Intersil Corporation ICL7149, ICL7139 Datasheet

August 1997

ICL7139, ICL7149

33/4 Digit,

Autoranging Multimeter

Features

• 13 Ranges - ICL7139

- 4 DC Voltage 400mV, 4V, 40V, 400V

- 1 AC Voltage 400V

- 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 Dec­imal Points and 11 Annunciators

• No Additional Active Components Required

• Low Power Dissipation - Less than 20mW - 1000 Hour
Typical Battery Life

• Display Hold Input

• Continuity Output Drives Piezoelectric Beeper

• Low Battery Annunciator with On-Chip Detection

• Guaranteed Zero Reading for 0V Input on All Ranges

Pinouts

ICL7139, ICL7149 (PDIP)

TOP VIEW

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 “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.

Ordering Information

TEMP.

PART NUMBER

ICL7139CPL 0 to 70 40 Ld PDIP E40.6
ICL7149CPL 0 to 70 40 Ld PDIP E40.6
ICL7149CM44 0 to 70 44 Ld MQFP Q44.10x10

RANGE (oC) PACKAGE PKG. NO.

ICL7149 (MQFP)

TOP VIEW

BP2
BP1

V+

V

REF

LOΩ

HIΩ

DEINT

INT 1

C

AZ

C

INT

V/Ω/A

HOLD

1
2
3
4

V-

5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20

40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21

ADG

3/E3

B3/C

3

F2/DP

3

G2/E

2

A2/D

2

B2/C

2

F1/DP

2

G1/E

1

A1/D

1

B1/C

1

F0/DP

1

G0/E

0

A0/D

0

B0/C

0

LO BAT/V
MΩ/µA
Ω/A
k/m
OSC IN
OSC OUT

A2/D
G2/E

F2/DP

B3/C

ADG

3/E3

POL/AC

NC
BP2
BP1

V+

NC

2

2

/C

/DP

2

1

B

F

44 43 42 41 40

2
2
3
3

1

2
3
4
5
6
7
8
9

10
11

12 13 14 15 16 17

V-

REF

V

| Copyright © Intersil Corporation 1999

POL/AC

COMMON

INT V/Ω

TRIPLE POINT

BEEPER OUT

mA/µA

IΩ-DC/LOΩ-AC

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207

3-33

1

1

1

/E

/D

/C

1

1

1

G

A

B

HIΩ

LOΩ

DEINT

1

0

0

0

/E

/D

0

G

INT 1

0

A

INT V/Ω

/C

0

B

NC

2221201918

AZ

C

TRIPLE POINT

/DP

0

F

39 38 37 36 35 34

COMMON

LO BAT/V

33
32
31
30
29

28
27
26
25
24
23

INT

C

MΩ/µA
Ω/A
k/m
OSC IN
OSC OUT
HOLD
HIΩ-DC/LOΩ-AC
V/Ω/A
mA/µA
BEEPER OUT
NC

File Number 3088.1

Functional Block Diagram

ICL7139, ICL7149

SWITCHES

CRYSTAL

OSC

DIGITAL COMMON

POWER
SUPPLY

SECTION

V+ V- COM

ANALOG SWITCHES, INTEGRATION

CONTROL LOGIC

INCLUDING

AUTORANGING LOGIC

COUNTERS

ANALOG SECTION

AND COMPARATOR

EXTERNAL

RESISTORS

AND CAPACITORS

BEEPER

DRIVER

DISPLAY

DRIVER

AND

LATCHES

PIEZO

ELECTRIC

BEEPER

DISPLAY

3-34

ICL7139, ICL7149

Absolute Maximum Ratings Thermal Information

Supply Voltage (V+ to V-) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V

Reference Input Voltage (V

Analog Input Current (IN + Current or IN + Voltage) . . . . . . . 100µA

Clock Input Swing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V+ to V+ -3

to COM) . . . . . . . . . . . . . . . . . . . 3V

REF

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.

NOTE:

1. θJA is measured with the component mounted on an evaluation PC board in free air.

Thermal Resistance (Typical, Note 1) 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)

Electrical Specifications V+ = 9V, T

Crystal = 120kHz. (See Figure 14)

