Document
Data Sheet
FEATURES
Quad-channel high voltage DAC 12-bit resolution Pin selectable 30 V or 60 V output range Integrated precision reference Low power serial interface with readback capability Integrated temperature sensor alarm function Power-on reset Simultaneous updating via LDAC Wide operating temperature: −40°C to +105°C
High Voltage, Quad-Channel 12-Bit Voltage Output DAC AD5504
GENERAL DESCRIPTION
The AD5504 is a quad-channel, 12-bit, serial input, digital-toanalog converter with on-chip high voltage output amplifiers and an integrated precision reference. The DAC output voltage ranges are programmable via the range select pin (R_SEL). If R_SEL is held high, the DAC output ranges are 0 V to 30 V. If R_SEL is held low, the DAC output ranges are 0 V to 60 V. The on-chip output amplifiers allow an output swing within the range of AGND + 0.5 V to VDD − 0.5 V. The AD5504 has a high speed serial interface, which is compatible with SPI®-, QSPI™-, MICROWIRE™-, and DSP-interface standards and can handle clock speeds of up to 16.667 MHz.
APPLICATIONS
Programmable voltage sources High voltage LED drivers Receiver bias in optical communications
FUNCTIONAL BLOCK DIAGRAM
CLR R_SEL VLOGIC LDAC VDD 1713kΩ – VOUTA + 1713kΩ 122.36kΩ INPUT REGISTER B DAC REGISTER B DAC B 12 – VOUTB + 1713kΩ 122.36kΩ INPUT REGISTER C DAC REGISTER C DAC C 12 – VOUTC + 1713kΩ 122.36kΩ INPUT REGISTER D DAC REGISTER D DAC D 12 – VOUTD +
REFERENCE 122.36kΩ SDI SDO SCLK SYNC ALARM INPUT CONTROL LOGIC 12 INPUT REGISTER A DAC REGISTER A DACA 12
POWER-ON RESET
AD5504
POWER-DOWN CONTROL LOGIC TEMPERATURE SENSOR DGND AGND
Figure 1.
Rev. B
Document Feedback One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2009-2012 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.
07994-001
Free Datasheet http://www.datasheet4u.com/
AD5504 TABLE OF CONTENTS
Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 4 AC Characteristics ........................................................................ 5 Timing Characteristics ................................................................ 6 Absolute Maximum Ratings ............................................................ 8 Thermal Resistance ...................................................................... 8 ESD Caution .................................................................................. 8 Pin Configuration and Function Descriptions ............................. 9 Typical Performance Characteristics ........................................... 10 Terminology .................................................................................... 12 Theory of Operation ...................................................................... 14 Power-Up State ........................................................................... 14
Data Sheet
Power-Down Mode .................................................................... 14 DAC Channel Architecture....................................................... 14 Selecting the Output Range ...................................................... 14 CLR Function.............................................................................. 14 LDAC Function .......................................................................... 14 Temperature Sensor ................................................................... 15 Power Dissipation....................................................................... 15 Power Supply Sequencing ......................................................... 15 Serial Interface ................................................................................ 16 Write Mode ................................................................................. 16 Read Mode .................................................................................. 16 Writing to the Control Register ................................................ 16 Interfaci.