Overview
The AD7849BRZ is a 14-bit/16-bit serial input multiplying digital-to-analog converter (DAC) produced by Analog Devices Inc. This DAC is designed to ensure excellent differential linearity performance and guaranteed monotonicity to 14 bits for the A grade and to 16 bits for all other grades over the specified temperature ranges. The device features a versatile serial interface structure, making it suitable for various applications, including industrial process controls, PC analog I/O boards, and instrumentation.
Key Specifications
| Parameter | Unit | Min/Max | Typical | Test Conditions/Comments |
|---|---|---|---|---|
| Digital Input High Voltage (VINH) | V | 2.4 | Min | |
| Digital Input Low Voltage (VINL) | V | 0.8 | Max | |
| Digital Input Current (IINH) | μA | ±10 | Max | |
| Digital Input Capacitance (CIN) | pF | 10 | Max | |
| Output Low Voltage (VOL) | V | 0.4 | Max, ISINK = 1.6 mA | |
| Output High Voltage (VOH) | V | 4.0 | Min, ISOURCE = 400 μA | |
| Supply Voltage (VDD/VSS) | V | ±14.25/±15.75 | Min/Max | |
| Supply Current (IDD) | mA | 5 | Max, VOUT unloaded | |
| Power Dissipation | mW | 100 | Typical, VOUT unloaded |
Key Features
- 14-bit/16-bit multiplying DAC with guaranteed monotonicity.
- Excellent differential linearity performance.
- Output control on power-up and power-down, with internal or external control options.
- Versatile serial interface structure, facilitating opto-isolator applications.
- SDOUT pin allows daisy-chain configuration for multichannel systems.
- BIN/COMP pin for setting DAC coding (straight binary or 2's complement).
- Available in 20-pin DIP and 20-pin SOIC packages.
Applications
- Industrial process controls.
- PC analog I/O boards.
- Instrumentation.
Q & A
- What is the resolution of the AD7849BRZ DAC?
The AD7849BRZ is a 14-bit/16-bit DAC.
- What is the differential linearity performance of the AD7849BRZ?
The DAC architecture ensures excellent differential linearity performance.
- How does the AD7849BRZ handle power-up and power-down sequences?
During power-up and power-down sequences, the VOUT pin is clamped to 0 V via a low impedance path.
- What types of packages are available for the AD7849BRZ?
The AD7849BRZ is available in 20-pin DIP and 20-pin SOIC packages.
- Can the AD7849BRZ be used in multichannel systems?
- How is the DAC coding set on the AD7849BRZ?
The BIN/COMP pin sets the DAC coding to either straight binary or 2's complement.
- What are the typical supply voltage ranges for the AD7849BRZ?
The supply voltage ranges are ±14.25/±15.75 V for VDD/VSS.
- What is the maximum power dissipation of the AD7849BRZ?
The maximum power dissipation is 100 mW typical, with VOUT unloaded.
- What are some common applications of the AD7849BRZ?
Common applications include industrial process controls, PC analog I/O boards, and instrumentation.
- How does the AD7849BRZ ensure monotonicity?
Monotonicity is guaranteed to 14 bits for the A grade and to 16 bits for all other grades over the specified temperature ranges.
