W55AD808 Datasheet | Nuvoton Technology

Description W55AD808, a low cost 8-bit ADC with 8 input channels. Each channel can be defined as digital or analog input mode independently. In analog input mode, this channel can accept an analog input range from 0V ~ VREF and convert it into a 10-bit digital data format (with 8-bit significant digits). W55AD808 provides a serial interface for host CPU to control it. Beside analog input mode, all input pins can be defined as digital input mode; host CPU can monitor them by the serial interface. 2 Features - Operating voltage: 2.7V ~ 5.5V. - Guarantee 8-bit A/D resolution. - 8 analog input channels. - Each channel can be independently programmed to a digital input mode. - 50KHz conversion rate. - 10-bit ADC with 8-bit significant digits. - Operation current: 0.5m A ~ 1m A. - Stand-by current: <0.5u A @ 4.5V. - Auto entry power-down mode. - Less external ponents. 3 Block Diagram A0~A 7 10 Bits ADC VREF INTERNAL REFERENCE VOLTAGE CONTROL LOGICAL POWER CMD_EN SCLK DATA VDD VSS AVD DAVS S Release Date:Oct. 2012 -2- Version A4.0 W55AD808 Data Sheet 4 W55AD808 Pad Description Symbol A0 A1 A2 A3 A4 A5 A6 A7 VSS VDD DATA SCLK CMD_EN AVDD AVSS VREF Pad No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 I/O I I I I I I I I Ground Power I/O I I Power Ground I Functional Description Digital or analog input path 0. Digital or analog input path 1. Digital or analog input path 2. Digital or analog input path 3. Digital or analog input path 4. Digital or analog input path 5. Digital or analog input path 6. Digital or analog input path 7. Digital ground return path. Digital power path. Data input or output for Serial interface munication. Shift clock for mand input and data input or output. mand enable for serial munication. Analog power path. Analog ground return path. External reference voltage for analog to digital conversion. 5 Electronic Characteristics Parameter...