PRODUCT OVERVIEW

The AD9864 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 AD9864 consists of a low noise amplifier (LNA), a mixer, a band-pass Σ-∆ analog-to-digital converter (ADC), and a deci mation filter with programmable decimation factor. An auto matic gain control (AGC) circuit gives the AD9864 12 dB of

continuous gain adjustment. Auxiliary blocks include both clock and LO synthesizers.

FEATURES

10 MHz to 300 MHz input frequency

6.8 kHz to 270 kHz output signal bandwidth

7.5 dB SSB NF

–7.0 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 sythesizer settings

370 Ω input impedance

2.7 V to 3.6 V supply voltage

Low current consumption: 17 mA

48-lead LFCSP package

APPLICATIONS

Multimode narrow-band radio products

  Analog/digital UHF/VHF FDMA receivers

  TETRA, APCO25, GSM/EDGE

Portable and mobile radio products

SATCOM terminals