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INA331

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Amplificador de instrumentación CMOS de alimentación única y baja potencia

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INA331

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Detalles del producto

Number of channels 1 Vs (max) (V) 5.5 Vs (min) (V) 2.5 Input offset (±) (max) (µV) 500 Voltage gain (min) (V/V) 5 Voltage gain (max) (V/V) 1000 Noise at 1 kHz (typ) (nV√Hz) 46 Features Cost Optimized, Shutdown CMRR (min) (dB) 90 Input bias current (±) (max) (nA) 0.01 Iq (typ) (mA) 0.415 Bandwidth at min gain (typ) (MHz) 2 Gain error (±) (max) (%) 0.1 Operating temperature range (°C) -55 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.01 Output swing headroom (to negative supply) (typ) (V) 0.025 Output swing headroom (to positive supply) (typ) (V) -0.025 Input common mode headroom (to negative supply) (typ) (V) 0.55 Input common mode headroom (to positive supply) (typ) (V) -1.7 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 7
Number of channels 1 Vs (max) (V) 5.5 Vs (min) (V) 2.5 Input offset (±) (max) (µV) 500 Voltage gain (min) (V/V) 5 Voltage gain (max) (V/V) 1000 Noise at 1 kHz (typ) (nV√Hz) 46 Features Cost Optimized, Shutdown CMRR (min) (dB) 90 Input bias current (±) (max) (nA) 0.01 Iq (typ) (mA) 0.415 Bandwidth at min gain (typ) (MHz) 2 Gain error (±) (max) (%) 0.1 Operating temperature range (°C) -55 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.01 Output swing headroom (to negative supply) (typ) (V) 0.025 Output swing headroom (to positive supply) (typ) (V) -0.025 Input common mode headroom (to negative supply) (typ) (V) 0.55 Input common mode headroom (to positive supply) (typ) (V) -1.7 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 7
VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • DESIGNED FOR LOW COST
  • HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°C
  • GAIN SET WITH EXT. RESISTORS FOR >5V/V
  • LOW OFFSET VOLTAGE: ±250 µV
  • HIGH CMRR: 94dB DC, 50dB at 45kHz
  • LOW BIAS CURRENT: 0.5pA
  • BANDWIDTH, SLEW RATE: 2.0MHz, 5V/µs
  • RAIL-TO-RAIL OUTPUT SWING: (V+)– 0.02V
  • WIDE TEMPERATURE RANGE: –55°C to +125°C
  • LOW QUIESCENT CURRENT: 490 µA max/chan
  • SHUT DOWN: 0.01 µA
  • MSOP-8 SINGLE AND TSSOP-14 DUAL PACKAGES
  • APPLICATIONS
    • INDUSTRIAL SENSOR AMPLIFIERS:
        Bridge, RTD, Thermocouple, Position
    • PHYSIOLOGICAL AMPLIFIERS:
        ECG, EEG, EMG
    • A/D CONVERTER SIGNAL CONDITIONING
    • DIFFERENTIAL LINE RECEIVERS WITH GAIN
    • FIELD UTILITY METERS
    • PCMCIA CARDS
    • AUDIO AMPLIFIERS
    • COMMUNICATION SYSTEMS
    • TEST EQUIPMENT
    • AUTOMOTIVE INSTRUMENTATION

All trademarks are the property of their respective owners.
  • DESIGNED FOR LOW COST
  • HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°C
  • GAIN SET WITH EXT. RESISTORS FOR >5V/V
  • LOW OFFSET VOLTAGE: ±250 µV
  • HIGH CMRR: 94dB DC, 50dB at 45kHz
  • LOW BIAS CURRENT: 0.5pA
  • BANDWIDTH, SLEW RATE: 2.0MHz, 5V/µs
  • RAIL-TO-RAIL OUTPUT SWING: (V+)– 0.02V
  • WIDE TEMPERATURE RANGE: –55°C to +125°C
  • LOW QUIESCENT CURRENT: 490 µA max/chan
  • SHUT DOWN: 0.01 µA
  • MSOP-8 SINGLE AND TSSOP-14 DUAL PACKAGES
  • APPLICATIONS
    • INDUSTRIAL SENSOR AMPLIFIERS:
        Bridge, RTD, Thermocouple, Position
    • PHYSIOLOGICAL AMPLIFIERS:
        ECG, EEG, EMG
    • A/D CONVERTER SIGNAL CONDITIONING
    • DIFFERENTIAL LINE RECEIVERS WITH GAIN
    • FIELD UTILITY METERS
    • PCMCIA CARDS
    • AUDIO AMPLIFIERS
    • COMMUNICATION SYSTEMS
    • TEST EQUIPMENT
    • AUTOMOTIVE INSTRUMENTATION

All trademarks are the property of their respective owners.

The INA331 and INA2331 are rail-to-rail output, low-power CMOS instrumentation amplifiers that offer wide range, single-supply operation as well as bipolar-supply operation. The INA331 family provides low-cost, low-noise amplification of differential signals with a low quiescent current of 415µA (dropping to 0.01µA when shutdown). Returning to normal operation within microseconds, this INA can be used for battery or multi-channel applications.

Configured internally in a gain of 5V/V, the INA331 offers flexibility in higher gains by choosing external resistors.

The INA331 rejects line noise and its harmonics, because common-mode error remains low even at higher frequencies.

High bandwidth and slew rate makes the INA331 ideal for directly driving sampling Analog-to-Digital (A/D) converters as well as general-purpose applications.

With high precision, low cost, and small packages, the INA331 outperforms discrete designs. They are specified for a wide temperature range of -55°C to +125°C.

The INA331 and INA2331 are rail-to-rail output, low-power CMOS instrumentation amplifiers that offer wide range, single-supply operation as well as bipolar-supply operation. The INA331 family provides low-cost, low-noise amplification of differential signals with a low quiescent current of 415µA (dropping to 0.01µA when shutdown). Returning to normal operation within microseconds, this INA can be used for battery or multi-channel applications.

Configured internally in a gain of 5V/V, the INA331 offers flexibility in higher gains by choosing external resistors.

The INA331 rejects line noise and its harmonics, because common-mode error remains low even at higher frequencies.

High bandwidth and slew rate makes the INA331 ideal for directly driving sampling Analog-to-Digital (A/D) converters as well as general-purpose applications.

With high precision, low cost, and small packages, the INA331 outperforms discrete designs. They are specified for a wide temperature range of -55°C to +125°C.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos Low-Power, Single-Supply, CMOS Instrumentation Amplifiers datasheet (Rev. C) 4/04/2005
Nota sobre la aplicación Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps PDF | HTML 27/07/2021
Libro electrónico An Engineer’s Guide to Designing with Precision Amplifiers 29/04/2021
Libro electrónico The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML 28/03/2017
Analog Design Journal Linear operating region of two-op-amp instrumentation amplifiers with gain stage 21/07/2016

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Modelo de simulación

INA331 PSpice Model (Rev. B)

SBOC014B.ZIP (28 KB) - Modelo PSpice
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INA331 TINA-TI Reference Design (Rev. B)

SBOC173B.TSC (93 KB) - Diseño de referencia TINA-TI
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INA331 TINA-TI Spice Model (Rev. A)

SBOM252A.ZIP (9 KB) - Modelo TINA-TI Spice
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