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RT1025WS Datasheet(PDF) 3 Page - Richtek Technology Corporation |
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RT1025WS Datasheet(HTML) 3 Page - Richtek Technology Corporation |
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3 / 24 page  RT1025 Copyright © 2022 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation DS1025-01 July 2022 www.richtek.com 3 Typical Application Circuit Using RT1025 for ECG/PPG Sensing RT1025 GND_D AVDD28 AVDD_HV GND_HV VRLD INP_ECG ECG Electrode INN_ECG INP_PPG INN_PPG TX1 TX2 Boost GND_A DVDDIO DVDD18 2.8V 2.8V 1.8V to 3.6V 1.8V XTALI 32kHz / NC RESETB RESETB AFE_PWD AFEPWD I2C / SPI I2C / SPI INT INT MCU 2.2µF 2.2µF 2.2µF 1µF VBG 2.2µF VRLD VLX 1k G7 F7 E7 G5 H6 H2 H1 H4 G3, G6, H3 D1, G1, G2 C3, C5, D2 E1 C1 H7 A5 A4 B7 A1 B6 B4 B1 Functional Pin Description Pin No. Pin Name Type Pin Function A1 RESETB DIO Reset pin. Can be connected to an external MCU. A2 SPI_CSN = SDA DIO (1) SPI mode : SPI data pin. (SPI_CSN) (2) I2C mode : I2C data pin. (I2C_SDA) A3 SPI_CLK = SCL DIO (1) SPI mode : SPI clock pin. (SPI_CLK) (2) I2C mode : I2C clock pin. (I2C_SCL) A4 DVDDIO P Digital IO supply. 2.2 µF decoupling capacitor to ground. A5 DVDD18 P Digital supply. 2.2 µF decoupling capacitor to ground. A6 GND DIO Tied to ground. A7 XTALO AIO Crystal oscillator pins. Connect an external 32kHz crystal with 22pF decoupling capacitor. If with external clock source, leave floating. B1 INT DO Interrupt pin. Can be connected to an external MCU. B2, B5, C2, C6, D6, D7 RSV DIO Reserve for testing. (leave floating) B3 SPI_MISO DIO SPI serial out master in. B4 I2C_SEL DIO (1) SPI mode : please keep I2C_SEL low. (2) I2C mode : please keep I2C_SEL high. B6 AFE_PWD DIO Power down pin. Can be connected to an external MCU B7 XTALI AIO Crystal oscillator pins. Connect an external 32kHz crystal with 22pF decoupling capacitor. It can be connected to an external 32kHz clock source. C1 AVDD_HV P PPG LED driver power. 2.2 µF decoupling capacitor to ground. |
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