Overview
The ICL7107RCPL-3, produced by Analog Devices Inc./Maxim Integrated, is a 3 1/2 digit analog-to-digital converter (ADC) designed for high accuracy and versatility. This monolithic ADC features very high input impedances and includes on-board active components such as polarity and digit drivers, segment decoders, a voltage reference, and a clock circuit. The ICL7107 is specifically designed to directly drive common anode light emitting diode (LED) displays, making it suitable for a variety of applications requiring precise analog-to-digital conversion and display capabilities.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Leakage Current | VIN = 0V | 1 | - | 10 | pA |
| Zero Reading Drift | VIN = 0V, 0°C < T_A < +70°C | 0.2 | - | 1 | μV/°C |
| Scale Factor Temperature Coefficient | VIN = 199.0mV, 0°C < T_A < +70°C (external reference) | 1 | - | 5 | ppm/°C |
| V+ Supply Current | VIN = 0V | 0.8 | - | 1.8 | mA |
| V- Supply Current (ICL7107 Only) | - | 0.6 | - | 1.8 | mA |
| Analog Common Voltage (With Respect to Positive Supply) | 25kΩ between common and positive supply | 2.4 | 2.8 | 3.2 | V |
| Segment Sinking Current (Except pin 19) | V+ = 5.0V, segment voltage = 3V | 5 | - | 8.0 | mA |
| Segment Sinking Current (Pin 19 only) | - | 10 | - | - | mA |
Key Features
- High input impedances, reducing the need for external buffering.
- On-board active components including polarity and digit drivers, segment decoders, a voltage reference, and a clock circuit.
- Direct drive capability for common anode LED displays.
- Dual-slope conversion technique that automatically rejects interference signals common in industrial environments.
- True differential input and reference, useful for ratiometric measurements (e.g., ohms or bridge transducers).
- Zero-integrator phase to eliminate overrange hangover and hysteresis effects.
Applications
The ICL7107RCPL-3 is suitable for various applications requiring precise analog-to-digital conversion and display capabilities. These include:
- Industrial measurement and control systems.
- Medical devices requiring accurate and stable readings.
- Automotive systems needing robust and reliable ADCs.
- Test and measurement equipment where high accuracy is crucial.
Q & A
- What is the resolution of the ICL7107RCPL-3?
The ICL7107RCPL-3 has a resolution of 3 1/2 digits. - What type of display does the ICL7107RCPL-3 drive?
The ICL7107RCPL-3 directly drives common anode light emitting diode (LED) displays. - What is the input leakage current of the ICL7107RCPL-3?
The input leakage current is 1 to 10 pA when VIN = 0V. - What is the supply current for the ICL7107RCPL-3?
The V+ supply current is 0.8 to 1.8 mA, and the V- supply current is 0.6 to 1.8 mA. - Does the ICL7107RCPL-3 have built-in noise rejection?
Yes, it uses a dual-slope conversion technique that automatically rejects interference signals common in industrial environments. - What is the temperature coefficient of the analog common voltage?
The temperature coefficient of the analog common voltage is 80 ppm/°C. - What are the typical segment sinking currents for the ICL7107RCPL-3?
The segment sinking current (except pin 19) is 5 to 8.0 mA, and for pin 19 only, it is 10 mA. - Is the ICL7107RCPL-3 suitable for ratiometric measurements?
Yes, it has true differential input and reference, making it suitable for ratiometric measurements. - What are the package options available for the ICL7107RCPL-3?
The ICL7107 is available in various packages including Plastic Dual-In-Line, Wide (0.6in), Metric Quad Flatpack, and Plastic Leaded Chip Carrier. - Is the ICL7107RCPL-3 still in production?
The part status for some versions of the ICL7107 may be obsolete, but it is still available in production for certain models.