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

Zero Input Reading VIN or IIN or RIN = 0.00 -00.0 - +00.0 V, I, Ω
Linearity (Best Straight Line) (Note 6) (Notes 1 and 8) -1
Accuracy DC V, 400V Range Only (Notes 1 and 8) - - ±1 % of RDG ±1
Accuracy DC V, 400V Range Excluded (Notes 1 and 8) - - ±0.30 % of RDG ±1
Accuracy Ω, 4K and 400K Range (Notes 1 and 8) - - ±0.75 % of RDG ±8
Accuracy Ω, 4K and 4M Range (Notes 1 and 8) - - ±1 % of RDG ±9
Accuracy DC I, Unadjusted for Full Scale (Notes 1 and 8) - - ±0.75 % of RDG ±1
Accuracy DC I, Adjusted for Full Scale (Notes 1 and 8) - ±0.2 - % of RDG ±1
Accuracy AC V At 60Hz (Notes 5, 7, and 8) - ±2 - % of RDG
Open Circuit Voltage for Ω Measurements R
Noise VIN = 0, DC V (Note 2, 95% of Time) - 0.1 - LSB
Noise VIN = 0, AC V (Note 2, 95% of Time) - 4 - LSB
Supply Current VIN = 0, DC Voltage Range - 1.5 2.4 mA
Analog Common (with Respect to V+) I
Temperature Coefficient of Analog Common I
Output Impedance of Analog Common I
Backplane/Segment Drive Voltage Average DC < 50mV 2.8 3.0 3.2 V
Backplane/Segment Display Frequency - 75 - Hz
Switch Input Current VIN = V+ to V- (Note 3) -50 - +50 µA
Switch Input Levels (High Trip Point) V+ - 0.5 - V+ V
Switch Input Levels (Mid Trip Point) V- + 3 - V+ - 2.5 V
Switch Input Levels (Low Trip Point) V- - V- + 0.5 V
Beeper Output Drive (Rise or Fall Time) C
Beeper Output Frequency - 2 - kHz
Continuity Detect Range = Low Ω, V
Power Supply Functional Operation V+ to V- 7 9 11 V
Low Battery Detect V+ to V- (Note 4) 6.5 7 7.5 V

NOTES:

1. Accuracy is defined as the worst case deviation from ideal input value including: offset, linearity, and rollover error.

2. Noise is defined as the width of the uncertainty window (where the display will flicker) between two adjacent codes.

3. Applies to pins 17-20.

4. Analog Common falls out of regulation when the Low Battery Detect is asserted, however the ICL7139 and ICL7149 will continue to
operate correctly with a supply voltage above 7V and below 11V.

5. For 50Hz use a 100kHz crystal.

6. Guaranteed by design, not tested.

7. ICL7139 only.

8. RDG = Reading.

= 25oC, V

A

UNKNOWN

COMMON
COMMON
COMMON

LOAD

adjusted for -3.700 reading on DC volts, test circuit as shown in Figure 3.

REF

-

= Infinity - V

< 10µA 2.7 2.9 3.1 V
< 10µA, Temp. = 0oC T o 70oC - -100 - ppm/oC
< 10µA-110Ω

= 10nF - 25 100 µs

= 1.00V - 1.5 - kΩ

REF

REF

+1 Counts

-V

3-35

Timing Waveform

UNDERRANGE

UNDERRANGE

UNDERRANGE

ICL7139, ICL7149

FIRST AUTO ZERO

FIRST INTEGRATE

FIRST DEINTEGRATE

AUTO ZERO

SECOND AUTO ZERO

SECOND INTEGRATE

SECOND DEINTEGRATE

AUTO ZERO

THIRD AUTO ZERO

THIRD INTEGRATE

THIRD DEINTEGRATE

AUTO ZERO

FOURTH AUTO ZERO

FOURTH INTEGRATE

FOURTH DEINTEGRATE

AUTO ZERO

0123456789101112131415161718192021222324

FIGURE 1. LINE FREQUENCY CYCLES (1 CYCLE = 1000 INTERNAL CLOCK PULSES = 2000 OSCILLATION CYCLES)

Pin Descriptions

I/O PIN NUMBER DESCRIPTION

O 1 Segment Driver POL/AC
O 2 Backplane 2
O 3 Backplane 1

I4V+
I5V-

I 6 Reference Input
O7LoΩ
O8HiΩ

I/O 9 Deintegrate
I/O 10 Analog Common

I 11 Int I

I 12 Int V/Ω

I 13 Triple Point

I 14 Auto Zero Capacitor (CAZ)

I 15 Integrate Capacitor (C
O 16 Beeper Output

I17mA/µA

I18Ω/V/A

I19HiΩ DC/LoΩ AC

INT

)

I/O PIN NUMBER DESCRIPTION

I 20 Hold

O 21 Oscillator Out

I 22 Oscillator In
O 23 Segment DRIVER k/m
O 24 Segment Driver Ω/A
O 25 Segment Driver M Ω/µA
O 26 Segment Driver Lo Bat/V
O 27 Segment Driver B0/C
O 28 Segment Driver A0/D
O 29 Segment Driver G0/E
O 32 Segment Driver A1/D
O 33 Segment Driver G1/E
O 34 Segment Driver F1/DP
O 35 Segment Driver B2/C
O 39 Segment Driver B3/C
O 40 Segment Driver ADG3/E

NOTE: For segment drivers, segments are listed as (segment for
backplane 1)/(segment for backplane 2). Example: pin 27; segment
B0 is on backplane 1, segment C0 is on backplane 2.

0
0
0
1
1

1
1
3

3

3-36