FEATURES

· Micropower Operation: 500 μA at 3 V VDD

· Fast Update Rate: 188 kSPS

· Per-channel Power-down Capability

· Power-On Reset to Zero

· 2.7-V to 5.5-V Analog Power Supply

· 8-bit Monotonic

· 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 Four DAC5574s

· Synchronous Update Support for up to 16

Channels

· Operation From –40°C to 105°C

· Small 10 Lead MSOP Package

APPLICATIONS

· Process Control

· Data Acquisition Systems

· Closed-Loop Servo Control

· PC Peripherals

· Portable Instrumentation

DESCRIPTION

The DAC5574 is a low-power, quad channel, 8-bit

buffered voltage output DAC. Its on-chip precision

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

achieved. The DAC5574 utilizes an I2C compatible two wire serial interface supporting high-speed

interface mode with address support of up to four

DAC5574s for a total of 16 channels on the bus.

The DAC5574 uses VDD and GND to set the output

range of the DAC. The DAC5574 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 DAC5574

contains a per-channel power-down feature, ac-

cessed via the internal control register, reducing 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 3mW at VDD = 5 V reducing to 1 μW in

power-down mode.

TI offers a variety of data converters with I2C

interface. See DACx57x family of 16/12/10/8 bit,

single and quad channel DACs. Also see ADS7823

and ADS1100, 12-bit octal channel and 16-bit single

channel ADCs.