Overview
The AD7875CQ, produced by Analog Devices Inc., is a fast, complete 12-bit analog-to-digital converter (ADC). This component integrates a track-and-hold amplifier, an 8 μs successive approximation ADC, a 3 V buried Zener reference, and versatile interface logic on a single chip. It is designed to operate with a self-contained internal clock, eliminating the need for external clock timing components, although an external clock can be used if required. The AD7875CQ supports various data output formats, including a single 12-bit parallel word, two 8-bit bytes, or serial data, making it compatible with modern microprocessors and digital signal processors.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12-bit |
| Input Range | 0 V to +5 V |
| Conversion Time | 8 μs |
| Data Access Time | 57 ns |
| Power Supply | ±5 V |
| Operating Temperature | −40°C to +85°C |
| Package Types | 24-pin DIP, 28-pin PLCC |
| Power Consumption | −60 mW typical |
Key Features
- Complete 12-bit ADC on a single chip, including internal clock, track-and-hold amplifier, and reference.
- Dynamic specifications for DSP users, including signal-to-noise ratio, harmonic distortion, and intermodulation distortion.
- Fast microprocessor interface with data access times of 57 ns, compatible with modern 8-bit and 16-bit microprocessors and DSPs.
- Supports multiple data output formats: parallel 12-bit word, two 8-bit bytes, or serial data.
- No external clock timing components required, but can be overridden by an external clock if needed.
Applications
The AD7875CQ is suitable for a variety of applications that require high-speed and accurate analog-to-digital conversion. These include:
- Digital Signal Processing (DSP) systems.
- Industrial control systems.
- Medical devices requiring precise signal conversion.
- Aerospace and defense systems where high reliability and accuracy are crucial.
- Automotive systems that need fast and reliable data conversion.
Q & A
- What is the resolution of the AD7875CQ?
The AD7875CQ has a 12-bit resolution. - What is the input voltage range of the AD7875CQ?
The input voltage range is 0 V to +5 V. - How long does the AD7875CQ take to convert an analog signal to digital?
The conversion time is 8 μs. - What is the data access time of the AD7875CQ?
The data access time is 57 ns. - What are the power supply requirements for the AD7875CQ?
The AD7875CQ operates from ±5 V power supplies. - What are the operating temperature ranges for the AD7875CQ?
The operating temperature range is −40°C to +85°C. - What package types are available for the AD7875CQ?
The AD7875CQ is available in 24-pin DIP and 28-pin PLCC packages. - Does the AD7875CQ require external clock timing components?
No, the AD7875CQ has a self-contained internal clock, but it can be overridden by an external clock if needed. - What are the dynamic specifications of the AD7875CQ?
The AD7875CQ is fully specified and tested for ac parameters, including signal-to-noise ratio, harmonic distortion, and intermodulation distortion. - What types of applications is the AD7875CQ suitable for?
The AD7875CQ is suitable for DSP systems, industrial control systems, medical devices, aerospace and defense systems, and automotive systems.
