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AS7050

General Description

Short Datasheet

• PUBLIC

DS001051

• v1-00 • 2022-Mar-31

│ 5

1.3

Block Diagram

The functional blocks of this device are shown below:

Figure 2 :

Functional Blocks of AS7050

SELECTION

Reference

Block

EXTCLK

PD3

ECG

Amplifier

PD4

PD5

PD6

Offset

PPG - ADC

Current Input

TIA

PDREF

ECG_INP

ECG_INN

ECG_REF

Leads off

detect

Leakage

compens

ation

ECG_REF

AMP

ECG_Amplifier Block

LED

Driver 2x

LED1

LED2

LED3

PGND

LED4

LED5

LED6

ECG - ADC

Voltage Input

ECG

ADC

INPUT

SELECTION

SCL

SDA_MOSI

MISO

CSXN

INT

LDO

Analog Supply

(1.8V)

Digital Supply

(1.8V)

POR

OSC

10 BIT

DAC

AFE

IN /

OUT

SELEC

TION

Analog Front End (AFE)

Clock

Source

Selection

VDDIO

1.8V

3.3V

VLED

from/ to µC

to µC

1µ

2x10M

2µ

10µ

2µ

1µ

AS7050

PD1

PD2

LED7_GPIO1

LED8_GPIO2

VLED

GPIO1, GPIO2

PPG

Filter

FIFO

1.5kByte

I2C / SPI

Interface

Over-

sampling

Over-

sampling

Sequencer

CONFIG

TIA

CONFIG

REF

CONFIG

ECG

CONFIG

DIGITAL

CONFIG

TEMP

CONFIG

PPG

CONFIG

AFE

RAM

Filter

Interrupt

Logic

Clock/Reset

Logic

Config

LED

OTP

Digital

ECG

Filter

Config

Synchro-

nisation

I/O

Control

Over-

sampling

19 Bit

24 Bit

Automatic

Offset

Control

Automatic

Offset

Control

8 Bit

DAC

8 Bit

DAC

Offset

IFSEL

Over-

sampling 1

Notch

Filter

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