DAC8775IRWFRG4中文资料德州仪器数据手册PDF规格书

1 Features

1• Output Current:

– 0 mA to 24 mA; 3.5 mA to 23.5 mA; 0 mA to

20 mA; 4 mA to 20 mA; ±24 mA

• Output Voltage (with/without 20% over-range):

– 0 V to 5 V; 0 V to 10 V; ±5 V; ±10 V

– 0 V to 6 V; 0 V to 12 V; ±6 V; ±12 V

• Adaptive Power Management

• Single Wide Power Supply Pin (12 V – 36 V )

• ±0.1% FSR Total Unadjusted Error (TUE)

• DNL: ±1 LSB Max

• Internal 5-V Reference (10 ppm/°C max)

• Internal 5-V Digital Power Supply Output

• CRC/Frame Error Check, Watchdog Timer

• Thermal Alarm, Open/Short Circuit for System

Reliability

• Safe Actions on Alarm Condition

• Auto Learn Load Detection

• Wide Temperature Range: –40°C to +125°C

2 Applications

• 4-mA to 20-mA Current Loops

• Analog Output Modules

• Programmable Logic Controllers (PLCs)

• Building Automation

• Sensor Transmitters

• Process Control

3 Description

The DAC8775 is a quad-channel precision, fully

integrated, 16-bit, digital-to-analog converter (DAC)

with adaptive power management, and is designed to

meet the requirements of industrial control

applications. The adaptive power management

circuit, when enabled, minimizes the power

dissipation of the chip. When programmed as a

current output, the supply voltage on the current

output driver is regulated between 4.5 V and 32 V

based on continuous feedback of voltage on the

current output pin via an integrated buck/boost

converter. When programmed as a voltage output,

this circuit generates a programmable supply voltage

for the voltage output stage (±15 V). DAC8775 also

contains an LDO to generate the digital supply (5 V)

from a single power supply pin.

DAC8775 is also implemented with a Highway

Addressable Remote Transducer (HART) Signal

Interface to superimpose an external HART signal on

the current output. The slew rate of the current output

DAC is register programmable. The device can

operate with a single external power supply of +12 V

to +36 V using the integrated buck/boost converters

or with external power supplies when the buck/boost

converters are disabled.