INA125UA - Instrumentation Amplifier with Precision Voltage Reference  DataSheet

DESCRIPTION

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 (250mV), low offset drift (2mV/°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 pinselectable 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.

FEATURES Low quiescent current: 460 uA Precision voltage reference: 1.24V, 2.5V, 5V or 10V Sleep mode Low offset voltage: 250uV max Low offset drift: 2uV / oC max Low input bias current: 20 nA max High cmr: 100db min Low noise: 38nv / 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 APPLICATIONS Pressure and temperature bridge Amplifiers Industrial process control Factory automation Multi-channel data acquisition Battery operated systems General purpose instrumentation

Specfications:  Manufacturer:  Texas Instruments  CMRR (Min) (dB)  100      Number of Channels  1      Pin / Package  16-SOIC  Input Offset (+/-) (Max) (uV)  250      Input Offset Drift (+/-) (Max) (uV/Degrees Celsius)  2      Input Bias Current (+/-) (Max) (nA)  25      Noise at 1kHz (Typ) (nV/rt(Hz))  38      Quiescent Current (+/-) (Typ) (mA)  0.46      Settling Time to 0.01% (Typ) (us)  375      Gain (V/V)  1 to 10000      Input Type  Bipolar      Non-Linearity (+/-) (Max) (%)  0.012      Bandwidth at G=100 (Min) (kHz)  4.5      Vs (Min) (V)  2.7      Vs (Max) (V)  36      Edit by  www.tme.vn