3
1
⁄2 Digit A/D Converters
ICL7106/ICL7107
General Description
The Maxim ICL7106/ICL7107 are monolithic analog-to-
digital converters (ADCs). They have very high input
impedances and require no external display drive cir-
cuitry. On-board active components include polarity and
digit drivers, segment decoders, voltage reference and
a clock circuit. The ICL7106 will directly drive a nonmulti-
plexed liquid crystal display (LCD), whereas the ICL7107
will directly drive a common anode light emitting diode
(LED) display.
Versatility and accuracy are inherent features of these
converters. The dual-slope conversion technique auto-
matically rejects interference signals common in industri-
al environments. The true differential input and reference
are particularly useful when making ratiometric measure-
ments (ohms or bridge transducers). Maxim has added
a zero-integrator phase to the ICL7106 and ICL7107,
eliminating overrange hangover and hysteresis effects.
Finally, these devices offer high accuracy by lowering
rollover error to less than one count and zero reading
drift to less than 1FV/NC.
These devices are used in a wide range of digital panel
meter applications. Most applications, however, involve
the measurement and display of analog data.
Applications
Features
S Improved 2nd Source (see Page 3 for “Maxim
Advantage”)
S Guaranteed First Reading Recovery from
Overrange
S On-Board Display Drive Capability—No External
Circuitry Required
LCD—ICL7106
LED—ICL7107
S High-Impedance CMOS Differential Inputs
S Low Noise (< 15µV
P-P
) without Hysteresis or
Overrange Hangover
S Clock and Reference On-Chip
S True Differential Reference and Input
S True Polarity Indication for Precision Null
Applications
S Monolithic CMOS Design
Pressure
Voltage
Resistance
Temperature
Conductance
Current
Speed
Material
Thickness
Typical Operating Circuit
Pin Configurations
Order Information
+Denotes a lead(Pb)-free/RoHS-compliant package.
The "Maxim Advantage" signifies an upgraded quality level. At no additional cost we offer a second-source device that is subject to
the following: guaranteed performance over temperature along with tighter test specifications on many key parameters; and device
enhancement, when needed, that result in improved performance without changing the functionality.
19-0948; Rev 1; 1/12
Pin Configurations continued at end of data sheet
PDIP
PART TEMP RANGE PIN-PACKAGE
ICL7106CPL+ 0°C to +70°C 40 PDIP
ICL7106CQH+ 0°C to +70°C 44 PLCC
ICL7107CPL+ 0°C to +70°C 40 PDIP
ICL7107CQH+ 0°C to +70°C 44 PLCC
ICL7106
ANALOG
INPUT
9V
V
REF
TO ANALOG
COMMON (P32)
FULL-SCALE INPUT
2.000V
200.0mV
V
REF
1.000V
100.0mV
LCD DISPLAY
AVAILABLE
Functional Diagrams
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximLQWHJUDWHG.com.
ICL7106/7107
+
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
2 Maxim Integrated
3
1
⁄2 Digit A/D Converters
ICL7106/ICL7107
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Supply Voltage
ICL7106, V+ to V- .............................................................. 15V
ICL7107, V+ to GND ........................................................ +6V
ICL7107, V- to GND ...........................................................-9V
Analog Input Voltage (either input) (Note 1) ................. V+ to V-
Reference Input Voltage (either input) ........................... V+ to V-
Clock Input
ICL7106 .................................................................TEST to V+
ICL7107 ................................................................. GND to V+
Continuous Power Dissipation (T
A
= +70NC)(Note 2)
PDIP (derate 16.7mW/NC above +70NC) ................ 1333.3mW
PLCC (derate 13.3mW/NC above +70NC)...............1066.7mW
Operating Temperature Range ............................. 0NC to +70NC
Storage Temperature Range ............................ -55NC to +160NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow)
PDIP .............................................................................+260NC
PLCC ...........................................................................+245NC
ELECTRICAL CHARACTERISTICS
(Note 3)
ABSOLUTE MAXIMUM RATINGS
Note 1: Input voltages may exceed the supply voltages, provided the input current is limited to ±100µA.
Note 2: Dissipation rating assumes device is mounted with all leads soldered to the PCB.
The electrical characteristics above are a reproduction of a portion of Intersil's copyrighted (1983/1984) data book. This information
does not constitute any representation by Maxim that Intersil's products will perform in accordance with these specifications. The
"Electrical Characteristics table" along with the descriptive excerpts from the original manufacturer's data sheet have been included
in this data sheet solely for comparative purposes.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Zero Input Reading V
IN
= 0V, full scale = 200.0mV -000.0 000.0 +000.0
Digital
Reading
Ratiometric Reading V
IN
= V
REF
, V
REF
= 100mV 999 999/1000 1000
Digital
Reading
Rollover Error (Difference in Reading for
Equal Positive and Negative Reading Near
Full Scale)
-V
IN
= +V
IN
= 200.0mV -1 Q2 +1 Counts
Linearity (Maximum Deviation from Best
Straight Line Fit)
Full scale = 200mV or full scale = 2.000V -1 Q2 +1 Counts
Common-Mode Rejection Ratio (Note 4) V
CM
= Q1V, V
IN
= 0V, full scale = 200.0mV 50 FV/V
Noise (Pk-Pk Value Not Exceeded
95% of Time)
V
IN
= 0V, full scale = 200mV 15 FV
Input Leakage Current V
IN
= 0V 1 10 pA
Zero Reading Drift V
IN
= 0V, 0NC < T
A
< +70NC 0.2 1 FV/NC
Scale Factor Temperature Coefficient
V
IN
= 199.0mV, 0NC < T
A
< +70NC
(external reference 0ppm/NC)
1 5 ppm/NC
V+ Supply Current (Does Not Include LED
Current for ICL7107)
V
IN
= 0V 0.8 1.8 mA
V- Supply Current (ICL7107 Only) 0.6 1.8 mA
Analog Common Voltage
(With Respect to Positive Supply)
25kI between common and positive supply 2.4 2.8 3.2 V
Temperature Coefficient of Analog
Common (With Respect to Positive Supply)
25kI between common and positive supply 80 ppm/NC