Overview
The AD7840JPZ is a high-performance, 14-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc. This component is part of the AD7840 series and is known for its exceptional accuracy, versatility, and reliability. The AD7840JPZ integrates a 14-bit DAC, a 3V buried Zener reference, a DAC output amplifier, and high-speed control logic. It is fabricated using linear compatible CMOS (LC2MOS) technology, which combines precision bipolar circuits with low power CMOS logic. This DAC is available in a 28-terminal plastic leaded chip carrier (PLCC) package and is suitable for a wide range of applications requiring precise analog voltage outputs.
Key Specifications
| Parameter | Value | Units | Comments |
|---|---|---|---|
| Number of Bits | 14 | ||
| Number of D/A Converters | 1 | ||
| Settling Time | 4 μs | ||
| Output Type | Voltage - Buffered | ||
| Differential Output | No | ||
| Data Interface | Parallel, Serial | ||
| Reference Type | External, Internal | ||
| Voltage - Supply, Analog | ±5 V | ||
| INL/DNL (LSB) | ±2 (Max), ±0.9 (Max) | ||
| Architecture | R-2R | ||
| Operating Temperature | 0°C ~ 70°C | ||
| Signal to Noise Ratio (SNR) | 76 dB min | dB | VOUT = 1 kHz Sine Wave, fSAMPLE = 100 kHz |
| Total Harmonic Distortion (THD) | -78 dB max | dB | VOUT = 1 kHz Sine Wave, fSAMPLE = 100 kHz |
Key Features
- Complete 14-Bit D/A Function: The AD7840JPZ provides a complete function for creating AC signals and DC voltages to 14-bit accuracy, including an on-chip reference, an output buffer amplifier, and a 14-bit D/A converter.
- Dynamic Specifications: Fully specified for dynamic performance parameters such as signal-to-noise ratio and harmonic distortion, in addition to traditional DC specifications.
- Fast and Versatile Interface: Capable of 14-bit parallel and serial interfacing. In parallel mode, it has data setup times of 21 ns and write pulse widths of 45 ns, making it compatible with modern 16-bit microprocessors and digital signal processors. In serial mode, it features a high data transfer rate of up to 6 MHz.
- High Accuracy and Low Noise: Offers exceptional accuracy with low integral non-linearity (INL) and differential non-linearity (DNL), and low noise performance.
- Wide Operating Temperature Range: Operates over a temperature range of 0°C to 70°C.
Applications
The AD7840JPZ is suitable for a wide range of applications across various industries:
- Industrial Automation: Used for precise control of analog processes such as motor speed control, valve positioning, and sensor calibration.
- Telecommunications: Applied in base station equipment, signal processing modules, and test and measurement instruments to improve signal quality and system performance.
- Automotive Electronics: Utilized in automotive testing equipment, sensor simulation, and audio system calibration due to its precision and reliability.
- Instrumentation: Ideal for applications requiring precise analog outputs in measurement and control systems.
Q & A
- What is the resolution of the AD7840JPZ DAC?
The AD7840JPZ has a resolution of 14 bits. - What are the available package options for the AD7840JPZ?
The AD7840JPZ is available in a 28-terminal plastic leaded chip carrier (PLCC) package. - What are the data interface options for the AD7840JPZ?
The AD7840JPZ supports both parallel and serial data interfaces. - What is the settling time of the AD7840JPZ?
The settling time of the AD7840JPZ is 4 μs. - What is the operating temperature range of the AD7840JPZ?
The AD7840JPZ operates over a temperature range of 0°C to 70°C. - What are the typical applications of the AD7840JPZ?
The AD7840JPZ is used in industrial automation, telecommunications, automotive electronics, and instrumentation. - What is the signal-to-noise ratio (SNR) of the AD7840JPZ?
The signal-to-noise ratio (SNR) of the AD7840JPZ is typically 76 dB min. - What is the total harmonic distortion (THD) of the AD7840JPZ?
The total harmonic distortion (THD) of the AD7840JPZ is typically -78 dB max. - Does the AD7840JPZ have an internal reference?
Yes, the AD7840JPZ has both internal and external reference options. - What is the maximum serial data clock rate for the AD7840JPZ?
The maximum serial data clock rate for the AD7840JPZ is up to 6 MHz.
