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PDF ICL7136 Data sheet ( Hoja de datos )

Número de pieza ICL7136
Descripción 31/2 Digit LCD/LED/ Low Power Display/ A/D Converters with Overrange Recovery
Fabricantes Intersil 
Logotipo Intersil Logotipo



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No Preview Available ! ICL7136 Hoja de datos, Descripción, Manual

ICL7136, ICL7137
December 1997
31/2 Digit LCD/LED, Low Power Display,
A/D Converters with Overrange Recovery
Features
• First Reading Overrange Recovery in One Conversion
Period
• 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 Display Drive
- LCD ICL7136
- LED lCL7137
• Low Noise - Less Than 15µVP-P
• On Chip Clock and Reference
• No Additional Active Circuits Required
• Low Power - Less Than 1mW
• Surface Mount Package Available
• Drop-In Replacement for ICL7126, No Changes Needed
Ordering Information
TEMP.
PART NUMBER RANGE (oC)
PACKAGE
ICL7136CPL
0 to 70 40 Ld PDIP
ICL7136RCPL
0 to 70 40 Ld PDIP (Note)
ICL7136CM44
0 to 70 44 Ld MQFP
ICL7137CPL
0 to 70 40 Ld PDIP
ICL7137RCPL
0 to 70 40 Ld PDIP (Note)
ICL7137CM44
0 to 70 44 Ld MQFP
NOTE: “R” indicates device with reversed leads.
PKG. NO.
E40.6
E40.6
Q44.10x10
E40.6
E40.6
Q44.10x10
Description
The Intersil ICL7136 and ICL7137 are high performance, low
power 31/2 digit, A/D converters. Included are seven seg-
ment decoders, display drivers, a reference, and a clock.
The ICL7136 is designed to interface with a liquid crystal dis-
play (LCD) and includes a multiplexed backplane drive; the
ICL7137 will directly drive an instrument size, light emitting
diode (LED) display.
The ICL7136 and ICL7137 bring together a combination of
high accuracy, versatility, and true economy. It features auto-
zero to less than 10µV, zero drift of less than 1µV/oC, input
bias current of 10pA (Max), and rollover error of less than
one count. True differential inputs and reference are useful in
all systems, but give the designer an uncommon advantage
when measuring load cells, strain gauges and other bridge
type transducers. Finally, the true economy of single power
supply operation (ICL7136), enables a high performance
panel meter to be built with the addition of only 10 passive
components and a display.
The ICL7136 and ICL7137 are improved versions of the
ICL7126, eliminating the overrange hangover and hysteresis
effects, and should be used in its place in all applications. It
can also be used as a plug-in replacement for the ICL7106
in a wide variety of applications, changing only the passive
components.
Pinouts
(PDIP)
TOP VIEW
V+
D1
C1
B1
(1’s) A1
F1
G1
E1
D2
C2
B2
(10’s)
A2
F2
E2
D3
B3
(100’s)
F3
E3
(1000) AB4
(MINUS) POL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40 OSC 1
39 OSC 2
38 OSC 3
37 TEST
36 REF HI
35 REF LO
34 CREF+
33 CREF-
32 COMMON
31 IN HI
30 IN LO
29 A-Z
28 BUFF
27 INT
26 V-
25 G2 (10’s)
24 C3
23 A3 (100’s)
22 G3
21 BP/GND
(MQFP)
TOP VIEW
NC
NC
TEST
OSC 3
NC
OSC 2
OSC 1
V+
D1
C1
B1
44 43 42 41 40 39 38 37 36 35 34
1 33
2 32
3 31
4 30
5 29
6 28
7 27
8 26
9 25
10 24
11 23
12 13 14 15 16 17 18 19 20 21 22
NC
G2
C3
A3
G3
BP/GND
POL
AB4
E3
F3
B3
A1 F1 G1 E1 D2 C2 B2 A2 F2 E2 D3
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
1
File Number 3086.2

