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Precision op amps (Vos<1mV)

LPV821

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650nA, Precision Zero-Drift Nanopower Amplifier

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Data sheet

LPV821

ACTIVE
Data sheet Order now

Product details

Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 3.6 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.7 Vos (offset voltage at 25°C) (max) (mV) 0.01 Offset drift (typ) (µV/°C) 0.02 GBW (typ) (MHz) 0.008 Features EMI Hardened, Zero Drift Slew rate (typ) (V/µs) 0.0033 Rail-to-rail In, Out Iq per channel (typ) (mA) 0.00065 Vn at 1 kHz (typ) (nV√Hz) 215 CMRR (typ) (dB) 125 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.021 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) 0 Input common mode headroom (to positive supply) (typ) (V) 0 Output swing headroom (to negative supply) (typ) (V) 0.012 Output swing headroom (to positive supply) (typ) (V) -0.012
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 3.6 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.7 Vos (offset voltage at 25°C) (max) (mV) 0.01 Offset drift (typ) (µV/°C) 0.02 GBW (typ) (MHz) 0.008 Features EMI Hardened, Zero Drift Slew rate (typ) (V/µs) 0.0033 Rail-to-rail In, Out Iq per channel (typ) (mA) 0.00065 Vn at 1 kHz (typ) (nV√Hz) 215 CMRR (typ) (dB) 125 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.021 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) 0 Input common mode headroom (to positive supply) (typ) (V) 0 Output swing headroom (to negative supply) (typ) (V) 0.012 Output swing headroom (to positive supply) (typ) (V) -0.012
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • 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
  • 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

The LPV821 is a single-channel, nanopower, zero-drift 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.

The LPV821 amplifier also features an input stage with rail-to-rail input common mode range and an output stage that swings within 12 mV of the rails, maintaining the widest dynamic range possible. The device is EMI hardened to reduce system sensitivity to unwanted RF signals from mobile 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.

 

The LPV821 is a single-channel, nanopower, zero-drift 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.

The LPV821 amplifier also features an input stage with rail-to-rail input common mode range and an output stage that swings within 12 mV of the rails, maintaining the widest dynamic range possible. The device is EMI hardened to reduce system sensitivity to unwanted RF signals from mobile 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.

 
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Technical documentation

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* Data sheet LPV821, 650nA, Precision, Nanopower, Zero-Drift Amplifier datasheet (Rev. A) PDF | HTML 15 Dec 2017
Circuit design Low-power, bidirectional current-sensing circuit (Rev. B) PDF | HTML 02 Oct 2024
Circuit design Single-supply, low-side, unidirectional current-sensing circuit (Rev. A) PDF | HTML 26 Sep 2024
Application brief Zero-Drift Amplifiers: Features and Benefits (Rev. C) 28 Jan 2021
Application note Nano-Power Transimpedance Amplifier for Current Output Sensors 07 Mar 2018
Application brief GPIO Pins Power Signal Chain in Personal Electronics Running on Li-Ion Batteries 12 Feb 2018
Technical article How to make precision measurements on a nanopower budget, part 2: current sensing PDF | HTML 08 Feb 2018
Application brief Simplifying Environmental Measurements in Power Conscious Factory and Building A (Rev. A) 09 Jan 2018
Application note Advantages of using Nanopower Zero Drift Amp for Mobile Phone Battery Voltage Mo (Rev. A) 21 Dec 2017
Technical article How to make precision measurements on a nanopower budget, part 1: DC gain in nanop PDF | HTML 06 Dec 2017
Application note Current Sensing in No-Neutral Light Switches (Rev. A) 16 Oct 2017

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