ICL7139, ICL7149
August 1997
3
3
/
4
Digit,
Autoranging Multimeter
Description
The Intersil ICL7139 and ICL7149 are high performance, low
power, auto-ranging digital multimeter lCs. Unlike other
autoranging multimeter ICs, the ICL7139 and ICL7149
always display the result of a conversion on the correct
range. There is no 鈥渞ange hunting鈥?noticeable in the display.
The unit will autorange between the four different ranges. A
manual switch is used to select the 2 high group ranges. DC
current ranges are 4mA and 40mA in the low current group,
and 400mA and 4A in the high current group. Resistance
measurements are made on 4 ranges, which are divided into
two groups. The low resistance ranges are 4/40k鈩? The high
resistance ranges are 0.4/4M鈩? Resolution on the lowest
range is 1鈩?
Features
鈥?13 Ranges - ICL7139
- 4 DC Voltage 400mV, 4V, 40V, 400V
- 1 AC Voltage 400V
- 4 DC Current 4mA, 40mA, 400mA, 4A
- 4 Resistance 4k鈩? 40k鈩? 400k鈩? 4M鈩?/div>
鈥?18 Ranges - ICL7149
- 4 DC Voltage 400mV, 4V, 40V, 400V
- 2 AC Voltage with Optional AC Circuit
- 4 DC Current 4mA, 40mA, 400mA, 4A
- 4 AC Current with Optional AC Circuit
- 4 Resistance 4k鈩? 40k鈩? 400k鈩? 4M鈩?/div>
鈥?Autoranging - First Reading is Always on Correct Range
鈥?On-Chip Duplex LCD Display Drive Including Three Dec-
imal Points and 11 Annunciators
鈥?No Additional Active Components Required
鈥?Low Power Dissipation - Less than 20mW - 1000 Hour
Typical Battery Life
鈥?Display Hold Input
鈥?Continuity Output Drives Piezoelectric Beeper
鈥?Low Battery Annunciator with On-Chip Detection
鈥?Guaranteed Zero Reading for 0V Input on All Ranges
Ordering Information
PART NUMBER
ICL7139CPL
ICL7149CPL
ICL7149CM44
TEMP.
RANGE (
o
C)
0 to 70
0 to 70
0 to 70
PACKAGE
40 Ld PDIP
40 Ld PDIP
44 Ld MQFP
PKG. NO.
E40.6
E40.6
Q44.10x10
Pinouts
ICL7139, ICL7149 (PDIP)
TOP VIEW
F
1
/ DP
2
POL/AC
BP2
BP1
V+
V-
1
2
3
4
5
40 ADG
3
/E
3
B
2
/C
2
39 B
3
/C
3
38 F
2
/DP
3
37 G
2
/E
2
36 A
2
/D
2
35 B
2
/C
2
34 F
1
/DP
2
33 G
1
/E
1
32 A
1
/D
1
31 B
1
/C
1
30 F
0
/DP
1
29 G
0
/E
0
28 A
0
/D
0
27 B
0
/C
0
26 LO BAT/V
25 M鈩?碌A(chǔ)
24
鈩?A
V
REF
LO鈩?/div>
COMMON
INT V/鈩?/div>
DEINT
INT 1
23 k/m
22 OSC IN
21 OSC OUT
TRIPLE POINT
C
INT
C
AZ
HI鈩?/div>
V-
A
2
/D
2
G
2
/E
2
F
2
/DP
3
B
3
/C
3
ADG
3
/E
3
POL/AC
NC
BP2
BP1
V+
NC
1
44 43 42 41 40 39 38 37 36 35 34
33
2
32
3
4
5
6
7
8
9
31
30
29
28
27
26
25
M鈩?碌A(chǔ)
鈩?A
k/m
OSC IN
OSC OUT
HOLD
HI鈩?DC/LO鈩?AC
V/鈩?A
mA/碌A(chǔ)
BEEPER OUT
NC
ICL7149 (MQFP)
TOP VIEW
LO BAT/V
F
0
/DP
1
G
1
/E
1
G
0
/E
0
A
1
/D
1
B
1
/C
1
A
0
/D
0
B
0
/C
0
V
REF
6
LO鈩?/div>
HI鈩?/div>
DEINT
7
8
9
COMMON 10
INT 1 11
INT V/鈩?12
TRIPLE POINT 13
C
AZ
14
C
INT
15
BEEPER OUT 16
mA/碌A(chǔ) 17
V/鈩?A 18
HI鈩?DC/LO鈩?AC 19
HOLD 20
24
10
11
23
12 13 14 15 16 17 18 19 20 21 22
NC
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
|
Copyright
漏
Intersil Corporation 1999
File Number
3088.1
3-33
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