Overview
The AD7849CRZ is a high-performance, single-channel digital-to-analog converter (DAC) produced by Analog Devices Inc. This component is designed for use in a wide range of applications, particularly where high precision and reliability are crucial. The AD7849CRZ features a 14-bit or 16-bit serial input multiplying DAC architecture, ensuring excellent differential linearity and guaranteed monotonicity over the specified temperature ranges.
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 | ISINK = 1.6 mA |
| Output High Voltage (VOH) | 4.0 | V | ISOURCE = 400 μA |
| Power Supply (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 to 14 bits for the A grade and to 16 bits for all other grades over the specified temperature ranges.
- Versatile serial interface with input serial-to-parallel shift register and DAC latch.
- Output control on power-up and power-down, ensuring the output is clamped to 0 V via a low impedance path.
- Internal or external control options for the output stage.
- Ability to drive a 2 kΩ load in parallel with 200 pF, with configurable gains of 1 or 2 and offset adjustment.
Applications
- Industrial process controls.
- PC analog I/O boards.
- Instrumentation.
Q & A
- What is the resolution of the AD7849CRZ DAC?
The AD7849CRZ has a resolution of 14-bit or 16-bit. - What is the input voltage range for the digital inputs?
The input high voltage (VINH) is 2.4 V min, and the input low voltage (VINL) is 0.8 V max. - What is the typical output resistance of the AD7849CRZ?
The typical output resistance is 0.3 Ω. - Can the AD7849CRZ drive a load in parallel with capacitance?
Yes, it can drive a 2 kΩ load in parallel with 200 pF. - What happens to the output during power-up and power-down sequences?
The output is clamped to 0 V via a low impedance path during these sequences to ensure stability. - What are the configurable gains for the output stage?
The gains can be configured for 1 or 2, and the offset resistor can be used to shift the output range. - What are some typical applications of the AD7849CRZ?
Typical applications include industrial process controls, PC analog I/O boards, and instrumentation. - How does the AD7849CRZ ensure monotonicity?
The DAC architecture ensures guaranteed monotonicity to 14 bits for the A grade and to 16 bits for all other grades over the specified temperature ranges. - What is the purpose of the serial interface in the AD7849CRZ?
The serial interface includes an input serial-to-parallel shift register and a DAC latch, allowing for versatile data loading. - Can the AD7849CRZ be controlled internally or externally?
Yes, the AD7849CRZ offers both internal and external control options for the output stage.
