wms7121100s Winbond Electronics Corp America, wms7121100s Datasheet
wms7121100s
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wms7121100s Summary of contents
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WMS7120 / 7121 NON-VOLATILE DIGITAL POTENTIOMETERS WITH UP/DOWN (3-WIRE) INTERFACE, 10KOHM, 50KOHM, 100KOHM RESISTANCE WITHOUT / WITH OUTPUT BUFFER PRELIMINARY DATASHEET 64 TAPS Publication Release Date: July 2003 - 1 - Revision 1.0 ...
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GENERAL DESCRIPTION The WMS7120/7121 is a single channel 64-tap non-volatile linear digital potentiometer available in 10KΩ, 50KΩ and 100KΩ resistance. The device consists of Up/Down serial interface, tap register, decoder, resistor array, wiper switches, NV memory and control logics. ...
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BLOCK DIAGRAM INC Up/Down CS Serial U /D Interface NV Memory V SS Control FIGURE 1 – WMS7120 BLOCK DIAGRAM (Rheostat/Divider Mode) INC Up/Down CS Serial U/D Interface NV Memory V SS Control FIGURE 2 – WMS7121 BLOCK DIAGRAM ...
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TABLE OF CONTENTS 1. GENERAL DESCRIPTION.................................................................................................................. 2 2. FEATURES ......................................................................................................................................... 2 3. BLOCK DIAGRAM............................................................................................................................... 3 4. TABLE OF CONTENTS ...................................................................................................................... 4 5. PIN CONFIGURATION ....................................................................................................................... 5 6. PIN DESCRIPTION ............................................................................................................................. 6 7. FUNCTIONAL DESCRIPTION............................................................................................................ 7 7.1. Rheostat And Divider ...
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PIN CONFIGURATION 1 INC U 8-M SOP 1 INC 2 U 8-PDIP INC CS 7 U/D 2 ...
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PIN DESCRIPTION Pin Name Chip Select: When CS is LOW, the device is enabled. CS When CS is HIGH, the part is deselected and is in standby mode Up/Down Control: HIGH state enables the wiper to move towards the ...
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FUNCTIONAL DESCRIPTION 7. HEOSTAT ND IVIDER The WMS7120 device can operate as either a two-terminal variable resistor or a three-terminal voltage divider without an output buffer. However, the WMS7121 can only operate in a three-terminal voltage ...
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ERIAL ATA NTERFACE The WMS7120/7121 device has a 3-wire Up/Down Serial Interface consisting INC and U/ D control signals. The key features of this interface include: • Enabling the device • Determining the ...
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TIMING DIAGRAMS Conditions +2.7V to 5.5V [1] t PUD INC FIGURE 3 –WMS7120/1 TIMING DIAGRAM Note: [1] This only applies to the ...
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TABLE 10 – TIMING PARAMETERS PARAMETERS CS to INC Setup INC Setup INC Hold INC LOW Period INC HIGH Period INC Inactive to CS Inactive CS Deselect Time (NO STORE) CS Deselect Time (STORE) ...
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ABSOLUTE MAXIMUM RATINGS & OPERATING CONDITIONS TABLE 11 – ABSOLUTE MAXIMUM RATINGS (PACKAGED PARTS) Conditions Junction temperature Storage temperature Voltage applied to any pad Lead temperature (soldering – 10 seconds) V – TABLE 12 – OPERATING ...
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ELECTRICAL CHARACTERISTICS TABLE 12 – ELECTRICAL CHARACTERISTICS (Packaged parts) PARAMETERS SYMBOL Rheostat Mode Nominal Resistance [2] Different Non Linearity [2] Integral Non Linearity [1] Tempo [2] Wiper Resistance Wiper Current Divider Mode Resolution [2] Different Non Linearity [2] Integral ...
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TABLE 12 – ELECTRICAL CHARACTERISTICS (Packaged parts) – Cont’d PARAMETERS SYMBOL Input Leakage Current Output Leakage Current [1] Input Capacitance [1] Output Capacitance Power Requirements Operating Voltage Operating Current Standby Current Power Supply Rejection Ratio Notes: [1] Not subject to ...
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T C EST IRCUITS 1LSB= V+/ WMS71xx *Assume infinite input impedance Potentiometer divider nonlinearity error test circuit (INL, DNL) No Connection WMS71xx ...
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TYPICAL APPLICATION CIRCUITS Vin WMS71XX OUT (64- Total resistance of potentiometer Wiper setting for WMS71XX FIGURE ...
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WMS71xx Vout FIGURE 7 – WMS7121 TRIMMING VOLTAGE REFERENCE CS\ U/D\ INC\ FIGURE 8 – WMS7121 RF AMP CONTROL V+ V REFH 5V 0V GND C1 0.1uF CS U/ INC ...
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L C AYOUT ONSIDERATIONS Use a 0.1µF bypass capacitor as close as possible to the V performance. Often this can be done by placing the surface mount capacitor on the bottom side of the PC board, directly between the ...
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PACKAGE DRAWINGS AND DIMENSIONS 8 1 Control demensions are in milmeters . E θ FIGURE 10: 8L 150MIL SOIC - 18 - WMS7120 / 7121 ...
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FIGURE 12: 8L 3MM MSOP - 20 - WMS7120 / 7121 ...
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... End-to-end Resistance: 010: 10Kohm 050: 50Kohm 100: 100Kohm Package: S: SOIC P: PDIP M: MSOP SOIC PDIP WMS7120010S WMS7120010P WMS7120050S WMS7120050P WMS7120100S WMS7120100P WMS7121010S WMS7121010P WMS7121050S WMS7121050P WMS7121100S WMS7121100P - 21 - WMS7120 / 7121 MSOP WMS7120010M WMS7120050M WMS7120100M WMS7121010M WMS7121050M WMS7121100M Publication Release Date: July 2003 Revision 1.0 ...
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VERSION HISTORY VERSION DATE 1.0 July 2003 Initial issue The contents of this document are provided only as a guide for the applications of Winbond products. Winbond makes no representation or warranties with respect to the accuracy or completeness ...