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CN0029
ADI engineers share their lab work with you in this ‘Circuits from the Lab’ Circuit Note. You can combine these product pairings quickly and with confidence. Please review the disclaimer at the bottom of the page for more information.
Copyright 2008, Analog Devices, Inc. All rights reserved. "Circuits from the Lab" from Analog Devices have been designed and built by Analog Devices engineers. Standard engineering practices have been employed in the design and construction of each circuit, and their function and performance have been tested and verified in a lab environment at room temperature. However, you are solely responsible for testing the circuit and determining its suitability and applicability for your use and application. Accordingly, in no event shall Analog Devices be liable for direct, indirect, special, incidental, consequential or punitive damages due to any cause whatsoever connected to the use of any "Circuits from the Lab". Circuit variations described in the Common Variations section of the document have not necessarily also been built and tested.
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8 to 16 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using the AD5390/AD5391/AD5392 DACs
(CN0029)| Circuit Types: | Multichannel |
| Optimized For: | High Performance, High Precision, Temperature Stability |
| Applications: | Instrumentation, Process Control |
This circuit is a multichannel DAC configuration with excellent temperature drift performance. It utilizes the AD5390/AD5391/AD5392 to provide between 8 and 16 DAC channels with 12 to 14 bits of resolution. The ADR421/ADR431 precision voltage reference ensures that the temperature stability of the circuit is typically less than 3 ppm/°C.
8 to 16 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using the AD5390/AD5391/AD5392 DACs (CN0029)
Figure 1: AD5390/AD5391/AD5392 Typical Configuration with External Reference (Simplified Schematic)
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Figure 1: AD5390/AD5391/AD5392 Typical Configuration with External Reference (Simplified Schematic)
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The AD5390/AD5391 are complete single-supply, 16-channel, 14-bit and 12-bit DACs, respectively. The AD5392 is a complete single-supply, 8-channel, 14-bit DAC. Devices are available both in 64-lead LFCSP and 52-lead LQFP packages. All channels have an on-chip output amplifier with rail-to-rail operation.
Figure 1 shows a typical configuration for the AD5390/ AD5391/AD5392 when configured for use with an external reference. In the circuit shown, all AGND, SIGNAL_GND, and DAC_GND pins are tied together to a common AGND. AGND and DGND are connected together at the AD5390/AD5391/ AD5392 device. On power-up, the AD5390/AD5391/AD5392 defaults to external reference operation.
This design uses two separate 5.0 V power supplies―one to power the voltage reference and the analog portion of the AD5390/AD5391/AD5392 (AVDD) and the other to power the digital portion of the AD5390/AD5391/AD5392 (DVDD). For best performance, a linear regulator should always be used to power the analog portion of the circuit. If a switching regulator is used to power the digital portion, care should be taken to minimize switching noise at the DVDD supply pins. Additional decoupling using a series connected ferrite bead may be required. The AD5390/AD5391/AD5392 digital (DVDD) power supply can operate off a 3 V or 5 V supply, which provides for maximum flexibility when interfacing to digital components. Both supplies can be tied together to a common 5 V supply provided that supply is derived from a linear regular. Refer to the ADIsimPower™ tool for guidance on the power supply designs.
It is recommended to decouple each power pin close to the device with a 0.1 μF ceramic and 10 μF tantalum capacitor. In this application, the reference for the AD5390/AD5391/AD5392 is provided externally from either an ADR421 or ADR431 2.5 V reference. The ADR431 provides a lower output voltage noise specification for applications where this specification is important. The reference should be decoupled at the REFOUT/REFIN pin of the device with a 0.1 μF capacitor.
A variation of this circuit is the AD5390/AD5391/AD5392 with the ADR280 1.2 V reference where all other connections and components are the same as those outlined above.
