型号LMP2021
品牌
分类精密运算放大器 (Vos<1mV)
描述零漂移、低噪声、抗 EMI 单通道放大器
相关操作
产品概述

参数

Number of channels 1
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.2
Vos (offset voltage at 25°C) (max) (mV) 0.005
GBW (typ) (MHz) 5
Features EMI Hardened, Zero Drift
Slew rate (typ) (V/µs) 2.6
Rail-to-rail In to V-, Out
Offset drift (typ) (µV/°C) 0.004
Iq per channel (typ) (mA) 0.95
Vn at 1 kHz (typ) (nV√Hz) 11
CMRR (typ) (dB) 139
Rating Catalog
Operating temperature range (°C) -40 to 125
Input bias current (max) (pA) 100
Iout (typ) (A) 0.05
Architecture CMOS
Input common mode headroom (to negative supply) (typ) (V) -0.2
Input common mode headroom (to positive supply) (typ) (V) -0.8
Output swing headroom (to negative supply) (typ) (V) 0.083
Output swing headroom (to positive supply) (typ) (V) -0.065

封装 | 引脚 | 尺寸

SOIC (D) 8 29.4 mm² 4.9 x 6
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8

特性

    (Typical Values, TA = 25°C, VS = 5 V)

  • Input Offset Voltage (Typical) −0.4 µV
  • Input Offset Voltage (Max) ±5 µV
  • Input Offset Voltage Drift (Typical) –0.004 µV/°C
  • Input Offset Voltage Drift (Max) ±0.02 µV/°C
  • Input Voltage Noise, AV = 1000 11 nV/√Hz
  • Open Loop Gain 160 dB
  • CMRR 139 dB
  • PSRR 130 dB
  • Supply Voltage Range 2.2 V to 5.5 V
  • Supply Current (per Amplifier) 1.1 mA
  • Input Bias Current ±25 pA
  • GBW 5 MHz
  • Slew Rate 2.6 V/µs
  • Operating Temperature Range −40°C to 125°C
  • 5-Pin SOT-23, 8-Pin VSSOP and 8-Pin SOIC Packages

说明

The LMP2021 and LMP2022 are single and dual precision operational amplifiers offering ultra low input offset voltage, near zero input offset voltage drift, very low input voltage noise and very high open loop gain. They are part of the LMP precision family and are ideal for instrumentation and sensor interfaces.

The LMP202x has only 0.004 µV/°C of input offset voltage drift, and 0.4 µV of input offset voltage. These attributes provide great precision in high accuracy applications.

The proprietary continuous auto zero correction circuitry ensures impressive CMRR and PSRR, removes the 1/f noise component, and eliminates the need for calibration in many circuits.

With only 260 nVPP (0.1 Hz to 10 Hz) of input voltage noise and no 1/f noise component, the LMP202x are suitable for low frequency applications such as industrial precision weigh scales. The extremely high open loop gain of 160 dB drastically reduces gain error in high gain applications. With ultra precision DC specifications and very low noise, the LMP202x are ideal for position sensors, bridge sensors, pressure sensors, medical equipment and other high accuracy applications with very low error budgets.

The LMP2021 is offered in 5-Pin SOT-23 and 8-Pin SOIC packages. The LMP2022 is offered in 8-Pin VSSOP and 8-Pin SOIC packages.