1 page




ICL7136 pdf
ICL7136, ICL7137
Pin Descriptions
PIN NUMBER
44 PIN
40 PIN DIP FLATPACK
18
29
3 10
4 11
5 12
6 13
7 14
8 15
9 16
10 17
11 18
12 19
13 20
14 21
15 22
16 23
17 24
18 25
19 26
20 27
21 28
22 29
23 30
24 31
25 32
26 34
27 35
28 36
29 37
30 38
31 39
32 40
33 41
34 42
35 43
36 44
37 3
38 4
39 6
40 7
NAME
V+
D1
C1
B1
A1
F1
G1
E1
D2
C2
B2
A2
F2
E2
D3
B3
F3
E3
AB4
POL
BP/GND
G3
A3
C3
G2
V-
INT
BUFF
A-Z
IN LO
IN HI
COMMON
CREF-
CREF+
REF LO
REF HI
TEST
OSC3
OSC2
OSC1
FUNCTION
Supply
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Supply
Output
Output
Input
Input
Supply/
Output
Input
Input
Output
Output
Input
DESCRIPTION
Power Supply.
Driver Pin for Segment “D” of the display units digit.
Driver Pin for Segment “C” of the display units digit.
Driver Pin for Segment “B” of the display units digit.
Driver Pin for Segment “A” of the display units digit.
Driver Pin for Segment “F” of the display units digit.
Driver Pin for Segment “G” of the display units digit.
Driver Pin for Segment “E” of the display units digit.
Driver Pin for Segment “D” of the display tens digit.
Driver Pin for Segment “C” of the display tens digit.
Driver Pin for Segment “B” of the display tens digit.
Driver Pin for Segment “A” of the display tens digit.
Driver Pin for Segment “F” of the display tens digit.
Driver Pin for Segment “E” of the display tens digit.
Driver pin for segment “D” of the display hundreds digit.
Driver pin for segment “B” of the display hundreds digit.
Driver pin for segment “F” of the display hundreds digit.
Driver pin for segment “E” of the display hundreds digit.
Driver pin for both “A” and “B” segments of the display thousands digit.
Driver pin for the negative sign of the display.
Driver pin for the LCD backplane/Power Supply Ground.
Driver pin for segment “G” of the display hundreds digit.
Driver pin for segment “A” of the display hundreds digit.
Driver pin for segment “C” of the display hundreds digit.
Driver pin for segment “G” of the display tens digit.
Negative power supply.
Integrator amplifier output. To be connected to integrating capacitor.
Input buffer amplifier output. To be connected to integrating resistor.
Integrator amplifier input.To be connected to auto-zero capacitor.
Differential inputs. To be connected to input voltage to be measured. LO and HI
designators are for reference and do not imply that LO should be connected to
lower potential, e.g., for negative inputs IN LO has a higher potential than IN HI.
Internal voltage reference output.
Connection pins for reference capacitor.
Input pins for reference voltage to the device. REF HI should be positive
reference to REF LO.
Display test. Turns on all segments when tied to V+.
Device clock generator circuit connection pins.
5

5 Page





ICL7136 arduino
ICL7136, ICL7137
Typical Applications
Application Notes
The ICL7136 and ICL7137 may be used in a wide variety of
configurations. 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 semiconductor.
NOTE #
DESCRIPTION
AN016 “Selecting A/D Converters”
AN017 “The Integrating A/D Converter”
AN018 “Do’s and Don’ts of Applying A/D
Converters”
AnswerFAX
DOC. #
9016
9017
9018
AN023 “Low Cost Digital Panel Meter Designs”
9023
AN032 “Understanding the Auto-Zero and
Common Mode Performance of the
ICL7136/7/9 Family”
9032
AN046 “Building a Battery-Operated Auto
Ranging DVM with the ICL7106”
AN052 “Tips for Using Single Chip 31/2 Digit A/D
Converters”
9046
9052
Typical Applications
OSC 1 40
OSC 2 39
OSC 3 38
TEST 37
REF HI 36
REF LO 35
CREF 34
CREF 33
COMMON 32
IN HI 31
IN LO 30
A-Z 29
BUFF 28
INT 27
V - 26
G2 25
C3 24
A3 23
G3 22
BP 21
TO PIN 1
180k
50pF
SET VREF
= 100mV
0.1µF
20k240k
0.47µF
180k
1M
0.01µF
0.047µF
+
IN
-
+
9V
-
TO DISPLAY
TO BACKPLANE
OSC 1 40
OSC 2 39
OSC 3 38
TEST 37
REF HI 36
REF LO 35
CREF 34
CREF 33
COMMON 32
IN HI 31
IN LO 30
A-Z 29
BUFF 28
INT 27
V - 26
G2 25
C3 24
A3 23
G3 22
GND 21
TO PIN 1
180k
50pF
SET VREF
= 100mV
0.1µF
20k240k
+5V
0.47µF
180k
1M
0.01µF
+
IN
-
0.047µF
-5V
TO DISPLAY
Values shown are for 200mV full scale, 3 readings/sec., floating
supply voltage (9V battery).
Values shown are for 200mV full scale, 3 readings/sec. IN LO may
be tied to either COMMON for inputs floating with respect to
supplies, or GND for single ended inputs. (See discussion under
Analog COMMON.)
FIGURE 11. ICL7136 USING THE INTERNAL REFERENCE
FIGURE 12. ICL7137 USING THE INTERNAL REFERENCE
11

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