1 Features
• Gain programmable from
G = 0.2 to 10,000 by using external resistor
• Fully differential outputs with integrated clamping
• Low offset voltage: 10 μV (typ), 35 μV (max)
• Low offset drift: 0.1 μV/°C (typ), 0.3 μV/°C (max)
• Low input bias current: 5 nA (typ)
• Input stage noise: 3.2 nV/√Hz, 0.8 pA/√Hz
• Wide bandwidth: 22 MHz at G = 0.2,
15 MHz at G = 1
• Common-mode rejection: 106 dB (min) at G = 10,
120 dB (min) at 100 ≤ G ≤ 1000
• Power supply rejection: 110 dB (min) at G = 1
• Supply current: 6 mA (typ)
• Input overvoltage protection to ±40 V beyond
supplies
• Supply range:
– Single supply: 8 V to 36 V
– Dual supply: ±4 V to ±18 V
• Specified temperature range: –40°C to +125°C
• Tiny package: 16-pin VQFN

2 Applications
• Analog input module
• Flow transmitter
• LCD test
• Electrocardiogram (ECG)
• Surgical equipment
• Oscilloscope (DSO)
• Weigh scale
• Semiconductor test

3 Description
The INA851 is the industry's first high-precision
instrumentation amplifier with fully differential outputs.
This device is optimized to drive inputs of modern
high performance analog-to-digital converters (ADCs)
with fully differential inputs. The INA851 operates over
a very-wide, single-supply or dual-supply range. The
output stage gain can be set to either 0.2 or to 1 by
shorting or floating two pins. A single external resistor
sets any input stage gain from 1 to 10,000.
Compared to other amplifiers in the same class,
the INA851 offers very-low input bias current and
low input-referred current noise as a result of superbeta
input transistors. A state-of-the-art manufacturing
process provides exceptionally low voltage noise,
input offset voltage, and offset voltage drift. Additional
circuitry protects the device inputs against overvoltage
up to ±40 V beyond the power-supply voltages.The
device outputs feature built-in clamping circuitry to
protect the ADC or downstream device against
overdrive damage.
The device is designed for operation from either
an 8-V minimum single or ±4-V dual supply, and a
maximum of 36-V single or ±18 V dual supply.