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Part: AD5273BRJ50-R2
Category:
Description: 64-Position, One-time-programmable (OTP) Digital Potentiometer
Company: Analog Devices
Datasheet: Download AD5273BRJ50-R2 datasheet File size : 845 kB
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64-Position OTP Digital Potentiometer AD5273
FEATURES 64 Positions OTP (One-Time-Programmable)1 Set-and-Forget Resistance Setting 1 k , 10 k , 50 k , 100 k End-to-End Terminal Resistance Compact Standard SOT23-8 Package Ultralow Power: IDD = 5 A Max Fast Settling Time: tS = 5 s Typ in Power-Up I2C Compatible Digital Interface Computer Software2 Replaces C in Factory Programming Applications Wide Temperature Range: 40 C to +105 C 5 V Programming Voltage Low Operating Voltage, 2.7 V to 5.5 V OTP Validation Check Function APPLICATIONS Systems Calibrations Electronics Level Settings Mechanical Trimmers® Replacement in New Designs Automotive Electronics Adjustments Transducer Circuits Adjustments Programmable Filters up to 6 MHz BW3 FUNCTIONAL BLOCK DIAGRAM
SCL SDA I2C INTERFACE AND CONTROL LOGIC A
W
A0
AD5273
WIPER REGISTER FUSE LINK
B
VDD GND
In addition, for applications that program AD5273 at the factory, Analog Devices offers device programming software2 running in Windows® NT, 2000, and XP operating systems. This software application effectively replaces any external I2C controllers, which in turn enhances users' systems time-to-market. AD5273 is available in 1 k , 10 k , 50 k , and 100 k in compact SOT23 8-lead standard package and operates from 40°C to +105°C. Besides its unique OTP feature, the AD5273 lends itself well to general digital potentiometer applications due to its effective resolution, array resistance options, small footprint, and low cost. An AD5273 evaluation kit and software are available. The kit includes the connector and cable that can be converted for further factory programming applications. For applications that require dynamic adjustment of resistance settings with nonvolatile EEMEM, users should refer to AD523x and AD525x families of nonvolatile memory digital potentiometers.
GENERAL DESCRIPTION
The AD5273 is a 64-position, One-Time-Programmable (OTP) digital potentiometer4 that employs fuse link technology to achieve the permanent program setting. This device performs the same electronic adjustment function as most mechanical trimmers and variable resistors. It allows unlimited adjustments before permanently setting the resistance values. The AD5273 is programmed using a 2-wire, I2C compatible digital control. During the write mode, a fuse blow command is executed after the final value is determined, therefore freezing the wiper position at a given setting (analogous to placing epoxy on a mechanical trimmer). When this permanent setting is achieved, the value will not change regardless of the supply variations or environmental stresses under normal operating conditions. To verify the success of permanent programming, Analog Devices patterned the OTP validation such that the fuse status can be discerned from two validation bits in the read mode.
NOTES 1 One-Time-Programmable--Unlimited adjustments before permanent setting. 2 ADI cannot guarantee the software to be 100% compatible in all systems due to the wide variations in computer configurations. 3 Applies to 1 k parts only. 4 The terms digital potentiometer, VR, and RDAC are used interchangeably.
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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. 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 companies.
One Technology Way, P O. Box 9106, Norwood, MA 02062-9106, U.S.A. . Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2002. All rights reserved.
AD5273SPECIFICATIONS
ELECTRICAL CHARACTERISTICS 1 k , 10 k , 50 k , 100 k
(VDD = 2.7 V to 5.5 V, VA < VDD, VB = 0 V, 40°C < TA < +105°C, unless otherwise noted.)
