PGA855

ACTIVO

Amplificador de instrumentación de ruido bajo, ancho de banda amplio y salida totalmente diferencial

Detalles del producto

PGA/VGA PGA Number of channels 1 Vs (min) (V) 8 Vs (max) (V) 36 Input type Differential Output type Differential Vos (offset voltage at 25°C) (typ) (mV) 0.07 Input offset drift (±) (typ) (µV/°C) 0.3 Input voltage noise (typ) (µV√Hz) 0.0078 Interface type GPIO BW at Acl (MHz) 10 Acl, min spec gain (V/V) 0.125 Architecture Bipolar Features Fully Differential, Overvoltage protection, Super-beta Slew rate (typ) (V/µs) 35 Iq per channel (typ) (mA) 5.3 Gain (max) (dB) 24 Gain error (typ) (%) 0.02 Gain drift (max) (ppm/°C) 2 Rating Catalog Operating temperature range (°C) -40 to 125
PGA/VGA PGA Number of channels 1 Vs (min) (V) 8 Vs (max) (V) 36 Input type Differential Output type Differential Vos (offset voltage at 25°C) (typ) (mV) 0.07 Input offset drift (±) (typ) (µV/°C) 0.3 Input voltage noise (typ) (µV√Hz) 0.0078 Interface type GPIO BW at Acl (MHz) 10 Acl, min spec gain (V/V) 0.125 Architecture Bipolar Features Fully Differential, Overvoltage protection, Super-beta Slew rate (typ) (V/µs) 35 Iq per channel (typ) (mA) 5.3 Gain (max) (dB) 24 Gain error (typ) (%) 0.02 Gain drift (max) (ppm/°C) 2 Rating Catalog Operating temperature range (°C) -40 to 125
VQFN (RGT) 16 9 mm² 3 x 3
  • Eight pin-programmable binary gains
    • G (V/V) = ⅛, ¼, ½, 1, 2, 4, 8, and 16
  • Low gain error drift: 1 ppm/°C (max) at G = 1 V/V
  • Fully differential outputs
    • Independent output power-supply pins to allow for ADC input overdrive protection
    • Output common-mode control
  • Faster signal processing:
    • Wide bandwidth: 10 MHz at all gains
    • High slew rate: 35 V/µs
    • Settling time: 500 ns to 0.01%, 950 ns to 0.0015%
    • Input stage noise: 7.8 nV/√ Hz at G = 16 V/V
    • Filter option to achieve better SNR
  • Input overvoltage protection to ±40 V beyond supplies
  • Input-stage supply range:
    • Single supply: 8 V to 36 V
    • Dual supply: ±4 V to ±18 V
  • Output-stage supply range:
    • Single supply: 4.5 V to 36 V
    • Dual supply: ±2.25 V to ±18 V
  • Specified temperature range: ­–40°C to +125°C
  • Small package: 3-mm × 3-mm VQFN
  • Eight pin-programmable binary gains
    • G (V/V) = ⅛, ¼, ½, 1, 2, 4, 8, and 16
  • Low gain error drift: 1 ppm/°C (max) at G = 1 V/V
  • Fully differential outputs
    • Independent output power-supply pins to allow for ADC input overdrive protection
    • Output common-mode control
  • Faster signal processing:
    • Wide bandwidth: 10 MHz at all gains
    • High slew rate: 35 V/µs
    • Settling time: 500 ns to 0.01%, 950 ns to 0.0015%
    • Input stage noise: 7.8 nV/√ Hz at G = 16 V/V
    • Filter option to achieve better SNR
  • Input overvoltage protection to ±40 V beyond supplies
  • Input-stage supply range:
    • Single supply: 8 V to 36 V
    • Dual supply: ±4 V to ±18 V
  • Output-stage supply range:
    • Single supply: 4.5 V to 36 V
    • Dual supply: ±2.25 V to ±18 V
  • Specified temperature range: ­–40°C to +125°C
  • Small package: 3-mm × 3-mm VQFN

The PGA855 is a high-bandwidth programmable gain instrumentation amplifier with fully differential outputs. The PGA855 is equipped with eight binary gain settings, from an attenuating gain of 0.125 V/V to a maximum of 16 V/V, using three digital gain selection pins. The output common-mode voltage can be independently set using the VOCM pin.

