ADS4122, ADS4125
ADS4142, ADS4145
www.ti.com
SBAS520A –FEBRUARY 2011–REVISED MARCH 2011
14-/12-Bit, 65/125MSPS, Ultralow-Power ADC
Check for Samples: ADS4122, ADS4125, ADS4142, ADS4145
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FEATURES
DESCRIPTION
The ADS412x/4x are lower sampling speed variants
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•
Ultralow Power with 1.8V Single Supply:
of the ADS41xx family of analog-to-digital converters
(ADCs). These devices use innovative design
techniques to achieve high dynamic performance,
while consuming extremely low power at 1.8V supply.
The devices are well-suited for multi-carrier, wide
bandwidth communications applications.
–
–
103mW Total Power at 65MSPS
153mW Total Power at 125MSPS
•
High Dynamic Performance:
–
–
SNR: 72.2dBFS at 170MHz
SFDR: 81dBc at 170MHz
The ADS412x/4x have fine gain options that can be
used to improve SFDR performance at lower
full-scale input ranges, especially at high input
frequencies. They include a dc offset correction loop
that can be used to cancel the ADC offset. At lower
sampling rates, the ADC automatically operates at
scaled down power with no loss in performance.
•
•
Dynamic Power Scaling with Sample Rate
Output Interface:
–
Double Data Rate (DDR) LVDS with
Programmable Swing and Strength
–
–
–
–
Standard Swing: 350mV
Low Swing: 200mV
The ADS412x/4x are available in a compact QFN-48
pacakge and are specified over the industrial
temperature range (–40°C to +85°C).
Default Strength: 100Ω Termination
2x Strength: 50Ω Termination
–
1.8V Parallel CMOS Interface Also
Supported
•
Programmable Gain up to 6dB for SNR/SFDR
Trade-Off
•
•
DC Offset Correction
Supports Low Input Clock Amplitude Down To
200mVPP
•
Package: QFN-48 (7mm × 7mm)
ADS412x/ADS414x Family Comparison
WITH ANALOG INPUT BUFFERS
FAMILY
65MSPS
125MSPS
160MSPS
250MSPS
200MSPS
250MSPS
ADS412x
12-Bit Family
ADS4122
ADS4125
ADS4126
ADS4129
—
ADS41B29
ADS414x
14-Bit Family
ADS4142
ADS4145
ADS4146
ADS4149
—
ADS41B49
9-Bit
—
—
—
—
—
—
—
—
—
ADS58B19
11-Bit
ADS58B18
—
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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PowerPAD is a trademark of Texas Instruments Incorporated.
All other trademarks are the property of their respective owners.
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 © 2011, Texas Instruments Incorporated