 V– 6
LT1178
13 OUT B
ORDER PART NUMBER LT1178SW LT1179SW
TOP VIEW OUT A 1
16 OUT D
–IN A 2
15 –IN D
+IN A 3 V+ 4
14 +IN D
LT1179
13 V –
12 –IN B
+IN B 5
12 +IN C
11 +IN B
–IN B 6
11 –IN C
OUT B 7
10 OUT C
NC 7
10 NC
NC 8
9
NC 8
NC
9 NC
SW PACKAGE 16-LEAD PLASTIC SO WIDE TJMAX = 150°C, θJA = 90°C/W
SW PACKAGE 16-LEAD PLASTIC SO WIDE TJMAX = 150°C, θJA = 90°C/W
Consider the N14 Package for Alternate Source
LT11778/1179 • POI01
Consult LTC Marketing for parts specified with wider operating temperature ranges. Please note that the LT1178S8 surface mount pinout differs from that of the LT1178 standard plastic or ceramic dual-in-line packages. For similiar performance with standard pinout, see the LT2178.
ELECTRICAL CHARACTERISTICS
VS = 5V, 0V; VCM = 0.1V, VO = 1.4V, TA = 25°C, unless noted. LT1178AC/LT1179AC MIN TYP MAX
LT1178I/C/S/LT1179I/C/S MIN TYP MAX
30 35
40 40 80 90 60
SYMBOL
PARAMETER
CONDITIONS (NOTE 2)
VOS
Input Offset Voltage
LT1178 LT1179 LT1178SW LT1179SW LT1178S8
∆VOS ∆Time
Long Term Input Offset Voltage Stability
0.5
IOS
Input Offset Current
0.05
70 100
120 150 450 600 180
0.6 0.25
0.05
UNITS µV µV µV µV µV µV/Mo
0.35
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LT1178/LT1179
ELECTRICAL CHARACTERISTICS
LT1178AC/LT1179AC MIN TYP MAX
LT1178I/C/S/LT1179I/C/S MIN TYP MAX
3
5
3
0.1Hz to 10Hz (Note 3)
0.9
2.0
0.9
µVP-P
Input Noise Voltage Density
fO = 10Hz (Note 3) fO = 1000Hz (Note 3)
50 49
75 65
50 49
nV/√Hz nV/√Hz
Input Noise Current
0.1Hz to 10Hz (Note 3)
1.5
2.5
1.5
pAp-p
Input Noise Current Density
fO = 10Hz (Note 3) fO = 1000Hz
0.03 0.01
0.07
0.03 0.01
pA/√Hz pA/√Hz
Input Resistance Differential Mode Common Mode
(Note 4)
SYMBOL
PARAMETER
IB
Input Bias Current
en
Input Noise Voltage
in
VS = 5V, 0V; VCM = 0.1V, VO = 1.4V, TA = 25°C, unless noted.
CONDITIONS (NOTE 2)
6
UNITS nA
0.8
2.0 12
0.6
2.0 12
GΩ GΩ
Input Voltage Range
3.5 0
3.9 –0.3
3.5 0
3.9 –0.3
V V
CMRR
Common Mode Rejection Ratio VCM = 0V to 3.5V
93
103
90
102
dB
PSRR
Power Supply Rejection Ratio
VS = 2.2V to 12V
94
104
92
104
dB
AVOL
Large Signal Voltage Gain
VO = 0.03V to 4V, No Load (Note 4) VO = 0.03V to 3.5V, RL = 50k
140
700
110
700
V/mV
80
200
70
200
V/mV
Output Low, No Load Output Low, 2k to GND Output Low, ISINK = 100µA Output High, No Load Output High 2k to GND
4.2 3.5
6.5 0.2 120 4.4 3.8
4.2 3.5
6.5 0.2 120 4.4 3.8
0.013
0.025
0.013
0.025
V/µs
60
kHz
Maximum Output Voltage Swing
SR
Slew Rate
AV = 1, CL = 10pF (Note 4)
GBW
Gain Bandwidth Product
fO ≤ 5kHz
60
IS
Supply Current per Amplifier
VS = ±1.5V, VO = 0V
13 12
Channel Separation
∆VIN = 3V, RL = 10k
130
Minimum Supply Voltage
(Note 5)
2.0
9 0.6 160
18 17
14 13
9 0.6 160
21 20
130 2.2
2.0
mV mV mV V V
µA µA dB
2.2
V
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LT1178/LT1179
