Overview
The ICL7109CMH+D is a monolithic 12-bit analog-to-digital converter (ADC) designed by Maxim Integrated, now part of Analog Devices Inc. This device is optimized for easy interface with microprocessors and UARTs, making it a versatile component for various data acquisition systems. It features 12-bit binary plus polarity and over-range outputs, which can be directly interfaced to a microprocessor bus. The ICL7109 is known for its high accuracy, low power consumption, and minimal input bias current, making it an attractive option for remote data logging applications and other systems requiring precise analog-to-digital conversion.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 12 bits |
| Output Format | Binary plus polarity and over-range |
| Interface | Direct interface to microprocessor bus, UART handshake mode |
| Accuracy | High accuracy with less than 1 count rollover error and less than 1μV/°C zero reading drift |
| Power Consumption | Low power consumption |
| Input Bias Current | Minimal input bias current |
| Package Types | Plastic Dual-In-Line, Wide (0.6in), Plastic Leaded Chip Carrier |
| Operating Temperature | Varies by package (e.g., ICL7109CPL+ for commercial temperature range) |
Key Features
- High accuracy with reduced rollover error and zero reading drift.
- Low power consumption and minimal input bias current.
- Direct interface to microprocessor bus and UART handshake mode for serial data transmission.
- Zero-integrator phase to eliminate overrange hangover, crosstalk, and hysteresis effects.
- Enhanced current sourcing capabilities to drive large capacitances on microprocessor buses.
Applications
The ICL7109CMH+D is suitable for a variety of applications, including:
- Data acquisition systems where high accuracy and low power consumption are critical.
- Remote data logging applications due to its ability to work in UART handshake mode.
- Systems requiring direct interface to microprocessors and UARTs.
- Analog multiplexing alternatives due to its one-per-channel design and low cost.
Q & A
- What is the resolution of the ICL7109CMH+D?
The ICL7109CMH+D has a resolution of 12 bits. - How does the ICL7109CMH+D interface with microprocessors?
The ICL7109CMH+D can be directly interfaced to a microprocessor bus and also supports UART handshake mode for serial data transmission. - What are the key accuracy features of the ICL7109CMH+D?
The device offers high accuracy with less than 1 count rollover error and less than 1μV/°C zero reading drift. - What are the package options available for the ICL7109CMH+D?
The ICL7109CMH+D is available in Plastic Dual-In-Line, Wide (0.6in), and Plastic Leaded Chip Carrier packages. - Why is the ICL7109CMH+D preferred in data acquisition systems?
The ICL7109CMH+D is preferred due to its high accuracy, low power consumption, and minimal input bias current, making it an attractive option for various data acquisition applications. - How does the zero-integrator phase benefit the ICL7109CMH+D?
The zero-integrator phase eliminates overrange hangover, crosstalk, and hysteresis effects, enhancing the device's performance. - What is the significance of enhanced current sourcing capabilities in the ICL7109CMH+D?
The enhanced current sourcing capabilities allow the device to rapidly drive the large capacitances often found on microprocessor buses. - Can the ICL7109CMH+D be used in remote data logging applications?
Yes, the ICL7109CMH+D is suitable for remote data logging applications due to its ability to work in UART handshake mode. - What are the typical operating temperatures for the ICL7109CMH+D?
The operating temperatures vary by package, with commercial temperature ranges available for certain packages. - Is the ICL7109CMH+D a low-cost alternative in data acquisition systems?
Yes, the ICL7109CMH+D is a low-cost, one-per-channel alternative to analog multiplexing in many data acquisition systems.
