AFE4300

ACTIVO

Extremo frontal analógico (AFE) para la medición de peso y la composición corporal

Detalles del producto

Applications Body composition measurements for weight scales Number of input channels 2 Resolution (Bits) 16 Number of LEDs 0 Interface type SPI Operating temperature range (°C) 0 to 70 Rating Catalog
Applications Body composition measurements for weight scales Number of input channels 2 Resolution (Bits) 16 Number of LEDs 0 Interface type SPI Operating temperature range (°C) 0 to 70 Rating Catalog
LQFP (PN) 80 196 mm² 14 x 14
  • Weight-scale front-end:
    • Supports up to four load cell inputs
    • On-chip load cell 1.7-V excitation voltage for ratiometric measurement
    • 68-nVrms Input-Referred noise
      (0.1 Hz to 2 Hz)
    • Best-fit linearity: 0.01% of full-scale
    • Weight-scale measurement : 540 µA
  • Body composition front-end:
    • Supports up to three tetra-polar complex impedance measurements
    • 6-Bit, 1-MSPS sine-wave generation digital-to-analog converter (DAC)
    • 247.5-µArms, ±20% Excitation source
    • 0.1-Ω Measurement RMS noise in 2-Hz BW
    • Body composition measurement : 970 µA
  • Analog-to-digital converter (ADC):
    • 16 Bits, 860 SPS
    • Supply current: 110 µA
  • Weight-scale front-end:
    • Supports up to four load cell inputs
    • On-chip load cell 1.7-V excitation voltage for ratiometric measurement
    • 68-nVrms Input-Referred noise
      (0.1 Hz to 2 Hz)
    • Best-fit linearity: 0.01% of full-scale
    • Weight-scale measurement : 540 µA
  • Body composition front-end:
    • Supports up to three tetra-polar complex impedance measurements
    • 6-Bit, 1-MSPS sine-wave generation digital-to-analog converter (DAC)
    • 247.5-µArms, ±20% Excitation source
    • 0.1-Ω Measurement RMS noise in 2-Hz BW
    • Body composition measurement : 970 µA
  • Analog-to-digital converter (ADC):
    • 16 Bits, 860 SPS
    • Supply current: 110 µA

The AFE4300 is a low-cost analog front-end incorporating two separate signal chains: one chain for weight-scale (WS) measurement and the other for body composition measurement (BCM) analysis. A 16-bit, 860-SPS analog-to-digital converter (ADC) is multiplexed between both chains. The weight measurement chain includes an instrumentation amplifier (INA) with the gain set by an external resistor, followed by a 6-bit digital-to-analog converter (DAC) for offset correction, and a circuit to drive the external bridge/load cell with a fixed 1.7 V for ratiometric measurements.

The AFE4300 can also measure body composition by applying a sinusoidal current into the body. The sinusoidal current is generated with an internal pattern generator and a 6-bit, 1-MSPS DAC. A voltage-to-current converter applies this sinusoidal current into the body, between two terminals. The voltage created across these two terminals as a result of the impedance of the body is measured back with a differential amplifier, rectified, and the amplitude is extracted and measured by the 16-bit ADC.

The AFE4300 operates from 2 V to 3.6 V, is specified from 0°C to +70°C, and is available in a LQFP-80 package.

The AFE4300 is a low-cost analog front-end incorporating two separate signal chains: one chain for weight-scale (WS) measurement and the other for body composition measurement (BCM) analysis. A 16-bit, 860-SPS analog-to-digital converter (ADC) is multiplexed between both chains. The weight measurement chain includes an instrumentation amplifier (INA) with the gain set by an external resistor, followed by a 6-bit digital-to-analog converter (DAC) for offset correction, and a circuit to drive the external bridge/load cell with a fixed 1.7 V for ratiometric measurements.

The AFE4300 can also measure body composition by applying a sinusoidal current into the body. The sinusoidal current is generated with an internal pattern generator and a 6-bit, 1-MSPS DAC. A voltage-to-current converter applies this sinusoidal current into the body, between two terminals. The voltage created across these two terminals as a result of the impedance of the body is measured back with a differential amplifier, rectified, and the amplitude is extracted and measured by the 16-bit ADC.

The AFE4300 operates from 2 V to 3.6 V, is specified from 0°C to +70°C, and is available in a LQFP-80 package.

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Más información

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Documentación técnica

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Tipo Título Fecha
* Data sheet AFE4300 Low-Cost, Integrated Analog Front-End for Weight-Scale and Body Composition Measurement datasheet PDF | HTML 16 ago 2019
Application note Impedance Measurement with AFE4300 09 oct 2013
EVM User's guide AFE4300EVM-PDK User's Guide (Rev. A) 29 ago 2012

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

AFE4300EVM-PDK — Kit de demostración de rendimiento (PDK) AFE4300 para la medición de peso y la composición corporal

AFE4300EVM-PDK is a platform for evaluating the AFE4300 device. AFE4300 is a low cost Analog-Front-End incorporating two separate signal chains, one targeting weight measurement and the other targeting body composition analysis. The EVM provides access for load cell terminals to support up to four (...)

Guía del usuario: PDF
Firmware

SLAC681 AFE4300EVM-PDK Firmware Source v1.0

lock = Requiere aprobación de exportación (1 minuto)
Productos y hardware compatibles

Productos y hardware compatibles

Productos
AFE para biosensores
AFE4300 Extremo frontal analógico (AFE) para la medición de peso y la composición corporal
Desarrollo de hardware
Placa de evaluación
AFE4300EVM-PDK Kit de demostración de rendimiento (PDK) AFE4300 para la medición de peso y la composición corporal
Modelo de simulación

AFE4300PN IBIS Model

SBAM155.ZIP (19 KB) - IBIS Model
Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Paquete Pasadores Descargar
LQFP (PN) 80 Ver opciones

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

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