Datasheet LT1008 (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | Picoamp Input Current, Microvolt Offset, Low Noise Op Amp |
| Pages / Page | 16 / 10 — APPLICATIO S I FOR ATIO. Follower Feedforward Compensation. TYPICAL … |
| File Format / Size | PDF / 283 Kb |
| Document Language | English |
APPLICATIO S I FOR ATIO. Follower Feedforward Compensation. TYPICAL APPLICATIO S. Logarithmic Amplifier
Model Line for this Datasheet
Text Version of Document
LT1008
U U W U APPLICATIO S I FOR ATIO Follower Feedforward Compensation
30pF 10k 2 – 6 LT1008 OUTPUT 10k 5V/DIV 3 INPUT* + 8 1000pF 1008 AI06 *SOURCE RESISTANCE ≤15k FOR STABILITY 5μs/DIV 1008 AI07
U TYPICAL APPLICATIO S Logarithmic Amplifier
Q1A Q1B 124k* 5.1k 2N2979 2N2979 15V 15V LT1004C – 330pF 2k 100pF 2 1.2V 10k* 2 INPUT – 7 6 15.7k 6 LM107 LT1008 + 3 1k 3 + 4 TEL. LABS 8 TYPE Q81 1 –15V OUTPUT *1% FILM RESISTOR 30pF LOW BIAS CURRENT AND OFFSET VOLTAGE OF THE LT1008 ALLOW 4.5 DECADES OF VOLTAGE INPUT LOGGING
Amplifier for Bridge Transducers Saturated Standard Cell Amplifier
R5 15V 56M V+ 3 + 7 C1 2N3609 6 S1 30pF LT1008 OUTPUT T 100k 2 4 – R1 R3 1.018235V 1 8 100k 510k 2 SATURATED 1 – + STANDARD –15V 8 6 R4 CELL #101 LT1008 OUTPUT 510k EPPLEY LABS 3 + NEWPORT, R.I. 1000pF R2 S2 R2 R6 T 100k 100k 56M VOLTAGE GAIN ≈ 100 R1 1008 TA04 1008 TA05 THE TYPICAL 30pA BIAS CURRENT OF THE LT1008 WILL DEGRADE THE STANDARD CELL BY ONLY 1ppm/YEAR. NOISE IS A FRACTION OF A ppm. UNPROTECTED GATE MOSFET ISOLATES STANDARD CELL ON POWER DOWN 1008fb 10
U U W U APPLICATIO S I FOR ATIO Follower Feedforward Compensation
30pF 10k 2 – 6 LT1008 OUTPUT 10k 5V/DIV 3 INPUT* + 8 1000pF 1008 AI06 *SOURCE RESISTANCE ≤15k FOR STABILITY 5μs/DIV 1008 AI07
U TYPICAL APPLICATIO S Logarithmic Amplifier
Q1A Q1B 124k* 5.1k 2N2979 2N2979 15V 15V LT1004C – 330pF 2k 100pF 2 1.2V 10k* 2 INPUT – 7 6 15.7k 6 LM107 LT1008 + 3 1k 3 + 4 TEL. LABS 8 TYPE Q81 1 –15V OUTPUT *1% FILM RESISTOR 30pF LOW BIAS CURRENT AND OFFSET VOLTAGE OF THE LT1008 ALLOW 4.5 DECADES OF VOLTAGE INPUT LOGGING
Amplifier for Bridge Transducers Saturated Standard Cell Amplifier
R5 15V 56M V+ 3 + 7 C1 2N3609 6 S1 30pF LT1008 OUTPUT T 100k 2 4 – R1 R3 1.018235V 1 8 100k 510k 2 SATURATED 1 – + STANDARD –15V 8 6 R4 CELL #101 LT1008 OUTPUT 510k EPPLEY LABS 3 + NEWPORT, R.I. 1000pF R2 S2 R2 R6 T 100k 100k 56M VOLTAGE GAIN ≈ 100 R1 1008 TA04 1008 TA05 THE TYPICAL 30pA BIAS CURRENT OF THE LT1008 WILL DEGRADE THE STANDARD CELL BY ONLY 1ppm/YEAR. NOISE IS A FRACTION OF A ppm. UNPROTECTED GATE MOSFET ISOLATES STANDARD CELL ON POWER DOWN 1008fb 10