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C for I grades, 0°C ≤ TA ≤ 70°C for SW grades, VS = 5V, 0V; VCM = 0.1V, VO = 1.4V, unless noted. (Note 7) LT1178I/LT1179I MIN TYP MAX
LT1178SW/LT1179SW MIN TYP MAX
● ●
80 80
315 345
120 130
650 800
µV µV
●
0.6
3.0
0.8
4.5
µV/°C
Input Offset Current
●
0.07
0.7
0.06
0.50
nA
IB
Input Bias Current
●
4
8
3
7
nA
CMRR
Common Mode Rejection Ratio
VCM = 0.05V to 3.2V I grade VCM = 0V to 3.4V S grade
●
84
98
86
100
dB
PSRR
Power Supply Rejection Ratio
VS = 3.0V to 12V I grade VS = 2.5V to 12V S grade
●
86
100
88
102
dB
AVOL
Large-Signal Voltage Gain
VO = 0.05V to 4V, No Load (Note 4) ● ● VO = 0.05V to 3.5V, RL = 50k
55 35
350 130
80 45
500 160
V/mV V/mV
Maximum Output Voltage Swing
Output Low, No Load Output Low, ISINK = 100µA Output High, No Load Output High, 2k to GND
13 220 4.1 3.3
8 140 4.3 3.8
11 190
3.9 3.0
9 160 4.2 3.7
mV mV V V
15
27
15
24
µA
SYMBOL
PARAMETER
CONDITIONS
VOS
lnput Offset Voltage
LT1178 LT1179
∆VOS/∆T
Input Offset Voltage Drift
(Note 6)
IOS
IS
Supply Current per Amplifier
● ● ● ● ●
UNITS
The ● denotes specifications which apply over the full operating temperature range of 0°C ≤ TA ≤ 70°C, VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, unless noted. SYMBOL
PARAMETER
CONDITIONS
VOS
lnput Offset Voltage
LT1178 LT1178S8 LT1179 (Note 6) LT1178S8
LT1178AC/LT1179AC MIN TYP MAX
LT1178C/S8/LT1179C MIN TYP MAX
● ● ●
50
170
60
200
65 85 70
250 350 290
µV µV µV
● ●
0.5
2.2
0.6 0.6
3.0 3.5
µV/°C µV/°C
UNITS
∆VOS/∆T
Input Offset Voltage Drift
IOS
Input Offset Current
●
0.06
0.35
0.06
0.50
nA
IB
Input Bias Current
●
3
6
3
7
nA
CMRR
Common Mode Rejection Ratio VCM = 0V to 3.4V
●
90
101
86
100
dB
PSRR
Power Supply Rejection Ratio
VS = 2.5V to 12V
●
90
102
88
102
dB
AVOL
Large-Signal Voltage Gain
VO = 0.05V to 4V, No Load (Note 4) VO = 0.05V to 3.5V, RL = 50k
● ●
105 55
500 160
80 45
500 160
V/mV V/mV
Maximum Output Voltage Swing
Output Low, No Load Output Low, ISINK = 100µA Output High, No Load Output High, 2k to GND
● ● ● ●
11 190 4.1 3.3
8 140 4.3 3.8
11 190
4.1 3.3
8 140 4.3 3.8
mV mV V V
14
21
15
24
µA
IS
Supply Current per Amplifier
●
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LT1178/LT1179
ELECTRICAL CHARACTERISTICS VS = ±15V, TA = 25°C, unless noted. SYMBOL
PARAMETER
VOS
Input Offset Voltage
CONDITIONS
LT1178AC/LT1179AC MIN TYP MAX
LT1178I/C/S/LT1179I/C/S MIN TYP MAX
80
350
100 150 160 120
480 900 1050 350
LT1178SW LT1179SW LT1178S8
UNITS µV µV µV µV
IOS
lnput Offset Current
0.05
0.25
0.05
0.35
nA
IB
Input Bias Current
3
5
3
6
nA
Input Voltage Range
13.5 –15.0
13.9 –15.3
13.5 –15.0
13.9 –15.3
V V
CMRR
Common Mode Rejection Ratio
VCM = 13.5V, –15V
97
106
94
106
dB
PSRR
Power Supply Rejection Ratio
VS = 5V, 0V to ±18V
