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ICL7135CPL Datasheet

  • ICL7135CPL

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ICL7135
TM
Data Sheet
December 2000
File Number
3093.2
4
1
/
2
Digit, BCD Output, A/D Converter
The Intersil ICL7135 precision A/D converter, with its
multiplexed BCD output and digit drivers, combines dual-
slope conversion reliability with
鹵1
in 20,000 count accuracy
and is ideally suited for the visual display DVM/DPM market.
The 2.0000V full scale capability, auto-zero, and auto-
polarity are combined with true ratiometric operation, almost
ideal differential linearity and true differential input. All
necessary active devices are contained on a single CMOS
lC, with the exception of display drivers, reference, and a
clock.
The ICL7135 brings together an unprecedented combination
of high accuracy, versatility, and true economy. It features
auto-zero to less than 10碌V, zero drift of less than 1碌V/
o
C,
input bias current of 10pA (Max), and rollover error of less
than one count. The versatility of multiplexed BCD outputs is
increased by the addition of several pins which allow it to
operate in more sophisticated systems. These include
STROBE, OVERRANGE, UNDERRANGE, RUN/HOLD and
BUSY lines, making it possible to interface the circuit to a
microprocessor or UART.
Features
鈥?Accuracy Guaranteed to
鹵1
Count Over Entire
鹵20000
Counts (2.0000V Full Scale)
鈥?Guaranteed Zero Reading for 0V Input
鈥?1pA Typical Input Leakage Current
鈥?True Differential Input
鈥?True Polarity at Zero Count for Precise Null Detection
鈥?Single Reference Voltage Required
鈥?Overrange and Underrange Signals Available for Auto-
Range Capability
鈥?All Outputs TTL Compatible
鈥?Blinking Outputs Gives Visual Indication of Overrange
鈥?Six Auxiliary Inputs/Outputs are Available for Interfacing to
UARTs, Microprocessors, or Other Circuitry
鈥?Multiplexed BCD Outputs
Ordering Information
PART NUMBER
ICL7135CPI
TEMP.
RANGE (
o
C)
0 to 70
PACKAGE
28 Ld PDIP
PKG.
NO.
E28.6
Pinout
ICL7135
(PDIP)
TOP VIEW
V- 1
REFERENCE 2
ANALOG COMMON 3
INT OUT 4
AZ IN 5
BUFF OUT 6
REF CAP - 7
REF CAP + 8
IN LO 9
IN HI 10
V+ 11
(MSD) D5 12
(LSB) B1 13
B2 14
28 UNDERRANGE
27 OVERRANGE
26 STROBE
25 R/H
24 DIGITAL GND
23 POL
22 CLOCK IN
21 BUSY
20 (LSD) D1
19 D2
18 D3
17 D4
16 (MSB) B8
15 B4
1
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 trademark of Intersil Corporation.
|
Copyright 漏 Intersil Corporation 2000

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