The AD5628 is a low-power, 8-channel, 12-bit, buffered voltage output DAC that operates from a single 2.7 V to 5.5 V supply and is designed to be monotonious. The AD5628 is available in 4 mm × 4 mm LFCSP and 16-pin TSSOP packages.
The AD5628 has a built-in on-chip reference with an internal gain of 2. The AD5628-1 has a built-in 1.25 V, 5 ppm/°C reference with a full-scale output range of 2.5 V; The AD5628-2 has a built-in 2.5 V, 5 ppm/°C reference with a full-scale output range of 5 V. When powered on, the on-chip reference is turned off, allowing the use of an external reference. The internal voltage reference is enabled via software write.
The device has a built-in power-on reset circuit that ensures that the DAC output is powered up to 0 V and maintains that level until a valid write operation is performed. It also features independent shutdown for each channel, reducing the device's power consumption to 400 nA at 5 V in shutdown mode and providing a software-selectable output load.
The /LDAC function allows you to update all DAC outputs at the same time, and you can also select the DAC channel to update at the same time. There is also an asynchronous/CLR function that can update all DACs to user-programmable code: zero, medium or full scale.
The AD5628 features a versatile three-wire serial interface that is capable of operating at clock rates up to 50 MHz and is compatible with standard SPI®, QSPI™, MICROWIRE™, and DSP interface standards. It has a built-in on-chip precision output amplifier that enables rail-to-rail output swing.
Product features:
• Eight-channel 12-bit DAC.
• 1.25 V/2.5 V, 5 ppm/ºC on-chip reference source.
• Available in 14-pin/16-pin TSSOP packages.
• Power-on reset to 0 V.
• Shutdown function. In shutdown mode, the DAC typically consumes 200 nA at 3 V and 400 nA at 5 V.
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•process control
• Portable battery-powered meter
• Digital gain and offset voltage adjustment
• Programmable voltage and current sources
• Programmable attenuators