ADS7806 Datasheet, PDF (1/25 Pages) Burr-Brown (TI) – Low-Power 12-Bit Sampling CMOS ANALOG-to-DIGITAL CONVERTER

ADS7806
ADS7806
ADS7806
SBAS021B – NOVEMBER 1992 – REVISED SEPTEMBER 2003
Low-Power 12-Bit Sampling CMOS
ANALOG-to-DIGITAL CONVERTER
FEATURES
q POWER DISSIPATION: 35mW max
q POWER-DOWN MODE: 50µW
q ACQUISITION AND CONVERSION: 25µs max
q ±1/2 LSB MAX INL AND DNL
q 72dB MIN SINAD WITH 1kHz INPUT
q INPUT RANGES: ±10V, 0V to +5V, and 0V TO +4V
q SINGLE +5V SUPPLY OPERATION
q PARALLEL AND SERIAL DATA OUTPUT
q PIN-COMPATIBLE WITH THE 16-BIT ADS7807
q USES INTERNAL OR EXTERNAL REFERENCE
q 0.3" DIP-28 AND SO-28
DESCRIPTION
The ADS7806 is a low-power, 12-bit, sampling Analog-to-
Digital (A/D) converter using state of the art CMOS structures.
It contains a complete 12-bit, capacitor-based, Successive
Approximation Register (SAR) A/D converter with sample-
and-hold, clock, reference, and a microprocessor interface 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 ADS7806 is available in a 0.3" DIP-28 and SO-28, 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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