AD5647R

双通道， 12位/ 14位/ 16位nanoDACs用5ppm的/ C片参考， I2C接口 Dual, 12-/14-/16-Bit nanoDACs with 5ppm/C On-Chip Ref, I2C Interface

Product Details

The AD5627R//AD5667R, AD5627/AD5667 members of the _nano_DAC® family are low power, dual, 12-, 14-, 16-bit buffered voltage-out DACs with/without on-chip reference. All devices operate from a single 2.7 V to 5.5 V supply, are guaranteed monotonic by design, and have an I2C-compatible serial interface.

The AD5627R/AD5647R/AD5667R, AD5627/AD5667 have an on-chip reference. The AD5627RBCPZ, AD5647RBCPZ, and AD5667RBCPZ have a 1.25 V, 5 ppm/°C reference, giving a full-scale output range of 2.5 V; the AD5627RBRMZ and AD5667RBRMZ have a 2.5 V, 5 ppm/°C reference, giving a full-scale output range of 5 V. The on-chip reference is off at power-up, allowing the use of an external reference. The internal reference is enabled via a software write. The AD5667 and AD5627 require an external reference voltage to set the output range of the DAC.

The AD5627R/AD5647R/AD5667R, AD5627/AD5667 incorporate a power-on reset circuit that ensures the DAC output powers up to 0 V, and remains there until a valid write takes place. 

The device contains a per-channel power-down feature that reduces the current consumption of the device to 480 nA at 5 V and provides software-selectable output loads while in power-down mode. The low power consumption of this device in normal operation makes it ideally suited to portable battery-operated equipment. The on-chip precision output amplifier enables rail-to-rail output swing.

The AD5627R/AD5647R/AD5667R, AD5627/AD5667 use a 2-wire I2C-compatible serial interface that operates in standard 100 kHz, fast 400 kHz, and high speed 3.4 MHz modes.

**Applications**

* Process control

* Data acquisition systems

* Portable battery-powered instruments

* Digital gain and offset adjustment

* Programmable voltage and current sources

* Programmable attenuators

Data Sheet, Rev. 0, 1/07

### Features and Benefits

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Low power, smallest pin-compatible, dual _nano_DACs

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AD5627R/AD5647R/AD5667R

12-/14-/16-bit

On-chip 1.25 V/2.5 V, 5 ppm/°C reference

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AD5627/AD5667

12-/16-bit

External reference only

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3 mm x 3 mm LFCSP and 10-lead MSOP

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2.7 V to 5.5 V power supply

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Guaranteed monotonic by design

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Power-on reset to zero scale

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Per channel power-down

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Hardware LDAC and CLR functions

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I2C-compatible serial interface supports standard 100 kHz, fast 400 kHz, and high speed 3.4 MHz modes