ICL71C03 Datasheet, PDF (1/19 Pages) Intersil Corporation – Precision 4 1/2 Digit, A/D Converter

ICL8052/ICL71C03,
ICL8068/ICL71C03
August 1997
Precision 4¹/₂ Digit, A/D Converter
Features
• Typically Less Than 2µV_P-P Noise (200.00mV Full
Scale, lCL8068)
• Accuracy Guaranteed to ±1 Count Over Entire ±20,000
Counts (2.0000V Full Scale)
• Guaranteed Zero Reading for 0V Input
• True Polarity at Zero Count for Precise Null Detection
• Single Reference Voltage Required
• Over-Range and Under-Range Signals Available for
Auto-Ranging Capability
• All Outputs TTL Compatible
• Medium Quality Reference, 40ppm (Typ) on Board
• Blinking Display Gives Visual Indication of Over
Range
• Six Auxiliary Inputs/Outputs are Available for
Interfacing to UARTs, Microprocessors or Other
Complex Circuitry
• 5pA Input Current (Typ) (8052A)
Description
The ICL8052 or ICL8068/lCL71C03 chip pairs with their
multiplexed BCD output and digit drivers are ideally suited
for the visual display DVM/DPM market. The outstanding
4¹/₂ digit accuracy, 200.00mV to 2.0000V full scale capabil-
ity, auto-zero and auto-polarity combine with true ratiometric
operation, almost ideal differential linearity and time-proven
dual slope conversion. Use of these chip pairs eliminates
clock feedthrough problems, and avoids the critical board
layout usually required to minimize charge injection.
When only 2000 counts of resolution are required, the 71C03
can be wired for 3¹/₂ digits and give up to 30 readings/sec.,
making it ideally suited for a wide variety of applications.
The ICL71C03 is an improved CMOS plug-in replacement for
the lCL7103 and should be used in all new designs.
Ordering Information
PART NUMBER
ICL8052CPD
lCL8052CDD
lCL8052ACPD
ICL8052ACDD
ICL8068CDD
ICL8068ACDD
lCL8068ACJD
ICL71C03CPl
lCL71C03ACPl
TEMP.
RANGE (^oC)
PACKAGE
0 to 70 14 Ld PDIP
0 to 70 14 Ld CERDIP
0 to 70 14 Ld PDIP
0 to 70 14 Ld CERDIP
0 to 70 14 Ld CERDIP
0 to 70 14 Ld CERDIP
0 to 70 14 Ld CERDIP
0 to 70 28 Ld PDIP
0 to 70 28 Ld PDIP
PKG.
NO.
E14.3
F14.3
E14.3
F14.3
F14.3
F14.3
F14.3
E28.6
E28.6
Pinouts
ICL8052/ICL8068
(CERDIP, PDIP)
TOP VIEW
V- 1
COMP OUT 2
14 INT OUT
-1.2V
13 +BUFF IN
REF CAP 3
12 +INT IN
REF BYPASS 4
11 -INT IN
GND 5 ^VREF
10 -BUFF IN
REF OUT 6
9 BUFF OUT
REF SUPPLY 7
ICL8052/ 8 V++
ICL8068
ICL71C03 (PDIP)
TOP VIEW
V+ 1
4¹/₂ / 3¹/₂ 2
POL 3
RUN/HOLD 4
COMP IN 5
V- 6
REFERENCE 7
REF. CAP. 1 8
REF. CAP. 2 9
ANALOG IN 10
ANALOG GND 11
CLOCK IN 12
UNDER-RANGE 13
OVER-RANGE 14
28 BUSY
27 D₁ (LSD)
26 D₂
25 D₃
24 D₄
23 B₈ (MSB)
22 B₄
21 B₂
20 B₁ (LSB)
19 D₅ (MSD)
18 STROBE
17 A-Z IN
16 A-Z OUT
15 DIGITAL GND
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
3-34
File Number 3081.1