Advanced Linear Devices ALD521D
The ALD521D is a digital controller designed to interface to the ALD500 or ALD500R integrating dual slope analog processors as a chip set for building a precision analog-to-digital converter. With the ALD521D and ALD500R, together with a few external capacitors and resistors, a precision Analog to Digital converter with auto zero and auto-polarity can be implemented. The ALD521D can operate in either a stand-alone mode or in an external microprocessor control mode.| Part No. | ALD521D |
|---|---|
| Datasheet | ALD521D Download |
| Manufacturer |  Advanced Linear Devices |
| Description | 24 BIT SERIAL INTERFACE DIGITAL CONTROLLER |
| Buy | Stock & Price |
APPLICATIONS
● Operate in conjunction with ALD500/ALD500R Precision analog signal processors● High accuracy DC voltage measurement functions
● Portable battery operated instruments
● PC-based software control or stand-alone operation (without other processors or PC)
● Serial digital output interface to other microprocessors or microcontrollers
GENERAL DESCRIPTION
In the stand-alone mode, the ALD521D can either making continuous measurements or a single measurement. Under external microprocessor control, the ALD521D can directly interact with a PC under PC software control via a standard parallel printer port with no other components, or it can also communicate with other microcontrollers serially. The ALD500/ALD500R analog processors consist of on-chip digital control circuitry to accept control inputs, integrating buffer amplifiers, analog switches, and voltage comparators. It functions in four operating modes, or phases, namely auto zero, integrate, deintegrate, and integrator zero phases.
