Overview
The AD7870KNZ is a 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is part of the AD7870 series, known for its high-speed and precision conversion capabilities. The AD7870KNZ features a complete ADC system, including a track/hold amplifier, a successive approximation ADC, and a 3 V buried Zener reference. It also includes versatile interface logic and an internal clock, which can be overridden by an external clock if necessary. This ADC is designed to operate from ±5 V power supplies and supports various input signal ranges, making it versatile for different applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Sampling Rate | 100 kHz |
| Input Signal Range | ±3 V (AD7870), ±10 V (AD7876), 0 V to +5 V (AD7875) |
| Power Supply | ±5 V |
| Conversion Time | 8 µs (successive approximation ADC) |
| Data Output Formats | Single 12-bit word, two 8-bit bytes, or serial data |
| Package Type | 24-pin PDIP, 28-pin PLCC, 24-pin SOIC |
Key Features
- Self-contained internal clock with the option to override with an external clock.
- Fast bus access times and standard control inputs for easy interfacing with microprocessors and digital signal processors.
- High dc accuracy specifications including linearity, full-scale, and offset error.
- Dynamic performance parameters such as distortion and signal-to-noise ratio are fully specified.
- Supports full power signal conversion up to 50 kHz.
- Versatile data output formats: single 12-bit word, two 8-bit bytes, or serial data.
Applications
The AD7870KNZ is suitable for a variety of applications requiring high-speed and precise analog-to-digital conversion. These include:
- Industrial control systems
- Medical devices
- Aerospace and defense systems
- Automotive systems
- Data acquisition systems
Q & A
- What is the resolution of the AD7870KNZ ADC?
The AD7870KNZ has a 12-bit resolution.
- What is the sampling rate of the AD7870KNZ?
The sampling rate is 100 kHz.
- What are the input signal ranges supported by the AD7870KNZ?
The AD7870 supports ±3 V input signal range, while other models in the series support ±10 V and 0 V to +5 V.
- What power supply does the AD7870KNZ require?
The AD7870KNZ operates from ±5 V power supplies.
- What is the conversion time of the AD7870KNZ?
The conversion time is 8 µs using successive approximation ADC.
- What data output formats are supported by the AD7870KNZ?
The AD7870KNZ supports single 12-bit word, two 8-bit bytes, or serial data output formats.
- What package types are available for the AD7870KNZ?
The AD7870KNZ is available in 24-pin PDIP, 28-pin PLCC, and 24-pin SOIC packages.
- Can the internal clock of the AD7870KNZ be overridden?
- What are the key accuracy specifications of the AD7870KNZ?
The key accuracy specifications include linearity, full-scale, and offset error.
- What dynamic performance parameters are specified for the AD7870KNZ?
The dynamic performance parameters include distortion and signal-to-noise ratio.
