1 Features

• Optimized for cost and size sensitive applications

• Super-beta bipolar precision:

– High common-mode rejection: 126dB

(minimum) for G = 20V/V to 1000V/V

– Low offset voltage: 60μV (typical), 350μV

(maximum)

– Low offset voltage drift: 0.7μV/°C (typical),

2μV/°C (maximum)

– Low gain non-linearity: 10ppm (G = 100V/V)

(maximum)

– High power supply rejection: 123dB (minimum)

for G = 20V/V to 1000V/V

– Voltage noise density: 40nV/√Hz at f = 1kHz

• Gain set with external resistor divider for G ≥

20V/V

– Maximum differential input voltages of ±125mV

• Bandwidth: 550kHz (G = 20), 100kHz (G = 100)

• Supply range:

– Single-supply: 4.5V to 36V

– Dual-supply: ±2.25V to ±18V

– Supply current: 300μA (typical)

• Specified temperature range: –40°C to +125°C

2 Applications

• Battery cell formation & test equipment

• Flat panel display (FPD) shorting bar pattern

generator

• Electrocardiogram (ECG)

• Weigh scale

3 Description

The INA630 is a high-precision instrumentation

amplifier that offers low power consumption and

operates over a wide single-supply or dual-supply

range. The INA630 is optimized for small differential

voltages (±125mV maximum) while providing

excellent common-mode suppression (126dB CMRR).

The INA630 offers flexible gain setting with an

external resistor divider of minimum G = 20V/V.

The INA630 is based on an indirect current

feedback architecture that offers low gain error

and non-linearity. Due to the architecture the

reference pin impedance does not degrade the

CMRR performance. The device enables wider input

and output voltage range compared to traditional

instrumentation amplifiers. The device has high

precision as a result of super-beta input transistors,

which provide low input offset voltage, offset voltage

drift, low bias current and current noise.