Texas Instruments ADS42B49IRGCT

Description
The ADS42B49 is a dual-channel, 14-bit, 250 MSPS analog-to-digital converter (ADC) with integrated analog input buffers. It utilizes innovative design techniques to achieve high dynamic performance while consuming extremely low power. The presence of analog input buffers makes this device easy to drive and helps achieve high performance over a wide frequency range. The ADS42B49 is well-suited for multi-carrier, wide bandwidth communications applications.
The ADS42B49 has gain options that can be used to improve SFDR performance at lower full-scale input ranges. This device also includes a DC offset correction loop that can be used to cancel the ADC offset. Both DDR LVDS and parallel CMOS digital output interfaces are available in a compact QFN-64 PowerPAD™ package. The device includes internal references while the traditional reference pins and associated decoupling capacitors have been eliminated. The ADS42B49 is specified over the industrial temperature range (-40°C to 85°C).

Features
Maximum Sample Rate: 250 MSPS
Ultralow Power:
-850-mW Total Power at 250 MSPS
Integrated Analog Input Buffer:
Input Capacitance: 2.2 pF at 170 MHz
Input Resistance: 1.1 kΩ at 170 MHz
High Dynamic Performance:
-85-dBc SFDR at 170 MHz
-70.7-dBFS SNR at 170 MHz
Crosstalk: > 85 dB at 185 MHz
Programmable Gain Up to 6 dB for SNR and SFDR Trade-off
DC Offset Correction
Output Interface Options:
1.8-V Parallel CMOS Interface
Double Data Rate (DDR) LVDS with Programmable Swing:
Standard Swing: 350 mV
Low Swing: 200 mV
Supports Low Input Clock Amplitude Down to 200 mVpp
Package: 9-mm x 9-mm, 64-Pin Quad Flat No-Lead (QFN) Package

Applications
Wireless Communications Infrastructure
Software Defined Radio
Power Amplifier Linearization