1 Features

? Ultralow Power with Single 1.8V Supply,

CMOS Output:

– 277mW total power at 125MSPS

? High Dynamic Performance:

– 88dBc SFDR at 170MHz

– 71.4dBFS SNR at 170MHz

? Crosstalk: > 90dB at 185MHz

? Programmable Gain up to 6dB for

SNR/SFDR Trade-off

? DC Offset Correction

? Output Interface Options:

– 1.8V parallel CMOS interface

– Double data rate (DDR) LVDS with

programmable swing:

? Standard swing: 350mV

? Low swing: 200mV

? Supports Low Input Clock Amplitude

Down to 200mVPP

? Supports Defense, Aerospace, and Medical

Applications

– Controlled Baseline

– One Assembly and Test Site

– One Fabrication Site

– Available in Military (–55°C to 125°C)

Temperature Range

– Extended Product Life Cycle

– Extended Product-Change Notification

– Product Traceability

2 Applications

? Wireless Communications Infrastructure

? Software Defined Radio

? Power Amplifier Linearization

3 Description

The ADS4245 is a low-speed variant of the

ADS42xx ultralow-power family of dual-channel, 14-

bit analog-to-digital converters (ADCs). Innovative

design techniques are used to achieve highdynamic

performance, while consuming extremely low

power with 1.8V supply. This topology makes the

ADS4245 well-suited for multi-carrier, wide-bandwidth

communications applications.

The ADS4245 has gain options that can be used to

improve SFDR performance at lower full-scale input

ranges. These device includes a dc offset correction

loop that can be used to cancel the ADC offset. Both

DDR (double data rate) LVDS and parallel CMOS

digital output interfaces are available in a compact

VQFN-64 PowerPAD? package.

The device includes internal references while the

traditional reference pins and associated decoupling

capacitors have been eliminated. The ADS4245 is

specified over the military temperature range (–55°C

to 125°C).