AD5821 Analog Devices, AD5821 Datasheet
AD5821
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AD5821 Summary of contents
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... Linear actuator controls Light controls Current loop controls GENERAL DESCRIPTION The AD5821 is a single 10-bit digital-to-analog converter with 120 mA output current sink capability. It features an internal reference and operates from a single 2 5.5 V supply. The DAC is controlled via a 2-wire (I interface that operates at clock rates up to 400 kHz. ...
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... AD5821 TABLE OF CONTENTS Features .............................................................................................. 1 Consumer Applications ................................................................... 1 Industrial Applications .................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 AC Specifications.......................................................................... 4 Timing Specifications .................................................................. 4 Absolute Maximum Ratings............................................................ 5 Pin Configuration and Function Descriptions............................. 6 REVISION HISTORY 1/07—Revision 0: Initial Version Typical Performance Characteristics ..............................................7 Terminology .................................................................................... 10 Theory of Operation ...................................................................... 11 Serial Interface ............................................................................ 11 ...
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... Pulse width of spike suppressed I specification is valid for all DAC codes 1 GND 3.6 V INH INL 1 GND INH INL AD5821 = ...
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... AD5821 AC SPECIFICATIONS 5.5 V, AGND = DGND = 0 V, load resistance R DD Table 2. B Version Parameter Min Output Current Settling Time Slew Rate Major Code Change Glitch Impulse 3 Digital Feedthrough 1 Temperature range is as follows: B Version = −40°C to +85°C. 2 Guaranteed by design and characterization; not production tested. ...
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... Mounted on 4-Layer Board Lead Temperature, Soldering 2 Maximum Peak Reflow Temperature 1 To achieve the optimum θ recommended that the AD5821 JA be soldered on a 4-layer board per JEDEC J-STD-020C. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress Rating rating only ...
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... AD5821 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. 9-Ball WLCSP Pin Function Description Ball Number Mnemonic A1 I SINK XSHUTDOWN B1 AGND B2 DGND B3 SDA C1 DGND SCL 1690µ VIEW FROM BALL SIDE Figure 3. 9-Ball WLCSP Pin Configuration Description Output Current Sink ...
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... HORIZ = 468μA/DIV CH3 M50.0μs Figure 8. Settling Time for a 4-LSB Step (V DD VERT = 2μA/DIV 1 HORIZ = 2s/DIV CH1 M2.0s Figure 9. 0 Noise Plot (V DD 0.14 0. –40°C OUT 0.10 0.08 0.06 0.04 0.02 0 CODE Figure 10. Sink Current vs. Code vs. Temperature (V AD5821 = 3.6 V) 4.8μA p +25°C OUT I @ +85°C OUT = 3 ...
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... AD5821 2000 1800 1600 1400 1200 1000 800 600 400 200 0 10 100 1k FREQUENCY Figure 11. AC Power Supply Rejection (V 3.5 3.0 POSITIVE INL (V = 3.8V) POSITIVE INL (V DD 2.5 2.0 1.5 POSITIVE INL (V 1.0 0.5 NEGATIVE INL (V = 3.6V 3.8V) NEGATIVE INL ( –0.5 NEGATIVE INL (V DD –1.0 –40 –30 –20 –10 ...
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... TEMPERATURE (°C) Figure 18. XSHUTDOWN Logic High Level (V Supply Voltage and Temperature 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0 –50 ) vs. Figure 19. DNL vs. XSHUTDOWN Logic Low Level (V INL vs. INH Rev Page AD5821 2.7V DD –30 – TEMPERATURE (°C) ) vs. INL Supply Voltage and Temperature 90 ...
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... Zero-code error is a measurement of the output error when zero code (0x0000) is loaded to the DAC register. Ideally, the output is 0 mA. The zero-code error is always positive in the AD5821 because the output of the DAC cannot go below 0 mA. This is due to a combination of the offset errors in the DAC and output amplifier ...
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... SDA while SCL is high, to end the transaction. DATA FORMAT Data is written to the AD5821 high byte first, MSB first, and is shifted into the 16-bit input register. After all data is shifted in, data from the input register is transferred to the DAC register. ...
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... When accuracy is important in an application beneficial to consider power supply and ground return layout on the PCB. The PCB for the AD5821 should have separate analog and digital power supply sections. Where shared AGND and DGND is necessary, the connection of grounds should be made at only one point, as close as possible to the AD5821 ...
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... This decrease allows the user to either use voice coil motors with high resistance values or decrease the power supply voltage on the voice coil motor. The compliance voltage decreases as the I The power supply of the AD5821, or the regulator used to supply the AD5821, should be decoupled. Best practice power supply and T decoupling recommends that the power supply be decoupled with a 10 μ ...
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... The AD5821 is designed to sink up to 120 mA, which is more than adequate for available commercial linear motors or voice coils. Another factor that makes the AD5821 the ideal solution ...
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... TOP VIEW (BALL SIDE DOWN) ORDERING GUIDE Model Temperature Range 1 AD5821BCBZ-REEL7 −40°C to +85°C AD5821BCBZ-REEL 1 −40°C to +85°C AD5821-WAFER −40°C to +85°C AD5821D-WAFER −40°C to +85°C 1 EVAL-AD5821EBZ Pb-free part. 0.65 0.59 0.53 SEATING PLANE 0.36 0.32 1.750 0.28 1.690 1.630 0.50 BSC BALL PITCH ...
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... AD5821 NOTES 2 Purchase of licensed I C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I 2 Rights to use these components system, provided that the system conforms to the I ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners ...