1 Features

1• Quiescent Current: 650 nA

• Low Offset Voltage: ±10 μV (Maximum)

• Offset Voltage Drift: ±0.096 μV/°C (Maximum)

• 0.1-Hz to 10-Hz Noise: 3.9 μVPP

• Input Bias Current: ±7 pA

• Gain Bandwidth: 8 kHz

• Supply Voltage: 1.7 V to 3.6 V

• Rail-to-Rail Input/Output

• Industry Standard Package

– Single in 5-pin SOT-23

• EMI Hardened

2 Applications

• Battery-Powered Instruments

• Gas Detection

• Process Analytics

• Fault Monitoring

• Current Sensing

– Shunt Resistor

– Current Transformer

• Temperature Measurements

– High Impedance Thermistors

– RTD's, Thermocouples

• Strain Gauges

– Electronic Scales

– Pressure Sensors

3 Description

The LPV821 is a single-channel, nanopower, zerodrift

operational amplifier for “Always ON” sensing

applications in wireless and wired equipment where

low input offset is required. With the combination of

low initial offset, low offset drift, and 8 kHz of

bandwidth from 650 nA of quiescent current, the

LPV821 is the industry's lowest power zero-drift

amplifier that can be used for end equipment that

monitor current consumption, temperature, gas, or

strain gauges.

The LPV821 zero-drift operational amplifier uses a

proprietary auto-calibration technique to

simultaneously provide low offset voltage (10 μV,

maximum) and minimal drift over time and

temperature. In addition to having low offset and

ultra-low quiescent current, the LPV821 amplifier has

pico-amp bias currents which reduce errors

commonly introduced in applications monitoring

sensors with high output impedance and amplifier

configurations with megaohm feedback resistors.