Overview
The AD7876CN, produced by Analog Devices Inc., is a fast, complete 12-bit analog-to-digital converter (ADC) designed for high-performance applications. This ADC 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 operates from ±5 V power supplies and features a self-contained internal clock, eliminating the need for external clock timing components. The AD7876CN is suitable for a wide range of applications requiring precise analog-to-digital conversion.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 12 |
| Input Range | ±10 V |
| Conversion Time | 8 μs |
| Data Output Formats | Parallel (12-bit word), Two 8-bit bytes, Serial |
| Power Supplies | ±5 V |
| Operating Temperature | −40°C to +85°C |
| Package Type | 24-Lead PDIP, 24-Lead SOIC |
| Reference Type | Internal, 3 V buried Zener reference |
| Data Access Time | 57 ns |
Key Features
- Complete 12-bit ADC on a single chip, including track-and-hold amplifier, successive approximation ADC, and internal reference.
- Self-contained internal clock with the option to override with an external clock.
- Fast microprocessor interface with data access times of 57 ns, compatible with modern 8-bit and 16-bit microprocessors and digital signal processors.
- Diverse data output formats: parallel 12-bit word, two 8-bit bytes, or serial data.
- Internal 3 V buried Zener reference, factory trimmed to ±10 mV, and capable of providing up to 500 μA to an external load.
- Dynamic performance specifications including signal-to-noise ratio, harmonic distortion, and intermodulation distortion.
Applications
- Digital signal processing (DSP) systems.
- Data acquisition systems.
- Industrial control systems.
- Medical devices requiring precise analog-to-digital conversion.
- Aerospace and defense applications where high accuracy and reliability are crucial.
Q & A
- What is the resolution of the AD7876CN ADC?
The AD7876CN is a 12-bit analog-to-digital converter.
- What are the input voltage ranges for the AD7876CN?
The AD7876CN accepts input signals in the range of ±10 V.
- What is the conversion time of the AD7876CN?
The conversion time is 8 μs.
- Does the AD7876CN have an internal clock?
Yes, the AD7876CN has a self-contained internal clock, but it can be overridden by an external clock if necessary.
- What are the available data output formats for the AD7876CN?
The data can be output in parallel (12-bit word), two 8-bit bytes, or serial format.
- What is the operating temperature range of the AD7876CN?
The operating temperature range is −40°C to +85°C.
- What type of package is the AD7876CN available in?
The AD7876CN is available in 24-Lead PDIP and 24-Lead SOIC packages.
- Does the AD7876CN have an internal reference voltage?
Yes, it has an internal 3 V buried Zener reference.
- What is the data access time for the AD7876CN?
The data access time is 57 ns.
- Is the AD7876CN suitable for DSP applications?
Yes, it is fully specified and tested for dynamic performance parameters, making it suitable for DSP applications.
