Overview
The AD7876TQ is a high-performance, 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is part of the AD7870/AD7875/AD7876 family, known for their completeness and speed in analog-to-digital conversion. The AD7876TQ 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, which can be overridden by an external clock if necessary. This ADC is designed to provide fast bus access times and is compatible with modern microprocessors and digital signal processors.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 12 |
| Input Range | ±10 V |
| Sampling Rate | Up to 100 kHz |
| Input Type | Single Ended |
| Architecture | SAR (Successive Approximation Register) |
| Reference Type | Internal, 3 V buried Zener reference |
| Voltage - Supply, Analog | ±5 V |
| Voltage - Supply, Digital | 5 V |
| Operating Temperature | -55°C to +125°C |
| Package / Case | 24-Lead CERDIP |
| Data Interface | Parallel, Serial, DSP compatible |
Key Features
- Complete ADC on a Chip: Integrates a track-and-hold amplifier, an 8 μs successive approximation ADC, a 3 V buried Zener reference, and versatile interface logic.
- Dynamic Specifications: Fully specified and tested for ac parameters, including signal-to-noise ratio, harmonic distortion, and intermodulation distortion.
- Fast Microprocessor Interface: Data access times of 57 ns make it compatible with modern 8-bit and 16-bit microprocessors and digital signal processors.
- Internal Clock: Self-contained internal clock that can be overridden by an external clock if required.
- Multiple Data Output Formats: Offers a choice of a single, parallel, 12-bit word; two 8-bit bytes; or serial data.
- Temperature Compensation: On-chip temperature-compensated buried Zener reference.
Applications
- Data Acquisition Systems: Ideal for high-speed data acquisition applications requiring precise analog-to-digital conversion.
- Digital Signal Processing (DSP): Suitable for use in DSP systems due to its dynamic performance specifications.
- Industrial Automation: Used in industrial automation for precise measurement and control.
- Medical Devices: Can be used in medical devices that require high accuracy and speed in analog-to-digital conversion.
- Aerospace and Defense: Operates over a wide temperature range, making it suitable for aerospace and defense applications.
Q & A
- What is the resolution of the AD7876TQ ADC?
The AD7876TQ is a 12-bit analog-to-digital converter.
- What are the input voltage ranges for the AD7876TQ?
The AD7876TQ accepts input signals in the range of ±10 V.
- What is the sampling rate of the AD7876TQ?
The AD7876TQ can sample up to 100 kHz.
- What type of architecture does the AD7876TQ use?
The AD7876TQ uses a Successive Approximation Register (SAR) architecture.
- What is the operating temperature range of the AD7876TQ?
The AD7876TQ operates from -55°C to +125°C.
- What types of data output formats does the AD7876TQ support?
The AD7876TQ supports parallel, serial, and DSP-compatible data output formats.
- Does the AD7876TQ have an internal clock?
Yes, the AD7876TQ has a self-contained internal clock that can be overridden by an external clock if necessary.
- What kind of reference does the AD7876TQ use?
The AD7876TQ uses an internal 3 V buried Zener reference.
- What is the package type of the AD7876TQ?
The AD7876TQ is available in a 24-Lead CERDIP package.
- Is the AD7876TQ compatible with modern microprocessors and DSPs?
Yes, the AD7876TQ is compatible with modern 8-bit and 16-bit microprocessors and digital signal processors due to its fast bus access times.
