AD7609

Data Sheet

Rev. A | Page 14 of 36

Pin No.

Type1

Mnemonic

Description

5, 4, 3

DI

OS [2:0]

Oversampling Mode Pins. Logic inputs. These inputs are used to select the oversampling ratio. OS 2 is

the MSB control bit, and OS 0 is the LSB control bit. See the Digital Filter section for additional details

on the oversampling mode of operation and Table 9 for oversampling bit decoding.

33

DO/DI

DB15

Parallel Output Data Bits, Data Bit 15. When PAR/SER SEL = 0, this pin acts as three-state parallel digital

output pin. This pin is used to output DB17 of the conversion result during the first RD pulse and DB1

of the same conversion result during the second RD pulse. When PAR/SER SEL = 1, this pin should be

tied to AGND.

32

DO/DI

DB14

Parallel Output Data Bits, Data Bit 14. When PAR/SER SEL = 0, this pin acts as three-state parallel digital

output pin. When CS and RD are low, this pin is used to output DB16 of the conversion result during

the first RD pulse and DB0 of the same conversion result during the second RD pulse. When PAR/SER

SEL = 1, this pin should be tied to AGND.

31 to 27

DO

DB[13:9]

Parallel Output Data Bits, Data Bit 13 to Data Bit 9. When PAR/SER SEL = 0, these pins act as three-state

parallel digital input/output pins. When CS and RD are low, these pins are used to output DB15 to

DB11 of the conversion result during the first RD pulse and output 0 during the second RD pulse.

When PAR/SER SEL = 1, these pins should be tied to AGND.

24

DO

pins acts as a three-state parallel digital input/output pin. When CS and RD are low, this pin is used to

serial conversion data. See the Conversion Control section for further details.

25

DO

pins acts as a three-state parallel digital input/output pin. When CS and RD are low, this pin is used to

serial conversion data. See the Conversion Control section for further details.

22 to 16

DO

DB[6:0]

Parallel Output Data Bits, Data Bit 6 to Data Bit 0. When PAR/SER SEL = 0, these pins act as three-state

parallel digital input/output pins. When CS and RD are low, these pins are used to output DB8 to DB2

of the conversion result during the first RD pulse and output 0 during the second RD pulse. When

PAR/SER SEL = 1, these pins should be tied to AGND.

1

Refers to classification of pin type; P denotes power, AI denotes analog input, REF denotes reference, DI denotes digital input, DO denotes digital output.