®
ADS7809
ADS7809
DEMO BOARD
AVAILABLE
ADS7809
16-Bit 10µs Serial CMOS Sampling
ANALOG-to-DIGITAL CONVERTER
DESCRIPTION
FEATURES
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.
● 100kHz SAMPLING RATE
● 86dB SINAD WITH 20kHz INPUT
● ±2 LSB INL
● DNL: 16 BITS “No Missing Codes”
● SIX SPECIFIED INPUT RANGES
● SERIAL OUTPUT
● SINGLE +5V SUPPLY OPERATION
● PIN-COMPATIBLE WITH 12-BIT ADS7808
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.
● USES INTERNAL OR EXTERNAL
REFERENCE
● 100mW MAX POWER DISSIPATION
● 20-PIN 0.3" PLASTIC DIP AND SOIC
● SIMPLE DSP INTERFACE
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.
Power
Down
R/C
CS
Successive Approximation Register and Control Logic
Clock
20kΩ
10kΩ
CDAC
R1IN
R2IN
BUSY
Serial
20kΩ
5kΩ
Data
Out
Data Clock
Serial Data
Comparator
R3IN
CAP
Internal
+2.5V Ref
Buffer
4kΩ
REF
International Airport Industrial Park
•
Mailing Address: PO Box 11400, Tucson, AZ 85734
FAXLine: (800) 548-6133 (US/Canada Only)
•
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
©1992 Burr-Brown Corporation
PDS-1154D
Printed in U.S.A., November, 1996