2.7 V to 5.5 V, 140 µA, Rail-to-Rail

Voltage Output 10-Bit DAC in a SOT-23

Data Sheet

AD5310

Rev. B

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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 AD53101 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.