ADS7863A Datasheet, PDF (1/42 Pages) Texas Instruments – Dual, 2-MSPS, 12-Bit, 2 + 2 or 3 + 3 Channel, Simultaneous-Sampling, Analog-to-Digital Converter

ADS7863A
www.ti.com
SBAS610 – DECEMBER 2013
Dual, 2-MSPS, 12-Bit, 2 + 2 or 3 + 3 Channel, Simultaneous-Sampling,
Analog-to-Digital Converter
Check for Samples: ADS7863A
FEATURES
1
•2 Four Fully- or Six Pseudo-Differential Inputs
• SNR: 71 dB
• THD: –81 dB
• Programmable and Buffered Internal 2.5-V
Reference
• Flexible Power-Down Features
• Variable Power-Supply Ranges: 2.7 V to 5.5 V
• Low-Power Operation: 45 mW at 5 V
• Operating Temperature Range:
–40°C to +125°C
• Pin-Compatible with the ADS7861 and
ADS8361 (SSOP Package)
APPLICATIONS
• Motor Control
• Multi-Axis Positioning Systems
• Three-Phase Power Control
DESCRIPTION
The ADS7863A is a dual, 12-bit, 2-MSPS, analog-to-
digital converter (ADC) with four fully-differential or six
pseudo-differential input channels grouped into two
pairs for high-speed, simultaneous signal acquisition.
Inputs to the sample-and-hold (S/H) amplifiers are
fully differential and are maintained differential to the
ADC input. This architecture provides excellent
common-mode rejection of 72 dB at 100 kHz, which
is a critical performance characteristic in noisy
environments.
The device is pin-compatible with the ADS7861, but
offers additional features such as a programmable
reference output, flexible supply voltage (2.7 V to
5.5 V for AV_DD and BV_DD), a pseudo-differential input
multiplexer with three channels per ADC, and several
power-down features.
The device is offered in an SSOP-24 and a 4-mm ×
4-mm QFN-24 package. The device is specified over
the extended operating temperature range of –40°C
to +125°C.
AV_DD
CHA0+
CHA0-
CHA1+
CHA1-
CHB0+
CHB0-
CHB1+
CHB1-
REF_IN
Input
MUX
Input
MUX
SAR
S/H
CDAC
Comparator
S/H
CDAC
Comparator
SAR
BV_DD
SDOA
SDOB
M0
M1
SDI
CLOCK
CS
RD
BUSY
CONVST
BGND
REF_OUT
AGND
10-Bit DAC
2.5-V Reference
Functional Block Diagram
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
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 © 2013, Texas Instruments Incorporated