ADS5295 Datasheet, PDF (1/91 Pages) Texas Instruments – 12-Bit, 100-MSPS, 8-Channel Analog-to-Digital Converter

ADS5295
www.ti.com
SBAS595 – DECEMBER 2012
12-Bit, 100-MSPS, 8-Channel Analog-to-Digital Converter
Check for Samples: ADS5295
FEATURES
1
•2 Maximum Sample Rate: 100 MSPS
• Designed for Low Power:
– 80 mW per channel at 100 MSPS
• SNR: 70.6 dBFS
• SFDR: 85 dBc at 10 MHz, 100 MSPS
• Serial LVDS ADC Data Outputs:
– One- or Two-Wire Serialized LVDS Outputs
per Channel
– One-Wire Interface:
Up to 80 MSPS Sample Rate
– Two-Wire Interface:
Up to 100 MSPS Sample Rate
• 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
• Low-Frequency Noise Suppression Mode
• Programmable Mapping Between ADC Input
Channels and LVDS Output Pins
• Channel Averaging Mode
• Variety of LVDS Test Patterns to Verify
Data Capture by FPGA or Receiver
• Package: 12-mm × 12-mm QFP-80
APPLICATIONS
• Ultrasound Imaging
• Communication Applications
• Multichannel Data Acquisition
DESCRIPTION
The ADS5295 is a low-power, 12-bit, 100-MSPS, 8-
channel analog-to-digital converter (ADC). Low power
consumption and integration of multiple channels in a
compact package make the device attractive for very
high channel count data acquisition systems.
Serial low-voltage differential signaling (LVDS)
outputs reduce the number of interface lines and
enable high system integration. The ADC digital data
can be output over one or two wires of LVDS pins per
channel. At high sample rates, the two-wire interface
helps keep the serial data rate low, allowing low-cost
field-programmable gate array (FPGA)-based
receivers to be used.
The device integrates an internal reference trimmed
to accurately match across devices. Best
performance is expected to be achieved through the
internal reference mode. However, the device can be
driven with external references as well.
Several digital functions that are commonly used in
systems are included in the device. These functions
include a low-frequency suppression mode, digital
filtering options, and programmable mapping.
For low input frequency applications, the low-
frequency noise suppression mode enables noise
suppression at low frequencies and improves signal-
to-noise ratio (SNR) in the 1-MHz band near dc by
approximately 3 dB. Digital filtering options include
low-pass, high-pass, and band-pass digital filters, as
well as dc offset removal filters. The device also
provides programmable mapping of the LVDS output
pins and analog input channels. For applications
where the 12-bit ADC SNR is not required, the
ADS5295 can be configured as an 8-channel, 10-bit
ADC with 10x LVDS serialization to reduce the output
data rate.
The device is available in a 12-mm × 12-mm QFP-80
package. The ADS5295 is specified over the –40°C
to +85°C operating temperature range.
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated