ICL7126CPL Intersil, ICL7126CPL Datasheet

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ICL7126CPL

Manufacturer Part Number
ICL7126CPL
Description
IC ADC 3.5 DIGIT LCD LP 40-DIP
Manufacturer
Intersil
Datasheet

Specifications of ICL7126CPL

Display Type
LCD
Configuration
7 Segment
Digits Or Characters
A/D 3.5 Digits
Current - Supply
70µA
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Voltage - Supply
-
Interface
-
Other names
ICL7126CPLIS

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3 1/2 Digit, Low Power, Single Chip A/D
Converter
The ICL7126 is a high performance, very low power
3
are contained on a single CMOS IC, including seven
segment decoders, display drivers, reference, and clock. The
ICL7126 is designed to interface with a liquid crystal display
(LCD) and includes a backplane drive. The supply current of
100µA is ideally suited for 9V battery operation.
The ICL7126 brings together an unprecedented combination
of high accuracy, versatility, and true economy. It features
auto-zero to less than 10µV, zero drift of less than 1µV/
input bias current of 10pA maximum, and rollover error of
less than one count. The versatility of true differential input
and reference is useful in all systems, but gives the designer
an uncommon advantage when measuring load cells, strain
gauges and other bridge-type transducers. And finally the
true economy of single power operation allows a high
performance panel meter or multi-meter to be built with the
addition of only 10 passive components and a display.
The ICL7126 can be used as a plug-in replacement for the
ICL7106 in a wide variety of applications, changing only the
passive components.
Ordering Information
NOTES:
ICL7126CPL
ICL7126CPLZ
(Note 1)
PART NUMBER
1. Intersil Pb-free products employ special Pb-free material sets;
2. Pb-free PDIPs can be used for through hole wave solder
1
/
2
molding compounds/die attach materials and 100% matte tin
plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations.
Intersil Pb-free products are MSL classified at Pb-free peak
reflow temperatures that meet or exceed the Pb-free
requirements of IPC/JEDEC J STD-020C.
processing only. They are not intended for use in Reflow solder
processing applications.
-digit, A/D converter. All the necessary active devices
TEMP. RANGE
0 to 70
0 to 70
(°C)
®
1
40 Ld PDIP
40 Ld PDIP
(Pb-free) (Note 2)
Data Sheet
PACKAGE
E40.6
E40.6
DWG. #
PKG.
1-888-INTERSIL or 321-724-7143
o
C,
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• 8,000 Hours Typical 9V Battery Life
• Guaranteed Zero Reading for 0V Input on All Scales
• True Polarity at Zero for Precise Null Detection
• 1pA Typical Input Current
• True Differential Input and Reference
• Direct LCD Display Drive - No External Components
• Pin Compatible With the ICL7106
• Low Noise - Less Than 15µV
• On-Chip Clock and Reference
• Low Power Dissipation Guaranteed Less Than 1mW
• No Additional Active Circuits Required
• Pb-Free Available (RoHS Compliant)
Pinout
Required
October 25, 2004
All other trademarks mentioned are the property of their respective owners.
(100s)
|
(10s)
(1000) AB4
(1s)
Intersil (and design) is a registered trademark of Intersil Americas Inc.
(MINUS)
Copyright © Intersil Americas Inc. 2003, 2004. All Rights Reserved
POL
G1
V+
D1
C1
B1
A1
E1
D2
C2
B2
A2
E2
D3
B3
E3
F1
F2
F3
10
12
13
14
15
16
17
18
19
20
11
1
2
3
4
5
6
7
8
9
ICL7126 (PDIP)
TOP VIEW
P-P
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
OSC 1
OSC 2
OSC 3
TEST
REF HI
REF LO
C
C
COMMON
IN HI
IN LO
A-Z
BUFF
INT
V-
G2 (10s)
C3
A3
G3
BP/GND
ICL7126
REF
REF
FN3084.5
+
-
(100s)

Related parts for ICL7126CPL

ICL7126CPL Summary of contents

Page 1

... Ordering Information TEMP. RANGE PART NUMBER (°C) PACKAGE ICL7126CPL PDIP ICL7126CPLZ PDIP (Note 1) (Pb-free) (Note 2) NOTES: 1. Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations ...

