AFE4420

ACTIVO

AFE integrado ultrapequeño con FIFO para la monitorización óptica portátil de la frecuencia cardiaca

Detalles del producto

Applications Optical-HRM Number of input channels 4 Resolution (Bits) 22 Number of LEDs 4 Interface type I2C Operating temperature range (°C) -40 to 85 Rating Catalog
Applications Optical-HRM Number of input channels 4 Resolution (Bits) 22 Number of LEDs 4 Interface type I2C Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YZ) 30 4.8 mm² 2.4 x 2
  • Supports signal acquisition of up to 16 phases
  • Flexible allocation of LEDs and PDs in each phase
  • Accurate, continuous heart-rate monitoring:
    • Up to 100-dB dynamic range
    • Low current for continuous operation on a wearable device with a typical value
      • 15 µA for an LED, 20 µA for the receiver
  • Transmitter:
    • Supports common anode LED configuration
    • 8-Bit programmable LED current with range adjustable from 50 mA to 200 mA
    • Mode to fire two LEDs in parallel
    • Programmable LED on-time
    • Simultaneous support of 4 LEDs for optimized SpO2, HRM, or multi-wavelength HRM
    • Programmable control signals to extend operation to 8 LEDs using external SPDT switches
  • Receiver:
    • Supports 4 time-multiplexed photodiode inputs
    • Individual DC offset subtraction DAC at TIA input for each LED, ambient with 7-bit control and range up to ±254 µA
    • Transimpedance gain: 10 kΩ to 2 MΩ
    • Digital ambient subtraction at ADC output to suppress ambient tones
    • Noise filtering with programmable bandwidth
  • Supports external clock and internal oscillator modes
  • Automatic ambient cancellation mode (AACM) to increase receiver dynamic range
  • Two programmable GPIO pins with flexible interrupt generation
  • FIFO with 128-sample depth
  • I2C, SPI interfaces: selectable by pin
  • Operating temperature range: –40°C to +85°C
  • 2.6-mm × 2.1-mm DSBGA, 0.4-mm pitch
  • Supplies:
    • Rx:
      • 1.7 V to 1.9 V (LDO bypass)
      • 1.9 V to 3.6 V (LDO enabled)
    • Tx: 3 V to 5.5 V
    • IO: 1.7 V to RX_SUP
  • Supports signal acquisition of up to 16 phases
  • Flexible allocation of LEDs and PDs in each phase
  • Accurate, continuous heart-rate monitoring:
    • Up to 100-dB dynamic range
    • Low current for continuous operation on a wearable device with a typical value
      • 15 µA for an LED, 20 µA for the receiver
  • Transmitter:
    • Supports common anode LED configuration
    • 8-Bit programmable LED current with range adjustable from 50 mA to 200 mA
    • Mode to fire two LEDs in parallel
    • Programmable LED on-time
    • Simultaneous support of 4 LEDs for optimized SpO2, HRM, or multi-wavelength HRM
    • Programmable control signals to extend operation to 8 LEDs using external SPDT switches
  • Receiver:
    • Supports 4 time-multiplexed photodiode inputs
    • Individual DC offset subtraction DAC at TIA input for each LED, ambient with 7-bit control and range up to ±254 µA
    • Transimpedance gain: 10 kΩ to 2 MΩ
    • Digital ambient subtraction at ADC output to suppress ambient tones
    • Noise filtering with programmable bandwidth
  • Supports external clock and internal oscillator modes
  • Automatic ambient cancellation mode (AACM) to increase receiver dynamic range
  • Two programmable GPIO pins with flexible interrupt generation
  • FIFO with 128-sample depth
  • I2C, SPI interfaces: selectable by pin
  • Operating temperature range: –40°C to +85°C
  • 2.6-mm × 2.1-mm DSBGA, 0.4-mm pitch
  • Supplies:
    • Rx:
      • 1.7 V to 1.9 V (LDO bypass)
      • 1.9 V to 3.6 V (LDO enabled)
    • Tx: 3 V to 5.5 V
    • IO: 1.7 V to RX_SUP

The AFE4420 is an analog front-end for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2). The device supports up to four switching light-emitting diodes (LEDs) and up to four photodiodes. Up to 16 signal phases can be defined and the signal can be acquired from each phase in a synchronized manner and stored in a 128-sample First in, First out (FIFO) block. The FIFO can be read out using either an I2C or a SPI interface. The AFE also has a fully integrated LED driver with an 8-bit current control. The device has a high dynamic range transmit-and-receive circuitry that helps with the sensing of very small signal levels.

The AFE4420 is an analog front-end for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2). The device supports up to four switching light-emitting diodes (LEDs) and up to four photodiodes. Up to 16 signal phases can be defined and the signal can be acquired from each phase in a synchronized manner and stored in a 128-sample First in, First out (FIFO) block. The FIFO can be read out using either an I2C or a SPI interface. The AFE also has a fully integrated LED driver with an 8-bit current control. The device has a high dynamic range transmit-and-receive circuitry that helps with the sensing of very small signal levels.

Descargar Ver vídeo con transcripción Video
Más información

La hoja de datos completa y otros recursos de diseño están disponibles bajo un acuerdo de confidencialidad.Solicítelos ahora.

Productos similares que pueden interesarle

open-in-new Comparar alternativas
Misma funcionalidad con diferente configuración de pines que el dispositivo comparado
AFE44I30 ACTIVO Circuito frontal analógico (AFE) integrado de potencia ultrabaja para la detección biológica óptica Higher SNR, 6 LEDs, 4 PDs, and improved automatic ambient and LED cancellation.
AFE44S30 ACTIVO Circuito frontal analógico (AFE) integrado de potencia ultrabaja para detección biológica óptica por Higher SNR, 8 LEDs, 4 PDs, and improved automatic ambient and LED cancellation.

Documentación técnica

star =Principal documentación para este producto seleccionada por TI
No se encontraron resultados. Borre su búsqueda y vuelva a intentarlo.
Ver todo 3
Tipo Título Fecha
* Data sheet AFE4420 Ultra-Small, Integrated AFE With FIFO for Multi-sensor Wearable, Optical Heart-rate Monitoring and Bio-sensing datasheet (Rev. A) PDF | HTML 30 jul 2019
Technical article Designing compact, efficient and high performing multiparameter patient monitors PDF | HTML 25 jun 2019
Technical article Going beyond traditional SpO2 measurement with multiwavelength optical measurement PDF | HTML 12 feb 2019

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

AFE4420EVM — AFE integrado AFE4420 con FIFO para el módulo de evaluación de monitorización óptica portátil de la

El módulo de evaluación (EVM) AFE4420 es una plataforma para evaluar el dispositivo AFE4420, que es un circuito frontal analógico (AFE) para aplicaciones de biodetección óptica, como el monitor de la frecuencia cardíaca (HRM) y la saturación de oxígeno capilar periférico (SpO2). El AFE4420 admite (...)

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 (...)
Diseños de referencia

TIDA-010029 — Diseño de referencia de monitor portátil de frecuencia cardiaca (HRM) y SpO2 de varios sensores de 1

This reference design enables a wearable, optimized saturation of peripheral capillary oxygen (SpO2) and multi-sensor, multi-wavelength optical heart rate monitor (HRM). It uses AFE4420 device, which is a single-chip, bio-sensing front end for photoplethysmography (PPG) measurements. It supports up (...)
Design guide: PDF
Esquema: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
DSBGA (YZ) 30 Ultra Librarian

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

Los productos recomendados pueden tener parámetros, módulos de evaluación o diseños de referencia relacionados con este producto de TI.

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. ​​​​​​​​​​​​​​

Videos