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Data Sheet
Quad, 12-/14-/16-Bit nanoDACs with 5 ppm/°C On-Chip Reference AD5624R/AD5644R/AD5664R
FEATURES
Low power, smallest pin-compatible, quad nanoDACs AD5664R: 16 bits AD5644R: 14 bits AD5624R: 12 bits
User-selectable external or internal reference External reference default On-chip 1.25 V/2.5 V, 5 ppm/°C reference
10-lead MSOP; 10-lead, 3 mm × 3 mm LFCSP_WD; and 12-ball, 1.665 mm × 2.245 mm WLCSP
2.7 V to 5.5 V power supply Guaranteed monotonic by design Power-on reset to zero scale Per channel power-down Serial interface, up to 50 MHz
APPLICATIONS
Process controls Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators
FUNCTIONAL BLOCK DIAGRAM
VDD
GND
VREFIN/VREFOUT
AD5624R/AD5644R/AD5664R
1.25V/2.5V REF
SCLK SYNC
DIN
INPUT REGISTER
DAC REGISTER
STRING DAC A
BUFFER
VOUTA
INTERFACE LOGIC
INPUT REGISTER
DAC REGISTER
STRING DAC B
BUFFER
INPUT REGISTER
DAC REGISTER
STRING DAC C
BUFFER
VOUTB VOUTC
INPUT REGISTER
DAC REGISTER
STRING DAC D
BUFFER
POWER-ON LOGIC
POWERDOWN LOGIC
Figure 1.
VOUTD
05856-001
Table 1. Related Devices
Part No.
Description
AD5624/AD5664 2.7 V to 5.5 V quad, 12-/16-bit DACs, external reference
AD5666
2.7 V to 5.5 V quad, 16-bit DAC, internal reference, LDAC, CLR pins
GENERAL DESCRIPTION
The AD5624R/AD5644R/AD5664R, members of the nanoDAC® family, are low power, quad, 12-/14-/16-bit buffered voltageout DACs. All devices operate from a single 2.7 V to 5.5 V supply and are guaranteed monotonic by design.
The AD5624R/AD5644R/AD5664R have an on-chip reference. The AD56x4R-3 has a 1.25 V, 5 ppm/°C reference, giving a fullscale output range of 2.5 V; the AD56x4R-5 has 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; all devices can be operated from a single 2.7 V to 5.5 V supply. The internal reference is enabled via a software write.
The part incorporates 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 part contains a per-channel power-down feature that reduces the current consumption of the device to
Rev. D
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480 nA at 5 V and provides software-selectable output loads while in power-down mode. The low power consumption of this part in normal operation makes it ideally suited to portable battery-operated equipment.
The AD5624R/AD5644R/AD5664R use a versatile 3-wire serial interface that operates at clock rates up to 50 MHz, and is compatible with standard SPI, QSPI™, MICROWIRE™, and DSP interface standards. The on-chip precision output amplifier enables rail-to-rail output swing.
PRODUCT HIGHLIGHTS
1. Quad 12-/14-/16-bit DACs. 2. On-chip 1.25 V/2.5 V, 5 ppm/°C reference. 3. Available in 10-lead MSOP; 10-lead, 3 mm × 3 mm
LFCSP_WD; and 12-ball, 1.665 mm × 2.245 mm WLCSP. 4. Low power, typically consumes 1.32 mW at 3 V and
2.25 mW at 5 V.
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AD5624R/AD5644R/AD5664R
TABLE OF CONTENTS
Features .............................................................................................. 1 Applications ...................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications .................................................................................... 3
AD5624R-5/AD5644R-5/AD5664R-5 ...................................... 3 AD5624R-3/AD5644R-3/AD5664R-3 ...................................... 4 AC Characteristics ....................................................................... 6 Timing Characteristics ................................................................ 7 Timing Diagram ........................................................................... 7 Absolute Maximum Ratings ........................................................... 8 ESD Caution...................