Data Sheet

AD7607

Rev. C | Page 11 of 32

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

AD7607

TOP VIEW

(Not to Scale)

64 63 62

61

60 59 58

57 56 55 54 53 52 51 50 49

PIN 1

17 18

19

20

21 22 23

24 25 26

27 28 29 30 31 32

AGND

3

4

FRSTDATA

7

6

5

OS 2

2

8

9

10

12

13

14

15

16

11

DB0

BUSY

CONVST B

CONVST A

RANGE

RESET

RD/SCLK

CS

PAR/SER/BYTE SEL

OS 1

OS 0

STBY

DECOUPLING CAP PIN

DATA OUTPUT

POWER SUPPLY

ANALOG INPUT

GROUND PIN

DIGITAL OUTPUT

DIGITAL INPUT

REFERENCE INPUT/OUTPUT

DB15/BYTE SEL

REFIN/REFOUT

48

46

45

42

43

44

47

41

40

39

37

36

35

34

33

38

AGND

REFGND

REFCAPA

AGND

AGND

AGND

REFCAPB

REFGND

REGCAP

REGCAP

REF SELECT

Figure 8. Pin Configuration

Table 6. Pin Function Descriptions

Pin No.

Type1

Mnemonic

Description

1, 37, 38, 48

P

Analog Supply Voltage, 4.75 V to 5.25 V. This supply voltage is applied to the internal front-end

amplifiers and to the ADC core. These supply pins should be decoupled to AGND.

2, 26, 35, 40,

41, 47

P

AGND

Analog Ground. These pins are the ground reference points for all analog circuitry on the AD7607.

All analog input signals and external reference signals should be referred to these pins. All six of

these AGND pins should connect to the AGND plane of a system.

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 more

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

6

DI

PAR/SER/

BYTE SEL

Parallel/Serial/Byte Interface Selection Input. Logic input. If this pin is tied to a logic low, the parallel

interface is selected. If this pin is tied to a logic high, the serial interface is selected. Parallel byte

interface mode is selected when this pin is logic high and DB15/BYTE SEL is logic high (see Table 8).

DB[6:0] pins should be tied to ground.

In byte mode, DB15, in conjunction with PAR/SER/BYTE SEL, is used to select the parallel byte mode

of operation (see Table 8). DB14 is used as the HBEN pin. DB[7:0] transfer the 16-bit conversion

results in two RD operations, with DB0 as the LSB of the data transfers.

7

DI

STBY

Standby Mode Input. This pin is used to place the AD7607 into one of two power-down modes:

standby mode or shutdown mode. The power-down mode entered depends on the state of the

RANGE pin, as shown in Table 7. When in standby mode, all circuitry, except the on-chip reference,

regulators, and regulator buffers, is powered down. When in shutdown mode, all circuitry is powered

down.

8

DI

RANGE

Analog Input Range Selection. Logic input. The polarity on this pin determines the input range

of the analog input channels. If this pin is tied to a logic high, the analog input range is ±10 V for all

channels. If this pin is tied to a logic low, the analog input range is ±5 V for all channels. A logic

change on this pin has an immediate effect on the analog input range. Changing this pin during

a conversion is not recommended. See the Analog Input section for more information.