ICL7107 ADC Display Driver: Price, Application and Datasheet
Renesas Electronics America Inc.
Tube Active 3.5 Digit b Special Purpose ADCs/DACs 5V V 40-DIP (0.600, 15.24mm) Through Hole









Tube Active 3.5 Digit b Special Purpose ADCs/DACs 5V V 40-DIP (0.600, 15.24mm) Through Hole
Hello everyone, this is Rose. In today's post, we will detail the introduction to ICL7107. ICL7107 is an ADC display driver. This article mainly introduce price, application, datasheet and other detailed information about Renesas Semiconductor ICL7107.

digital voltmeter using icl7107
ICL7107 Description
ICL7107 is a high performance, low power, monolithic IC used for analog to digital conversions up to 31/2 digits. It houses display drive circuitry inside it bypassing the need of connecting an external drive circuit.
The input impedance is quite high. Polarity and digital drivers, segment decoders, voltage reference, and a clock circuit is already available on its board. ICL7107 is designed to connect LED display directly to it.
The ADC uses a dual-slope conversion technique which inherently rejects interference signals from the ambiance. Rollover error is minimized less than one count which makes ICL7107 highly accurate.
ICL7107 Pinout

ICL7107 CAD Model
Symbol

Footprint

3D Model

ICL7107 Features
• Guaranteed zero reading for 0V input on all scales
• True polarity at zero for precise null detection
• 1pA typical input current
• True differential input and reference, direct display drive
- LED lCL7107
• Low noise - less than 15µVP-P
• On-chip clock and reference
• Low power dissipation - typically less than 10mW
• No additional active circuits required
• Enhanced display stability
• Pb-free (RoHS compliant)
Specifications
- TypeParameter
- Factory Lead Time10 Weeks
- Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Through Hole - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
40-DIP (0.600, 15.24mm) - Surface Mount
having leads that are designed to be soldered on the side of a circuit board that the body of the component is mounted on.
NO - Usage LevelCommercial grade
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
0°C~70°C - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Tube - Published2000
- JESD-609 Code
The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.
e3 - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Number of Terminations40
- TypeDisplay Driver
- Terminal Finish
Terminal Finish refers to the surface treatment applied to the terminals or leads of electronic components to enhance their performance and longevity. It can improve solderability, corrosion resistance, and overall reliability of the connection in electronic assemblies. Common finishes include nickel, gold, and tin, each possessing distinct properties suitable for various applications. The choice of terminal finish can significantly impact the durability and effectiveness of electronic devices.
Matte Tin (Sn) - Voltage - Supply
Voltage - Supply refers to the range of voltage levels that an electronic component or circuit is designed to operate with. It indicates the minimum and maximum supply voltage that can be applied for the device to function properly. Providing supply voltages outside this range can lead to malfunction, damage, or reduced performance. This parameter is critical for ensuring compatibility between different components in a circuit.
5V - Terminal Position
In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.
DUAL - Number of Functions1
- Supply Voltage
Supply voltage refers to the electrical potential difference provided to an electronic component or circuit. It is crucial for the proper operation of devices, as it powers their functions and determines performance characteristics. The supply voltage must be within specified limits to ensure reliability and prevent damage to components. Different electronic devices have specific supply voltage requirements, which can vary widely depending on their design and intended application.
5V - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
ICL7107 - Pin Count
a count of all of the component leads (or pins)
40 - JESD-30 Code
JESD-30 Code refers to a standardized descriptive designation system established by JEDEC for semiconductor-device packages. This system provides a systematic method for generating designators that convey essential information about the package's physical characteristics, such as size and shape, which aids in component identification and selection. By using JESD-30 codes, manufacturers and engineers can ensure consistency and clarity in the specification of semiconductor packages across various applications and industries.
R-PDIP-T40 - Number of Channels2
- Number of Analog In Channels1
- Output Bit Code
Output Bit Code refers to the digital representation of the output signal of an electronic component, typically in binary form. It indicates the specific combination of bits that represent the output value of the component. The output bit code is crucial for interpreting and processing the output data accurately in digital systems. By understanding the output bit code, engineers can design appropriate circuits and algorithms to manipulate and utilize the output information effectively.
BINARY - Output Format
Output formats are used to determine which data is exported and how data is displayed in many areas of OLIB.
PARALLEL, WORD - Voltage Supply Source
A voltage source is a two-terminal device which can maintain a fixed voltage. An ideal voltage source can maintain the fixed voltage independent of the load resistance or the output current. However, a real-world voltage source cannot supply unlimited current. A voltage source is the dual of a current source.
Single Supply - Negative Supply Voltage-Nom
The parameter "Negative Supply Voltage-Nom" in electronic components refers to the nominal voltage level that can be safely applied as the negative supply voltage to the component. This parameter is important for ensuring the proper functioning and reliability of the component within its specified operating conditions. It indicates the voltage level that the component is designed to operate with when a negative voltage supply is required. It is crucial to adhere to this specified voltage range to prevent damage to the component and maintain its performance characteristics.
-5V - Resolution (Bits)
Resolution (Bits) in electronic components refers to the number of bits used to represent the analog signal in digital form. It indicates the level of detail or precision with which the analog signal can be converted into digital data. A higher resolution means more bits are used, allowing for finer distinctions to be made between different signal levels. For example, an 8-bit resolution can represent 256 different levels, while a 16-bit resolution can represent 65,536 levels. In general, a higher resolution leads to better accuracy and fidelity in the digital representation of the original analog signal.
3.5 Digit - Length51.75mm
- Height Seated (Max)
Height Seated (Max) is a parameter in electronic components that refers to the maximum allowable height of the component when it is properly seated or installed on a circuit board or within an enclosure. This specification is crucial for ensuring proper fit and alignment within the overall system design. Exceeding the maximum seated height can lead to mechanical interference, electrical shorts, or other issues that may impact the performance and reliability of the electronic device. Manufacturers provide this information to help designers and engineers select components that will fit within the designated space and function correctly in the intended application.
6.35mm - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant
Where to use ICL7107?
The ICL7107 is an ADC module with a resolution of 3 ½ bit, meaning it can display digital value from 0-1999. The ADC used here is a dual slop ADC, so the applied voltage is compared with a reference voltage and then is approximated to find the applied voltage. The speciality of this IC is that it has an in-built 4-digit 7-segment display driver inside it. So to display the measured voltage we simply have to hook up 7-segment display to the output of the IC and everything is ready. IT eliminates the need for MCU/MPU or programming.
The IC can measure voltages of maximum from -15V to +15V which is equal to the supply voltage. The digital output can vary from 0-1999 where each digit is displayed on a single 7-segment display. So if you are trying to measure voltage and display them on a 7-segment display without the use of MCU or programming then this IC might be the right choice for you.
How to use ICL7107?
Using ICL7107 is pretty straight forward, we just have to provide the reference voltage and set the internal clock for the ADC conversion to take place and we are all set. A basic sample circuit to measure voltage upto 200mV is shown below

