ADC803
High Speed
ANALOG-TO-DIGITAL CONVERTER
FEATURES
l 12-BIT RESOLUTION
l LINEARITY ERROR: ±0.12%, max
(C Grade)
l NO MISSING CODES: –55°C to +125°C
(S Grade)
l HIGH SINAD RATIO: 72dB
l LOW HARMONIC DISTORTION: –73dB
l CONVERSION TIME: 500ns, 8 Bits
670ns, 10 Bits
1.5µs, 12 Bits
DESCRIPTION
The ADC803 is a high speed hybrid successive
approximation analog-to-digital converter utilizing
laser-trimmed thin film components.
It is complete with internal reference, clock, and
comparator, and is packaged in a 32-pin metal pack-
age. Conversion time is set at the factory to 1.5µs.
With user-adjusted conversion time set at 1µs, ±1LSB
accuracy can be achieved. The gain and offset errors
may be externally trimmed to zero.
Internal scaling resistors are provided for the selection
of analog signal input ranges of 0V to –10V, ±5V,
and ±10V.
Output codes available are complementary binary
for unipolar inputs and bipolar offset binary for
bipolar inputs.
All digital inputs and outputs are TTL-compatible.
Power supply requirements are ±15V and +5V.
12-Bit
Successive Approx.
Register (SAR)
12-Bit
Converter
Clock
Reference
Input
Range
Select
Comparator In
Bipolar Offset
Clock Rate Control
Clock Out
Status
Convert Command
Parallel
Digital
Output
®
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 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©
1983 Burr-Brown Corporation PDS-493D Printed in U.S.A. October, 1993