Overview
The ICL7116CMH is a 3½ digit monolithic analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This device is part of the ICL7116 and ICL7117 series, which are designed to offer high accuracy and reliability in various measurement applications. The ICL7116CMH is distinguished by its ability to hold or “freeze” a reading, thanks to its Hold pin, which is a key feature not present in the earlier ICL7106 and ICL7107 models.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | V+ to V- |
| Operating Temperature Range | 0°C to +70°C |
| Storage Temperature Range | -55°C to +160°C |
| Input Leakage Current | 1 to 10 pA |
| Zero Reading Drift | 0.2 to 1 μV/°C |
| Scale Factor Temperature Coefficient | 1 to 5 ppm/°C |
| V+ Supply Current | 0.8 to 1.8 mA |
| V- Supply Current (ICL7117 Only) | 0.6 to 1.8 mA |
| Analog Common Voltage | 2.4 to 3.2 V |
| Temperature Coefficient of Analog Common | 80 ppm/°C |
Key Features
- High-impedance CMOS differential inputs
- Low noise (< 15μV P-P) without hysteresis or overrange hangover
- Clock and reference on-chip
- True differential reference and input
- True polarity indication for precision null applications
- On-board display drive capability—no external circuitry required (LCD for ICL7116, LED for ICL7117)
- Hold pin to freeze readings
- Monolithic CMOS design
Applications
The ICL7116CMH is widely used in digital panel meter applications, including the measurement and display of analog data. It is particularly suitable for precision measurement instruments, process control systems, and any application requiring accurate and stable analog-to-digital conversion with the ability to hold readings.
Q & A
- What is the primary function of the ICL7116CMH?
The primary function of the ICL7116CMH is to convert analog signals to digital readings with high accuracy and reliability. - What is the key difference between the ICL7116 and the earlier ICL7106 models?
The key difference is the presence of a Hold pin in the ICL7116, which allows it to freeze readings. - What is the operating temperature range of the ICL7116CMH?
The operating temperature range is 0°C to +70°C. - What is the input leakage current of the ICL7116CMH?
The input leakage current is between 1 to 10 pA. - Does the ICL7116CMH require external display drive circuitry?
No, it has on-board display drive capability. - What types of displays can the ICL7116 and ICL7117 drive?
The ICL7116 can drive LCD displays, while the ICL7117 can drive LED displays. - What is the significance of the true differential reference and input in the ICL7116CMH?
This feature ensures high accuracy and precision in the conversion process. - Can the input voltages exceed the supply voltages?
Yes, provided the input current is limited to ±100μA. - What is the storage temperature range of the ICL7116CMH?
The storage temperature range is -55°C to +160°C. - What is the typical supply current for the V+ supply?
The typical supply current for the V+ supply is between 0.8 to 1.8 mA.
