DAC7728 Octal, Low Power, 12-Bit, +/-16.5 V Output Parallel Input Digital-To-Analog Converter | TI.com

DAC7728 (ACTIVE)

Octal, Low Power, 12-Bit, +/-16.5 V Output Parallel Input Digital-To-Analog Converter

 

Description

The DAC7728 is a low-power, octal, 12-bit digital-to-analog converter (DAC). With a 5V reference, the output can either be a bipolar ±15V voltage when operating from a dual ±15.5V (or higher) power supply, or a unipolar 0V to +30V voltage when operating from a +30.5V power supply. With a 5.5V reference, the output can either be ±16.5V for a dual ±17V (or higher) power supply, or a unipolar 0V to +33V voltage when operating from a +33.5V (or higher) power supply. This DAC provides low-power operation, good linearity, and low glitch over the specified temperature range of –40°C to +105°C. This device is trimmed in manufacturing and has very low zero and full-scale error. In addition, user calibration can be performed over the entire signal chain. The output range can be offset by using the DAC Offset Register.

The DAC7728 features a standard, high-speed, 12-bit parallel interface that operates at up to 50MHz and is 1.8V, 3V, and 5V logic compatible, to communicate with a DSP or microprocessor. The eight DACs and the auxiliary registers are addressed with five address lines. The device features double-buffered interface logic. An asynchronous load input (LDAC) transfers data from the DAC data register to the DAC latch. The asynchronous CLR input sets the output of all eight DACs to AGND. The VMON pin is a monitor output that connects to the individual analog outputs, the offset DAC, and the reference buffer outputs through a multiplexer (mux).

The DAC7728 is pin-to-pin compatible with the DAC8728 (16-bit) and the DAC8228 (14-bit).

Features

  • Bipolar Output: ±3V, up to ±16.5V
  • Unipolar Output: 0V to +33V
  • 12-Bit Resolution
  • Low Power: 13.5mW/Ch
  • Relative Accuracy: 1LSB Max
  • Flexible User Calibration
  • Low Zero/Gain Error: ±1 LSB Max
  • Low Glitch: 4nV-s
  • Settling Time: 15µs
  • Channel Monitor Output
  • Programmable Gain: x4, x6
  • Programmable Offset
  • 12-Bit Parallel Interface: 50MHz (Write Operation)
  • Packages: QFN-56 (8mm x 8mm), TQFP-64 (10mm x 10mm)
  • APPLICATIONS
    • Automatic Test Equipment
    • PLC and Industrial Process Control
    • Communications

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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
DAC7728 DAC7718 DAC7734 DAC81408 DAC8218 DAC8228 DAC8718 DAC8728 DAC8734
12     12     16     16     14     14     16     16     16    
String     String     R-2R     R-2R     String     String     String     String     R-2R    
8     8     4     8     8     8     8     8     4    
Parallel     SPI     SPI     SPI     SPI     Parallel     SPI     Parallel     SPI    
33     33     10     20     33     33     33     33     16.5    
-16.5     -16.5     -10     -20     -16.5     -16.5     -16.5     -16.5     -16.5    
15     15     10     20     15     15     15     15     6    
Buffered Voltage     Buffered Voltage     Buffered Voltage     Buffered Voltage     Buffered Voltage     Buffered Voltage     Buffered Voltage     Buffered Voltage     Buffered Voltage    
Ext     Ext     Ext     Int     Ext     Ext     Ext     Ext     Ext    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 105     -40 to 85     -40 to 85     -40 to 125     -40 to 105     -40 to 105     -40 to 105     -40 to 105     -40 to 105    
On-chip Offset and Gain Calibration
Reset to Mid-Scale    
On-chip Offset and Gain Calibration
SDO    
Reset to Mid-Scale
SDO    
Integrated Temp Sensor     On-chip Offset and Gain Calibration
Reset to Mid-Scale
SDO    
On-chip Offset and Gain Calibration     SDO     On-chip Offset and Gain Calibration     On-chip Offset and Gain Calibration
SDO