Overview
The AD7849AR-REEL, produced by Analog Devices Inc., is a 14-bit/16-bit serial input multiplying digital-to-analog converter (DAC). This component is designed to provide excellent differential linearity performance and guaranteed monotonicity to 14 bits for the A grade and to 16 bits for all other grades over specified temperature ranges. The AD7849 features a versatile serial interface and is available in 20-pin DIP and 20-pin SOIC packages, making it suitable for various control and instrumentation applications.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 14-bit/16-bit | - | - |
| Input High Voltage (VINH) | 2.4 | V | min |
| Input Low Voltage (VINL) | 0.8 | V | max |
| Input Current (IINH) | ±10 | μA | max |
| Input Capacitance (CIN) | 10 | pF | max |
| Output Low Voltage (VOL) | 0.4 | V | max, ISINK = 1.6 mA |
| Output High Voltage (VOH) | 4.0 | V | min, ISOURCE = 400 μA |
| Supply Voltage (VDD) | 14.25/15.75 | V | min/max |
| Output Resistance | 0.3 | Ω | typ |
| Short-Circuit Current | ±25 | mA | typ |
| Load Capability | 2 kΩ in parallel with 200 pF | - | - |
Key Features
- Guaranteed Monotonicity: Ensured to 14 bits for the A grade and to 16 bits for all other grades over specified temperature ranges.
- Output Control: Output control on power-up and power-down, with internal or external control options.
- Versatile Serial Interface: Facilitates opto-isolator applications and allows daisy-chain configuration for multichannel systems.
- DAC Coding: Supports straight binary and 2's complement coding, allowing the DAC to reset to 0 V in both unipolar and bipolar output ranges.
- Output Stage Stability: Ensures output stability during power-up and power-down sequences, preventing uncontrolled actuator movement.
- Package Options: Available in 20-pin DIP and 20-pin SOIC packages.
Applications
- Industrial Process Controls: Suitable for precise control in industrial environments.
- PC Analog I/O Boards: Used in PC-based analog input/output systems.
- Instrumentation: Ideal for various instrumentation applications requiring high precision and reliability.
Q & A
- What is the resolution of the AD7849AR-REEL?
The AD7849AR-REEL has a resolution of 14-bit or 16-bit.
- What are the input voltage levels for the AD7849AR-REEL?
The input high voltage (VINH) is 2.4 V min, and the input low voltage (VINL) is 0.8 V max.
- What is the maximum input current for the AD7849AR-REEL?
The maximum input current (IINH) is ±10 μA.
- What is the load capability of the AD7849AR-REEL's output stage?
The output stage can drive a 2 kΩ load in parallel with 200 pF.
- How does the AD7849AR-REEL handle power-up and power-down sequences?
During power-up and power-down, the VOUT pin is clamped to 0 V via a low impedance path to ensure output stability.
- What are the package options for the AD7849AR-REEL?
The AD7849AR-REEL is available in 20-pin DIP and 20-pin SOIC packages.
- Can the AD7849AR-REEL be used in daisy-chain configurations?
Yes, the AD7849AR-REEL supports daisy-chain configurations for multichannel systems.
- What coding options are available for the AD7849AR-REEL?
The AD7849AR-REEL supports straight binary and 2's complement coding.
- What are some typical applications of the AD7849AR-REEL?
The AD7849AR-REEL is typically used in industrial process controls, PC analog I/O boards, and various instrumentation applications.
- How does the AD7849AR-REEL ensure monotonicity?
The AD7849AR-REEL ensures monotonicity to 14 bits for the A grade and to 16 bits for all other grades over specified temperature ranges.