96
112
94
112
dB
AVOL
Large-Signal Voltage Gain
VO = ±10V, RL = 50k VO = ±10V, No Load
300 600
1200 2500
250 400
1000 2500
V/mV V/mV
VOUT
Maximum Output Voltage Swing
RL = 50k RL = 2k
±13.0 ±11.0
±14.2 ±12.7
±13.0 ±11.0
±14.2 ±12.7
V V
SR
Slew Rate
AV = 1
0.02
0.04
0.02
0.04
V/µs
GBW
Gain Bandwidth Product
fO ≤ 5kHz
85
kHz
IS
Supply Current per Amplifier
85 16
21
17
25
µA
The ● denotes specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C for I grades, 0°C ≤ TA ≤ 70°C for SW grades, VS = ±15V, unless noted. LT1178I/LT1179I MIN TYP MAX
LT1178SW/LT1179SW MIN TYP MAX
130 130
740 740
190 200
●
0.7
4.0
0.9
5.5
µV/°C
●
0.07
0.7
0.06
0.35
nA
●
4
8
3
7
nA
SYMBOL
PARAMETER
CONDITIONS
VOS
lnput Offset Voltage
LT1178 LT1179
● ●
∆VOS/∆T
Input Offset Voltage Drift
(Note 6)
IOS
Input Offset Current
IB
Input Bias Current
AVOL
Large-Signal Voltage Gain
VO = ±10V, RL = 50k
●
100
500
150
750
V/mV
CMRR
Common Mode Rejection Ratio
VCM = 13V, –14.9V
●
88
103
91
104
dB
Power Supply Rejection Ratio
VS = 5V, 0V to ±18V
●
88
109
91
110
dB
Maximum Output Voltage Swing
RL = 5k
●
±11.0
±13.5
±11.0
±13.5
V
PSRR IS
Supply Current per Amplifier
●
19
30
18
1150 1300
28
UNITS µV µV
µA
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LT1178/LT1179
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating tempera-
ture range of 0°C ≤ TA ≤ 70°C, VS = ±15V, unless noted. SYMBOL
PARAMETER
VOS
lnput Offset Voltage
CONDITIONS
LT1178AC/LT1179AC MIN TYP MAX
LT1178C/S8/LT1179C MIN TYP MAX
UNITS
● ●
100
480
LT1178S8
130 150
660 540
µV µV
(Note 6) LT1178S8
● ●
0.6
2.8
0.7 0.7
4.0 3.8
µV/°C µV/°C
●
0.06
0.35
0.06
0.35
nA
3
6
3
7
∆VOS/∆T
Input Offset Voltage Drift
IOS
Input Offset Current
IB
Input Bias Current
AVOL
Large-Signal Voltage Gain
VO = ±10V, RL = 50k
●
200
800
150
750
V/mV
CMRR
Common Mode Rejection Ratio
VCM = 13V, –15V
●
94
104
91
104
dB
Power Supply Rejection Ratio
VS = 5V, 0V to ±18V
●
93
110
91
110
dB
Maximum Output Voltage Swing
RL = 5k
●
±11.0
±13.6
±11.0
±13.6
V
PSRR IS
●
Supply Current per Amplifier
17
●
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 parameter distributions of individual amplifiers; (i.e., out of 100 LT1179s, or 100 LT1178s, typically 240 op amps, or 120, will be better than the indicated specification). Note 3: This parameter is tested on a sample basis only. All noise parameters are tested with VS = ±2.5, VO = 0V.
24
18
nA
28
µA
Note 4: This parameter is guaranteed by design and is not tested. Note 5: Power supply rejection ratio is measured at the minimum supply voltage. The op amps actually work at 1.7V supply but with a typical offset skew of –300µV. Note 6: This parameter is not 100% tested. Note 7: During testing at –40°C, the 5V power supply turn on-time is less than 0.5 seconds.
