Texas Instruments LPV821 Zero-Drift Nanopower Amplifier
Texas Instruments LPV821 Zero-Drift Nanopower Amplifier is a single-channel 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 8kHz of bandwidth from 650nA of quiescent current, the LPV821 is the industry's lowest-power zero-drift amplifier. This amplifier can be used for end equipment that monitors current consumption, temperature, gas, or strain gauges.
The Texas Instruments LPV821 uses a proprietary auto-calibration technique to simultaneously provide low offset voltage (10µV, maximum) and minimal drift over time and temperature. In addition, the 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.
Features
- 650nA quiescent current
- ±10µV (maximum) low offset voltage
- ±0.096µV/°C (maximum) offset voltage drift
- 0.1Hz to 10Hz Noise (3.9µVPP)
- ±7pA input bias current
- 8kHz gain bandwidth
- 1.7V to 3.6V supply voltage
- Rail-to-rail input/output
- Industry-standard package
- Single in 5-pin SOT-23
- EMI hardened
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
Functional Block Diagram
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Published: 2018-04-06
| Updated: 2022-11-22