ICL7139, ICL7149
3
3 / Digit,
4
August 1997
Autoranging Multimeter
Features
Description
• 13 Ranges - ICL7139
- 4 DC Voltage 400mV, 4V, 40V, 400V
- 1 AC Voltage 400V
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 “range hunting” 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 4/40kΩ. The high
resistance ranges are 0.4/4MΩ. Resolution on the lowest
range is 1Ω.
- 4 DC Current 4mA, 40mA, 400mA, 4A
- 4 Resistance 4kΩ, 40kΩ, 400kΩ, 4MΩ
• 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 4kΩ, 40kΩ, 400kΩ, 4MΩ
• Autoranging - First Reading is Always on Correct Range
• On-Chip Duplex LCD Display Drive Including Three Dec-
imal Points and 11 Annunciators
Ordering Information
• No Additional Active Components Required
TEMP.
o
• Low Power Dissipation - Less than 20mW - 1000 Hour
Typical Battery Life
PART NUMBER RANGE ( C)
PACKAGE
40 Ld PDIP
40 Ld PDIP
44 Ld MQFP
PKG. NO.
E40.6
ICL7139CPL
ICL7149CPL
ICL7149CM44
0 to 70
0 to 70
0 to 70
• Display Hold Input
• Continuity Output Drives Piezoelectric Beeper
• Low Battery Annunciator with On-Chip Detection
• Guaranteed Zero Reading for 0V Input on All Ranges
E40.6
Q44.10x10
Pinouts
ICL7139, ICL7149 (PDIP)
TOP VIEW
ICL7149 (MQFP)
TOP VIEW
POL/AC
BP2
BP1
V+
1
2
3
4
5
6
7
8
9
40 ADG /E
3 3
39 B /C
3
3
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
F /DP
2
3
2
1
G /E
2
2
2
2
V-
A /D
2
44 43 42 41 40 39 38 37 36 35 34
MΩ/µA
1
A /D
2
33
32
31
30
29
V
2
2
3
3
3
B /C
2
REF
2
3
4
5
6
7
8
9
Ω/A
G /E
2
LOΩ
HIΩ
F /DP
1
F /DP
2
k/m
G /E
1
1
1
1
OSC IN
OSC OUT
HOLD
B /C
3
DEINT
A /D
1
ADG /E
3
COMMON 10
INT 1 11
B /C
1
POL/AC
NC
28
27
26
25
24
23
F /DP
0
HIΩ-DC/LOΩ-AC
V/Ω/A
INT V/Ω 12
G /E
BP2
BP1
V+
0
0
0
0
TRIPLE POINT 13
mA/µA
BEEPER OUT
NC
A /D
0
10
11
C
14
15
B /C
0
AZ
NC
C
LO BAT/V
MΩ/µA
Ω/A
INT
12 13 14 15 16 17 18 19 20 21 22
BEEPER OUT 16
mA/µA 17
V/Ω/A 18
k/m
HIΩ-DC/LOΩ-AC 19
HOLD 20
OSC IN
OSC OUT
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
File Number 3088.1
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