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TYPICAL PERFOR A CE CHARACTERISTICS Input Offset Voltage Distribution N, J, H Package VS = 5V, 0V TA = 25°C
1000
500
0 –150 –100
–50 0 50 OFFSET VOLTAGE (µV)
100
150
LT1178/LT1179 • TPC01
VS = 5V, 0V TA = 25°C
600
Minimum Supply Voltage 100
262 LT1178SW 342 LT1179SW 1892 OP AMPS TESTED
400
200
0 – 600 – 400
OFFSET VOLTAGE SHIFT (µV)
NUMBER OF OP AMPS
1500
980 LT1178N8 190 LT1178J8 190 LT1178H8 702 LT1179N 144 LT1179J 6104 OP AMPS TESTED
800
NUMBER OF OP AMPS
2000
Input Offset Voltage Distribution Surface Mount Package
V – = 0V
0
85°C
–100
25°C – 40°C
–200 –300 NON-FUNCTIONAL – 400 –500
– 200 0 200 OFFSET VOLTAGE (µV)
400
600
LT1178/LT1179 • TPC02
0
2 3 1 POSITIVE SUPPLY VOLTAGE (V) LT1178/LT1179 • TPC03
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LT1178/LT1179 U W
TYPICAL PERFOR A CE CHARACTERISTICS
1000
VS = 5V, 0V
SATURATION VOLTAGE (mV)
75 IOS
50 25
INPUT BIAS CURRENT (nA)
– 2.5 IB
– 3.0
VS = 5V, 0V
ISINK = 1mA ISINK = 100µA
100 ISINK = 1µA 10 NO LOAD 10k TO GROUND
1
– 3.5
2k TO GROUND
– 4.0 –50
–25
50 25 0 TEMPERATURE (°C)
75
0.1 –50
100
–25
50 25 0 TEMPERATURE (°C)
0.1Hz to 10Hz Noise
VOLTAGE NOISE DENSITY (nV/√Hz) CURRENT NOISE DENSITY (fA/√Hz)
NOISE VOLTAGE (0.4µV/DIV)
NOISE VOLTAGE (0.4µV/DIV) 10
12
0
20
80 40 60 TIME (SECONDS)
TA = 25°C
40 VS = 5V, 0V
VOLTAGE GAIN (dB)
VS = ±15V
1/f CORNER 0.5Hz
30
120 140
10
PHASE 5V, 0V GAIN 5V, 0V
– 10 10k
1
10 100 FREQUENCY (Hz)
1k
Voltage Gain vs Load Resistance
PHASE ±15V
160 180 200
GAIN ±15V
LT1178/LT1179 • TPC10
VOLTAGE NOISE
10M
TA = 25°C NO LOAD 100
20
0
1 10 100 1k 10k 100k 1M FREQUENCY (Hz)
100
LT1178/LT1179 • TPC09
80
0 –20 0.001 0.01 0.1
CURRENT NOISE
10 0.1
120
VS = ±15V, TA = 25°C PHASE SHIFT (DEGREES)
80
300
Gain, Phase vs Frequency 30
120 100
100
VS = ± 2.5V TA = 25°C
LT1178/LT1179 • TPC08
Voltage Gain vs Frequency
20
VS = ±15V
Noise Spectrum
LT1178/LT1179 • TPC07
60
– 20
2 0 1 TIME FROM OUTPUT SHORT TO GROUND (MINUTES)
CHANNEL B
8 4 6 TIME (SECONDS)
VS = ±2.5V
– 10
1000
CHANNEL A
CHANNEL B
140
0
LT1178/LT1179 • TPC06
VS = ±2.5V, TA = 25°C
CHANNEL A
2
VS = ±2.5V
0.01Hz to 10Hz Noise
VS = ±2.5V, TA = 25°C
0
VS = ±15V
10
– 30
100
75
VS = 5V, 0V
LT1178/LT1179 • TPC05
LT1178/LT1179 • TPC04
VOLTAGE GAIN (dB)
Short-Circuit Current 20
VOLTAGE GAIN (V/V)
INPUT OFFSET CURRENT (pA)
100
Output Saturation vs Temperature vs Sink Current SHORT-CIRCUIT CURRENT (mA) SINKING SOURCING
Input Bias and Offset Currents vs Temperature
1M
100k
VS = 5V, 0V, TA = 25°C VS = 5V, 0V, TA = 85°C
220 100k FREQUENCY (Hz)
240 1M LT1178/LT1179 • TPC11
