AD5045 Datasheet

Part No.

In Stock

Price

Packaging

SPQ

Marking

MSL

Pins

Temp Range

Package Description

• Low power dual 14-bit DAC, ±1 LSB INL
• Individual voltage reference pins
• Rail-to-rail operation
• 4.5 V to 5.5 V power supply
• Power-on reset to zero scale or midscale
• Power down to 400 nA at 5 V
• 3 power-down functions
• Per channel power-down
• Low glitch upon power-up
• Hardware power-down lockout capability
• Hardware LDAC with software LDAC override function
• CLR function to programmable code
• SDO daisy-chaining option
• 14-lead TSSOP

• Process controls
• Data acquisition systems
• Portable battery-powered instruments
• Digital gain and offset adjustment
• Programmable voltage and current sources
• Programmable attenuators

The AD5045 are low power, dual 14-bit buffered voltage output nanoDAC^® DACs offering relative accuracy specifications of ±1 LSB INL with individual reference pins, and can operate from a single 4.5 V to 5.5 V supply. The AD5045 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. The reference for the AD5045 are supplied from an external pin and a reference buffer is provided on chip. The AD5045 incorporate a power-on reset circuit that ensures the DAC output powers up zero scale or midscale and remains there until a valid write takes place to the device. The AD5045 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. The parts are put into power-down mode over the serial interface. Total unadjusted error for the parts is <2.5 mV. The parts exhibit very low glitch on power-up. 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 clears all DACs to a software-selectable code—0 V, midscale, or full scale. The parts also feature a power-down lockout pin, PDL, which can be used to prevent the DAC from entering power-down under any circumstances over the serial interface.