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ADS7861 Datasheet(PDF) 1 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
Part No. ADS7861
Description  Dual, 500kHz, 12-Bit, 2 2 Channel, Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER
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Maker  BURR-BROWN [Burr-Brown (TI)]
Homepage  http://www.burr-brown.com
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ADS7861 Datasheet(HTML) 1 Page - Burr-Brown (TI)

 
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Dual, 500kHz, 12-Bit, 2 + 2 Channel,
Simultaneous Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q 4 INPUT CHANNELS
q FULLY DIFFERENTIAL INPUTS
q 2
µs TOTAL THROUGHPUT PER CHANNEL
q GUARANTEED NO MISSING CODES
q 1MHz EFFECTIVE SAMPLING RATE
q LOW POWER: 40mW
q SSI SERIAL INTERFACE
APPLICATIONS
q MOTOR CONTROL
q MULTI-AXIS POSITIONING SYSTEMS
q 3-PHASE POWER CONTROL
DESCRIPTION
The ADS7861 is a dual, 12-bit, 500kHz, analog-to-
digital converter with 4 fully differential input channels
grouped into two pairs for high speed, simultaneous
signal acquisition. Inputs to the sample-and-hold ampli-
fiers are fully differential and are maintained differen-
tial to the input of the A/D converter. This provides
excellent common-mode rejection 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 a 24-lead SSOP
package and is fully specified over the –40
°C to +85°C
operating range.
®
ADS7861
© 1998 Burr-Brown Corporation
PDS-1508A
Printed in U.S.A. December, 1998
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
ADS7861
SAR
Serial
Interface
COMP
CLOCK
A0
M1
M0
CONVST
CS
RD
BUSY
SERIAL DATA B
SERIAL DATA A
CDAC
Internal
2.5V
Reference
SHA
CH A0–
CH A0+
REF
IN
CH A1–
CH A1+
SAR
COMP
CDAC
SHA
CH B0–
CH B0+
CH B1–
CH B1+
REF
OUT


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