10k 10k
100k 1M LOAD RESISTANCE TO GROUND (Ω)
10M
LT1178/LT1179 • TPC12
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LT1178/LT1179 U W
TYPICAL PERFOR A CE CHARACTERISTICS Large-Signal Transient Response VS = ±15V
Capacitive Load Handling
Large-Signal Transient Response VS = 5V, 0V
120 VS = 5V, 0V
AV = 1 80
1V/DIV
OVERSHOOT (%)
100
60 40 20
AV = 5
AV = 1 CL = 12pF
AV = 10
AV = 1 100µs/DIV CL = 12pF INPUT PULSE = 0V TO 3.8V
500µs/DIV
0 10
100 1000 CAPACITIVE LOAD (pF)
10,000
LT1178/LT1179 • TPC13
Small-Signal Transient Response VS = ±15V
AV = 1 CL = 12pF
20µs/DIV
AV = 1 20µs/DIV CL = 12pF INPUT 50 TO 150mV
20µs/DIV
Power Supply Rejection Ratio vs Frequency
Closed Loop Output Impedance
100 VS = ±15V 80 VS = 5V, 0V 60 40 20
10k 100 80
10
100 1k FREQUENCY (Hz)
10k
100k
LT1178/LT1179 • TPC19
POSITIVE SUPPLY
60
NEGATIVE SUPPLY
40 20 0
1
OUTPUT IMPEDANCE (Ω)
TA = 25°C
POWER SUPPLY REJECTION RATIO (dB)
120
120 COMMON MODE REJECTION RATIO (dB)
–100mV
20mV/DIV AV = 1 CL = 12pF
Common Mode Rejection Ratio vs Frequency
0
Small-Signal Transient Response VS = 5V, 0V
20mV/DIV
20mV/DIV
Small-Signal Transient Response VS = ±2.5V
VS = ±2.5V + 1Vp-p SINE WAVE TA = 25°C 0.1
1
10 100 1k FREQUENCY (Hz)
1k
ACL = 100
100
ACL = 10
10 VS = 5V, 0V IL = 0 TA = 25°C
1 10k
100k
LT1188/LT1189 • TPC20
ACL = 1
10
100
10k 1k FREQUENCY (Hz)
100k
LT1178/1179 • TPC21
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LT1178/LT1179
U
W
U U
APPLICATIO S I FOR ATIO
Please see the LT1078/LT1079 data sheet for applications information. All comments relating to specifications, single
supply operation and phase reversal protection are directly applicable to the LT1178/LT1179.
Micropower 100Hz to 1MHz V-to-F Converter 7V TO 10V
1.5M
VIN 0V TO 5V
100k 220k*
50k 1MHz TRIM
1N4148
100Hz TRIM 240k TYPICAL
NC
1µF
12k
+
47k
A1 1/2 LT1178
–
+
100Ω
+
+
10k
A2 1/2 LT1178
–
1µF
LT1004– 2.5
Q7 2N3904
Q8 2N3906
VDD
0.01µF
2k
0.33µF
Q7
CD4024
CLK 74C14
RESET
VSS
10M
3pF
FOUT 2µF LTC201
500pF POLYSTYRENE
S1
V+
IN1
S3
D1
D3
D2
D4
S2
S4
LINEARITY IS 0.02% QUIESCENT CURRENT IS 90µA SUPPLY CURRENT IS 360µA AT 1MHz DRIFT ≈ 50ppm/°C *TRW MTR/5 + 120ppm/°C
IN3
IN4
0.022µF V– IN2 GND LT1178/LT1179 • AI01
W W SI PLIFIED SCHE ATIC 10k
10k
1/2 LT1178 1/4 LT1179
2.2k
5.6k
1.3k
V+
33k
6.4k Q54 1
Q6
Q16
Q14
Q15
Q32
Q24
Q37
Q29 C1 50pF
Q4
Q46 1
C4 4pF
4
+ IN
Q27
Q40 Q35
2.9k
Q41
V+
Q26 30Ω
OUT
Q21
600Ω
3k
C5 2.5pF
1
Q1
V–
Q25
Q12 Q11
Q30 3
8.6k
600Ω
Q52
Q47
Q3
– IN
12.5k
Q53 2
1 Q5
11.5k
Q44 150k
Q31 Q28
Q2
Q18 V+
Q22
C3 40pF
J1
Q36
Q33
Q48
Q19 Q50
Q39 Q9 C2 175pF
6.2k
Q8
6.2k
Q49
Q23
Q10 Q17 Q7
