2.7 V to 5.5 V, 140 µA, Rail-to-Rail
Voltage Output 10-Bit DAC in a SOT-23
Data Sheet
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FEATURES
Single 10-bit DAC
6-lead SOT-23 and 8-lead µSOIC packages
Micropower operation: 140 µA @ 5 V
Power-down to 200 nA @ 5 V, 50 nA @ 3 V
2.7 V to 5.5 V power supply
Guaranteed monotonic by design
Reference derived from power supply
Power-on reset to 0 V
Three power-down functions
Low power serial interface with Schmitt triggered inputs
On-chip output buffer amplifier, rail-to-rail operation
SYNC
interrupt facility
Qualified for automotive applications
APPLICATIONS
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
FUNCTIONAL BLOCK DIAGRAM
Figure 1.
GENERAL DESCRIPTION
The AD5310
1
is a single, 10-bit, buffered voltage output DAC
that operates from a single 2.7 V to 5.5 V supply, consuming
115 µA at 3 V. Its on-chip precision output amplifier allows
rail-to-rail output swing. The AD5310 utilizes a versatile 3-wire
serial interface that operates at clock rates of up to 30 MHz and
is compatible with standard SPI™, QSPI™, MICROWIRE®, and
DSP interface standards.
The reference for AD5310 is derived from the power supply inputs
and, therefore, provides the widest dynamic output range. The
part incorporates a power-on reset circuit that ensures that the
DAC output powers up to 0 V and remains there until a valid
write takes place to the device. The part contains a power-down
feature, which reduces the current consumption of the device to
200 nA at 5 V and provides software-selectable output loads while
in power-down mode. The part is put into power-down mode
over the serial interface.
The low power consumption of this part in normal operation
makes it ideally suited for portable, battery-operated equipment.
The power consumption is 0.7 mW at 5 V, reducing to 1 µW in
power-down mode.
The AD5310 is one of a family of pin-compatible DACs. The
AD5300 is the 8-bit version, and the AD5320 is the 12-bit version.
The AD5300/AD5310/AD5320 are available in 6-lead SOT-23
packages and 8-lead µSOIC packages.
PRODUCT HIGHLIGHTS
1. Available in 6-lead SOT-23 and 8-lead µSOIC packages.
2. Low power, single-supply operation. This part operates
from a single 2.7 V to 5.5 V supply and typically consumes
0.35 mW at 3 V and 0.7 mW at 5 V, making it ideal for
battery-powered applications.
3. The on-chip output buffer amplifier allows the output of
the DAC to swing rail-to-rail with a slew rate of 1 V/µs.
4. Reference derived from the power supply.
5. High speed serial interface with clock speeds of up to 30 MHz.
Designed for very low power consumption. The interface
only powers up during a write cycle.
6. Power-down capability. When powered down, the DAC
typically consumes 50 nA at 3 V and 200 nA at 5 V.
1
Patent pending; protected by U.S. Patent No. 5684481.
