ADS7806 Datasheet, PDF (1/18 Pages) Burr-Brown (TI) – Low-Power 12-Bit Sampling CMOS ANALOG-to-DIGITAL CONVERTER

®
ADS7806
Low-Power 12-Bit Sampling CMOS
ANALOG-to-DIGITAL CONVERTER
FEATURES
q 35mW max POWER DISSIPATION
q 50µW POWER DOWN MODE
q 25µs max ACQUISITION AND
CONVERSION
q ±1/2LSB max INL AND DNL
q 72dB min SINAD WITH 1kHz INPUT
q ±10V, 0V TO +5V, AND 0V TO +4V INPUT
RANGES
q SINGLE +5V SUPPLY OPERATION
q PARALLEL AND SERIAL DATA OUTPUT
q PIN-COMPATIBLE WITH 16-BIT ADS7807
q USES INTERNAL OR EXTERNAL
REFERENCE
q 28-PIN 0.3" PLASTIC DIP AND SOIC
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.
R1_IN
40kΩ
R2_IN
20kΩ
10kΩ
CAP
40kΩ
REF
Clock
Successive Approximation Register and Control Logic
R/C
CS
BYTE
Power
Down
CDAC
Comparator
Buffer
6kΩ
Internal
+2.5V Ref
Reference
Power
Down
Parallel
and
Serial
Data
Out
BUSY
Serial Data
Clock
Serial Data
Parallel Data
8
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©_{1992 Burr-Brown Corporation}
PDS-1158C
Printed in U.S.A. November, 1994