5 V 18-Bit
nanoDAC
TM
in a SOT-23
AD5680
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 鈭?0擄C to +105擄C
FUNCTIONAL BLOCK DIAGRAM
V
REF
GND
V
DD
V
FB
POWER-ON
RESET
OUTPUT
BUFFER
DAC
REGISTER
REF(+)
18-BIT
DAC
V
OUT
INPUT
CONTROL
LOGIC
Closed-loop process control
Low bandwidth data acquisition systems
Portable battery-powered instruments
Gain and offset adjustment
Precision setpoint control
SYNC
SCLK
DIN
Figure 1.
GENERAL DESCRIPTION
The AD5680, a member of the
nanoDAC
family, is a single,
18-bit buffered voltage-out 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鈥檚 inverting input is available to the user.
The AD5680 uses a versatile 3-wire serial interface that operates
at clock rates up to 30 MHz, and is compatible with standard
SPI廬, QSPI鈩? MICROWIRE鈩? and DSP interface standards.
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
18 bits of resolution.
12-bit accuracy guaranteed for 18-bit DAC.
Available in an 8-lead SOT-23.
Low power. Typically consumes 1.6 mW at 5 V.
Power-on reset to zero scale or to midscale.
RELATED DEVICES
AD5662
16-bit DAC in SOT-23.
Rev. 0
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05854-001
APPLICATIONS
AD5680