GENERAL DESCRIPTION

The AD9239 is a quad, 12-bit, 250 MSPS analog-to-digital converter (ADC) with an on-chip temperature sensor and a high speed serial interface. It is designed to support digitizing high frequency, wide dynamic range signals with an input bandwidth up to 780 MHz. The output data are serialized and presented in packet format, consisting of channel-specific information, coded samples, and error correction code.

FEATURES

4 ADCs in 1 package

Coded serial digital outputs with ECC per channel

On-chip temperature sensor

−95 dB channel-to-channel crosstalk

SNR = 65 dBFS with AIN = 85 MHz at 250 MSPS

SFDR = 77 dBc with AIN = 85 MHz at 250 MSPS

Excellent linearity

DNL = ±0.3 LSB (typical)

INL = ±0.7 LSB (typical)

780 MHz full power analog bandwidth

Power dissipation = 380 mW per channel at 250 MSPS

1.25 V p-p input voltage range, adjustable up to 1.5 V p-p

1.8 V supply operation

Clock duty cycle stabilizer

Serial port interface features

Power-down modes

Digital test pattern enable

Programmable header

Programmable pin functions (PGMx, PDWN)

APPLICATIONS

Communication receivers

Cable head end equipment/M-CMTS

Broadband radios

Wireless infrastructure transceivers

Radar/military-aerospace subsystems

Test equipment