®
ADS
780
4
ADS7804
DEMO BOARD
AVAILABLE
ADS
780
4
12-Bit 10
µ
s Sampling CMOS
ANALOG-to-DIGITAL CONVERTER
FEATURES
q
100kHz min SAMPLING RATE
q
STANDARD
±
10V INPUT RANGE
q
72dB min SINAD WITH 45kHz INPUT
q
±
0.45 LSB max INL
q
DNL: 12 Bits “No Missing Codes”
q
SINGLE +5V SUPPLY OPERATION
q
PIN-COMPATIBLE WITH 16-BIT ADS7805
q
USES INTERNAL OR EXTERNAL
REFERENCE
q
COMPLETE WITH S/H, REF, CLOCK, ETC.
q
FULL PARALLEL DATA OUTPUT
q
100mW max POWER DISSIPATION
q
28-PIN 0.3" PLASTIC DIP AND SOIC
DESCRIPTION
The ADS7804 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 S/H,
reference, clock, interface for microprocessor use, and
three-state output drivers.
The ADS7804 is specified at a 100kHz sampling rate,
and guaranteed over the full temperature range. Laser-
trimmed scaling resistors provide an industry-
standard
±10V
input range, while the innovative de-
sign allows operation from a single +5V supply, with
power dissipation under 100mW.
The 28-pin ADS7804 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
R/C
CS
BYTE
BUSY
CDAC
20kΩ
±10V Input
10kΩ
4kΩ
Comparator
CAP
Buffer
4kΩ
REF
Internal
+2.5V Ref
Output
Latches
and
Three
State
Drivers
Three
State
Parallel
Data
Bus
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
©
1992 Burr-Brown Corporation
PDS-1156C
Printed in U.S.A. February, 1996
BURR-BROWN [ BURR-BROWN CORPORATION ]
