AD604

Rev. D | Page 6 of 32

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

VGN1

24

VREF

23

OUT1

22

GND1

21

VPOS

20

VNEG

19

VNEG

18

VPOS

17

GND2

16

OUT2

15

VOCM

14

VGN2

13

AD604

TOP VIEW

(Not to Scale)

Figure 2. Pin Configuration

Table 3. Pin Function Descriptions

Pin

No.

Mnemonic

Description

1

–DSX1

Channel 1 Negative Signal Input to DSX1.

2

+DSX1

Channel 1 Positive Signal Input to DSX1.

3

PAO1

Channel 1 Preamplifier Output.

4

FBK1

Channel 1 Preamplifier Feedback Pin.

5

PAI1

Channel 1 Preamplifier Positive Input.

6

COM1

Channel 1 Signal Ground. When connected to positive supply, Preamplifier 1 shuts down.

7

COM2

Channel 2 Signal Ground. When connected to positive supply, Preamplifier 2 shuts down.

8

PAI2

Channel 2 Preamplifier Positive Input.

9

FBK2

Channel 2 Preamplifier Feedback Pin.

10

PAO2

Channel 2 Preamplifier Output.

11

+DSX2

Channel 2 Positive Signal Input to DSX2.

12

–DSX2

Channel 2 Negative Signal Input to DSX2.

13

VGN2

Channel 2 Gain Control Input and Power-Down Pin. If grounded, device is off; otherwise, positive voltage increases gain.

14

VOCM

Input to this pin defines the common mode of the output at OUT1 and OUT2.

15

OUT2

Channel 2 Signal Output.

16

GND2

Ground.

17

VPOS

Positive Supply.

18

VNEG

Negative Supply.

19

VNEG

Negative Supply.

20

VPOS

Positive Supply.

21

GND1

Ground.

22

OUT1

Channel 1 Signal Output.

23

VREF

Input to this pin sets gain scaling for both channels to 2.5 V = 20 dB/V and 1.67 V = 30 dB/V.

24

VGN1

Channel 1 Gain Control Input and Power-Down Pin. If grounded, the device is off; otherwise, positive voltage increases gain.