Datasheet AD8335 (Analog Devices) - 6

AD8335 Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 1 1 1 1 1 1 2 2 2 P1 N P1 P1 N M N M N M 12 12 12 PMD PI VPP1 PO PO VI VI CO VG VC VG VC EN SP1 SL HL 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 PMD2 1 PIN 1 48 GND1 IDENTIFIER PIP2 2 47 VOH1 VPP2 3 46 VOL1 PON2 4 45 VPV1 POP2 5 44 VPV2 VIP2 6 43 VOL2 VIN2 7 42 VOH2 AD8335 COM2 8 41 GND2 COM3 9 TOP VIEW 40 GND3 VIN3 10 (Not to Scale) 39 VOH3 VIP3 11 38 VOL3 POP3 12 37 VPV3 PON3 13 36 VPV4 VPP3 14 35 VOL4 PIP3 15 34 VOH4 PMD3 16 33 GND4 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 4 4 4 4 P4 N4 P4 P4 N M N4 M4 N3 M3 34 34 34 PI VI VI PMD VPP4 PO PO CO VG VC VG VC EN SP3 SL HL NOTES
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1. THE EXPOSED PADDLE MUST BE SOLDERED TO THE PCB GROUND
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TO ENSURE PROPER HEAT DISSIPATION, NOISE, AND MECHANICAL
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STRENGTH BENEFITS.
04 Figure 2. Pin Configuration
Table 3. Pin Function Descriptions Pin No. Mnemonic Description Pin No. Mnemonic Description
1 PMD2 Preamp Input Common—CH2 35 VOL4 VGA Output Negative—CH4 2 PIP2 Preamp Input—CH2 36 VPV4 Positive Supply VGA—CH4 3 VPP2 Positive Supply Preamp—CH2 37 VPV3 Positive Supply VGA—CH3 4 PON2 Preamp Output Negative—CH2 38 VOL3 VGA Output Negative—CH3 5 POP2 Preamp Output Positive—CH2 39 VOH3 VGA Output Positive—CH3 6 VIP2 VGA Input Positive—CH2 40 GND3 Ground VGA—CH3 7 VIN2 VGA Input Negative—CH2 41 GND2 Ground VGA—CH2 8 COM2 Ground Preamp—CH2 42 VOH2 VGA Output Positive—CH2 9 COM3 Ground Preamp—CH3 43 VOL2 VGA Output Negative—CH2 10 VIN3 VGA Input Negative—CH3 44 VPV2 Positive Supply VGA—CH2 11 VIP3 VGA Input Positive—CH3 45 VPV1 Positive Supply VGA—CH1 12 POP3 Preamp Output Positive—CH3 46 VOL1 VGA Output Negative—CH1 13 PON3 Preamp Output Negative—CH3 47 VOH1 VGA Output Positive—CH1 14 VPP3 Positive Supply Preamp—CH3 48 GND1 Ground VGA—CH1 15 PIP3 Preamp Input—CH3 49 HL12 High/Low Pin—CH1 and CH2 16 PMD3 Preamp Input Common—CH3 50 SL12 Slope Decoupling Pin—CH1 and CH2 17 PMD4 Preamp Input Common—CH4 51 SP12 Shutdown—Preamp 1 and Preamp 2 18 PIP4 Preamp Input—CH4 52 EN12 Enable—CH1 and CH2 19 VPP4 Positive Supply Preamp—CH4 53 VCM2 Common-Mode Decoupling Pin—CH2 20 PON4 Preamp Output Negative—CH4 54 VGN2 Gain Control—CH2 21 POP4 Preamp Output Positive—CH4 55 VCM1 Common-Mode Decoupling Pin—CH1 22 VIP4 VGA Input Positive—CH4 56 VGN1 Gain Control—CH1 23 VIN4 VGA Input Negative—CH4 57 COM1 Ground Preamp—CH1 24 COM4 Ground Preamp—CH4 58 VIN1 VGA Input Negative—CH1 25 VGN4 Gain Control—CH4 59 VIP1 VGA Input Positive—CH1 26 VCM4 Common-Mode Decoupling Pin—CH4 60 POP1 Preamp Output Positive—CH1 27 VGN3 Gain Control—CH3 61 PON1 Preamp Output Negative—CH1 28 VCM3 Common-Mode Decoupling Pin—CH3 62 VPP1 Positive Supply Preamp—CH1 29 EN34 Enable—CH3 and CH4 63 PIP1 Preamp Input—CH1 30 SP34 Shutdown—Preamp 3 and Preamp 4 64 PMD1 Preamp Input Common—CH1 31 SL34 Slope Decoupling Pin—CH3 and CH4 EPAD The exposed paddle must be soldered to 32 HL34 High/Low Pin—CH3 and CH4 the PCB ground to ensure proper heat 33 GND4 Ground VGA—CH4 dissipation, noise, and mechanical 34 VOH4 VGA Output Positive—CH4 strength benefits. Rev. B | Page 6 of 28 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS THEORY OF OPERATION ENABLE SUMMARY PREAMP Noise VGA Optimizing the System Dynamic Range Attenuator Gain Control Output Stage VGA Noise APPLICATIONS INFORMATION ULTRASOUND BASIC CONNECTIONS PREAMP CONNECTIONS INPUT OVERDRIVE Input Overload Protection LOGIC INPUTS COMMON-MODE PINS DRIVING ADCs EVALUATION BOARD BOARD LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE