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LPV821 Datasheet(PDF) 1 Page - Texas Instruments |
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LPV821 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 18 page LOAD V S Load Current + VOUT Vcc Rshunt R1 R3 + Vshunt R4 LPV821 Vbias R2 Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. ADVANCE INFORMATION for pre-production products; subject to change without notice. LPV821 SNOSD36 – AUGUST 2017 LPV821, 650nA, Precision, Nanopower, Zero-Drift Amplifier 1 1 Features 1 • Quiescent Current: 650 nA • Low Offset Voltage: ±20 μV (Maximum) • Zero Drift: 0.08 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 • 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, 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 (20 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. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LPV821 SOT-23 (5) 2.90 mm × 1.60 mm LPV821* X2QFN (8) 1.50 mm × 1.50 mm Precision Nano-Power Amplifier Family FAMILY CHAN COUNT IQ PER CHAN VOS (MAX) VSUPPLY LPV821 1 650 nA 20 µV 1.7 to 3.6 V LPV811 1 450 nA 370 µV 1.6 to 5.5 V LPV812 2 425 nA 300 µV 1.6 to 5.5 V OPA369 1,2 800 nA 750 µV 1.8 to 5.5 V (1) For all available packages, see the orderable addendum at the end of the data sheet. (2) * Planned for near-future release Low-Side, Always-On Current Sense |
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