Overview
The AD7841ASZ-REEL, produced by Analog Devices Inc., is an octal 14-bit, parallel input, voltage-output Digital-to-Analog Converter (DAC). This device integrates eight 14-bit DACs on a single monolithic chip, offering output voltages with a full-scale range of ±10 V from reference voltages of ±5 V. The AD7841 is designed for high precision and reliability, making it suitable for various applications requiring multiple analog outputs from digital inputs.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 14 | Bits | |
| Relative Accuracy | ±4 / ±2 LSB max | A & B Versions | |
| Differential Nonlinearity | –0.9/2 ±1 LSB max | Guaranteed Monotonic Over Temperature for All Grades | |
| Output Voltage Settling Time | 31 µs typ | Full-Scale Change to ±1/2 LSB | |
| Slew Rate | 0.7 V/µs typ | Digital-to-Analog Glitch Impulse | |
| Channel-to-Channel Isolation | 99 dB typ | See Terminology | |
| Logic Power Supply (VCC) | 5 V ± 5% | ||
| Analog Power Supplies (VDD, VSS) | +15 V ± 10%, -15 V ± 10% | ||
| Package | 44-Lead MQFP (13.9mm x 10mm) |
Key Features
- Eight 14-bit, buffered voltage-output DACs on a single chip.
- Output voltages with a full-scale range of ±10 V from reference voltages of ±5 V.
- Three separate differential references with buffered inputs.
- Each DAC output is buffered with a gain-of-two amplifier, allowing for external DAC offset voltage insertion via the DUTGND pins.
- Parallel 14-bit data input with control via WR, CS, and DAC address pins (A0-A2).
- Asynchronous clear function to set all analog outputs to an externally defined voltage.
- Available in a 44-lead MQFP package.
Applications
- Automatic Test Equipment
- Process Control
- General Purpose Instrumentation
Q & A
- What is the resolution of the AD7841ASZ-REEL? The AD7841ASZ-REEL has a resolution of 14 bits.
- What is the full-scale output voltage range of the AD7841ASZ-REEL? The full-scale output voltage range is ±10 V from reference voltages of ±5 V.
- How many DACs are integrated on the AD7841ASZ-REEL? The device integrates eight 14-bit DACs.
- What is the package type of the AD7841ASZ-REEL? The AD7841ASZ-REEL is available in a 44-lead MQFP package.
- What are the key applications of the AD7841ASZ-REEL? Key applications include Automatic Test Equipment, Process Control, and General Purpose Instrumentation.
- How is data loaded into the AD7841ASZ-REEL? Data is loaded in parallel 14-bit wide words under the control of the WR, CS, and DAC address pins (A0-A2).
- Can the DAC outputs be updated simultaneously? Yes, all the outputs may be updated simultaneously by taking the LDAC input low.
- What is the settling time for the output voltage? The output voltage settling time is typically 31 µs for a full-scale change to ±1/2 LSB.
- Is there an asynchronous clear function available? Yes, the AD7841ASZ-REEL has an asynchronous clear function to set all analog outputs to an externally defined voltage.
- What is the slew rate of the AD7841ASZ-REEL? The slew rate is typically 0.7 V/µs.
