2.7 V to 5.5 V, 140 μA, Rail-to-Rail Output

8-Bit DAC in a SOT-23

AD5300

Rev. D

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FEATURES

Single 8-Bit DAC

6-Lead SOT-23 and 8-Lead MSOP 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

3 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

AD5300

GND

SYNC SCLK DIN

OUTPUT

BUFFER

8-BIT

DAC

REF (+) REF (–)

POWER-ON

RESET

DAC

REGISTER

INPUT

CONTROL

LOGIC

POWER-DOWN

CONTROL LOGIC

RESISTOR

NETWORK

GENERAL DESCRIPTION

The AD5300 is a single, 8-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 to be achieved. The AD5300 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.

The reference for the AD53001 is derived from the power supply

inputs and thus gives 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 that

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 to portable battery-operated equipment.

The power consumption is 0.7 mW at 5 V, reducing to 1 μW in

power-down mode.

The AD5300 is one of a family of pin-compatible DACs. The

AD5310 is the 10-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 MSOP packages.

PRODUCT HIGHLIGHTS

1.

Available in 6-lead SOT-23 and 8-lead MSOP 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 up to 30 MHz.

Designed for very low power consumption. The interface

powers up only 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.