DAC8771 Single-Channel 16-Bit Voltage- and Current-Output DAC With Adaptive Power Management | TI.com

DAC8771 (ACTIVE)

Single-Channel 16-Bit Voltage- and Current-Output DAC With Adaptive Power Management

 

Description

The DAC8771 is a single 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 V and 32 V based on continuous feedback of voltage on the current output pin via a buck/boost converter. When programmed as a voltage output, this circuit generates a programmable supply voltage for the voltage output stage (±15 V). DAC8771 contains an LDO to generate the digital supply (5 V) from a single power supply pin, particularly helpful in isolated applications.

DAC8771 is also implemented with a 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 devices can operate with a single external power supply of +12 V to +36 V using the integrated buck/boost converter or with external power supplies when the buck/boost converter is disabled.

Features

  • Output Current:
    • 0 mA - 24 mA; 3.5 mA - 23.5 mA;
      0 mA - 20 mA; 4 mA - 20 mA; ±24 mA
  • Output Voltage (with/without 20% over-range):
    • 0 V - 5 V; 0 V - 10 V; ±5 V; ±10 V
    • 0 V - 6 V; 0 V - 12 V; ±6 V; ±12 V
  • Adaptive Power Management
  • Single Wide Power Supply Pin
    • 12 V - 36 V with Buck-Boost
    • 12 V - 33 V without Buck-Boost
  • ±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
  • Safe actions on alarm condition
  • Auto Learn Feature
  • Wide Temperature Range: –40°C to +125°C

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Parametrics Compare all products in Precision DACs (<=10MSPS)

 
Resolution (Bits)
Architecture
DAC Channels
Interface
Output Range (Max) (mA/V)
Output Range (Min) (mA/V)
Settling Time (µs)
Output Type
Reference: Type
Rating
Operating Temperature Range (C)
Features
DAC8771 DAC8760 DAC8775
16     16     16    
String     String     String    
1     1     4    
SPI     SPI     SPI    
24     24     24    
-24     0     -24    
10     10     10    
Buffered Current
Buffered Voltage    
Buffered Current
Buffered Voltage    
Buffered Current
Buffered Voltage    
Ext
Int    
Ext
Int    
Ext
Int    
Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125    
Integrated Buck Boost Converter
Low Power    
Current Output
Low Power    
Integrated Buck Boost Converter
Low Power