Parameter DC CHARACTERISTICS RHEOSTAT MODE Resolution Resistor Differential NL2 (10 k , 50 k , 100 k ) (1 k ) Resistor Nonlinearity2 (10 k , 50 k , 100 k ) (1 k ) Nominal Resistance Tolerance3 (10 k , 50 k , 100 k ) Nominal Resistance (1 k ) Resistance Temperature Coefficient D Wiper Resistance C CHARACTERISTICS POTENTIOMETER DIVIDER MODE Differential Nonlinearity4 Integral Nonlinearity4 Voltage Divider Temperature Coefficient Full-Scale Error Zero-Scale Error (10 k , 50 k , 100 k ) (1 k ) RESISTOR TERMINALS Voltage Range5 Capacitance6 A, B Capacitance6 W Common Mode Leakage DIGITAL INPUTS AND OUTPUTS Input Logic High Input Logic Low Input Logic High Input Logic Low Output Logic High (SDO) Output Logic Low (SDO) Input Logic Current Input Capacitance6 POWER SUPPLIES Power Supply Range OTP Power Supply7 Supply Current OTP Supply Current8 Power Dissipation9 Power Supply Sensitivity Symbol Conditions Min Typ1 Max Unit
VERSIONS
N R-DNL RWB, VA = NC RWB, VA = NC R-INL RAB RAB RAB/ T RW RWB, VA = NC RWB, VA = NC TA = 25°C VAB = VDD, Wiper = No Connect IW = VDD/R, VDD = 3 V or 5 V 0.5 5 30 0.8 +0.10 +2 0.5 1 +0.05 +0.25
6 +0.5 +1 +0.5 +5 +30 1.6 100
Bits LSB LSB LSB LSB LSB % k ppm/°C
1.2 300 60
DNL INL VW/ T VWFSE VWZSE Code = 20H Code = 3FH Code = 00H Code = 00H VA,B,W CA,B CW ICM VIH VIL VIH VIL VIH VIL IIL CIL VDD VDD_OTP IDD IDD_OTP PDISS PSSR
0.5 0.5
+0.1
+0.5 +0.5
LSB LSB ppm/°C LSB LSB LSB LSB V pF pF nA V V V V V V µA pF V V µA mA mW %/%
10 1 6 0 0 0 0 0 1 5 VDD 25 55 1 2.4 0.8
f = 5 MHz, Measured to GND, Code = 20H f = 1 MHz, Measured to GND, Code = 20H VA = VB = VW
VLOGIC = 3 V VLOGIC = 3 V VIN = 0 V or 5 V
2.1 0.6 4.9 0.01 5 2.7 5 0.1 100 0.2 0.015 0.3 +0.015 0.4 1
TA = 25°C VIH = 5 V or VIL = 0 V TA = 25°C VIH = 5 V or VIL = 0 V, VDD = 5 V
5.5 6 5
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AD5273
Parameter DYNAMIC CHARACTERISTICS Bandw idt h 3 dB
6, 10, 11
Symbol BW_1 k BW_10 k BW_50 k BW_100 k T H DW tS1 tS _OT P tS2 eN_WB
Conditions R A B = 1 k, Code = 20H R A B = 10 k, Code = 20H R A B = 50 k, Code = 20H R A B = 100 k, Code = 20H VA = 1 V rms, R A B = 1 k, V B = 0 V, f = 1 kHz VA = 5 V ± 1 LSB Error Band, V B = 0, Measured at V W VA = 5 V ± 1 LSB Error Band, V B = 0, Measured at V W VA = 5 V ± 1 LSB Error Band, VB = 0, Measured at VW RAB = 1 k, f = 1 kHz, Code = 20H RAB = 20 k, f = 1 kHz, Code = 20H k RAB = 50 k, f = 1 kHz, Code = 20H k RAB = 100 k, f = 1 kHz, Code = 20H k
Min
Typ 6000 600 110 60 0.014 5 400 5 3 13 20 28
Max
Unit kHz kHz kHz kHz % µs ms µs nV/Hz Hz nV/Hz Hz nV/Hz Hz nV/Hz Hz
Total Harmonic Distortion Adjust ment Settling Time OT P Settling Time12 Power - Up Settling Time Post Fuses Blown Resistor Noise Voltage
INTERFACE TIMING CHARACTERISTICS (applies to all parts6, 11, 13) SCL Clock Frequency fSCL SCL tBUF Bus Free Time between STOP and START t1 tHD;STA Hold Time (repeated START) t2 After this period, the first clock pulse is generated. tLOW Low Period of SCL Clock t3 tHIGH High Period of SCL Clock t4 tSU;STA Setup Time for START Condition t5 tHD;DAT Data Hold Time t6 tSU;DAT Data Setup Time t7 tF Fall Time of Both SDA and SCL Signals t8 tR Rise Time of Both SDA and SCL Signals t9 tSU;STO Setup Time for STOP Condition t10
400 1.3 0.6 1.3 0.6 0.6 0.1
kHz µs µs µs µs µs µs µs µs µs µs
50 0.9 0.3 0.3
0.6
