| Number of channels (#) | 1 |
| Vs (Max) (V) | 36 |
| Vs (Min) (V) | 2.7 |
| Input offset (+/-) (Max) (uV) | 250 |
| Gain (Min) (V/V) | 4 |
| Gain (Max) (V/V) | 10000 |
| Noise at 1 kHz (Typ) (nV/rt (Hz)) | 38 |
| Features | Overvoltage Protection |
| CMRR (Min) (dB) | 100 |
| Input offset drift (+/-) (Max) (uV/C) | 2 |
| Input bias current (+/-) (Max) (nA) | 25 |
| Iq (Typ) (mA) | 0.46 |
| Bandwidth at min gain (Typ) (MHz) | 0.15 |
| Gain error (+/-) (Max) (%) | 0.5 |
| Operating temperature range (C) | -40 to 85 |
| Type | Resistor |
| Output swing headroom (to negative supply) (Typ) (V) | 0.4 |
| Output swing headroom (to positive supply) (Typ) (V) | -0.9 |
| Input common mode headroom (to negative supply) (Typ) (V) | 4.3 |
| Input common mode headroom (to positive supply) (Typ) (V) | -4.8 |
| Noise at 0.1 Hz-10 Hz (Typ) (uVpp) | 0.8 |
| Gain non-linearity (+/-) (Max) (%) | 0.004 |
- LOW QUIESCENT CURRENT: 460μA
- PRECISION VOLTAGE REFERENCE: 1.24V, 2.5V, 5V or 10V
- SLEEP MODE
- LOW OFFSET VOLTAGE: 250μV max
- LOW OFFSET DRIFT: 2μV/°C max
- LOW INPUT BIAS CURRENT: 20nA max
- HIGH CMR: 100dB min
- LOW NOISE: 38nV/sqrt(Hz) at f = 1kHz
- INPUT PROTECTION TO ±40V
- WIDE SUPPLY RANGE
- Single Supply: 2.7V to 36V
- Dual Supply: ±1.35V to ±18V
- 16-PIN DIP and SO-16 SOIC PACKAGES
The INA125 is a low power, high accuracy instrumentation amplifier with a precision voltage reference. It provides complete bridge excitation and precision differential-input amplification on a single integrated circuit.
A single external resistor sets any gain from 4 to 10,000. The INA125 is laser-trimmed for low offset voltage (250μV), low offset drift (2μV/°C), and high common-mode rejection (100dB at G = 100). It operates on single (+2.7V to +36V) or dual (±1.35V to ±18V) supplies.
The voltage reference is externally adjustable with pin-selectable voltages of 2.5V, 5V, or 10V, allowing use with a variety of transducers. The reference voltage is accurate to ±0.5% (max) with ±35ppm/°C drift (max). Sleep mode allows shutdown and duty cycle operation to save power.
The INA125 is available in 16-pin plastic DIP and SO-16 surface-mount packages and is specified for the -40°C to +85°C industrial temperature range.