LTC1250 Very Low Noise Zero-Drift Bridge Amplifier

The LTC®1250 is a high performance, very low noise zerodrift operational amplifier. The LTC1250's combination of low front-end noise and DC precision makes it ideal for use with low impedance bridge transducers. The LTC1250 features typical input noise of 0.75µVP-P from 0.1Hz to 10Hz, and 0.2µVP-P from 0.1Hz to 1Hz. The LTC1250 has DC to 1Hz noise of 0.35µVP-P, surpassing that of low noise bipolar parts including the OP-07, OP-77, and LT1012. The LTC1250 uses the industry-standard single op amp pinout, and requires no external components or nulling signals, allowing it to be a plug-in replacement for bipolar op amps.

The LTC1250 incorporates an improved output stage capable of driving 4.3V into a 1k load with a single 5V supply; it will swing ±4.9V into 5k with ±5V supplies. The input common mode range includes ground with single power supply voltages above 12V. Supply current is 3mA with a ±5V supply, and overload recovery times from positive and negative saturation are 0.5ms and 1.5ms, respectively. The internal nulling clock is set at 5kHz for optimum low frequency noise and offset drift; no external connections are necessary.

The LTC1250 is available in a standard 8-pin plastic DIP and 8-pin SO packages.

Protected by U.S. Patents including 4933642

产品特点 Features
  • Very Low Noise: 0.75µVP-P Typ, 0.1Hz to 10Hz
  • DC to 1Hz Noise Lower Than OP-07
  • Full Output Swing into 1k Load
  • Offset Voltage: 10µV Max
  • Offset Voltage Drift: 50nV/oC Max
  • Common Mode Rejection Ratio: 110dB Min
  • Power Supply Rejection Ratio: 115dB Min
  • No External Components Required
  • Pin Compatible with Standard 8-Pin Op Amps
  • Available in Standard 8-Pin Plastic DIP and 8-Pin SO Packages
参数
LTC1250 参数
应用
  • Electronic Scales
  • Strain Gauge Amplifiers
  • Thermocouple Amplifiers
  • High Resolution Data Acquisition
  • Low Noise Transducers
  • Instrumentation Amplifiers
典型应用图
LTC1250 典型应用
LTC1250 订购信息和价格参考Package Variations and Pricing
器件型号 封装 引脚 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量) *
LTC1250CN8 PDIP 8 C $3.70  $2.85 
LTC1250CN8#PBF PDIP 8 C $3.70  $2.85 
LTC1250CS8 SO 8 C $4.20  $3.25 
LTC1250CS8#PBF SO 8 C $4.20  $3.25 
LTC1250CS8#TR SO 8 C $3.31 
LTC1250CS8#TRPBF SO 8 C $3.31 
LTC1250 数据手册及相关资料下载
  1. 数据手册(英文) : LTC1250 - Very Low Noise Zero-Drift Bridge Amplifier.PDF
  2. 应用指南 (英文) : AN86 - A Standards Lab Grade 20-Bit DAC with 0.1ppm/° Drift: The Dedicated Art of Digitizing One Part Per Million.PDF
  3. 可靠性数据 : R235 Reliability Data .PDF