AD9874ABST Datasheet PDF - ADI

●GENERAL DESCRIPTION

●The AD9874 is a general-purpose IF subsystem that digitizes a low level 10 MHz to 300 MHz IF input with a signal bandwidth ranging from 6.8 kHz to 270 kHz. The signal chain of the AD9874 consists of a low noise amplifier, a mixer, a band-pass sigma-delta analog-to-digital converter, and a decimation filter with programmable decimation factor. An automatic gain control (AGC) circuit gives the AD9874 12 dB of continuous gain adjustment. Auxiliary blocks include both clock and LO synthesizers.

●FEATURES

●  10 MHz to 300 MHz Input Frequency

●  7.2 kHz to 270 kHz Output Signal Bandwidth

●  8.1 dB SSB NF

●  0 dBm IIP3

●  AGC Free Range up to –34 dBm

●  12 dB Continuous AGC Range

●  16 dB Front End Attenuator

●  Baseband I/Q 16-Bit (or 24-Bit) Serial Digital Output

●  LO and Sampling Clock Synthesizers

●  Programmable Decimation Factor, Output Format, AGC, and Synthesizer Settings

●  370 Ω Input Impedance

●  2.7 V to 3.6 V Supply Voltage

●  Low Current Consumption: 20 mA

●  48-Lead LQFP Package (1.4 mm Thick)

●APPLICATIONS

●  Multimode Narrow-Band Radio Products

●     Analog/Digital UHF/VHF FDMA Receivers

●     TETRA, APCO25, GSM/EDGE

●  Portable and Mobile Radio Products

●  Base Station Applications

●  SATCOM Terminals