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INA290 Ultra-Precise Current-Sense Amp

Texas Instruments' 2.7 V to 120 V, 1.1 MHz amp is available in a small SC-70 package

Image of Texas Instruments' INA290 Current-Sense AmpTexas Instruments' INA290 is an ultra-precise current-sense amp that can measure voltage drops across shunt resistors over a wide common-mode range of 2.7 V to 120 V. This amp is available in a highly space-efficient SC-70 package with a PCB footprint of 2.0 mm x 2.1 mm. The ultra-precise current measurement accuracy is achieved thanks to the combination of an ultra-low offset voltage of ±12 µV (maximum), a small gain error of ±0.1% (maximum), and a high DC CMRR of 160 dB (typical).

The INA290 is designed for DC measurement and high-speed applications (such as fast overcurrent protection) with high bandwidth of 1 MHz (at a gain of 20 V/V) and an 85 dB AC CMRR (at 50 kHz). The device operates from a single 2.7 V to 20 V supply and draws a 370 µA supply current (typical). The INA290 amp is available with five gain options including 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. The low offset of the zero-drift architecture enables current-sensing with low ohmic shunts as specified over the extended operating temperature range of -40°C to +125°C.

Features
  • Wide common-mode voltage:
    • Operational voltage: 2.7 V to 120 V
    • Survival voltage: -20 V to +122 V
  • Excellent CMRR:
    • 160 dB DC
    • 85 dB AC at 50 kHz
  • Accuracy:
    • Gain error: ±0.1% (max.)
    • Gain drift: ±5 ppm/°C (max.)
    • Offset voltage: ±12 µV (max.)
    • Offset drift: ±0.2 µV/°C (max.)
  • Available gains:
    • INA290A1: 20 V/V
    • INA290A2: 50 V/V
    • INA290A3: 100 V/V
    • INA290A4: 200 V/V
    • INA290A5: 500 V/V
  • High bandwidth: 1.1 MHz
  • Slew rate: 2 V/µs
  • Quiescent current: 370 µA
Applications
  • Active antenna system mMIMO (AAS)
  • Macro remote radio units (RRU)
  • 48 V rack servers
  • 48 V merchant networks and server power supplies
  • Test and measurement

INA290 Current-Sense Amp

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
INA290A1IDCKRINA290A1IDCKRINA290A1IDCKR2985 - Immediate
3000 - Factory Stock
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INA290A1IDCKTINA290A1IDCKTINA290A1IDCKT248 - Immediate
1250 - Factory Stock
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INA290A2IDCKRINA290A2IDCKRINA290A2IDCKR2941 - Immediate
4433 - Factory Stock
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INA290A2IDCKTINA290A2IDCKTINA290A2IDCKT198 - Immediate
2750 - Factory Stock
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INA290A3IDCKRINA290A3IDCKRINA290A3IDCKR2964 - Immediate
5093 - Factory Stock
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INA290A3IDCKTINA290A3IDCKTINA290A3IDCKT245 - Immediate
1000 - Factory Stock
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INA290A4IDCKRINA290A4IDCKRINA290A4IDCKR2950 - Immediate
3000 - Factory Stock
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INA290A4IDCKTINA290A4IDCKTINA290A4IDCKT250 - Immediate
1250 - Factory Stock
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INA290A5IDCKRINA290A5IDCKRINA290A5IDCKR2996 - Immediate
3000 - Factory Stock
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INA290A5IDCKTINA290A5IDCKTINA290A5IDCKT250 - Immediate
1750 - Factory Stock
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Published: 2020-08-12