INA121U

The INA121U is a FET-input low power Instrumentation Amplifier offering excellent accuracy. Its versatile three-op amp design and very small size make it ideal for a variety of general purpose applications. Low bias current (±4pA) allows use with high impedance sources. Gain can be set from 1V to 10000V/V with a single external resistor. Internal input protection can withstand up to ±40V without damage. The INA121 is laser-trimmed for very low offset voltage (±200mV) and high common-mode rejection (106dB at G=100). It operates on power supplies as low as ±2.25V (+4.5V), allowing use in battery operated and single 5V systems. Quiescent current is only 450mA.

• Input protection to ±40V
• ±4pA Low bias current
• ±450μA Low quiescent current
• ±2μV/°C Low input offset drift
• 20nV/√Hz at f=1kHz (G=100) Low input noise
• 0.001% Maximum low nonlinearity error
• Green product and no Sb/Br

Applications

Medical, Signal Processing, Sensing & Instrumentation, Test & Measurement, Portable Devices