1 Features

1• Maximum Sample Rate: 80 MSPS/14-Bit

• High Signal-to-Noise Ratio

– 75.5-dBFS SNR at 5 MHz / 80 MSPS

– 78.2-dBFS SNR at 5 MHz / 80 MSPS and

Decimation Filter Enabled

– 84-dBc SFDR at 5 MHz / 80 MSPS

• Low Power Consumption

– 58 mW/CH at 50 MSPS

– 77 mW/CH at 80 MSPS (2-LVDS Wire Per

Channel)

• Digital Processing Block

– Programmable FIR Decimation Filter and

Oversampling to Minimize Harmonic

Interference

– Programmable IIR High-Pass Filter to Minimize

DC Offset

– Programmable Digital Gain: 0 dB to 12 dB

– 2-Channel or 4-Channel Averaging

• Flexible Serialized LVDS Outputs:

– One or Two Wires of LVDS Output Lines Per

Channel Depending on ADC Sampling Rate

– Programmable Mapping Between ADC Input

Channels and LVDS Output Pins-Eases Board

Design

– Variety of Test Patterns to Verify Data Capture

by FPGA/Receiver

• Internal and External References

• 1.8-V Operation for Low Power Consumption

• Low-Frequency Noise Suppression

• Recovery From 6-dB Overload Within 1 Clock

Cycle

• Package: 12-mm × 12-mm 80-Pin QFP

2 Applications

• Ultrasound and Sonar Imaging

• Communication Applications

• Multi-channel Data Acquisition

3 Description

The ADS5294 is a low-power 80-MSPS 8-Channel

ADC that uses CMOS process technology and

innovative circuit techniques. Low power

consumption, high SNR, low SFDR, and consistent

overload recovery allow users to design highperformance

systems.

The digital processing block of the ADS5294

integrates several commonly used digital functions for

improving system performance. The device includes

a digital filter module that has built-in decimation

filters (with lowpass, highpass and bandpass

characteristics). The decimation rate is also

programmable (by 2, by 4, or by 8). This rate is useful

for narrow-band applications, where the filters are

used to conveniently improve SNR and knock-off

harmonics, while at the same time reducing the

output data rate. The device includes an averaging

mode where two channels (or even four channels)

are averaged to improve SNR.