The IC has an internal clock which can be set using the pins 38, 39 and 40 by using a Resistor capacitor network. The formulae to calculate the set oscillator frequency is shown below; typically the value is set to 48 kHz
FOSC = 0.45/RC
Once the clock is set we have to provide the reference voltage for the ADC conversion to take place. The value of the measured analog voltage will then be displayed on the 7-segment display the increment of count can be calculated using the following formulae

The accuracy and the range of the measured voltage can be measured by using external circuits involving potential divider or op-amps but as always there is a trade off between the accuracy and range. You can refer the datasheet at the end of this page to know more technical details.
ICL7107 Digital Section

ICL7107 Applications
●Used in digital voltmeter
●Used in digital ammeter
●Used in instrument panel display
●Used in applications based upon non-programming modules.
ICL7107 Package

ICL7107 Manufacturer
Renesas Electronics Corporation is a Japanese semiconductor manufacturer headquartered in Tokyo, Japan, initially incorporated in 2002 as Renesas Technology, the consolidated entity of the semiconductor units of Hitachi and Mitsubishi excluding their dynamic random-access memory businesses.
In the 2000s to early 2010s, Renesas had been one of the six largest semiconductor companies in the world. As of 2014, it was the world's largest automotive semiconductor maker and the world's largest maker of microcontrollers. The company also has presences in the markets of analogue and mixed-signal integrated circuits, memory devices, and SoCs.
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Datasheet PDF
- Datasheets :
- ConflictMineralStatement :
1.What is ICL7107?
Special IC for digital voltmeter head, which can be used to make digital meter head. With additional circuit, it can be used to measure voltage, current, resistance, capacitance, inductance, frequency, temperature, humidity, etc. Most digital multimeters use this chip.
2.What is the difference between ICL7106 and ICL7107?
ICL7106 and ICL7107 are three-and-a-half digit A/D converters. ICL7106 series are equipped with liquid crystal display panels and work with a single 9V power supply. ICL7107 series are equipped with light-emitting digital tube (LED) display panels and work with positive and negative 5V dual power supplies.
3.What is the function of the TEST pin of ICL7107?
The TEST (pin 37) of the 7107 is the lamp test pin. When the level is increased to TEST, all the fields of the 3 and a half digital tubes are lit, that is, 1888 is displayed. The TEST pin is useless under normal working conditions and should be connected to the low level.
4.How to solve ICL7107 single power supply?
You can use 555 time base circuit or MC34063 chip to connect a negative voltage generator to generate a -5V voltage. It is recommended to use MC34063, which generates -5V very stable.
5.Which chip can replace the ICL7107 chip?
You can use ICL7106 to instead. ICL7106 is suitable for LCD display, while ICL7107 is used for LED display.
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Renesas Electronics America Inc.
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