®
ADS7806
Low-Power 12-Bit Sampling CMOS
ANALOG-to-DIGITAL CONVERTER
FEATURES
q
35mW max POWER DISSIPATION
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50
µ
W POWER DOWN MODE
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25
µ
s max ACQUISITION AND
CONVERSION
q
±
1/2LSB max INL AND DNL
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72dB min SINAD WITH 1kHz INPUT
q
±
10V, 0V TO +5V, AND 0V TO +4V INPUT
RANGES
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q
q
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SINGLE +5V SUPPLY OPERATION
PARALLEL AND SERIAL DATA OUTPUT
PIN-COMPATIBLE WITH 16-BIT ADS7807
USES INTERNAL OR EXTERNAL
REFERENCE
DESCRIPTION
The ADS7806 is a low-power 12-bit sampling analog-
to-digital using state-of-the-art CMOS structures. It
contains a complete 12-bit, capacitor-based, SAR A/D
with S/H, clock, reference, and microprocessor inter-
face with parallel and serial output drivers.
The ADS7806 can acquire and convert to full 12-bit
accuracy in 25µs max while consuming only 35mW
max. Laser-trimmed scaling resistors provide standard
industrial input ranges of
±10V
and 0V to +5V. In
addition, a 0V to +4V range allows development of
complete single supply systems.
The 28-pin ADS7806 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 temperature range.
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28-PIN 0.3" PLASTIC DIP AND SOIC
Clock
Successive Approximation Register and Control Logic
R/C
CS
BYTE
Power
Down
40kΩ
R1
IN
CDAC
BUSY
Parallel
20kΩ
40kΩ
Comparator
and
Serial
Data
Serial Data
Serial Data
Clock
10kΩ
R2
IN
CAP
Buffer
6kΩ
REF
Internal
+2.5V Ref
Reference
Power
Down
Out
Parallel Data
8
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-1158C
Printed in U.S.A. November, 1994
BURR-BROWN [ BURR-BROWN CORPORATION ]
