Fully Accurate, Quad, 16-Bit, Buffered V, 4.5 V to 5.5 V DAC with SPI Interface

The AD5024 / AD5044 / AD5064 are low power, quad 12-/14-/ 16-bit buffered voltage output nanoDAC® DACs that offer relative accuracy specifications of 1 LSB INL and 1 LSB DNL with individual reference pins and can operate from a single 4.5 V to 5.5 V supply. The AD5024 / AD5044 / AD5064 parts also offer a differential accuracy specification of ±1 LSB. The parts use a versatile 3-wire, low power Schmitt trigger serial interface that operates at clock rates up to 50 MHz and is compatible with standard SPI, QSPI™, MICROWIRE™, and DSP interface standards. Integrated reference buffers and output amplifiers are also provided on-chip. The AD5024 / AD5044 / AD5064 / AD5064-1 incorporate a power-on reset circuit that ensures the DAC output powers up to zero scale or midscale and remains there until a valid write takes place to the device. The AD5024 / AD5044 / AD5064 / AD5064-1 contain a power-down feature that reduces the current consumption of the device to typically 400 nA at 5 V and provides software selectable output loads while in power- down mode. Total unadjusted error for the parts is <2 mV.

Product Highlights

* Quad channel available in 16-lead TSSOP package.

* 16-bit accurate, 1 LSB INL.

* Low glitch on power-up.

* High speed serial interface with clock speeds up to 50 MHz.

* Reset to known output voltage (zero scale or midscale).

Applications

* Process control

* Data acquisition systems

* Portable battery-powered instruments

* Digital gain and offset adjustment

* Programmable voltage and current sources

* Programmable attenuators

* Low power quad 12-/14-/16-bit DAC, ±1 LSB INL

* Pin compatible and performance upgrade to AD5666

* Individual and common voltage reference pin options

* Rail-to-rail operation

* 4.5 V to 5.5 V power supply

* Power-on reset to zero scale or midscale

* 3 power-down functions and per-channel power-down

* Hardware LDAC with software LDAC override function

* CLR function to programmable code

* SDO daisy-chaining option

* 14-/16-lead TSSOP

* Internal reference buffer and internal output amplifier