1 ADS7835
®
ADS7835
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.
12-Bit, High-Speed, Low Power Sampling
ANALOG-TO-DIGITAL CONVERTER
®
FEATURES
l 500kHz THROUGHPUT RATE
l 2.5V INTERNAL REFERENCE
l LOW POWER: 17.5mW
l SINGLE SUPPLY +5V OPERATION
l SERIAL INTERFACE
l GUARANTEED NO MISSING CODES
l MSOP-8
l ±V
REF
INPUT RANGE
APPLICATIONS
l BATTERY-OPERATED SYSTEMS
l DIGITAL SIGNAL PROCESSING
l HIGH-SPEED DATA ACQUISITION
l WIRELESS COMMUNICATION SYSTEMS
©
1998 Burr-Brown Corporation PDS-1478B Printed in U.S.A.May, 2000
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
SAR
CLK
Serial
Interface
ComparatorS/H Amp
DATA
– 2.5V
Input
CDAC
Internal
+2.5V Ref
Buffer
V
REF
CONV
10kΩ – 30%
2kΩ
2kΩ
For most current data sheet and other product
information, visit www.burr-brown.com