AD9874ABST Analog Devices Inc, AD9874ABST Datasheet - Page 2

• Manufacturer Part Number: AD9874ABST
• Description: IC IF DIGIT SUBSYSTEM 48-LQFP
• Manufacturer: Analog Devices Inc

Specifications of AD9874ABST

• Frequency: 10MHz ~ 300MHz
• Rohs Status: RoHS non-compliant
• Function: IF Digitizing Subsystem
• Rf Type: UHF, Cellular, TETRA, GSM, EDGE, APCO25
• Secondary Attributes: 16dB Front End Attenuator
• Package / Case: 48-LQFP
• Ic Function: A/D Converter (A-D)
• Supply Voltage Range: 2.7V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: LQFP
• No. Of Pins: 48
• Msl: MSL 3 - 168 Hours
• For Use With: AD9874-EB - BOARD EVAL FOR AD9874
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD9874
TABLE OF CONTENTS
AD9874—SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . 3
ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . 5
PIN CONFIGURATION/DESCRIPTION . . . . . . . . . . . . . 6
DEFINITION OF SPECIFICATIONS/
TYPICAL PERFORMANCE CHARACTERISTICS . . . . . 8
SERIAL PERIPHERAL INTERFACE (SPI) . . . . . . . . . . . 13
SYNCHRONOUS SERIAL INTERFACE (SSI) . . . . . . . . 16
POWER CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
LO SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
CLOCK SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . 21
IF LNA/MIXER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
BAND-PASS SIGMA DELTA ( - ) ADC . . . . . . . . . . . . 24
DECIMATION FILTER . . . . . . . . . . . . . . . . . . . . . . . . . . 26
VARIABLE GAIN AMPLIFIER WITH AGC . . . . . . . . . . 28
APPLICATION CONSIDERATIONS . . . . . . . . . . . . . . . 32
EXTERNAL PASSIVE COMPONENT
APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
LAYOUT EXAMPLE
OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . 39
REVISION HISTORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
TEST METHODS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Synchronization Using SYNCB . . . . . . . . . . . . . . . . . . . . 18
Interfacing to DSPs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Fast Acquire Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Variable Gain Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Automatic Gain Control . . . . . . . . . . . . . . . . . . . . . . . . . 29
System NF vs. VGA Control . . . . . . . . . . . . . . . . . . . . . . 31
Frequency Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Spurious Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Superheterodyne Receiver . . . . . . . . . . . . . . . . . . . . . . . . 34
Synchronization of Multiple AD9874s . . . . . . . . . . . . . . . 36
Split Path Rx Architecture . . . . . . . . . . . . . . . . . . . . . . . . 37
Hung Mixer Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
EVALUATION BOARD AND SOFTWARE . . . . . . . . . 38
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