PRODUCT DESCRIPTION

The AD9870 is a general-purpose IF subsystem that digitizes a low-level 10 MHz–300 MHz IF input with a bandwidth of up to 150 kHz. The signal chain of the AD9870 consists of a low-noise amplifier, a mixer, a variable gain amplifier with integral antialias filter, a bandpass sigma-delta analog-to-digital converter, and a decimation filter with programmable decimation factor.

FEATURES

10 MHz–300 MHz Input Frequency

Baseband (I/Q) Digital Output

10 kHz–150 kHz Output Signal Bandwidth

12 dB SSB NF

> –1 dBm IIP3 (High IIP3 Mode)

25 dB Continuous AGC Range + 16 dB Gain Step

Support for LO and Sampling Clock Synthesis

Programmable Decimation Rate, Output Format, AAF Cutoff, AGC and Synthesizer Settings

360  Input Impedance

2.7 V–3.6 V Supply Voltage

Low Current: 42 mA Typ (High IIP3 Mode), 30 mA Typ (Low IIP3, Fixed Gain Mode)

48-Lead LQFP Package (1.4 mm Thick)

APPLICATIONS

Portable and Mobile Radio Products

Digital UHF/VHF FDMA Products

TETRA