Page 2

Absolute Maximum Ratings Supply Voltage ...

Page 3

Typical Application Schematics 50pF FIGURE 1. ICL7126 TEST CIRCUIT AND TYPICAL APPLICATION WITH LCD DISPLAY COMPONENTS SELECTED FOR 200mV FULL SCALE SET REF = 100.0mV R 3 FIGURE 2. ICL7126 CLOCK FREQUENCY 16kHz, 1 READING/S 3 ICL7126 ...

Page 4

Typical Application Schematics 240kΩ 50pF 4 ICL7126 (Continued 1MΩ 10kΩ C 0.1µF 1 DISPLAY ICL7126 DISPLAY ...

Page 5

Design Information Summary Sheet • OSCILLATOR FREQUENCY f = 0.45/RC OSC C > 50pF; R > 50kΩ OSC OSC f (Typ) = 48kHz OSC • OSCILLATOR PERIOD t = RC/0.45 OSC • INTEGRATION CLOCK FREQUENCY CLOCK ...

Page 6

Detailed Description Analog Section Figure 4 shows the Functional Diagram of the Analog Section for the ICL7126. Each measurement cycle is divided into three phases. They are (1) auto-zero (A-Z), (2) signal integrate (INT) and (3) de-integrate (DE). Auto-Zero Phase ...

Page 7

V+ REF HI REF LO ICL7126 FIGURE 5A. Differential Reference The reference voltage can be generated anywhere within the power supply voltage of the converter. The main source of common mode error is a roll-over voltage caused by the reference ...

Page 8

V+ ICL7126 BP 21 TEST 37 FIGURE 6. SIMPLE INVERTER FOR FIXED DECIMAL POINT TEST The TEST pin serves two functions coupled to the internally generated digital supply through a 500Ω resistor. Thus it can be used as ...

Page 9

TYPICAL SEGMENT OUTPUT V+ 0.5mA SEGMENT OUTPUT 2mA INTERNAL DIGITAL GROUND † THREE INVERTERS. ONE INVERTER SHOWN FOR CLARITY. OSC 1 INTERNAL TO PART TEST ICL7126 FIGURE 9A. EXTERNAL SIGNAL 9 ICL7126 a b LCD PHASE DRIVER ...

Page 10

... The circuits which follow show some of the possibilities, and serve to illustrate the exceptional versatility of these A/D converters. The following application notes contain very useful information on understanding and applying this part and are available from Intersil Corporation. Application Notes NOTE # AN016 “Selecting A/D Converters” ...

Page 11

Typical Applications OSC 1 40 180kΩ OSC 2 39 OSC 3 38 50pF TEST 37 REF REF 0.1µ REF COMMON 0.33µF A-Z 29 180kΩ BUFF ...

Page 12

Typical Applications (Continued) OSC 1 40 † OSC 2 39 OSC 3 38 50pF TEST 37 REF 20kΩ 100kΩ REF 0.1µ REF COMMON 0.33µF A-Z ...

Page 13

Typical Applications (Continued) O /RANGE U /RANGE FIGURE 17. CIRCUIT FOR DEVELOPING UNDERRANGE AND OVERRANGE SIGNAL FROM ICL7126 OUTPUTS TO PIN 1 OSC 1 40 180kΩ OSC 2 39 OSC 3 38 50pF TEST 37 REF HI 36 REF LO ...

Page 14

Die Characteristics DIE DIMENSIONS: 127 mils x 149 mils METALLIZATION: Type: Al ±1k Å Å Thickness: 10k Metallization Mask Layout D (15 (16 (17 (18 (19) 4 POL (20) BP/GND (21) G ...

Page 15

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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