Details, datasheet, quote on part number: AD5246
PartAD5246
Category
Description128 Position I2C Compatible Programmable Resistor in SC70 Package
CompanyAnalog Devices
DatasheetDownload AD5246 datasheet
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Features, Applications
FEATURES

128-position End-to-end resistance 100 k Ultra-Compact 2.1 mm) package I2C compatible interface Full read/write of wiper register Power-on preset to midscale Single supply 5.5 V Low temperature coefficient 35 ppm/C Low power, IDD 5 A Wide operating temperature to +125C Evaluation board available

APPLICATIONS

Mechanical potentiometer replacement in new designs Transducer adjustment of pressure, temperature, position, chemical, and optical sensors RF amplifier biasing Automotive electronics adjustment Gain control and offset adjustment

The AD5246 provides a compact 2x2.1mm packaged solution for 128 position adjustment applications. This device performs the same electronic adjustment function as a variable resistor. Available in four different end-to-end resistance values 50k, 100k) these low temperature coefficient devices are ideal for high accuracy and stability variable resistance adjustments. The wiper settings are controllable through the I2C compatible digital interface, which can also be used to read back the present wiper register control word. The resistance between the wiper and either end point of the fixed resistor varies linearly with respect to the digital code transferred into the RDAC latch. Operating from to 5.5 volt power supply and consuming less than 5A allows for usage in portable battery operated applications.

Note: The terms digital potentiometer, VR, and RDAC are used interchangeably.

Purchase of licensed I2C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I2C Patent Rights to use these components an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips.

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 companies.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 2003 Analog Devices, Inc. All rights reserved.

Electrical Characteristics--5 k Version...................................... 3 Electrical 100 k Versions....... 4 Timing 100 k Versions 5 Absolute Maximum 6 I2C Interface....................................................................................... 7 Operation........................................................................................... 8 Programming the Variable Resistor........................................... 8 I2C Compatible 2-Wire Serial Bus.............................................. 8 Level Shifting for Bidirectional Interface.................................. 9 ESD Protection............................................................................. 9

Terminal Voltage Operating Range.............................................9 Power-Up Sequence................................................................... 10 Layout and Power Supply Bypassing....................................... 10 Pin Configuration and Function Descriptions........................... 11 Pin Configuration...................................................................... 11 Pin Function Descriptions........................................................ 11 Outline Dimensions....................................................................... 12 Ordering Guide.......................................................................... 12 ESD Caution................................................................................ 12

(VDD VA = +VDD; < +125C; unless otherwise noted.) Table 1.

Parameter DC CHARACTERISTICS--RHEOSTAT MODE Resolution Resistor Differential Nonlinearity2 Resistor Integral Nonlinearity2 Nominal Resistor Tolerance3 Resistance Temperature Coefficient Wiper Resistance RESISTOR TERMINALS Voltage Capacitance5 W Shutdown Supply Current6 Common-Mode Leakage DIGITAL INPUTS AND OUTPUTS Input Logic High Input Logic Low Input Logic High Input Logic Low Input Current Input Capacitance5 POWER SUPPLIES Power Supply Range Supply Current Power Dissipation7 Power Supply Sensitivity DYNAMIC CHARACTERISTICS5, 8 Bandwidth 3dB Total Harmonic Distortion Resistor Noise Voltage Density Symbol N R-DNL R-INL RAB RAB/T RW VB,W CB CW IDD_SD ICM VIH VIL VIH VIL IIL CIL VDD RANGE IDD PDISS PSS Conditions Min Typ1 Max VDD 3 V VDD 3 V VIN 5 V VIH V or VIL 0 V VIH V or VIL 0 V, VDD 5 V VDD 10%, Code = Midscale RAB 5 k, Code 1 V rms, = 1 kHz RWB k, RS

GND = 1 MHz, measured to GND, Code = 1 MHz, measured to GND, Code = 0x40 VDD = VDD/2

 

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