ADS7824_14 Datasheet, PDF (1/22 Pages) Texas Instruments – 4 Channel, 12-Bit Sampling CMOS A/D Converter

®
ADS7824
ADS7824
ADS7824
www.burr-brown.com/databook/ADS7824.html
4 Channel, 12-Bit Sampling CMOS A/D Converter
FEATURES
q 25µs max SAMPLING AND CONVERSION
q SINGLE +5V SUPPLY OPERATION
q PIN-COMPATIBLE WITH 16-BIT ADS7825
q PARALLEL AND SERIAL DATA OUTPUT
q 28-PIN 0.3" PLASTIC DIP AND SOIC
q ±0.5 LSB max INL AND DNL
q 50mW max POWER DISSIPATION
q 50µW POWER DOWN MODE
q ±10V INPUT RANGE, FOUR CHANNEL
MULTIPLEXER
q CONTINUOUS CONVERSION MODE
DESCRIPTION
The ADS7824 can acquire and convert 12 bits to
within ±0.5 LSB in 25µs max while consuming only
50mW max. Laser-trimmed scaling resistors provide
the standard industrial ±10V input range and channel-
to-channel matching of ±0.1%. The ADS7824 is a
low-power 12-bit sampling A/D with a four channel
input multiplexer, S/H, clock, reference, and a
parallel/serial microprocessor interface. It can be con-
figured in a continuous conversion mode to sequen-
tially digitize all four channels. The 28-pin ADS7824
is available in a plastic 0.3" DIP and in a SOIC, both
fully specified for operation over the industrial –40°C
to +85°C range.
SBAS044
AIN₀
AIN₁
AIN₂
AIN₃
40kΩ
20kΩ
40kΩ
20kΩ
40kΩ
20kΩ
40kΩ
20kΩ
Continuous Conversion
Channel
CONTC
A0
A1
R/C
Clock
8kΩ
Successive Approximation Register
and Control Logic
CS
PWRD
CDAC
8kΩ
8kΩ
8kΩ
CAP
REF
Buffer
6kΩ
Internal
+2.5V Ref
Comparator
Serial
Data
Out
or
Parallel
Data
8
Out
BUSY
DATACLK
SDATA
D7-D0
BYTE
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©_{1996 Burr-Brown Corporation}
PDS-1₁303B
®
A^PriD^nteS^{d in}7^U8^.S2^.A4^{. October, 1997}