®
ADS
7
809
ADS7809
ADS
7809
DEMO BOARD
AVAILABLE
16-Bit 10
µ
s Serial CMOS Sampling
ANALOG-to-DIGITAL CONVERTER
FEATURES
q
100kHz SAMPLING RATE
q
86dB SINAD WITH 20kHz INPUT
q
±
2 LSB INL
q
DNL: 16 BITS “No Missing Codes”
q
SIX SPECIFIED INPUT RANGES
q
SERIAL OUTPUT
q
SINGLE +5V SUPPLY OPERATION
q
PIN-COMPATIBLE WITH 12-BIT ADS7808
q
USES INTERNAL OR EXTERNAL
REFERENCE
q
100mW MAX POWER DISSIPATION
q
20-PIN 0.3" PLASTIC DIP AND SOIC
q
SIMPLE DSP INTERFACE
DESCRIPTION
The ADS7809 is a complete 16-bit sampling analog-
to-digital using state-of-the-art CMOS structures. It
contains a 16-bit capacitor-based SAR A/D with S/H,
reference, clock, and a serial data interface. Data can
be output using the internal clock, or can be synchro-
nized to an external data clock. The ADS7809 also
provides an output synchronization pulse for ease of
use with standard DSP processors.
The ADS7809 is specified at a 100kHz sampling rate,
and guaranteed over the full temperature range. Laser-
trimmed scaling resistors provide various input ranges
including
±10V
and 0V to 5V, while an innovative
design operates from a single +5V supply, with power
dissipation under 100mW.
The 20-pin ADS7809 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.
R/C
CS
Power
Down
Successive Approximation Register and Control Logic
Clock
20kΩ
R1
IN
10kΩ
R2
IN
20kΩ
5kΩ
R3
IN
CAP
Buffer
4kΩ
REF
Internal
+2.5V Ref
Comparator
Serial
Data
Out
Serial Data
Data Clock
BUSY
CDAC
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-1154D
Printed in U.S.A., November, 1996
BURR-BROWN [ BURR-BROWN CORPORATION ]
