®
ADS7833
10-Channel, 12-Bit
DATA ACQUISITION SYSTEM
FEATURES
q
3 SIMULTANEOUS SAMPLED CHANNELS
q
3 SYNCHRONIZED 12-BIT ADCs
q
6.6
µ
s THROUGHPUT RATE
q
FULLY DIFFERENTIAL MUX INPUTS
q
DIGITALLY SELECTABLE INPUT RANGES
q
±
5V POWER SUPPLIES
q
SERIAL DIGITAL INPUT/OUTPUTS
q
2 SIMULTANEOUS SAMPLED AUXILIARY
CHANNELS
q
DIRECT INTERFACE TO MOTOROLA’S
DSP56004/7
APPLICATIONS
q
AC MOTOR SPEED CONTROLS
q
THREE PHASE POWER CONTROL
q
UNINTERRUPTABLE POWER SUPPLIES
q
VIBRATION ANALYSIS
q
PC DATA ACQUISITION
q
MEDICAL INSTRUMENTATION
2
V
1-1
2
V
1-2
2
V
1-3
2
V
2-1
2
V
2-2
2
V
2-3
2
V
3-1
V
3-2
V
3-3
V
3-4
2
2
2
MUX
3
Input Select
Gain Select
Serial IN
SH
3
PGA
3
ADC
3
12-Bit
Serial Out
3
MUX
2
SH
2
PGA
2
ADC
2
12-Bit
Serial Out
2
MUX
1
SH
1
PGA
1
ADC
1
12-Bit
Serial Out
1
DESCRIPTION
The ADS7833 consists of three 12-bit analog-to-digi-
tal converters preceded by three simultaneously oper-
ating sample-hold amplifiers, and multiplexers for 10
differential inputs. The ADCs have simultaneous se-
rial outputs for high speed data transfer and data
processing.
The ADS7833 also offers a programmable gain ampli-
fier with programmable gains of 1.0V/V, 1.25V/V,
2.5V/V, and 5.0V/V. Channel selection and gain se-
lection are selectable through the serial input control
word. The high through put rate is maintained by
simultaneously clocking in the 13-bit input control
word for the next conversion while the present conver-
sions are clocked out.
The part also contains an 8-bit digital-to-analog con-
verter whose digital input is supplied as part of the
input control word.
2.5V
Ref
Control
Logic
Input Setup
Register
DAC
CAP
DAC
8-Bit
Voltage Out
Clock
Convert
Busy
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/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
®
©
1994 Burr-Brown Corporation
PDS-1235C
1
Printed in U.S.A.
ADS7833
May, 1997
BURR-BROWN [ BURR-BROWN CORPORATION ]
