Datasheet
AD8264
Rev. A | Page 7 of 40
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
IPP2
OPP3
IPN3
IPP3
8
7
6
5
1
4
3
2
29
30
3132
28
34 33
27
COMM
IPP1
IPN2
IPN1
OPP1
OPP2
GNH1
GNH2
1413 171211 18
VOH3
VGA3
VOL3
15 16 20
37 35
19
VOH1
VNEG
GNLO
VOH2
21
22
23
24
VGA2
VOL2
VOL1
OFS1
PIN1
INDICATOR
AD8264
TOP VIEW
(Not to Scale)
VPOS
IPN4
OPP4
10
9
3839
OFS3
VOL4
VOH4
3640
25
26
OFS2
VGA1
VGA4
OFS4
VNEG
VPOS
VOCM
GNH3
GNH4
COMM
IPP4
NOTES
1. EXPOSED PADDLE (PIN 0) NEEDS AN ELECTRICAL
CONNECTION TO GROUND. FOR PROPER RF GROUNDING
AND INCREASED RELIABILITY, THE PAD MUST BE
CONNECTED TO THE GROUND PLANE.
07736-003
Figure 2. Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic Description
0 (EP), 12, 39 COMM Ground. Exposed paddle (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).