Octal, 14-Bit D/A Converter With 5 Ppm/°C On-Chip Reference In 14-Lead TSSOP

AD5628 AD5648 AD5668 devices are low power, octal, 12-/14-/16-bit, buffered voltage-output DACs All devices operate from a single 2.7 V to 5.5 V supply and are guaranteed monotonic by design.
The AD5628 AD5648 AD5668 have an on-chip reference with an internal gain of 2. The AD5628 AD5648 AD5668-1 have a 1.25 V 5 ppm/C reference, giving a full-scale output range of 2.5 V; the AD5628 AD5648 AD5668-2, -3 have 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 AD5628 AD5648 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 codezero scale, midscale, or full scale.
The AD5628 AD5648 AD5668 utilize 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.
Product Highlights 1. Octal, 12-/14-/16-bit DAC 2. On-chip 1.25 V/2.5 V, 5 ppm/C reference. 3. Available in 14-lead/16-lead TSSOP. 4. Power-on reset to 0 V or midscale. 5. Power-down capability. When powered down, the DAC typically consumes 200 nA at 3 V and 400 nA at 5 V.
Applications Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable Attenuators
By Analog Devices, Inc.
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AD5648 pinout,Pin out
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