®
FPO
ADS
781
9
ADS7819
ADS
781
9
12-Bit 800kHz Sampling CMOS
ANALOG-to-DIGITAL CONVERTER
FEATURES
q
1.25
µ
s THROUGHPUT TIME
q
STANDARD
±
2.5V INPUT RANGE
q
70dB min SINAD WITH 250kHz INPUT
q
±
3/4 LSB max INL AND
±
1 LSB max DNL
q
INTERNAL REFERENCE
q
COMPLETE WITH S/H, REF, CLOCK, ETC.
q
PARALLEL DATA w/ LATCHES
q
28-PIN 0.3" PDIP AND SOIC
DESCRIPTION
The ADS7819 is a complete 12-bit sampling A/D
using state-of-the-art CMOS structures. It contains a
complete 12-bit capacitor-based SAR A/D with inher-
ent S/H, reference, clock, interface for microprocessor
use, and three-state output drivers.
The ADS7819 is specified at an 800kHz sampling
rate, and guaranteed over the full temperature range.
Laser-trimmed scaling resistors provide a
±2.5V
input
range and inherent overvoltage protection up to
±25V.
The 28-pin ADS7819 is available in a plastic 0.3" DIP
and in an SOIC, both fully specified for operation over
the industrial –40°C to +85°C range.
Clock
Successive Approximation Register and Control Logic
CDAC
Output
Latches
and
Three
State
Drivers
575Ω
±2.5V Input
2.5kΩ
Comparator
Cap
BUSY
Three
State
Parallel
Data
Bus
18kΩ
Buffer
4.8kΩ
8.6kΩ
2.5V Ref Out/In
Internal
Ref
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
© 1992 Burr-Brown Corporation
PDS-1193C
Printed in U.S.A. February, 1995
BURR-BROWN [ BURR-BROWN CORPORATION ]
