型号LMP7731
品牌
分类精密运算放大器 (Vos<1mV)
描述单通道 2.9nV/sqrt(Hz) 低噪声精密 RRIO 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) 1.8
Vos (offset voltage at 25°C) (max) (mV) 0.5
GBW (typ) (MHz) 22
Slew rate (typ) (V/µs) 2.4
Rail-to-rail In, Out
Offset drift (typ) (µV/°C) 0.5
Iq per channel (typ) (mA) 2.2
Vn at 1 kHz (typ) (nV√Hz) 2.9
CMRR (typ) (dB) 120
Rating Catalog
Operating temperature range (°C) -40 to 125
Input bias current (max) (pA) 30000
Iout (typ) (A) 0.047
Architecture Bipolar
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) 0.009
Output swing headroom (to positive supply) (typ) (V) -0.008
THD + N at 1 kHz (typ) (%) 0.001

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 = 5V)

  • Input Voltage Noise
    • f = 3 Hz 3.3 nV/√Hz
    • f = 1 kHz 2.9 nV/√Hz
  • CMRR 130 dB
  • Open Loop Gain 130 dB
  • GBW 22 MHz
  • Slew Rate 2.4 V/µs
  • THD @ f = 10 kHz, AV = +1, RL = 2 kΩ 0.001%
  • Supply Current per Channel 2.2 mA
  • Supply Voltage Range 1.8V to 5.5V
  • Operating Temperature Range −40°C to 125°C
  • Input Bias Current ±1.5 nA
  • RRIO

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说明

The LMP7731 is a single, low noise, rail-to-rail input and output, low voltage amplifier. The LMP7731 is part of the LMP precision amplifier family and is ideal for precision and low noise applications with low voltage requirements.

This operational amplifier offers low voltage noise of 2.9 nV/√Hz with a 1/f corner of only 3 Hz. The LMP7731 has bipolar input stages with a bias current of only 1.5 nA. This low input bias current, complemented by the very low level of voltage noise, makes the LMP7731 an excellent choice for photometry applications.

The LMP7731 provides a wide GBW of 22 MHz while consuming only 2 mA of current. This high gain bandwidth along with the high open loop gain of 130 dB enables accurate signal conditioning in applications with high closed loop gain requirements.

The LMP7731 has a supply voltage range of 1.8V to 5.5V, making it an ideal choice for battery operated portable applications.

The LMP7731 is offered in the space saving 5-Pin SOT-23 and 8-Pin SOIC packages.