DAC8228 Octal, Low Power, 14-Bit, +/-16.5V Output Parallel Input Digital-To-Analog Converter | TI.com

DAC8228
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Octal, Low Power, 14-Bit, +/-16.5V Output Parallel Input Digital-To-Analog Converter

 

Description

The DAC8228 is a low-power, octal, 14-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 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 to achieve ±1 LSB bipolar zero/full-scale error for a bipolar supply, or ±1 LSB zero-code/full-scale error for a unipolar supply over the entire signal chain. The output range can be offset by using the DAC Offset Register.

The DAC8228 features a standard, high-speed, 14-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 DAC8228 is pin-to-pin compatible with the DAC8728 (16-bit) and the DAC7728 (12-bit).

Features

  • Bipolar Output: ±3V, up to ±16.5V
  • Unipolar Output: 0V to +33V
  • 14-Bit Resolution
  • Low Power: 13.5mW/Ch
  • Relative Accuracy: 1LSB Max
  • Flexible User Calibration
  • Low Zero/Full-Scale Error
    • Before User Calibration: ±2.5 LSB Max
    • After User Calibration: ±1 LSB
  • Low Glitch: 4nV-s
  • Settling Time: 15µs
  • Channel Monitor Output
  • Programmable Gain: x4, x6
  • Programmable Offset
  • 14-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

Parametrics

Compare all products in Precision DACs (<=10MSPS) Email Download to Excel
Part number Order 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
DAC8228 Order now 14     String     8     Parallel     33     -16.5     15     Buffered Voltage     Ext     Catalog     -40 to 105     On-chip Offset and Gain Calibration    
DAC7718 Order now 12     String     8     SPI     33     -16.5     15     Buffered Voltage     Ext     Catalog     -40 to 85     On-chip Offset and Gain Calibration
SDO    
DAC7728 Order now 12     String     8     Parallel     33     -16.5     15     Buffered Voltage     Ext     Catalog     -40 to 105     On-chip Offset and Gain Calibration
Reset to Mid-Scale    
DAC7734 Order now 16     R-2R     4     SPI     10     -10     10     Buffered Voltage     Ext     Catalog     -40 to 85     Reset to Mid-Scale
SDO    
DAC81408 Order now 16     R-2R     8     SPI     20     -20     20     Buffered Voltage     Int     Catalog     -40 to 125     Integrated Temp Sensor    
DAC8218 Order now 14     String     8     SPI     33     -16.5     15     Buffered Voltage     Ext     Catalog     -40 to 105     On-chip Offset and Gain Calibration
Reset to Mid-Scale
SDO