AD5663 Datasheet, PDF (1/24 Pages) Analog Devices – 2.7 V to 5.5 V, 250 uA, Rail-to-Rail Output, Dual 16-Bit nanoDAC

2.7 V to 5.5 V, 250 μA, Rail-to-Rail Output,
Dual 16-Bit nanoDAC^®
AD5663
FEATURES
Low power, dual 16-bit nanoDAC
Relative accuracy: ±12 LSBs maximum
Guaranteed monotonic by design
10-lead MSOP and 3 mm × 3 mm LFCSP_WD
2.7 V to 5.5 V power supply
Per channel power-down
Power-on reset to zero scale or midscale
Hardware LDAC and CLR functions
Serial interface; up to 50 MHz
APPLICATIONS
Process control
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
GENERAL DESCRIPTION
The AD5663, a member of the nanoDAC family, is a low power,
dual, 16-bit buffered voltage-out DAC that operates from a single
2.7 V to 5.5 V supply and is guaranteed monotonic by design.
The AD5663 requires an external reference voltage to set the
output range of the DAC. The part incorporates a power-on
reset circuit that ensures the DAC output powers up to 0 V or
midscale (AD5663-1) and remains there until a valid write takes
place. The part contains 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 this part in normal operation
makes it ideally suited to portable, battery-operated equipment.
The power consumption is 1.25 mW at 5 V, going down to
2.4 μW in power-down mode.
The on-chip precision output amplifier of the AD5663 allows
rail-to-rail output swing to be achieved.
The AD5663 uses 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.
SCLK
SYNC
DIN
FUNCTIONAL BLOCK DIAGRAM
V_DD
V_REF
LDAC
INTERFACE
LOGIC
INPUT
REGISTER
DAC
REGISTER
STRING
DAC A
BUFFER
INPUT
REGISTER
DAC
REGISTER
STRING
DAC B
BUFFER
V_OUTA
V_OUTB
LDAC CLR
AD5663
POWER-ON
RESET
GND
Figure 1.
POWER-DOWN
LOGIC
Table 1. Related Devices
Part No.
AD5623R/AD5643R/AD5663R
Description
2.7 V to 5.5 V, dual 12-/14-/16-bit
DACs with internal reference
PRODUCT HIGHLIGHTS
1. Dual 16-bit DAC; relative accuracy of ±12 LSBs maximum.
2. Available in 10-lead MSOP and 10-lead, 3 mm × 3 mm
LFCSP_WD packages.
3. Low power; typically consumes 0.6 mW at 3 V and
1.25 mW at 5 V.
4. 7 μs maximum settling time.
Rev. 0
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