NOTES 1 Typicals represent average readings at 25°C, VDD = 5 V, VSS = 0 V. 2 Resistor position nonlinearity error R-INL is the deviation from an ideal value measured between the maximum resistance and the minimum resistance wiper positions. R-DNL measures the relative step change from ideal between successive tap positions. Parts are guaranteed monotonic. 3 VAB = VDD, Wiper (VW) = No Connect. 4 INL and DNL are measured at VW with the RDAC configured as a potentiometer divider similar to a voltage output D/A converter. VA = VDD and VB = 0 V. DNL specification limits of ±1 LSB maximum are guaranteed monotonic operating conditions. 5 Resistor terminals A, B, W have no limitations on polarity with respect to each other. 6 Guaranteed by design and not subject to production test. 7 Different from operating power supply, power supply for OTP is used one time only. 8 Different from operating current, supply current for OTP lasts approximately 400 ms for one time needed only. 9 PDISS is calculated from (IDD VDD). CMOS logic level inputs result in minimum power dissipation. 10 Bandwidth, noise, and settling time are dependent on the terminal resistance value chosen. The lowest R value results in the fastest settling time and highest bandwidth. The highest R value results in the minimum overall power consumption. 11 All dynamic characteristics use VDD = 5 V. 12 Different from settling time after fuses are blown. The OTP settling time occurs once only. 13 See Figure 1 for location of measured values. Specifications subject to change without notice.
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AD5273
ABSOLUTE MAXIMUM RATINGS1
(TA = 25°C, unless otherwise noted.)
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V, +6.5 V VA, VB, VW to GND . . . . . . . . . . . . . . . . . . . . . . . . . . GND, VDD AB, AW, BW Intermittent2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±2 mA Digital Input and Output Voltage to GND . . . . . . . . . . 0 V, VDD Operating Temperature Range . . . . . . . . . . . . 40°C to +105°C Maximum Junction Temperature (TJ MAX) . . . . . . . . . . . .150°C Storage Temperature . . . . . . . . . . . . . . . . . . . . 65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . . . .300°C Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . .215°C Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220°C Thermal Resistance3 JA, SOT-23 . . . . . . . . . . . . . . . . 230°C/W
NOTES 1 Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 2 Maximum terminal current is bounded by the maximum current handling of the switches, maximum power dissipation of the package, and maximum applied voltage across any two of the A, B, and W terminals at a given resistance. 3 Package Power Dissipation = (TJ MAX TA)/ JA
ORDERING GUIDE
Model AD5273BRJ1-REEL7 AD5273BRJ10-REEL7 AD5273BRJ50-REEL7 AD5273BRJ100-REEL7 AD5273BRJ1-R2 AD5273BRJ10-R2 AD5273BRJ50-R2 AD5273BRJ100-R2 AD5273EVAL
Resistance RAB (k ) 1 10 50 100 1 10 50 100 *
Package Code RJ RJ RJ RJ RJ RJ RJ RJ NA
Package Description SOT23-8 SOT23-8 SOT23-8 SOT23-8 SOT23-8 SOT23-8 SOT23-8 SOT23-8 NA
Full Container Quantities 3000 3000 3000 3000 250 250 250 250 *
Brand DYA DYB DYC DYD DYA DYB DYC DYD NA
*Users should order samples additionally as the evaluation kit comes with a socket but does not include the parts.
CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD5273 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
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AD5273
W1 VDD 2
8A 7B TOP VIEW GND 3 (Not to Scale) 6 A0
AD5273
SCL 4
5 SDA
PIN FUNCTION DESCRIPTIONS
Pin No. 1 2 3 4 5 6 7 8
Mnemonic W VDD GND SCL SDA A0 B A
Description Wiper Terminal W Positive Power Supply. Specified for non-OTP operation from 2.7 V to 5.5 V. For OTP programming, VDD needs to be a minimum of 5 V. Common Ground Serial Clock Input. Requires Pull-Up Resistor. Serial Data Input/Output. Requires Pull-Up Resistor. I2C Device Address Bit Resistor Terminal B Resistor Terminal A
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