The INA128 is low-power, general purpose instrumentation amplifiers offering excellent accuracy. The versatile 3-op amp design and small size make these amplifiers ideal for a wide range of applications. Current-feedback input circuitry provides wide bandwidth even at high gain (200 kHz at G = 100).
A single external resistor sets any gain from 1 to 10,000. The INA128 provides an industry-standard gain equation. The INA128 is available in 8-pin plastic DIP and SO-8 surface-mount packages, specified for the –40°C to +85°C temperature range. The INA128 is also available in a dual configuration, the INA2128.
Features:-
• A newer version of this device is now available: INA828
• Low offset voltage: 50 μV maximum
• Low drift: 0.5 μV/°C maximum
• Low Input Bias Current: 5 nA maximum
• High CMR: 120 dB minimum
• Inputs protected to ±40 V
• Wide supply range: ±2.25 V to ±18 V
• Low quiescent current: 700 μA
• Packages: 8-pin plastic DIP, SO-8
Specification:-
| Parameter | Specification |
| Number of channels (#) | 1 |
| Vs (Max) (V) | 36 |
| Vs (Min) (V) | 4.5 |
| Input offset (+/-) (Max) (uV) | 50 |
| Gain (Min) (V/V) | 1 |
| Gain (Max) (V/V) | 10000 |
| Noise at 1 kHz (Typ) (nV/rt (Hz)) | 8 |
| CMRR (Min) (dB) | 120 |
| Input offset drift (+/-) (Max) (uV/C) | 0.5 |
| Input bias current (+/-) (Max) (nA) | 5 |
| Iq (Typ) (mA) | 0.7 |
| Bandwidth at min gain (Typ) (MHz) | 1.3 |
| Gain error (+/-) (Max) (%) | 2 |
| Operating temperature range (C) | -40 to 85 |
| Noise at 0.1 Hz-10 Hz (Typ) (uVpp) | 0.2 |
| Gain non-linearity (+/-) (Max) (%) | 0.012 |
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