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BurrĆBrown Products
from Texas Instruments
ADS5231
SBAS295A – JULY 2004 – REVISED JANUARY 2007
Dual, 12-Bit, 40MSPS, +3.3V
Analog-to-Digital Converter
FEATURES
• Single +3.3V Supply
• High SNR: 70.7dBFS at fIN = 5MHz
• Total Power Dissipation:
Internal Reference: 321mW
External Reference: 285mW
• Internal or External Reference
• Low DNL: ±0.3LSB
• Flexible Input Range: 1.5VPP to 2VPP
• TQFP-64 Package
APPLICATIONS
• Communications IF Processing
• Communications Base Stations
• Test Equipment
• Medical Imaging
• Video Digitizing
• CCD Digitizing
DESCRIPTION
The ADS5231 is a dual, high-speed, high dynamic
range, 12-bit pipelined analog-to-digital converter
(ADC). This converter includes a high-bandwidth
sample-and-hold amplifier that gives excellent
spurious performance up to and beyond the Nyquist
rate. The differential nature of the sample-and-hold
amplifier and ADC circuitry minimizes even-order
harmonics and gives excellent common-mode noise
immunity.
The ADS5231 provides for setting the full-scale
range of the converter without any external reference
circuitry. The internal reference can be disabled,
allowing low-drive, external references to be used for
improved tracking in multichannel systems.
The ADS5231 provides an over-range indicator flag
to indicate an input signal that exceeds the full-scale
input range of the converter. This flag can be used to
reduce the gain of front-end gain control circuitry.
There is also an output enable pin to allow for
multiplexing and testing on a printed circuit board
(PCB).
The ADS5231 employs digital error correction
techniques to provide excellent differential linearity
for demanding imaging applications. The ADS5231 is
available in a TQFP-64 package.
AVDD SDATA SEN SCLK SEL VDRV OEA
ADS5231
Serial
Interface
DISABLE_PLL
INA
VIN
INA
INT/EXT
CM
REFT
REFB
12-Bit
S/H Pipelined
ADC
Internal
Reference
Error
Correction
Logic
3-State
Output
Timing/Duty Cycle
Adjust (PLL)
D11A
·
·
·
D0A
OVRA
DVA
CLK
DVB
INB
VIN
S/H
INB
12-Bit
Pipelined
ADC
Error
Correction
Logic
3-State
Output
D11B
·
·
·
D0B
OVRB
STPD
OEB
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.
All 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 © 2004–2007, Texas Instruments Incorporated
