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.
θ
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
PARAMETER
Zero Input Reading
V+ = 9V, T
A
= 25
o
C, V
REF
adjusted for -3.700 reading on DC volts, test circuit as shown in Figure 3.
Crystal = 120kHz. (See Figure 14)
TEST CONDITIONS
V
IN
or I
IN
or R
IN
= 0.00
(Notes 1 and 8)
(Notes 1 and 8)
(Notes 1 and 8)
(Notes 1 and 8)
(Notes 1 and 8)
(Notes 1 and 8)
(Notes 1 and 8)
At 60Hz (Notes 5, 7, and 8)
R
UNKNOWN
= Infinity
V
IN
= 0, DC V (Note 2, 95% of Time)
V
IN
= 0, AC V (Note 2, 95% of Time)
V
IN
= 0, DC Voltage Range
I
COMMON
< 10µA
I
COMMON
< 10µA, Temp. = 0
o
C To 70
o
C
I
COMMON
< 10µA
Average DC < 50mV
MIN
-00.0
-1
-
-
-
-
-
-
-
-
-
-
-
2.7
-
-
2.8
-
V
IN
= V+ to V- (Note 3)
-50
V+ - 0.5
V- + 3
V-
C
LOAD
= 10nF
Range = Low
Ω,
V
REF
= 1.00V
V+ to V-
V+ to V- (Note 4)
-
-
-
7
6.5
TYP
-
-
MAX
+00.0
+1
±1
±0.30
±0.75
±1
±0.75
-
-
-
-
-
2.4
3.1
-
10
3.2
-
+50
V+
V+ - 2.5
V- + 0.5
100
-
-
11
7.5
UNITS
V, I,
Ω
Counts
% of RDG
±1
% of RDG
±1
% of RDG
±8
% of RDG
±9
% of RDG
±1
% of RDG
±1
% of RDG
V
LSB
LSB
mA
V
ppm/
o
C
Ω
V
Hz
µA
V
V
V
µs
kHz
kΩ
V
V
Linearity (Best Straight Line) (Note 6)
Accuracy DC V, 400V Range Only
Accuracy DC V, 400V Range Excluded
Accuracy
Ω,
4K and 400K Range
Accuracy
Ω,
4K and 4M Range
Accuracy DC I, Unadjusted for Full Scale
Accuracy DC I, Adjusted for Full Scale
Accuracy AC V
Open Circuit Voltage for
Ω
Measurements
Noise
Noise
Supply Current
Analog Common (with Respect to V+)
Temperature Coefficient of Analog Common
Output Impedance of Analog Common
Backplane/Segment Drive Voltage
Backplane/Segment Display Frequency
Switch Input Current
Switch Input Levels (High Trip Point)
Switch Input Levels (Mid Trip Point)
Switch Input Levels (Low Trip Point)
Beeper Output Drive (Rise or Fall Time)
Beeper Output Frequency
Continuity Detect
Power Supply Functional Operation
Low Battery Detect
-
-
-
-
-
±0.2
±2
V
REF
0.1
4
1.5
2.9
-100
1
3.0
75
-
-
-
-
25
2
1.5
9
7
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.
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