ICL7139CPL Intersil, ICL7139CPL Datasheet - Page 12

• Manufacturer Part Number: ICL7139CPL
• Description: IC DMM 3 3/4 DIGIT AUTORANGE
• Manufacturer: Intersil
• Type: Multimeterr

Specifications of ICL7139CPL

• Rohs Status: RoHS non-compliant
• Voltage Supply Source: Dual ±
• Voltage - Supply: ±24V, 2.7 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 40-DIP (0.600", 15.24mm)
• Data Interface: -
• Sampling Rate (per Second): -
• Resolution (bits): -

Reference Voltage Source
A voltage divider connected to V+ and Common is the sim-
plest source of reference voltage. While minimizing external
component count, this approach will provide the same volt-
age tempco as the ICL7139 and ICL7149 Common - about
100PPM/
reference may be used (see Figure 13). The reference volt-
age source output impedance must be
NOTES:
FIGURE 13. EXTERNAL VOLTAGE REFERENCE CONNECTION
ICL8069
1. Crystal is a Statek or SaRonix CX-IV type.
2. Multimeter protection components have not been shown.
3. Display is from LXD, part number 38D8R02H (or Equivalent).
4. Beeper is from muRata, part number PKM24-4A0 (or Equivalent).
V+
o
COMMON
10K
INPUTS
C. To improve the tempco, an ICL8069 bandgap
V+
V/
TO ICL7139 AND ICL7149
A
10K
A
S4A
S5A
10M
mA
1M
V+
V-
FIGURE 14. BASIC MULTIMETER APPLICATION CIRCUIT FOR ICL7139 AND ICL7149
30K-
50K
mA
A
V
DEINTEGRATE
INTEGRATE VOLT/
INTEGRATE CURRENT
REFERENCE INPUT
ANALOG COMMON
A
A
V
S4B
10M
9.9
0.1
2W
10M
10k
1M
1M
TRIPLE POINT
10M
12
11
10
18
17
9
7
8
13
TRIPLE
DEINT
INT (V/ )
LO
HI
INT (I)
COMMON
V/ /A
mA/ A
POINT
R
DElNT
0.1 F
14
C
3.3nF
AZ
EXTERNAL
REFERENCE
/4000.
ICL7139
ICL7149
ICL7139, ICL7149
15
HI -DC/LO -AC
C
INT
21
OSC
OUT
CRYSTAL
OUTPUTS
120kHz
DISPLAY
BEEPER
DRIVE
HOLD
3-44
22
V
OSC
REF
IN
V+
V-
Applications, Examples, and Hints
A complete autoranging 3
Figure 14. The following sections discuss the functions of
specific components and various options.
Meter Protection
The ICL7139 and ICL7149 and their external circuitry should
be protected against accidental application of 110/220V AC
line voltages on the
essary precautions, both the ICL7139 and ICL7149 and their
external components could be damaged under such fault
conditions. For the current ranges, fast-blow fuses should be
used between S5A in Figure 14 and the 0.1
shunt resistors. For the
circuitry is required. However, the 10k
to pin 7 must be able to dissipate 1.2W or 4.8W for short
periods of time during accidental application of 110V or
220V
16
4
5
6
19
20
1-3
23-40
1 F
AC
+
S3
S3
line voltages respectively.
ON/OFF
LO BAT
AC
+
-
V+
V+
S1
9V
BATTERY
and current ranges. Without the nec-
BEEPER
S2 CLOSED: HI -DC
S3 CLOSED: HOLD READING
10k
3
ranges, no additional protection
/
4
TANT
4.7 F
digit multimeter is shown in
mAV A
k M
+
PIN 4
10k
resistor connected
ICL8069
PIN 10
and 9.9