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Intersil Electronic Components Datasheet

ICL7137 Datasheet

(ICL7136 / ICL7137) Digit LCD/LED - Low Power Display - A/D Converters

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ICL7137 pdf
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
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Intersil Electronic Components Datasheet

ICL7137 Datasheet

(ICL7136 / ICL7137) Digit LCD/LED - Low Power Display - A/D Converters

No Preview Available !

ICL7137 pdf
ICL7136, ICL7137
Absolute Maximum Ratings
Supply Voltage
ICL7136, V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
ICL7137, V+ to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
ICL7137, V- to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-9V
Analog Input Voltage (Either Input) (Note 1). . . . . . . . . . . . . V+ to V-
Reference Input Voltage (Either Input) . . . . . . . . . . . . . . . . . V+ to V-
Clock Input
ICL7136 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TEST to V+
ICL7137 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND to V+
Thermal Information
Thermal Resistance (Typical, Note 2)
θJA (oC/W)
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
MQFP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150oC
Maximum Storage Temperature Range . . . . . . . . . .-65oC to 150oC
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC
(MQFP - Lead Tips Only)
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . .0oC to 70oC
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. Input voltages may exceed the supply voltages provided the input current is limited to ±100µA.
2. θJA is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications (Note 3)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
SYSTEM PERFORMANCE
Zero Input Reading
VIN = 0V, Full Scale = 200mV
-000.0 ±000.0 +000.0
Digital
Read-
ing
Ratiometric Reading
VlN = VREF, VREF = 100mV
999 999/ 1000 Digital
1000
Read-
ing
Rollover Error
-VIN = +VlN 200mV Difference in Reading for Equal
Positive and Negative Inputs Near Full Scale
- ±0.2 ±1 Counts
Linearity
Full Scale = 200mV or Full Scale = 2V Maximum
Deviation from Best Straight Line Fit (Note 5)
- ±0.2 ±1 Counts
Common Mode Rejection Ratio
Noise
VCM = ±1V, VIN = 0V, Full Scale = 200mV (Note 5)
- 50 - µV/V
VIN = 0V, Full Scale = 200mV (Peak-To-Peak Value Not
-
15
-
µV
Exceeded 95% of Time) (Note 5)
Leakage Current Input
Zero Reading Drift
Scale Factor Temperature Coefficient
VlN = 0V (Note 5)
VlN = 0V, 0oC To 70oC (Note 5)
VIN = 199mV, 0oC To 70oC, (Ext. Ref. 0ppm/oC) (Note 5)
-
-
-
1 10 pA
0.2 1 µV/oC
1 5 ppm/oC
COMMON Pin Analog Common Voltage 25kBetween Common and Positive Supply (With
Respect to + Supply)
2.4 3.0 3.2
V
Temperature Coefficient of Analog
Common
25kBetween Common and Positive Supply (With
Respect to + Supply) (Note 5)
- 150 - ppm/oC
SUPPLY CURRENT ICL7136
V+ Supply Current
VIN = 0 (Does Not Include Common Current) 16kHz
Oscillator (Note 6)
- 70 100 µA
SUPPLY CURRENT ICL7137
V+ Supply Current
V- Supply Current
VIN = 0 (Does Not Include Common Current) 16kHz
Oscillator (Note 6)
- 70 200 µA
- 40 - µA
DISPLAY DRIVER ICL7136 ONLY
Peak-To-Peak Segment Drive Voltage V+ = to V- = 9V (Note 4)
Peak-To-Peak Backplane Drive Voltage
4 5.5 6
V
2
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Intersil Electronic Components Datasheet

ICL7137 Datasheet

(ICL7136 / ICL7137) Digit LCD/LED - Low Power Display - A/D Converters

No Preview Available !

ICL7137 pdf
ICL7136, ICL7137
Electrical Specifications (Note 3) (Continued)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
DISPLAY DRIVER ICL7137 ONLY
Segment Sinking Current
(Except Pins 19 and 20)
V+ = 5V, Segment Voltage = 3V
5 8 - mA
Pin 19 Only
10 16 - mA
Pin 20 Only
4 7 - mA
NOTES:
3. Unless otherwise noted, specifications apply to both the ICL7136 and ICL7137 at TA = 25oC, fCLOCK = 48kHz. ICL7136 is tested in the
circuit of Figure 1. ICL7137 is tested in the circuit of Figure 2.
4. Back plane drive is in phase with segment drive for ‘off’ segment, 180 degrees out of phase for ‘on’ segment. Frequency is 20 times
conversion rate. Average DC component is less than 50mV.
5. Not tested, guaranteed by design.
6. 48kHz oscillator increases current by 20µA (Typ).
Typical Applications and Test Circuits
+-
IN
9V
R1 R5
R3
R4
C4
C1
C5 C2 R2
C3
DISPLAY
ICL7136
DISPLAY
C1 = 0.1µF
C2 = 0.47µF
C3 = 0.047µF
C4 = 50pF
C5 = 0.01µF
R1 = 240k
R2 = 180k
R3 = 180k
R4 = 10k
R5 = 1M
FIGURE 1. ICL7136 TEST CIRCUIT AND TYPICAL APPLICATION WITH LCD DISPLAY COMPONENTS SELECTED FOR 200mV FULL SCALE
+5V + - -5V
IN
R1 R5
R3
R4
C4
C1
C5 C2 R2
C3
DISPLAY
ICL7137
DISPLAY
C1 = 0.1µF
C2 = 0.47µF
C3 = 0.047µF
C4 = 50pF
C5 = 0.01µF
R1 = 240k
R2 = 180k
R3 = 180k
R4 = 10k
R5 = 1M
FIGURE 2. ICL7137 TEST CIRCUIT AND TYPICAL APPLICATION WITH LED DISPLAY COMPONENTS SELECTED FOR 200mV FULL SCALE
3
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Part Number ICL7137
Description (ICL7136 / ICL7137) Digit LCD/LED - Low Power Display - A/D Converters
Maker Intersil
Total Page 17 Pages
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