ADS7861
ADS
7 86
1
AD
S78
61
SBAS110D – DECEMBER 1998 – REVISED AUGUST 2007
Dual, 500kSPS, 12-Bit, 2 + 2 Channel,
Simultaneous Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q
q
q
q
q
q
q
q
4 INPUT CHANNELS
FULLY DIFFERENTIAL INPUTS
2
µ
s TOTAL THROUGHPUT PER CHANNEL
NO MISSING CODES
1MHz EFFECTIVE SAMPLING RATE
LOW POWER: 40mW
SSI SERIAL INTERFACE
OPERATING TEMPERATURE RANGE:
–40
°
C to +125
°
C
DESCRIPTION
The ADS7861 is a dual, 12-bit, 500kSPS, Analog-to-Digital
(A/D) converter with four fully differential input channels
grouped into two pairs for high speed, simultaneous signal
acquisition. Inputs to the sample-and-hold amplifiers are fully
differential and are maintained differential to the input of the
A/D converter. This provides excellent common-mode rejec-
tion of 80dB at 50kHz which is important in high noise
environments.
The ADS7861 offers a high-speed, dual serial interface and
control inputs to minimize software overhead. The output data
for each channel is available as a 12-bit word. The ADS7861
is offered in both an SSOP-24 and a QFN-32 package and is
fully specified over the –40°C to +125°C operating range.
APPLICATIONS
q
MOTOR CONTROL
q
MULTI-AXIS POSITIONING SYSTEMS
q
3-PHASE POWER CONTROL
CH A0+
CH A0–
SAR
SHA
CDAC
CH A1+
CH A1–
COMP
SERIAL DATA A
SERIAL DATA B
M0
REF
IN
Internal
2.5V
Reference
Serial
Interface
M1
A0
CLOCK
CS
REF
OUT
CH B0+
CH B0–
SHA
CDAC
COMP
RD
BUSY
CONVST
CH B1+
CH B1–
SAR
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 Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1998-2007, Texas Instruments Incorporated
www.ti.com
TI [ TEXAS INSTRUMENTS ]
