AD7173-8 Analog-to-Digital Converter
Multichannel sigma-delta ADC with 16 analog inputs, cross point mux, internal 2.5 V reference, serial interface (SCLK, DIN, DOUT/RDY, ~CS), AVDD1/AVDD2/IOVDD supplies, exposed pad to AVSS.
Aliase:AD7173-8
LFCSP-40 Top View
41 Pins
Pin-Tabelle41
| Pin | Signal / Name | Typ | Alternative Funktionen |
|---|---|---|---|
| 1 | AIN16 | Analog | Analog Input 16 (cross point mux) |
| 2 | AIN0/REF2- | Analog | Analog Input 0 (cross point mux)Reference 2 negative input (REF2-) |
| 3 | AIN1/REF2+ | Analog | Analog Input 1 (cross point mux)Reference 2 positive input (REF2+) |
| 4 | AIN2 | Analog | Analog Input 2 (cross point mux) |
| 5 | AIN3 | Analog | Analog Input 3 (cross point mux) |
| 6 | REFOUT | Analog | Buffered internal reference output, 2.5 V vs AVSS |
| 7 | REGCAPA | Analog | Analog LDO regulator output, decouple 1 uF to AVSS |
| 8 | AVSS | Power | Negative analog supply, nominal 0 V |
| 9 | AVDD1 | Power | Analog supply 1, 3.0 V to 5.5 V |
| 10 | AVDD2 | Power | Analog supply 2, 2 V to AVDD1 |
| 11 | PDSW | Analog | Power-down switch to AVSS (PDSW bit in GPIOCON) |
| 12 | XTAL1 | Analog | Crystal input 1 |
| 13 | XTAL2/CLKIO | Digital | Crystal input 2 (XTAL2)Clock input or output (CLKIO) |
| 14 | DOUT/~RDY | Digital | Serial data output (DOUT)Data ready output (~RDY), low when conversion done |
| 15 | DIN | Digital | Serial data input to shift register |
| 16 | SCLK | Digital | Serial clock input, Schmitt trigger |
| 17 | ~CS | Digital | Chip select input, active low |
| 18 | ~ERROR | Digital | Active-low error input or open-drain error outputGeneral-purpose output mode (ERR_DAT bit) |
| 19 | SYNC | Digital | Synchronization input for digital filters and modulators |
| 20 | IOVDD | Power | Digital I/O supply, 2 V to 5 V |
| 21 | DGND | Ground | Digital ground |
| 22 | REGCAPD | Analog | Digital LDO regulator output, decouple 1 uF to DGND |
| 23 | GPIO0 | Digital | General-purpose I/O, referred to AVDD1 and AVSS |
| 24 | GPIO1 | Digital | General-purpose I/O, referred to AVDD1 and AVSS |
| 25 | GPO2 | Digital | General-purpose output, referred to AVDD1 and AVSS |
| 26 | AIN4 | Analog | Analog Input 4 (cross point mux) |
| 27 | AIN5 | Analog | Analog Input 5 (cross point mux) |
| 28 | AIN6 | Analog | Analog Input 6 (cross point mux) |
| 29 | AIN7 | Analog | Analog Input 7 (cross point mux) |
| 30 | AIN8 | Analog | Analog Input 8 (cross point mux) |
| 31 | AIN9 | Analog | Analog Input 9 (cross point mux) |
| 32 | AIN10 | Analog | Analog Input 10 (cross point mux) |
| 33 | AIN11 | Analog | Analog Input 11 (cross point mux) |
| 34 | AIN12 | Analog | Analog Input 12 (cross point mux) |
| 35 | AIN13 | Analog | Analog Input 13 (cross point mux) |
| 36 | AIN14 | Analog | Analog Input 14 (cross point mux) |
| 37 | AIN15 | Analog | Analog Input 15 (cross point mux) |
| 38 | GPO3 | Digital | General-purpose output, referred to AVDD1 and AVSS |
| 39 | REF- | Analog | Reference 1 negative input |
| 40 | REF+ | Analog | Reference 1 positive input |
| EP | EP | Power | Exposed pad, solder to PCB and connect to AVSS |