AD5624| Datasheet

AD5624, AD5664

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2.7 V to 5.5 V, 450 A, Rail-to-Rail Output, Quad, 12-/16-Bit nanoDACs AD5624/AD5664
FEATURES
Low power, quad nanoDACs AD5664: 16 bits AD5624: 12 bits Relative accuracy: 12 LSBs max Guaranteed monotonic by design 10-lead MSOP and 3 mm 3 mm LFCSP_WD 2.7 V to 5.5 V power supply Power-on reset to zero Per channel power-down Serial interface, up to 50 MHz

FUNCTIONAL BLOCK DIAGRAM
VDD GND VREF

AD5624/AD5664
INPUT REGISTER SCLK INTERFACE LOGIC INPUT REGISTER DAC REGISTER STRING DAC B BUFFER VOUTB DAC REGISTER STRING DAC A BUFFER VOUTA

SYNC

INPUT REGISTER DIN INPUT REGISTER

DAC REGISTER

STRING DAC C

BUFFER

VOUTC

DAC REGISTER

STRING DAC D

BUFFER

VOUTD

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

Figure 1.

Table 1. Related Devices
Part No. AD5624R/AD5644R/AD5664R Description 2.7 V to 5.5 V quad, 12-, 14-, 16-bit DACs with internal reference

GENERAL DESCRIPTION
The AD5624/AD5664, members of the nanoDAC family, are low power, quad, 12-, 16-bit buffered voltage-out DACs that operate from a single 2.7 V to 5.5 V supply and are guaranteed monotonic by design. The AD5624/AD5664 require an external reference voltage to set the output range of the DAC. The part incorporates a poweron reset circuit that ensures the DAC output powers up to 0 V and remains there until a valid write takes place. The parts contain a 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 these parts in normal operation makes them ideally suited to portable battery-operated equipment. The power consumption is 2.25 mW at 5 V, going down to 2.4 W in power-down mode. The AD5624/AD5664 on-chip precision output amplifier allows rail-to-rail output swing to be achieved. The AD5624/AD5664 use a versatile 3-wire serial interface that operates at clock rates up to 50 MHz, a
nd are compatible with standard SPI , QSPITM, MICROWIRETM, and DSP interface standards.

PRODUCT HIGHLIGHTS
1. 2. 3. 4. Relative accuracy: 12 LSBs maximum. Available in 10-lead MSOP and 10-lead, 3 mm 3 mm, LFCSP_WD. Low power, typically consumes 1.32 mW at 3 V and 2.25 mW at 5 V. Maximum settling time of 4.5 s (AD5624) and 7 s (AD5664).

Rev. 0
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05943-001

POWER-ON RESET

POWER-DOWN LOGIC