Overview
The AD7840JNZ, produced by Analog Devices Inc., is a fast and complete 14-bit voltage output Digital-to-Analog Converter (DAC). This component integrates a 14-bit DAC, a 3V buried Zener reference, a DAC output amplifier, and high-speed control logic. It is designed for high-performance applications requiring precise analog output signals. The AD7840JNZ is fabricated using linear compatible CMOS (LC2MOS) technology, which combines precision bipolar circuits with low-power CMOS logic, ensuring high reliability and quality.
Key Specifications
| Parameter | Value | Units | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 14 bits | ||
| Analog Output Range | ±3 V | ||
| Signal to Noise Ratio (SNR) | 76 dB min (Typically 82 dB at +25°C) | dB | VOUT = 1 kHz Sine Wave, fSAMPLE = 100 kHz |
| Total Harmonic Distortion (THD) | -78 dB max (Typically -84 dB at +25°C) | dB | VOUT = 1 kHz Sine Wave, fSAMPLE = 100 kHz |
| Peak Harmonic or Spurious Noise | -78 dB max | dB | VOUT = 1 kHz Sine Wave, fSAMPLE = 100 kHz |
| Data Setup Time | 21 ns | ns | |
| Maximum Serial Data Clock Rate | 6 MHz | MHz | |
| Package Types | 24-pin PDIP, 28-terminal PLCC |
Key Features
- Double-buffered interface logic with a 14-bit input latch and 14-bit DAC latch, allowing data to be loaded in either parallel or serial mode.
- Fast data setup time of 21 ns, enabling direct parallel interfacing to digital signal processors and high-speed 16-bit microprocessors.
- High-speed control logic and the ability to handle serial data clock rates up to 6 MHz.
- Bipolar output range of ±3 V and full power output signals up to 20 kHz.
- Fabricated in linear compatible CMOS (LC2MOS) technology, combining precision bipolar circuits with low-power CMOS logic.
- Fully specified for dynamic performance parameters such as signal-to-noise ratio, harmonic distortion, and traditional DC specifications.
Applications
- High-performance data acquisition systems.
- Digital signal processing and control systems.
- Aerospace and military applications due to its high reliability and quality standards.
- Industrial automation and control systems requiring precise analog output signals.
- Medical and scientific instrumentation where high accuracy and dynamic performance are crucial.
Q & A
- What is the resolution of the AD7840JNZ DAC?
The AD7840JNZ has a resolution of 14 bits.
- What is the analog output range of the AD7840JNZ?
The analog output range is ±3 V.
- What are the key dynamic performance specifications of the AD7840JNZ?
The key dynamic performance specifications include a signal-to-noise ratio (SNR) of 76 dB min, total harmonic distortion (THD) of -78 dB max, and peak harmonic or spurious noise of -78 dB max.
- What are the packaging options for the AD7840JNZ?
The AD7840JNZ is available in 24-pin PDIP and 28-terminal PLCC packages.
- Can the AD7840JNZ be used in high-speed applications?
- What technology is used to fabricate the AD7840JNZ?
The AD7840JNZ is fabricated using linear compatible CMOS (LC2MOS) technology, which combines precision bipolar circuits with low-power CMOS logic.
- What are some typical applications of the AD7840JNZ?
Typical applications include high-performance data acquisition systems, digital signal processing, aerospace and military applications, industrial automation, and medical and scientific instrumentation.
- How is data loaded into the AD7840JNZ?
Data can be loaded into the AD7840JNZ in either parallel or serial mode, controlled by the LDAC signal.
- What is the significance of the double-buffered interface logic in the AD7840JNZ?
The double-buffered interface logic allows for seamless data transfer between the input latch and the DAC latch, ensuring that only the data in the DAC latch determines the analog output.
- How does the AD7840JNZ ensure high reliability and quality?
Analog Devices Inc. emphasizes high quality and reliability through rigorous quality and reliability checks in every stage of product and process design, as well as in the manufacturing process.
