®
ADS
7
824
ADS7824
782
4
ADS
www.burr-brown.com/databook/ADS7824.html
4 Channel, 12-Bit Sampling CMOS A/D Converter
FEATURES
q
25
µ
s 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.
Continuous Conversion
CONTC
40kΩ
AIN
0
Clock
20kΩ
40kΩ
AIN
1
8kΩ
Channel
A0
A1
R/C
CS
PWRD
Successive Approximation Register
and Control Logic
CDAC
BUSY
20kΩ
40kΩ
AIN
2
8kΩ
Serial
Comparator
Data
Out
SDATA
DATACLK
20kΩ
40kΩ
AIN
3
8kΩ
or
Parallel
Data
Out
8
D7-D0
BYTE
20kΩ
8kΩ
Buffer
CAP
6kΩ
REF
Internal
+2.5V Ref
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
®
©
1996 Burr-Brown Corporation
PDS-1303B
1
Printed in U.S.A.
ADS7824
October, 1997
BURR-BROWN [ BURR-BROWN CORPORATION ]