The PGA855 architecture is optimized to drive inputs of high-resolution, precision analog-to-digital converters (ADCs) with sampling rates up to 1 MSPS without the need for an additional ADC driver. The output-stage power supplies (LVSS/LVDD) are decoupled from the input stage and can be connected to power supplies of the ADC to protect the ADC or downstream device against overdrive damage.

The super-beta input transistors offer an impressively low input bias current, which in turn provides a very low input current noise density of 0.3 pA/√ Hz, making the PGA855 a versatile choice for virtually any sensor type. The low-noise current-feedback front-end architecture offers excellent gain flatness, even at high frequencies, making the PGA855 an excellent high-impedance sensor readout device. Integrated protection circuitry on the input pins handles overvoltages up to ±40 V beyond the power-supply voltages.

The PGA855 is a high-bandwidth programmable gain instrumentation amplifier with fully differential outputs. The PGA855 is equipped with eight binary gain settings, from an attenuating gain of 0.125 V/V to a maximum of 16 V/V, using three digital gain selection pins. The output common-mode voltage can be independently set using the VOCM pin.

The PGA855 architecture is optimized to drive inputs of high-resolution, precision analog-to-digital converters (ADCs) with sampling rates up to 1 MSPS without the need for an additional ADC driver. The output-stage power supplies (LVSS/LVDD) are decoupled from the input stage and can be connected to power supplies of the ADC to protect the ADC or downstream device against overdrive damage.

The super-beta input transistors offer an impressively low input bias current, which in turn provides a very low input current noise density of 0.3 pA/√ Hz, making the PGA855 a versatile choice for virtually any sensor type. The low-noise current-feedback front-end architecture offers excellent gain flatness, even at high frequencies, making the PGA855 an excellent high-impedance sensor readout device. Integrated protection circuitry on the input pins handles overvoltages up to ±40 V beyond the power-supply voltages.

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Documentación técnica

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* Data sheet PGA855 Low-Noise, Wide-Bandwidth, Fully Differential Output Programmable-Gain Instrumentation Amplifier datasheet (Rev. B) PDF | HTML 27 sep 2023
Application brief Using TI ADCs for Noise, Vibration, and Harshness Measurements PDF | HTML 03 dic 2024
Application note Anti-Alias Filter Design for a 100kHz Bandwidth Data Acquisition Signal Chain PDF | HTML 02 dic 2024
Product overview PGA855 and PGA849 Product Overview (Rev. A) PDF | HTML 11 jul 2024
Application note Achieve High SNR with the PGA855, Fully Differential Programmable-Gain Amplifier PDF | HTML 21 mar 2024
EVM User's guide PGA855 Evaluation Module User's Guide (Rev. A) PDF | HTML 25 sep 2023
Product overview PLC Analog Input Front-End Architectures PDF | HTML 31 jul 2022

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.

Placa de evaluación

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Guía del usuario: PDF | HTML
Modelo de simulación

PGA855 PSpice Model

SBOMCF3.ZIP (1879 KB) - PSpice Model
Modelo de simulación

PGA855 TINA-TI Reference Design

SBOMCF5.TSC (223 KB) - TINA-TI Reference Design
Modelo de simulación

PGA855 TINA-TI Spice Model

SBOMCF4.ZIP (62 KB) - TINA-TI Spice Model
Herramienta de cálculo

PGA85X-INPUT-OUTPUT-RANGE-DESIGN-CALC PGA85x input and output range design calculator

PGA85X-INPUT-OUTPUT-RANGE-DESIGN-CALC
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Productos y hardware compatibles

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Diseños de referencia

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Design guide: PDF
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Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.

Si tiene preguntas sobre la calidad, el paquete o el pedido de productos de TI, consulte el soporte de TI. ​​​​​​​​​​​​​​

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