6-1
January 1998
ICL7112
12-Bit, High-Speed,
CMOS
μ
P-Compatible A/D Converter
Features
12-Bit Resolution and Accuracy
No Missing Codes
Microprocessor Compatible Byte-Organized Buffered
Outputs
Auto-Zeroed Comparator for Low Offset Voltage
Low Linearity and Gain Errors
Low Power Consumption (60mW)
No Gain or Offset Adjustment Necessary
Provides 3% Usable Overrange
Fast Conversion (40
μ
s
)
Description
The ICL7112 is a monolithic 12-bit resolution, fast
successive approximation A/D converter. It uses thin film
resistors and CMOS circuitry combined with an on-chip
PROM calibration table to achieve 12-bit linearity without
laser trimming. Special design techniques used in the DAC
and comparator result in high speed operation, while the
fully static silicon-gate CMOS circuitry keeps the power
dissipation very low.
Microprocessor bus interfacing is eased by the use of
standard memory WRite and ReaD cycle timing and control
signals, combined with Chip Select and Address pins. The
digital output pins are byte-organized and three-state gated
for bus interface to 8-bit and 16-bit systems.
The lCL7112 provides separate Analog and Digital grounds
for increased system accuracy. Operating with
±
5V supplies,
the lCL7112 accepts 0V to +10V input with a -10V reference
or 0V to -10V input with a +10V reference.
Ordering Information
PART NO.
TEMP. RANGE (
o
C)
PACKAGE
RESOLUTION WITH NO MISSION
CODES
ICL7112JCDL
0 to 70
40 Ld CERDIP
11-Bit
ICL7112KCDL
0 to 70
40 Ld CERDIP
12-Bit
ICL7112LCDL
0 to 70
40 Ld CERDIP
12-Bit (Note)±
ICL7112JIDL
-25 to 85
40 Ld CERDIP
11-Bit
ICL7112KIDL
-25 to 85
40 Ld CERDIP
12-Bit
ICL7112LIDL
-25 to 85
40 Ld CERDIP
12-Bit (Note)±
ICL7112JMDL
-55 to 125
40 Ld CERDIP
11-Bit
ICL7112KMDL
-55 to 125
40 Ld CERDIP
12-Bit
ICL7112LMDL
-55 to 125
40 Ld CERDIP
12-Bit (Note)±
NOTE: Over operating temperature range.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2002. All Rights Reserved
File Number
3639.1
NOT RECOMMENDED FOR NEW DESIGNS