Multimodal Sensor Front End
Data Sheet
ADPD4100/ADPD4101
FEATURES
GENERAL DESCRIPTION
Multimodal analog front end
8 input channels with multiple operation modes for various
sensor measurements
The ADPD4100/ADPD4101 operate as a complete multimodal
sensor front end, stimulating up to eight light emitting diodes
(LEDs) and measuring the return signal on up to eight separate
current inputs. Twelve time slots are available, enabling 12 separate
measurements per sampling period.
The data output and functional configuration utilize an I2C
interface on the ADPD4101 or a serial port interface (SPI) on
the ADPD4100. The control circuitry includes flexible LED
signaling and synchronous detection. The devices use a 1.8 V
analog core and 1.8 V/3.3 V compatible digital input/output (I/O).
Dual-channel processing with simultaneous sampling
12 programmable time slots for synchronized sensor
measurements
Flexible input multiplexing to support differential and
single-ended sensor measurements
8 LED drivers, 4 of which can be driven simultaneously
Flexible sampling rate from 0.004 Hz to 9 kHz using internal
oscillators
On-chip digital filtering
The analog front end (AFE) rejects signal offsets and corruption
from asynchronous modulated interference, typically from
ambient light, eliminating the need for optical filters or externally
controlled dc cancellation circuitry. Multiple operating modes
are provided, enabling the ADPD4100/ADPD4101 to be a sensor
hub for synchronous measurements of photodiodes, biopotential
electrodes, resistance, capacitance, and temperature sensors. The
multiple operation modes accommodate various sensor measure-
ments, including, but not limited to, photoplethysmography
(PPG), electrocardiography (ECG), electrodermal activity
(EDA), impedance, capacitance, temperature, gas detection,
smoke detection, and aerosol detection for various healthcare,
industrial, and consumer applications.
SNR of transmit and receive signal chain: 100 dB
AC ambient light rejection: 60 dB up to 1 kHz
400 mA total LED peak drive current
Total system power dissipation: 30 µW (combined LED and
AFE power), continuous PPG measurement at 75 dB SNR,
25 Hz ODR, 100 nA/mA CTR
SPI and I2C communications supported
512-byte FIFO size
APPLICATIONS
Wearable health and fitness monitors: heart rate monitors
(HRMs), heart rate variability (HRV), stress, blood pressure
estimation, SpO2, hydration, body composition
Industrial monitoring: CO, CO2, smoke, and aerosol detection
Home patient monitoring
The ADPD4100/ADPD4101 are available in a 3.11 mm ×
2.14 mm, 0.4 mm pitch, 33-ball WLCSP and 35-ball WLCSP.
FUNCTIONAL BLOCK DIAGRAM
AVDD
DVDD1
DVDD2
IOVDD
ADPD4100/ADPD4101
LED4B
LED3B
LED LEVEL
LED2B
LED1B
LED4A
LED3A
LED2A
LED1A
AND
MUX CONTROL
LED
AGND
DGND
IOGND
DRIVERS
HIGH
FREQUENCY
AND LOW
FREQUENCY
OSCILLATORS
CS
SCLK
MOSI
MISO
LGND
DIGITAL PROCESSING,
INTERFACE AND
INTEGRATOR
TIMING
TIMING CONTROL,
FIFO, PROGRAM AND
DATA REGISTERS,
COMMUNICATIONS
SCL
SDA
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
CH 1 SIGNAL
CONDITIONING
ADC
GPIO0
GPIO1
GPIO2
GPIO3
TIA_VREF
CH 2 SIGNAL
CONDITIONING
VREF
VC1
INTEGRATOR
TIMING
VC1
VC2
VOLTAGE
REFERENCES
VREF
VC2
TIA_VREF
NOTES
V
ICM
1. CS, SCLK, MOSI, AND MISO PINS ARE ON THE ADPD4100.
2. SCL AND SDA PINS ARE ON THE ADPD4101.
3. TIA_VREF IS THE INTERNAL VOLTAGE REFERENCE SIGNAL FOR THE TRANSIMPEDANCE AMPLIFIER.
Figure 1.
Rev. 0
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks are the propertyoftheir respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Technical Support
©2020 Analog Devices, Inc. All rights reserved.
www.analog.com
5秒后页面跳转
74HC04芯片引脚图及功能、应用电路图讲解
CR6842芯片参数、引脚配置、应用电路图详解
国产PoE供电芯片选型替代指南，你想要的都在这里！
LM2596可调稳压器引脚功能及电路原理图
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
