AD5680_15 Datasheet, PDF (1/20 Pages) Analog Devices – 5 V 18-Bit nanoDAC in a SOT-23

Data Sheet
FEATURES
Single 18-bit nanoDAC
18-bit monotonic
12-bit accuracy guaranteed
Tiny 8-lead SOT-23 package
Power-on reset to zero scale/midscale
4.5 V to 5.5 V power supply
Serial interface
Rail-to-rail operation
SYNC interrupt facility
Temperature range: −40°C to +105°C
APPLICATIONS
Closed-loop process control
Low bandwidth data acquisition systems
Portable battery-powered instruments
Gain and offset adjustment
Precision setpoint control
GENERAL DESCRIPTION
The AD5680, a member of the nanoDAC family, is a single,
18-bit buffered voltage-out digital-to-analog converter (DAC)
that operates from a single 4.5 V to 5.5 V supply and is 18-bit
monotonic.
The AD5680 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
(AD5680-1) or to midscale (AD5680-2) and remains there until
a valid write takes place.
The low power consumption of this part in normal operation
makes it ideally suited to portable battery-operated equipment.
The power consumption is 1.6 mW at 5 V.
The AD5680 on-chip precision output amplifier allows rail-to-
rail output swing to be achieved. For remote sensing applications,
the output amplifier’s inverting input is available to the user.
5 V 18-Bit nanoDAC^®
in a SOT-23
AD5680
FUNCTIONAL BLOCK DIAGRAM
V_REF
GND
V_DD
POWER-ON
RESET
DAC
REGISTER
REF(+)
18-BIT DAC
OUTPUT
BUFFER
V_FB
V_OUT
INPUT
CONTROL
LOGIC
SYNC SCLK DIN
Figure 1.
AD5680
The AD5680 uses a versatile 3-wire serial interface that operates
at clock rates up to 30 MHz, and is compatible with standard
SPI®, QSPI™, MICROWIRE™, and DSP interface standards.
PRODUCT HIGHLIGHTS
1. 18 bits of resolution.
2. 12-bit accuracy guaranteed for 18-bit DAC.
3. Available in an 8-lead SOT-23.
4. Low power; typically consumes 1.6 mW at 5 V.
5. Power-on reset to zero scale or to midscale.
RELATED DEVICES
AD5662—16-bit DAC in SOT-23.
Rev. B
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