Datasheet > LMP7731_09

LMP7731_09

更新时间： 2024-11-22 11:37:23

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器
页数	文件大小	规格书
18页	716K
描述
2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier

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LMP7731_09 数据手册

May 20, 2009

LMP7731

2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier

General Description

Features

The LMP7731 is a single, low noise, rail-to-rail input and out-

put, 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.

(Typical values, T_A= 25°C, V_S= 5V)

Input voltage noise

■

f = 3 Hz

3.3 nV/√Hz

2.9 nV/√Hz

130 dB

—

f = 1 kHz

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 photom-

etry applications.

CMRR

■

Open loop gain

130 dB

22 MHz

2.4 V/µs

0.001%

GBW

Slew rate

THD @ f = 10 kHz, A_V= +1, R_L= 2 kΩ

Supply current per channel

Supply voltage range

Operating temperature range

Input bias current

RRIO

2.2 mA

The LMP7731 provides a wide GBW of 22 MHz while con-

suming only 2 mA of current. This high gain bandwidth along

with the high open loop gain of 130 dB enables accurate sig-

nal conditioning in applications with high closed loop gain

requirements.

1.8V to 5.5V

−40°C to 125°C

±1.5 nA

The LMP7731 has a supply voltage range of 1.8V to 5.5V,

making it an ideal choice for battery operated portable appli-

cations.

Applications

Gas analysis instruments

■

The LMP7731 is offered in the space saving 5-Pin SOT-23

and 8-Pin SOIC packages.

Photometric instrumentation

Medical instrumentation

■

Typical Performance Characteristics

Input Voltage Noise vs. Frequency

Input Current Noise vs. Frequency

20175261

20175262

LMP^®is a registered trademark of National Semiconductor Corporation.

201752

www.national.com

12 3 4 5 6 7...18

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