The AD5668 device is a low power, octal, 16-bit, buffered voltage-output DAC. The device operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design.
The AD5668 has an on-chip reference with an internal gain of 2. The AD5668-1 has an 1.25 V 5 ppm/°C reference, giving a full-scale output range of 2.5 V; the AD5668-2, -3 has a 2.5 V 5 ppm/°C reference, giving a full-scale output range of 5 V. The on-board reference is off at power-up, allowing the use of an external reference. The internal reference is enabled via a software write.
The part incorporates a power-on reset circuit that ensures that the DAC output powers up to 0 V (AD5668-1, -2) or midscale (AD5668-3) and remains powered up at this level until a valid write takes place. The part contains a power-down feature that reduces the current consumption of the device to 400 nA at 5 V and provides software-selectable output loads while in power-down mode for any or all DAC channels.
The outputs of all DACs can be updated simultaneously using the LDAC function, with the added functionality of user-selectable DAC channels to simultaneously update. There is also an asynchronous CLR that updates all DACs to a user-programmable code—zero scale, midscale, or full scale.
The AD5668 utilizes a versatile 3-wire serial interface that operates at clock rates of up to 50 MHz and is compatible with standard SPI®, QSPI™, MICROWIRE™, and DSP interface standards. The on-chip precision output amplifier enables rail-to-rail output swing.
The AD5668-EP supports defense and aerospace applicatons (AQEC)Product Highlights
|Title||Content Type||File Type|
|Octal, 12-/14-/16-Bit SPI Voltage Output denseDAC with 5 ppm/°C On-Chip Reference Data Sheet (Rev G, 01/2013) (pdf)||Data Sheets|
|AD5668-EP: Octal, 16-Bit DAC with 5 ppm/°C On-Chip Reference in 14-Lead TSSOP Data Sheet (Rev 0, 11/2010) (pdf, 465 kB)||Data Sheets|
|AD5668-DSCC: Microcircuit, Linear, Octal, 16-Bit DAC with 5 ppm/°C On-Chip Reference, Monolithic Silicon Military Data Sheet (Rev A, 11/2012) (pdf)||Data Sheets|
|CN-0183: Precision 16-Bit, Bipolar Output Voltage Source with +12 V to ±5 V Supply (pdf, 252 kB)||Circuit Note|
|CN-0182: A Single-Supply, Low Power Programmable Window Detector (pdf, 249 kB)||Circuit Note|
|UG-155: Evaluation Board for the AD5668 Octal, 16-Bit, Serial Voltage Output DAC (pdf, 733 kB)||User Guides|
|Programmable Current and Voltage Output Drivers (pdf, 1369 kB)||Overview|
|Analog Devices extends its denseDAC™ family of data converters||Overview||HTML|
Extending the denseDAC™ Multichannel D/As
(pdf, 1100 kB)
denseDAC multichannel D/As are Analog Devices digital-to-analog converters with 8 to 40 channels, offering 12-bit to 16-bit resolution.
|Digital to Analog Converters ICs Solutions Bulletin (pdf)||Solutions Bulletins|
|RAQs index||Rarely Asked Questions||HTML|
|Glossary of EE Terms||Glossary||HTML|
|Title||Content Type||File Type|
|AD5668 IBIS Model (ibs)||IBIS Models||IBS|
|AD5668 - Microcontroller No-OS Driver||Device Drivers||HTML|
|AD5668 FMC-SDP Interposer & Evaluation Board / Xilinx KC705 Reference Design||FPGA HDL||HTML|
|BeMicro FPGA Project for AD5668 with Nios driver||FPGA HDL||HTML|
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