Data Sheet

AD8264

Rev. B | Page 7 of 40

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

NOTES

1. EXPOSED PAD (PIN 0) NEEDS AN ELECTRICAL

CONNECTION TO GROUND. FOR PROPER RF

GROUNDING AND INCREASED RELIABILITY, THE PAD

MUST BECONNECTED TO THE GROUND PLANE.

PIN1

INDICATOR

1

2

3

4

5

6

7

8

9

10

23

24

25

26

27

28

29

30

22

21

VOH3

VGA3

VOL3

VOH1

VOH2

VGA2

VOL2

VOL1

VOL4

VOH4

IPP2

OPP3

IPN3

IPP3

IPN2

IPN1

OPP1

OPP2

IPN4

OPP4

AD8264

TOP VIEW

(Not to Scale)

Figure 2. Pin Configuration

Table 4. Pin Function Descriptions

Pin No.

Mnemonic

Description

0 (EP), 12, 39

COMM

Ground. Exposed pad (EP, Pin 0) needs an electrical connection to ground. For proper RF grounding

and increased reliability, the pad must be connected to the ground plane.

1, 4, 7, 10

IPN1, IPN2,

IPN3, IPN4

Negative Preamp Inputs for Channel 1 Through Channel 4. Normally, no external connection is needed.

2, 3, 8, 9

OPP1, OPP2,

OPP3, OPP4

Preamp Output for Channel 1 Through Channel 4. This pin is internally connected to the attenuator

(VGA) input, and normally, no external connection is needed.

5, 6, 11, 40

IPP1, IPP2,

IPP3, IPP4

Positive Preamp Input for Channel 1 Through Channel 4. High impedance.

13, 14, 37, 38

GNH1, GNH2,

GNH3, GNH4

Positive Gain Control Voltage Input for Channel 1 Through Channel 4. This pin is referenced to GNLO (Pin 36).

15

VOCM

This pin sets the differential output amplifier (VOHx and VOLx) common-mode voltage.

16, 35

VPOS

Positive Supply (Internally Tied Together).

17, 34

VNEG

Negative Supply (Internally Tied Together).

18, 19, 32, 33

OFS1, OFS2,

OFS3, OFS4

Voltage sets the differential output offset for Channel 1 through Channel 4. This is the noninverting input

to the differential amplifier, and it has the same bandwidth as the inverting input (VGAx).

20, 25, 26, 31

VGA4, VGA3

VGA2, VGA1

VGA Output for Channel 1 Through Channel 4.

21, 24, 27, 30

VOL1, VOL2

VOL3, VOL4

Negative Differential Amplifier Output for Channel 1 Through Channel 4.

22, 23, 28, 29

VOH1, VOH2,

VOH3, VOH4

Positive Differential Amplifier Output for Channel 1 Through Channel 4.

36

GNLO

Negative Gain Control Input (Reference for GNHx Pins).