DAC70508MRTET.B中文资料德州仪器数据手册PDF规格书

1 Features

1• Performance

– INL: ±1 LSB Maximum at 16-Bit Resolution

– TUE: ±0.1% of FSR Maximum

• Integrated 2.5 V Precision Internal Reference

– Initial Accuracy: ±5 mV Maximum

– Low Drift: 2 ppm/°C Typical, DAC80508

• High Drive Capability: 20 mA with 0.5 V from

Supply Rails

• Flexible Output Configuration

– User Selectable Gain: 2, 1 or ½

– Reset to Zero Scale or Midscale

– Clear Output Function: DACx0508C

• Wide Operating Range

– Power Supply: 2.7 V to 5.5 V

– Temperature Range: –40˚C to 125˚C

• 50 MHz SPI Compatible Serial Interface

– 1.7 V to 5.5 V Operation

– Daisy Chain Operation

– CRC Error Check

• Low Power: 0.6 mA/Channel at 5.5 V

• Small Packages:

– 3 mm × 3 mm, 16-Pin WQFN

– 2.4 mm x 2.4 mm, 16-Pin DSBGA

2 Applications

• Optical Networking

• Wireless Infrastructure

• Industrial Automation

• Data Acquisition Systems

3 Description

The DACx0508 is a pin-compatible family of low

power, eight-channel, buffered voltage-output, digitalto-

analog converters (DACs) with 16-, 14- and 12-bit

resolution. The DACx0508 includes a 2.5-V, 5-

ppm/°C internal reference, eliminating the need for an

external precision reference in most applications. A

user selectable gain configuration provides full-scale

output voltages of 1.25 V (gain = ½), 2.5 V (gain = 1)

or 5 V (gain = 2). The device operates from a single

2.7-V to 5.5-V supply, is specified monotonic and

provides high linearity of ±1 LSB INL.

Communication to the DACx0508 is performed

through a serial interface that operates at clock rates

up to 50 MHz. The VIO pin enables serial interface

operation from 1.7 V to 5.5 V. The DACx0508 flexible

interface enables operation with a wide range of

industry-standard microprocessors and

microcontrollers.

The DACx0508 incorporates a power-on-reset circuit

that powers up and maintains the DAC outputs at

either zero scale or midscale until a valid code is

written to the device. The device consumes low

current of 0.6 mA/channel at 5.5 V, making it suitable

for battery-operated equipment. A per-channel powerdown

feature reduces the device current consumption

to 15 μA.

The DACx0508 is characterized for operation over

the temperature range of –40°C to 125°C and is

available in small packages.