產品詳細資料

Number of channels 1 Vs (min) (V) 4 Vs (max) (V) 36 CMRR (min) (dB) 90 Common-mode input low (min) (V) -275 Common-mode input high (max) (V) 275 Input offset (±) (max) (V) 0.0011 Iq (typ) (mA) 0.81 Slew rate (typ) (V/µs) 5 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 1 Small-signal bandwidth (typ) (Hz) 500000 Rating Catalog Operating temperature range (°C) -40 to 125 Gain drift (max) (ppm/°C) 10 Gain error (±) (max) (%) 0.02
Number of channels 1 Vs (min) (V) 4 Vs (max) (V) 36 CMRR (min) (dB) 90 Common-mode input low (min) (V) -275 Common-mode input high (max) (V) 275 Input offset (±) (max) (V) 0.0011 Iq (typ) (mA) 0.81 Slew rate (typ) (V/µs) 5 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 1 Small-signal bandwidth (typ) (Hz) 500000 Rating Catalog Operating temperature range (°C) -40 to 125 Gain drift (max) (ppm/°C) 10 Gain error (±) (max) (%) 0.02
SOIC (D) 8 29.4 mm² 4.9 x 6
  • Common-Mode Voltage Range: ±275 V
  • Minimum CMRR: 90 dB from –40°C to +125°C
  • DC Specifications:
    • Maximum Offset Voltage: 1100 µV
    • Maximum Offset Voltage Drift: 15 µV/°C
    • Maximum Gain Error: 0.02%
    • Maximum Gain Error Drift: 10 ppm/°C
    • Maximum Gain Nonlinearity: 0.001% FSR
  • AC Performance:
    • Bandwidth: 500 kHz
    • Typical Slew Rate: 5 V/µs
  • Wide Supply Range: ±2.0 V to ±18 V
    • Maximum Quiescent Current: 900 µA
    • Output Swing on ±15-V Supplies: ±13.5 V
  • Input Protection:
    • Common-Mode: ±500 V
    • Differential: ±500 V
  • Common-Mode Voltage Range: ±275 V
  • Minimum CMRR: 90 dB from –40°C to +125°C
  • DC Specifications:
    • Maximum Offset Voltage: 1100 µV
    • Maximum Offset Voltage Drift: 15 µV/°C
    • Maximum Gain Error: 0.02%
    • Maximum Gain Error Drift: 10 ppm/°C
    • Maximum Gain Nonlinearity: 0.001% FSR
  • AC Performance:
    • Bandwidth: 500 kHz
    • Typical Slew Rate: 5 V/µs
  • Wide Supply Range: ±2.0 V to ±18 V
    • Maximum Quiescent Current: 900 µA
    • Output Swing on ±15-V Supplies: ±13.5 V
  • Input Protection:
    • Common-Mode: ±500 V
    • Differential: ±500 V

The INA149 is a precision unity-gain difference amplifier with a very high input common-mode voltage range. It is a single, monolithic device that consists of a precision op amp and an integrated thin-film resistor network. The INA149 can accurately measure small differential voltages in the presence of common-mode signals up to ±275 V. The INA149 inputs are protected from momentary common-mode or differential overloads of up to 500 V.

In many applications, where galvanic isolation in not required, the INA149 can replace isolation amplifiers. This ability can eliminate costly isolated input side power supplies and the associated ripple, noise, and quiescent current. The excellent 0.0005% nonlinearity and 500-kHz bandwidth of the INA149 are superior to those of conventional isolation amplifiers.

The INA149 is pin-compatible with the INA117 and INA148 type high common-mode voltage amplifiers and offers improved performance over both devices. The INA149 is available in the SOIC-8 package with operation specified over the extended industrial temperature range of –40°C to +125°C.

The INA149 is a precision unity-gain difference amplifier with a very high input common-mode voltage range. It is a single, monolithic device that consists of a precision op amp and an integrated thin-film resistor network. The INA149 can accurately measure small differential voltages in the presence of common-mode signals up to ±275 V. The INA149 inputs are protected from momentary common-mode or differential overloads of up to 500 V.

In many applications, where galvanic isolation in not required, the INA149 can replace isolation amplifiers. This ability can eliminate costly isolated input side power supplies and the associated ripple, noise, and quiescent current. The excellent 0.0005% nonlinearity and 500-kHz bandwidth of the INA149 are superior to those of conventional isolation amplifiers.

The INA149 is pin-compatible with the INA117 and INA148 type high common-mode voltage amplifiers and offers improved performance over both devices. The INA149 is available in the SOIC-8 package with operation specified over the extended industrial temperature range of –40°C to +125°C.

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重要文件 類型 標題 格式選項 日期
* Data sheet High Common Mode Voltage Difference Amplifier datasheet (Rev. B) 2012年 7月 30日
Circuit design High common-mode differential input voltage to ±10-V ADC input circuit (Rev. A) PDF | HTML 2024年 9月 24日
E-book An Engineer's Guide to Current Sensing (Rev. B) 2022年 4月 12日
E-book Tips and tricks for designing with voltage references (Rev. A) 2021年 5月 7日
Application brief How to Select Precision Amplifiers for Semiconductor Testers (Rev. A) PDF | HTML 2020年 12月 3日
E-book The Signal e-book: A compendium of blog posts on op amp design topics 2017年 3月 28日
More literature A High-Voltage Bidirectional Current Source 2013年 12月 19日

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