Datasheet AD8264 (Analog Devices) - 7

Data Sheet AD8264 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS M S 1 2 M LO EG A1 NH1 NH2 G IPP1 CO G G GN VPO VN OFS OFS V 0 9 8 7 6 5 4 3 2 1 4 3 3 3 3 3 3 3 3 3 IPN1 1 30 VOL1 OPP1 2 PIN1 29 VOH1 OPP2 3 INDICATOR 28 VOH2 IPN2 4 27 VOL2 IPP2 5 26 VGA2 AD8264 IPP3 6 25 VGA3 TOP VIEW IPN3 7 24 VOL3 (Not to Scale) OPP3 8 23 VOH3 OPP4 9 22 VOH4 IPN4 10 21 VOL4 1 1 12 13 14 15 16 17 18 19 20 M S 4 3 A4 M CM EG IPP4 NH4 NH3 G O G G VPO OFS OFS CO V VN V NOTES 1. EXPOSED PAD (PIN 0) NEEDS AN ELECTRICAL CONNECTION TO GROUND. FOR PROPER RF
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GROUNDING AND INCREASED RELIABILITY, THE PAD MUST BECONNECTED TO THE GROUND PLANE.
07736- 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, Negative Preamp Inputs for Channel 1 Through Channel 4. Normally, no external connection is needed. IPN3, IPN4 2, 3, 8, 9 OPP1, OPP2, Preamp Output for Channel 1 Through Channel 4. This pin is internally connected to the attenuator OPP3, OPP4 (VGA) input, and normally, no external connection is needed. 5, 6, 11, 40 IPP1, IPP2, Positive Preamp Input for Channel 1 Through Channel 4. High impedance. IPP3, IPP4 13, 14, 37, 38 GNH1, GNH2, Positive Gain Control Voltage Input for Channel 1 Through Channel 4. This pin is referenced to GNLO (Pin 36). GNH3, GNH4 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, Voltage sets the differential output offset for Channel 1 through Channel 4. This is the noninverting input OFS3, OFS4 to the differential amplifier, and it has the same bandwidth as the inverting input (VGAx). 20, 25, 26, 31 VGA4, VGA3 VGA Output for Channel 1 Through Channel 4. VGA2, VGA1 21, 24, 27, 30 VOL1, VOL2 Negative Differential Amplifier Output for Channel 1 Through Channel 4. VOL3, VOL4 22, 23, 28, 29 VOH1, VOH2, Positive Differential Amplifier Output for Channel 1 Through Channel 4. VOH3, VOH4 36 GNLO Negative Gain Control Input (Reference for GNHx Pins). Rev. C | Page 7 of 37 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS THEORY OF OPERATION OVERVIEW PREAMP VGA POST AMPLIFIER VOCM Pin OFSx Pins NOISE APPLICATIONS INFORMATION A LOW CHANNEL COUNT APPLICATION CONCEPT USING A DISCRETE REFERENCE A DC CONNECTED CONCEPT EXAMPLE EVALUATION BOARD CONNECTING AND USING THE AD8264-EVALZ OUTLINE DIMENSIONS ORDERING GUIDE