4-/6-Channel Digital Potentiometers Data Sheet AD5204/AD5206 FEATURES FUNCTIONAL BLOCK DIAGRAMS 256 positions AD5204 V CS DD Multiple independently programmable channels A1 CLK D7 AD52044-channel EN W1 RDAC AD52066-channel B1 ADDR LATCH A2 DEC 1 Potentiometer replacement A1 SDO DO A0 D0 R Terminal resistance of 10 k, 50 k, 100 k D7 3-wire SPI-compatible serial data input +2.7 V to +5.5 V single-supply operation 2.7 V dual-supply SER REG operation A4 D7 Power-on midscale preset W4 RDAC SDI DI D0 B4 LATCH APPLICATIONS 4 SHDN 8 D0 Mechanical potentiometer replacement R V SS POWER-ON Instrumentation: gain, offset adjustment PRESET PR GND Programmable voltage-to-current conversion Programmable filters, delays, time constants Figure 1. Line impedance matching AD5206 V CS DD GENERAL DESCRIPTION A1 CLK D7 The AD5204/AD5206 provide 4-/6-channel, 256-position EN W1 RDAC digitally controlled variable resistor (VR) devices. These B1 ADDR LATCH A2 DEC 1 devices perform the same electronic adjustment function as a A1 A0 R D0 potentiometer or variable resistor. Each channel of the D7 AD5204/ AD5206 contains a fixed resistor with a wiper contact that taps the fixed resistor value at a point determined by a SER REG digital code loaded into the SPI-compatible serial-input A6 D7 register. The resistance between the wiper and either endpoint W6 RDAC SDI DI D0 B6 of the fixed resistor varies linearly with respect to the digital code LATCH 6 transferred into the VR latch. The variable resistor offers a 8 D0 R completely programmable value of resistance between the POWER-ON PRESET GND V A terminal and the wiper or the B terminal and the wiper. The SS fixed A-to-B terminal resistance of 10 k, 50 k, or 100 k has Figure 2. a nominal temperature coefficient of 700 ppm/C. PR An optional reset ( ) pin forces all the AD5204 wipers to the Each VR has its own VR latch that holds its programmed midscale position by loading 0x80 into the VR latch. resistance value. These VR latches are updated from an internal The AD5204/AD5206 are available in the 24-lead surface- serial-to-parallel shift register that is loaded from a standard mount SOIC, TSSOP, and PDIP packages. The AD5204 is also 3-wire serial-input digital interface. Eleven data bits make up available in a 32-lead, 5 mm 5 mm LFCSP package. All parts are the data-word clocked into the serial input register. The first guaranteed to operate over the extended industrial temperature three bits are decoded to determine which VR latch is loaded range of 40C to +85C. For additional single-, dual-, and quad- CS with the last eight bits of the data-word when the strobe is channel devices, see the AD8400/AD8402/AD8403 data sheets. returned to logic high. A serial data output pin at the opposite end of the serial register (AD5204 only) allows simple daisy chaining in multiple VR applications without requiring additional external decoding logic. Rev. E Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. Tel: 781.329.4700 19992020 Analog Devices, Inc. All rights reserved. No license is granted by implication or otherwise under any patent or patent rights of Analog Technical Support www.analog.com Devices. Trademarks and registered trademarks are the property of their respective owners. 06884-002 06884-001AD5204/AD5206 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics .......................................... 10 Applications ...................................................................................... 1 Operation ........................................................................................ 12 General Description ......................................................................... 1 Programming the Variable Resistor ............................................ 13 Functional Block Diagrams ............................................................. 1 Rheostat Operation .................................................................... 13 Revision History ............................................................................... 2 Programming the Potentiometer Divider .................................. 14 Specifications .................................................................................... 3 Voltage Output Operation ........................................................ 14 Electrical Characteristics ............................................................. 3 Digital Interfacing .......................................................................... 15 Timing Diagrams .............................................................................. 5 Test Circuits .................................................................................... 16 Absolute Maximum Ratings ........................................................... 6 Outline Dimensions ....................................................................... 17 ESD Caution.................................................................................. 6 Ordering Guide .......................................................................... 18 Pin Configurations and Function Descriptions ........................... 7 REVISION HISTORY 9/2020Rev. D to Rev. E 5/2009Rev. A to Rev. B Changed CP-32-3 to CP-32-13 .................................... Throughout Changes to Table 1 ............................................................................ 3 Changes to Figure 7 .......................................................................... 8 Changes to Absolute Maximum Ratings ....................................... 6 Updated Outline Dimensions ....................................................... 18 Changes to Figure 7 .......................................................................... 8 Changes to Ordering Guide .......................................................... 18 Changes to Table 4 ............................................................................ 8 6/2015Rev. C to Rev. D 11/2007Rev. 0 to Rev. A Updated Outline Dimensions ....................................................... 18 Updated Format ................................................................. Universal Changes to Ordering Guide .......................................................... 19 Added 32-Lead LFCSP Package ....................................... Universal Changed RBA to RAB ............................................................ Universal 7/2010Rev. B to Rev. C Changes to Absolute Maximum Ratings ....................................... 6 Changes to Digital Input and Output Voltage to GND Changes to Operation Section ...................................................... 12 Parameter, Table 2 ............................................................................ 6 Updated Outline Dimensions ...................................................... 17 Changes to Ordering Guide .......................................................... 18 Changes to Ordering Guide .......................................................... 18 9/1999Revision 0: Initial Version Rev. E Page 2 of 20