ADS7808 Burr-Brown Corporation, ADS7808 Datasheet
ADS7808
Manufacturer Part Number
ADS7808
Description
12-Bit 10ms Serial CMOS Sampling ANALOG-to-DIGITAL CONVERTER
Manufacturer
Burr-Brown Corporation
Datasheet
1.ADS7808.pdf
(10 pages)
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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
©
FEATURES
1992 Burr-Brown Corporation
100kHz SAMPLING RATE
72dB SINAD WITH 45kHz INPUT
SIX SPECIFIED INPUT RANGES
SERIAL OUTPUT
SINGLE +5V SUPPLY OPERATION
PIN-COMPATIBLE WITH 16-BIT ADS7809
USES INTERNAL OR EXTERNAL
REFERENCE
100mW MAX POWER DISSIPATION
20-PIN 0.3" PLASTIC DIP AND SOIC
SIMPLE DSP INTERFACE
1/2 LSB INL AND DNL
R1
R2
R3
CAP
REF
IN
IN
IN
ANALOG-to-DIGITAL CONVERTER
12-Bit 10 s Serial CMOS Sampling
20k
10k
5k
20k
®
Successive Approximation Register and Control Logic
Buffer
4k
R/C
CDAC
+2.5V Ref
Internal
PDS-1155B
1
CS
DESCRIPTION
The ADS7808 is a complete 12-bit sampling analog-
to-digital using state-of-the-art CMOS structures. It
contains a 12-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 ADS7808 also
provides an output synchronization pulse for ease of
use with standard DSP processors.
The ADS7808 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 ADS7808 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
Comparator
Serial
Data
Out
ADS7808
Printed in U.S.A. January 1997
ADS7808
Clock
BUSY
Data Clock
Serial Data
®
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