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S/H
Comparator
CDAC
Input
MUX
AV
DD
REF
IN
SAR
S/H
Comparator
CDAC
Input
MUX
REF
OUT
AGND
SAR
10-BitDAC
2.5VReference
SerialInterface
CHA0+
CHA0-
CHA1+
CHA1-
BV
DD
SDOA
SDOB
M0
M1
SDI
CLOCK
CS
RD
BUSY
CONVST
BGND
CHB0+
CHB0-
CHB1+
CHB1-
ADS7863
www.ti.com
SBAS383E –JUNE 2007–REVISED JANUARY 2011
Dual, 2MSPS, 12-Bit, 2 + 2 or 3 + 3 Channel, Simultaneous Sampling
ANALOG-TO-DIGITAL CONVERTER
Check for Samples: ADS7863
1
FEATURES
DESCRIPTION
2
• Four Fully- or Six Pseudo-Differential Inputs
The ADS7863 is a dual, 12-bit, 2MSPS,
analog-to-digital converter (ADC) with four fully
• SNR: 71dB, THD: –81dB
differential or six pseudo-differential input channels
• Programmable and Buffered Internal 2.5V
grouped into two pairs for high-speed, simultaneous
Reference
signal acquisition. Inputs to the sample-and-hold
• Flexible Power-Down Features
(S/H) amplifiers are fully differential and are
maintained differential to the input of the ADC. This
• Variable Power-Supply Ranges: 2.7V to 5.5V
architecture provides excellent common-mode
• Low-Power Operation: 45mW at 5V
rejection of 72dB at 100kHz, which is a critical
• Operating Temperature Range:
performance characteristic in noisy environments.
–40°C to +125°C
The ADS7863 is pin-compatible with the ADS7861,
• Pin-Compatible with ADS7861 and ADS8361
but offers additional features such as a
(SSOP package)
programmable reference output, flexible supply
voltage (2.7V to 5.5V for AV
DD
and BV
DD
), a
APPLICATIONS
pseudo-differential input multiplexer with three
channels per ADC, and several power-down features.
• Motor Control
• Multi-Axis Positioning Systems
The ADS7863 is offered in an SSOP-24 and a
• Three-Phase Power Control
4x4mm QFN-24 package. It is specified over the
extended operating temperature range of –40°C to
+125°C.
Functional Block Diagram
1
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.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007–2011, Texas Instruments Incorporated
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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