Contributed June, 2009
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AD5390:
16-Channel 14-Bit 3 V/5 V Single-Supply Voltage-Output DACThe AD5390/AD5391 are complete single-supply, 16-channel, 14-bit and 12-bit DACs, respectively. The AD5392 is a complete single-supply, 8-channel, 14-bit DAC. The devices are available in either a 64-lead LFCSP or a 52-lead LQFP. All channels have an on-chip output amplifier with rail-to-rail operation. All devices include an internal 1.25/2.5 V, 10 ppm/°C reference, an on-chip channel monitor More
Data Sheet Rev C, 01/2009 (pdf 1139kB)
Data Sheet Rev C, 01/2009 (pdf 1139kB) -
AD5391:
16-Channel 12-Bit 3V/5V Single-Supply Voltage-Output DACThe AD5390/AD5391 are complete single-supply, 16-channel, 14-bit and 12-bit DACs, respectively. The AD5392 is a complete single-supply, 8-channel, 14-bit DAC. The devices are available in either a 64-lead LFCSP or a 52-lead LQFP. All channels have an on-chip output amplifier with rail-to-rail operation. All devices include an internal 1.25/2.5 V, 10 ppm/°C reference, an on-chip channel monitor More
Data Sheet Rev C, 01/2009 (pdf 1139kB)
Data Sheet Rev C, 01/2009 (pdf 1139kB) -
AD5392:
8-Channel 14-Bit Single-Supply Voltage-Output DACThe AD5390/AD5391 are complete single-supply, 16-channel, 14-bit and 12-bit DACs, respectively. The AD5392 is a complete single-supply, 8-channel, 14-bit DAC. The devices are available in either a 64-lead LFCSP or a 52-lead LQFP. All channels have an on-chip output amplifier with rail-to-rail operation. All devices include an internal 1.25/2.5 V, 10 ppm/°C reference, an on-chip channel monitor More
Data Sheet Rev C, 01/2009 (pdf 1139kB)
Data Sheet Rev C, 01/2009 (pdf 1139kB) -
ADR280:
1.2 V Ultralow Power High PSRR Voltage ReferenceThe ADR280 is a 1.2 V band gap core reference with excellent line regulation and power supply rejection designed specifically for applications experiencing heavy dynamic supply variations, such as data converter references in GSM, GPRS, and 3G mobile station applications. Devices such as the AD6535 that have an analog baseband IC with on-board baseband, audio codecs, voltage regulators, and More
Data Sheet Rev C, 04/2007 (pdf 842kB)
Data Sheet Rev C, 04/2007 (pdf 842kB) -
ADR421:
Ultraprecision, Low Noise, 2.500 V XFET® Voltage ReferencesThe ADR42x are a series of ultraprecision, second generation eXtra implanted junction FET (XFET) voltage references featuring low noise, high accuracy, and excellent long-term stability in SOIC and MSOP footprints.
Patented temperature drift curvature correction technique and XFET technology minimize nonlinearity of the voltage change with temperature. The XFET architecture offers More
Data Sheet Rev H, 06/2007 (pdf 544kB)
Data Sheet Rev H, 06/2007 (pdf 544kB) -
ADR431:
Ultralow Noise XFET® Voltage References with Current Sink and Source CapabilityThe ADR43x series is a family of XFET voltage references featuring low noise, high accuracy, and low temperature drift performance. Using Analog Devices, Inc., patented temperature drift curvature correction and XFET (eXtra implanted junction FET) technology, voltage change vs. temperature nonlinearity in the ADR43x is minimized.
The XFET references operate at lower current (800 µA) and More
Data Sheet Rev E, 01/2009 (pdf 1847kB)
Data Sheet Rev E, 01/2009 (pdf 1847kB)
Evaluation Boards
- AD5390/AD5391/AD5392 Evaluation Tools
- ADIsimPower™ Voltage Regulator Design Tool This tool supports buck converter designs OPTIMIZED for efficiency, PCB spa...
- ADIsimDDS™ The purpose of this tool is to assist a user in selecting and evaluating An...
- ADIsimPower™ Voltage Regulator Design Tool This tool supports buck converter designs OPTIMIZED for efficiency, PCB spa...
- Voltage Reference Wizard This Wizard helps you select the most suitable voltage for a use with a dat...