AD5045BRUZ

ANALOG DEVICES  AD5045BRUZ  数模转换器, 14 bit, 1.5 MSPS, 串行, 4.5V 至 5.5V, TSSOP, 14 引脚

Product Details

The AD5025 / AD5045 / AD5065 are low power, dual 12-/14-/16-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 AD5025 / AD5045 / AD5065 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 AD5025 / AD5045 / AD5065 are supplied from an external pin and a reference buffer is provided on chip. The AD5025 / AD5045 / AD5065 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 AD5025 / AD5045 / AD5065 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.

**Product Highlights**

1. Dual channel available in a 14-lead TSSOP package with individual voltage reference pins.

2. 12-/14-/16-bit accurate, ±1 LSB INL.

3. Low glitch on power-up.

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

5. Three power-down modes available to the user.

6. Reset to known output voltage zero scale or midscale.

7. Power-down lockout capability.

**Applications**

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Process controls

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Data acquisition systems

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Portable battery-powered instruments

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Digital gain and offset adjustment

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Programmable voltage and current sources

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Programmable attenuators

### Features and Benefits

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

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Individual voltage reference pins

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Rail-to-rail operation

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4.5 V to 5.5 V power supply

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Power-on reset to zero scale or midscale

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Power down to 400 nA at 5 V

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3 power-down functions

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Per channel power-down

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Low glitch upon power-up

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Hardware power-down lockout capability

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Hardware LDAC with software LDAC override function

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CLR function to programmable code

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SDO daisy-chaining option

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14-lead TSSOP