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SBAS523B – OCTOBER 2010 – REVISED JANUARY 2011
Dual, 1MSPS, 16-/14-/12-Bit, 4×2 or 2×2 Channel, Simultaneous Sampling
Analog-to-Digital Converter
Check for Samples:
1
FEATURES
Eight Pseudo- or Four Fully-Differential Inputs
Simultaneous Sampling of Two Channels
Excellent AC Performance:
– SNR:
93dB (ADS8363)
85dB (ADS7263)
73dB (ADS7223)
– THD:
–98dB (ADS8363)
–92dB (ADS7263)
–86dB (ADS7223)
Dual Programmable and Buffered 2.5V
Reference Allows:
– Two Different Input Voltage Range Settings
– Two-Level PGA Implementation
Programmable Auto-Sequencer
Integrated Data Storage (up to 4 per channel)
for Oversampling Applications
2-Bit Counter for Safety Applications
Fully Specified over the Extended Industrial
Temperature Range
DESCRIPTION
The ADS8363 is a dual, 16-bit, 1MSPS
analog-to-digital converter (ADC) with eight pseudo-
or four fully-differential input channels grouped into
two pairs for simultaneous signal acquisition. The
analog inputs are maintained differentially to the input
of the ADC. The input multiplexer can be used in
either pseudo-differential mode, supporting up to four
channels per ADC (4x2), or in fully-differential mode
that allows to convert up to two inputs per ADC (2x2).
The ADS7263 is a 14-bit version while the ADS7223
is a 12-bit version of the ADS8363.
The ADS8363/7263/7223 offer two programmable
reference outputs, flexible supply voltage ranges, a
programmable auto-sequencer, data storage of up to
four conversion results per channel, and several
power-down features.
All devices are offered in a 5x5mm QFN-32 package.
Functional Block Diagram
AVDD
CHA1P/CHA3
CHA1N/CHA2
CHA0P/CHA1
CHA0N/CHA0
CMA
DVDD
•
•
•
2
•
•
•
•
•
Input
Mux
REF1
REF2
SAR ADC
Serial
Interface
and
FIFO
SAR ADC
CS
CLOCK
BUSY
SDI
RD
SDOA
SDOB
APPLICATIONS
•
•
•
•
•
•
Motor Control: Current and Position
Measurement including Safety Applications
Power Quality Measurement
Three-Phase Power Control
Programmable Logic Controllers
Industrial Automation
Protection Relays
CHB1P/CHB3
CHB1N/CHB2
CHB0P/CHB1
CHB0N/CHB0
CMB
Input
Mux
REF1
REFIO1
REF2
REFIO2
String
DAC
String
DAC
2.5V
REF
Control
Logic
M0
M1
CONVST
RGND
AGND
DGND
1
2
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.
Copyright © 2010–2011, Texas Instruments Incorporated
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.
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