FEATURES

· Micropower Operation: 950 μA at 5 V VDD

· Power-On Reset to Zero

· +2.7-V to +5.5-V Analog Power Supply

· 16-Bit Monotonic

· Settling Time: 10μs to ±0.003% FSR

· I2C™ Interface Up to 3.4 Mbps

· Data Transmit Capability

· On-Chip Output Buffer Amplifier, Rail-to-Rail

Operation

· Double-Buffered Input Register

· Address Support for up to Sixteen DAC8574s

· Synchronous Update Support for up to 64

Channels

· Operation From –40°C to 105°C

· Small 16-Lead TSSOP Package

APPLICATIONS

· Process Control

· Data Acquisition Systems

· Closed-Loop Servo Control

· PC Peripherals

· Portable Instrumentation

DESCRIPTION

The DAC8574 is a low-power, quad channel, 16-bit

buffered voltage output DAC. Its on-chip precision

output amplifier allows rail-to-rail output swing to be

achieved. The DAC8574 utilizes an I2C compatible

two wire serial interface supporting high-speed

interface mode with address support of up to sixteen

DAC8574s for a total of 64 channels on the bus.

The DAC8574 requires an external reference voltage

to set the output range of the DAC. The DAC8574

incorporates a power-on-reset circuit that ensures

that the DAC output powers up at zero volts and

remains there until a valid write takes place to the

device. The DAC8574 contains a power-down fea- ture, accessed via the internal control register, that

reduces the current consumption of the device to 200

nA at 5 V.

The low power consumption of this part in normal

operation makes it ideally suited to portable battery

operated equipment. The power consumption is less

than 5 mW at VDD = 5 V reducing to 1 μW in

power-down mode.

The DAC8574 is available in a 16-lead TSSOP

package.