Overview
The AD7870JNZ is a high-performance, 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is part of the AD7870 series, which includes the AD7870, AD7875, and AD7876. The AD7870JNZ is a complete ADC that integrates a track/hold amplifier, an 8 µs successive approximation ADC, a 3 V buried Zener reference, and versatile interface logic. It features a self-contained internal clock that is laser trimmed for accurate control of conversion time, eliminating the need for external clock timing components. However, an external clock can override the internal clock if necessary.
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 |
| Package Type | 24-Lead PDIP, 28-Lead PLCC |
| Operating Temperature Range | 0°C to 70°C |
| Data Output Formats | Single 12-bit word, two 8-bit bytes, serial data |
| Interface | SPI, Parallel |
Key Features
- High-speed conversion with an 8 µs successive approximation ADC.
- Self-contained internal clock with the option to use an external clock.
- Multiple data output formats: single 12-bit word, two 8-bit bytes, and serial data.
- Fast bus access times and standard control inputs for easy interfacing with microprocessors and digital signal processors.
- DC accuracy specifications including linearity, full-scale, and offset error.
- Dynamic performance parameters such as distortion and signal-to-noise ratio are fully specified.
Applications
The AD7870JNZ is suitable for a variety of applications that require high-speed and accurate analog-to-digital conversion. These include:
- Industrial control systems.
- Medical devices requiring precise signal conversion.
- Aerospace and defense systems where reliability and accuracy are critical.
- Automotive systems for sensor data acquisition.
- Test and measurement equipment.
Q & A
- What is the resolution of the AD7870JNZ ADC?
The AD7870JNZ has a resolution of 12 bits.
- What are the input signal ranges for the AD7870 series?
The AD7870 accepts input signals in the range of ±3 V, while the AD7876 accepts ±10 V, and the AD7875 accepts 0 V to +5 V.
- What are the power supply requirements for the AD7870JNZ?
The AD7870JNZ operates from ±5 V power supplies.
- What are the available package types for the AD7870JNZ?
The AD7870JNZ is available in 24-Lead PDIP and 28-Lead PLCC packages.
- Can the internal clock of the AD7870JNZ be overridden by an external clock?
Yes, the internal clock can be overridden by an external clock if required.
- What are the data output formats supported by the AD7870JNZ?
The AD7870JNZ supports single 12-bit word, two 8-bit bytes, and serial data output formats.
- What is the operating temperature range of the AD7870JNZ?
The operating temperature range is 0°C to 70°C.
- What are some key applications of the AD7870JNZ?
Key applications include industrial control systems, medical devices, aerospace and defense systems, automotive systems, and test and measurement equipment.
- Does the AD7870JNZ have built-in interface logic for easy integration with microprocessors?
Yes, it features versatile interface logic and fast bus access times for easy interfacing with modern microprocessors and digital signal processors.
- What dynamic performance parameters are specified for the AD7870JNZ?
The AD7870JNZ is fully specified for dynamic performance parameters including distortion and signal-to-noise ratio.
