Overview
The AD7840ARS-REEL is a 14-bit voltage output Digital-to-Analog Converter (DAC) produced by Analog Devices Inc. This device is part of the AD7840 series and is known for its high performance and versatility. The AD7840 features a complete DAC system, including a 14-bit DAC, a 3V buried Zener reference, and a DAC output amplifier. It operates in both parallel and serial data input modes, making it suitable for a wide range of applications. However, it is important to note that the AD7840ARS-REEL is currently obsolete and no longer manufactured.
Key Specifications
| Parameter | Value | Units | Test Conditions |
|---|---|---|---|
| Resolution | 14 bits | - | - |
| Operating Temperature Range | –25°C to +85°C | °C | - |
| Supply Voltage (VDD) | +5 V ± 5% | V | - |
| Supply Voltage (VSS) | –5 V ± 5% | V | - |
| Reference Voltage (REF IN) | +3 V | 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 |
Key Features
- High-resolution 14-bit DAC with voltage output
- 3V buried Zener reference for stable output
- DAC output amplifier for direct voltage output
- Parallel and serial data input modes
- Level-triggered control signals for data loading
- High dynamic performance with low THD and high SNR
Applications
The AD7840ARS-REEL is suitable for various applications requiring high-precision analog output, such as:
- Industrial control systems
- Aerospace and defense systems
- Medical devices
- Audio and video equipment
- Automotive systems
Q & A
- What is the resolution of the AD7840ARS-REEL DAC?
The AD7840ARS-REEL has a resolution of 14 bits. - What are the operating temperature ranges for the AD7840ARS-REEL?
The operating temperature range is –25°C to +85°C. - What are the supply voltage requirements for the AD7840ARS-REEL?
The supply voltage requirements are +5 V ± 5% for VDD and –5 V ± 5% for VSS. - Can the AD7840ARS-REEL operate in both parallel and serial data input modes?
Yes, the AD7840ARS-REEL can operate in both parallel and serial data input modes. - What is the typical Signal to Noise Ratio (SNR) of the AD7840ARS-REEL?
The typical SNR is 82 dB at +25°C. - Is the AD7840ARS-REEL still in production?
No, the AD7840ARS-REEL is obsolete and no longer manufactured. - What is the reference voltage for the AD7840ARS-REEL?
The reference voltage is +3 V. - How is data loaded into the AD7840ARS-REEL in parallel mode?
In parallel mode, data is loaded using the CS and WR control signals. - What are the dynamic performance characteristics of the AD7840ARS-REEL?
The AD7840ARS-REEL has high dynamic performance with low THD and high SNR. - What are some typical applications for the AD7840ARS-REEL?
Typical applications include industrial control systems, aerospace and defense systems, medical devices, audio and video equipment, and automotive systems.
