3
Scale Factor Temperature Coefficient V
IN
= 408.9mV = > 7770
8
Reading Ext. Ref. 0ppm/
o
C
(Note 4)
- 1 5 ppm/
o
C
REFERENCE VOLTAGE
Ref Out Voltage, V
REF
Referred to V+, 25kΩ Between V+ and REF OUT -2.4 -2.8 -3.2 V
Ref Out Temperature Coefficient 25kΩ Between V+ and REF OUT (Note 4) - 80 - ppm/
o
C
POWER SUPPLY CHARACTERISTICS
Supply Current V+ to GND, I+ V
IN
= 0V, Crystal Osc 3.58MHz Test Circuit - 700 1500 µA
Supply Current V+ to V-, I
SUPP
Pins 2 - 21, 25, 26, 27, 29; Open - 700 1500 µA
Digital Electrical Specifications V+ = +5V, V- = -5V, GND = 0V, T
A
= 25
o
C, Unless Otherwise Specified
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DIGITAL OUTPUTS
Output High Voltage, V
OH
I
OUT
= 100µA Pins 2 - 16, 18, 19, 20 3.5 4.3 - V
Output Low Voltage, V
OL
I
OUT
= 1.6mA Pins 2 - 16, 18, 19, 20 - ±0.20 ±0.40 V
Output Leakage Current Pins 3 - 16 High Impedance - ±0.01 ±1 µA
Control I/O Pullup Current Pins 18, 19, 20 V
OUT
= V+ -3V MODE Input at GND
(Note 4)
-5- µA
Control I/O Loading HBEN
Pin 19 LBEN Pin 18 (Note 4) - − 50 pF
DIGITAL INPUTS
Input High Voltage, V
IH
Pins 18 - 21, 26, 27 Referred to GND 3.0 - - V
Input Low Voltage, V
IL
Pins 18 - 21, 26, 27 Referred to GND - - 1 V
Input Pull-Up Current Pins 26, 27 V
OUT
= (V+) -3V - 5 - µA
Input Pull-Up Current Pins 17, 24 V
OUT
= (V+) -3V - 25 - µA
Input Pull-Down Current Pin 21 V
OUT
= GND +3V - 5 - µA
TIMING CHARACTERISTICS
MODE Input Pulse Width, t
W
(Note 4) 50 - - ns
NOTES:
1. Input voltages may exceed the supply voltages provided the input current is limited to ±100µA.
2. Due to the SCR structure inherent in the process used to fabricate these devices, connecting any digital inputs or outputs to voltages
greater than V+ or less than GND may cause destructive device latchup. For this reason it is recommended that no inputs from sources
other than the same power supply be applied to the ICL7109 before its power supply is established, and that in multiple supply systems
the supply to the ICL7109 be activated first.
3. This limit refers to that of the package and will not be obtained during normal operation.
4. This parameter is not production tested, but is guaranteed by design.
5. Roll-over error for T
A
= -55
o
C to 125
o
C is ±10 counts (Max).
6. A full scale voltage of 2.048V is used because a full scale voltage of 4.096V exceeds the devices Common Mode Voltage Range.
7. For CERDIP package the Ratiometric error can be -4 (Min).
Analog Electrical Specifications V+ = +5V, V- = -5V, GND = 0V, T
A
= 25
o
C, f
CLK
= 3.58MHz,
Unless Otherwise Specified (Continued)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ICL7109