Q42
V+ Q20 2A
9.1k Q45
10k Q34 3k
Q38 30Ω
Q51 Q55
700k
Q43 A
2A 5.35k
700k V–
11789fb
9
LT1178/LT1179 U
PACKAGE DESCRIPTIO
H Package 8-Lead TO-5 Metal Can (.230 Inch PCD) (Reference LTC DWG # 05-08-1321) .016 – .021** (0.406 – 0.533)
.027 – .045 (0.686 – 1.143)
.335 – .370 (8.509 – 9.398) DIA .305 – .335 (7.747 – 8.509) .040 (1.016) MAX
45°TYP
.050 (1.270) MAX
SEATING PLANE
PIN 1
.028 – .034 (0.711 – 0.864)
.230 (5.842) TYP
.165 – .185 (4.191 – 4.699) GAUGE PLANE
.010 – .045* (0.254 – 1.143)
REFERENCE PLANE .500 – .750 (12.700 – 19.050)
.110 – .160 (2.794 – 4.064) INSULATING STANDOFF *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) 0.230 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 11789fb
10
LT1178/LT1179 U
PACKAGE DESCRIPTIO
N8 Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) .400* (10.160) MAX 8
7
6
5
1
2
3
4
.255 ± .015* (6.477 ± 0.381)
.300 – .325 (7.620 – 8.255)
.065 (1.651) TYP
.008 – .015 (0.203 – 0.381) +.035 .325 –.015
(
8.255
+0.889 –0.381
.130 ± .005 (3.302 ± 0.127)
.045 – .065 (1.143 – 1.651)
.120 (3.048) .020 MIN (0.508) MIN .018 ± .003 (0.457 ± 0.076)
.100 (2.54) BSC
)
N8 1002
NOTE: 1. DIMENSIONS ARE
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 14
13
12
11
10
9
8
1
2
3
4
5
6
7
.255 ± .015* (6.477 ± 0.381)
.300 – .325 (7.620 – 8.255)
.045 – .065 (1.143 – 1.651)
.130 ± .005 (3.302 ± 0.127) .020 (0.508) MIN
.065 (1.651) TYP
.008 – .015 (0.203 – 0.381) +.035 .325 –.015
(
8.255
+0.889 –0.381
NOTE: 1. DIMENSIONS ARE
)
.120 (3.048) MIN
.005 (0.125) .100 MIN (2.54) BSC
.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
11789fb
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.
11
LT1178/LT1179
U
PACKAGE DESCRIPTIO
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
7
8
5
6
N N .245 MIN
.160 ±.005
1
.030 ±.005 TYP
.150 – .157 (3.810 – 3.988) NOTE 3
.228 – .244 (5.791 – 6.197) 2
3
N/2
N/2
RECOMMENDED SOLDER PAD LAYOUT
1
.010 – .020 × 45° (0.254 – 0.508)
3
2
4
.053 – .069 (1.346 – 1.752)
.008 – .010 (0.203 – 0.254)
.004 – .010 (0.101 – 0.254)
0°– 8° TYP
.016 – .050 (0.406 – 1.270)
.050 (1.270) BSC
.014 – .019 (0.355 – 0.483) TYP INCHES (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)
NOTE: 1. DIMENSIONS IN
SO8 0502
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
6
.093 – .104 (2.362 – 2.642)
7
8
.037 – .045 (0.940 – 1.143)
0° – 8° TYP
.050 (1.270) BSC
NOTE 3 .016 – .050 (0.406 – 1.270)
NOTE: 1. DIMENSIONS IN
.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
11789fb
12
Linear Technology Corporation
LW/TP 1102 1K 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 1991
