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.