Achieve 32-Channel Programmable Voltage and Excellent Temperature Drift Performance Using ADI AD5382 DAC

Publisher:数字航海家Latest update time:2011-03-31 Source: EEWORLD Reading articles on mobile phones Scan QR code
Read articles on your mobile phone anytime, anywhere

Circuit Function and Benefits

This circuit is a multichannel DAC configuration with excellent temperature drift performance. It provides 32 independent voltage channels with 14-bit resolution and a typical temperature stability of less than 3 ppm/°C.

Circuit Description

Figure 1 shows a typical configuration of the AD5382 using an external reference. In the circuit shown, all AGND, SIGNAL_GND, and DAC_GND pins are tied together and to a common AGND pin. On the AD5382 device, AGND and DGND are tied together. At power-up, the AD5382 defaults to operating with an external reference.

This design uses two separate 5.0 V supplies, one for the reference and analog portion of the AD5382 (AVDD), and the other for the digital portion of the AD5382 (DVDD). For best performance, always use a linear regulator to drive the analog portion of the circuit. If a switching regulator is used to drive the digital portion, care should be taken to minimize switching noise on the DVDD supply pin. Additional decoupling with series ferrite beads may also be required. The AD5382 digital (DVDD) supply can be either 3 V or 5 V, which allows for great flexibility when interfacing with digital components. If the power is derived from a linear regulator, the two supply pins can be tied together and connected to a common 5 V supply. Refer to the ADIsimPower™ design tool for guidance on power supply design.

It is recommended to use 0.1 µF ceramic capacitors and 10 µF tantalum capacitors to decouple the power supplies close to the device. In this circuit, the reference voltage for the AD5382 is derived from an external 2.5 V reference source, the ADR421 or ADR431. The ADR431 has a lower output voltage noise and is suitable for applications where this feature is particularly important. The reference source should be decoupled at the REFOUT/REFIN pins of the device with a 0.1 µF capacitor.

Common Variations

A variation of this circuit is to use the 1.2 V reference source ADR280 for the AD5382-3, with all other connections and components being the same as described above.

Reference address:Achieve 32-Channel Programmable Voltage and Excellent Temperature Drift Performance Using ADI AD5382 DAC

Previous article:Achieve 40-Channel Programmable Voltage and Excellent Temperature Drift Performance Using ADI AD5381 DAC
Next article:ADI AD5382 channel monitoring function

Recommended ReadingLatest update time:2024-11-17 00:41

Taking DAC0832 as an example, explain the difference between single buffering and double buffering of D/A?
Taking DAC0832 as an example, the difference between single buffer and double buffer of D/A is explained. Answer: If there is only one D/A conversion in the application system or if there are multiple conversions but synchronous output is not required, a single buffer interface is used. When the address line selects
[Microcontroller]
XMEGA128 Study Notes 10-Digital-to-Analog Conversion DAC
Features: 1. 12-bit accuracy 2. Conversion speed up to 1M/s 3. Continuous drive or hold output 4. Built-in offset and gain calibration 5. High drive capability   Updated to the latest version CVAVR2.05.2, with DAC function, but limited to 4K code. http://www.hpinfotech.ro/ This example uses the latest versio
[Microcontroller]
XMEGA128 Study Notes 10-Digital-to-Analog Conversion DAC
MAX5591 Quickly Interfaces DAC to PIC Microcontroller
Abstract: This design guide shows how to quickly interface the MAX5591 DAC to a PIC18F442 microcontroller and provides code examples. About the MAX5591 The MAX5591 is a 12-bit, fast-settling DAC that uses a 3-wire SPI™ serial interface. The MAX5591 supports SPI interfaces up to 20MHz with a minimum settling ti
[Analog Electronics]
MAX5591 Quickly Interfaces DAC to PIC Microcontroller
Latest Analog Electronics Articles
Change More Related Popular Components

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

About Us Customer Service Contact Information Datasheet Sitemap LatestNews


Room 1530, 15th Floor, Building B, No.18 Zhongguancun Street, Haidian District, Beijing, Postal Code: 100190 China Telephone: 008610 8235 0740

Copyright © 2005-2024 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号