LPV821 - 650nA, Precision Zero-Drift Nanopower Amplifier

The LPV821 is a single-channel, nanopower, zero-drift operational amplifier for “AlwaysON” sensing applications in wireless and wired equipment where low input offset is required. Withthe combination of low initial offset, low offset drift, and 8 kHz of bandwidth from 650 nA ofquiescent current, the LPV821 is the industry’s lowest power zero-drift amplifier that can be usedfor end equipment that monitor current consumption, temperature, gas, or strain gauges.

The LPV821 zero-drift operational amplifier uses a proprietary auto-calibration techniqueto simultaneously provide low offset voltage (10 µV, maximum) and minimal drift over time andtemperature. In addition to having low offset and ultra-low quiescent current, the LPV821 amplifierhas pico-amp bias currents which reduce errors commonly introduced in applications monitoringsensors with high output impedance and amplifier configurations with megaohm feedbackresistors.

The LPV821 amplifier also features an input stage with rail-to-rail input common moderange and an output stage that swings within 12 mV of the rails, maintaining the widest dynamicrange possible. The device is EMI hardened to reduce system sensitivity to unwanted RF signals frommobile phones, WiFi, radio transmitters, and tag readers.

The LPV821 zero-drift amplifier operates with a single supply voltage as low as 1.7V,ensuring continuous performance in low battery situations over the extended temperature range of-40ºC to 125ºC. The LPV821 (single) is available in industry standard 5-pin SOT-23.

• 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 µV_PP
• 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

All trademarks are the property of their respective owners.