®
ADS7835
For most current data sheet and other product
information, visit www.burr-brown.com
12-Bit, High-Speed, Low Power Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q
500kHz THROUGHPUT RATE
q
2.5V INTERNAL REFERENCE
q
LOW POWER: 17.5mW
q
SINGLE SUPPLY +5V OPERATION
q
SERIAL INTERFACE
q
GUARANTEED NO MISSING CODES
q
MSOP-8
q
±
V
REF
INPUT RANGE
DESCRIPTION
The ADS7835 is a 12-bit, sampling analog-to-digi-
tal converter (A/D) complete with sample-and-hold
(S/H), internal 2.5V reference, and synchronous
serial interface. Typical power dissipation is 17.5mW
at a 500kHz throughput rate. The device can be
placed into a power-down mode which reduces dis-
sipation to just 2.5mW. The input range is –V
REF
to
+V
REF
, and the internal reference can be overdriven
by an external voltage.
Low power, small size, and high speed make the
ADS7835 ideal for battery-operated systems such
as wireless communication devices, portable multi-
channel data loggers, and spectrum analyzers. The
serial interface also provides low cost isolation for
remote data acquisition. The ADS7835 is avail-
able in an MSOP-8 package and is guaranteed over
the –40°C to +85°C temperature range.
APPLICATIONS
q
BATTERY-OPERATED SYSTEMS
q
DIGITAL SIGNAL PROCESSING
q
HIGH-SPEED DATA ACQUISITION
q
WIRELESS COMMUNICATION SYSTEMS
CLK
SAR
CONV
±2.5V
Input
2kΩ
CDAC
2kΩ
Serial
Interface
Comparator
DATA
S/H Amp
Buffer
Internal
+2.5V Ref
V
REF
10kΩ
±30%
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
®
©
1998 Burr-Brown Corporation
PDS-1478B
1
ADS7835
Printed in U.S.A.May, 2000
BURR-BROWN [ BURR-BROWN CORPORATION ]
