WMS7201050M WINBOND [Winbond], WMS7201050M Datasheet
WMS7201050M
Related parts for WMS7201050M
WMS7201050M Summary of contents
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QUAD-CHANNEL NON-VOLATILE DIGITAL POTENTIOMETER WMS7204 Publication Release Date: January 2003 - 1 - PRELIMINARY Revision 1.0 ...
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GENERAL DESCRIPTION The WMS7204 is a 256-tap, quad-channel non-volatile digital potentiometer available in 10KΩ, 50KΩ and 100KΩ end-to-end resistances. These devices can be used as a three-terminal potentiometer two terminal variable resistor in a wide variety ...
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BLOCK DIAGRAM CLK Serial CS Interface SDI SDO NV Memory WP Control RDY R/B VDD Memory Power on/Preset Mem Tap bit Addressable Preset Tap bit NV Memory Power on/Preset ...
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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............................................................................................................ 8 7.1. Potentiometer and ...
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PIN CONFIGURATION CLK SDO 2 19 SDI VA1 VW1 VB1 R/B VB2 6 15 VA4 VW2 7 14 VW4 VA2 8 13 VB4 VA3 9 ...
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PIN DESCRIPTION PIN NAME PIN NO I/O 2 CLK SDI I 18 SDO O R VA1 - 16 VB1 - ...
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VB3 10 - VW3 11 O VA4 7 - VB4 9 - VW4 8 O connection on a mechanical potentiometer. B terminal of potentiometer ‘3’, equivalent to the LO terminal connection on a mechanical potentiometer. Wiper terminal of potentiometer ‘3’, ...
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FUNCTIONAL DESCRIPTION The WMS7204 series, a family of 256-tap, nonvolatile digitally programmable potentiometers is designed to operate as both a potentiometer or a variable resistor depending upon the output configuration selected. The chip can store four 9-bit words in ...
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OLATILE EMORY Each channel has four NVMEM positions available for storing the output buffer operating mode and the potentiometer setting. These NVMEM positions can be directly written through the SPI using a write command (#5) ...
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D C AISY HAIN Multiple devices can be controlled by the same bus without the need for extra CS lines from the microcontroller by daisy chaining the devices with the SDO of the first device connected to SDI of ...
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ERIAL ATA NTERFACE The WMS7204 contains a four-wire SPI interface: • SDO (Serial Data Output) Used for reading out the internal register contents and for daisy chaining multiple devices. • SDI (Serial Data Input) Used for ...
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TABLE 3 – A1 AND A0 ADDRESS BIT DECODE TABLE [A1 A0] Channel A3 and A2 are the address bits that decide which NVMEM memory to be accessed, as shown in the table below. TABLE 4 – A3 AND A2 ...
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Inst Instruction Byte No ...
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Sending a Command 1. Take the chip out of SLEEP mode. 2. Check that the write protect is set correctly if writing to NVMEM. 3. Check that R/B is HIGH before issuing command. 4. Pull the CS pin LOW ...
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The only way to change the output buffer mode is to write the desired value of bit D8 into an NVMEM location and then load the corresponding NVMEM location into the tap register. Publication Release Date: ...
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Inst. Command Command Byte No. Name: 3 Write Tap Register Down ...
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Reading Tap Registers and NVMEM Locations The contents of the tap register for any channel or any NVMEM location can be read back through the SDO pin. When a command is sent, the data is clocked out on the ...
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TIMING DIAGRAMS CLK t LEAD CS t DSU MSB SDI t LAC MSB SDO t RSU R/B t WPSU WP FIGURE 6 – WMS7204 TIMING DIAGRAM t t CYC WMS7204 ...
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PARAMETER SPI Clock Cycle Time SPI Clock HIGH Time SPI Clock LOW Time Lead Time Lag Time SDI Setup Time SDI Hold Time CS to SDO – SPI Line Acquire CS to SDO – SPI Line Release CLK to SDO ...
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ABSOLUTE MAXIMUM RATINGS TABLE 11 – ABSOLUTE MAXIMUM RATINGS Condition Junction temperature Storage temperature Voltage applied to any pad Note: Exposure to conditions beyond those listed under: Absolute Maximum Ratings, may adversely affect the ...
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ELECTRICAL CHARACTERISTICS TABLE 12 – ELECTRICAL CHARACTERISTICS All Parameters apply across specified operating ranges unless noted (V Typical values: V =5V and T=25°C DD PARAMETER Rheostat Mode Nominal Resistance Different Non Linearity Integral Non Linearity 1 Rheostat Tempco 2 ...
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Output Leakage Current 1 Input Capacitance 1 Output Capacitance Power Requirements 1 Operating Voltage Operating Current Operating Current Standby Current Power Supply Rejection Ratio Note: 1. Not subject to production test; 2. Only on Final Test noted. I ...
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T C EST IRCUITS 1LSB WMS7204 *Assume infinite input impedance Potentiometer divider nonlinearity error test circuit (INL, DNL) No Connection WMS7204 ...
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TYPICAL APPLICATION CIRCUIT Vin WMS7204 OUT − R (256 256 R = Total resistance of potentiometer Wiper setting for WMS7204 ...
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I = 32mA V REFH WMS7204 GND FIGURE 10 – WMS7204 TRIMMING VOLTAGE REFERENCE VDD 2 19 CLK SDO 3 18 SDI VA1 VW1 5 16 VSS VB1 6 15 R/B VB2 7 ...
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Vin CONTROL 1/4 WMS7204 1 CS\ 2 CLK 3 SDI 4 WP\ 5 FIGURE 12 – PROGRAMMABLE LOW-PASS FILTER 1/4 WMS7204 20 VDD 19 SDO 6 R/B\ VSS - 26 - WMS7204 ...
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L C AYOUT ONSIDERATIONS A 0.1µF bypass capacitor as close as possible to the V Often this can be done by placing the surface mount capacitor on the bottom side of the PC board, directly between the V and ...
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PACKAGE DRAWINGS AND DIMENSIONS Symbol α ...
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Control demensions are in milmeters . E θ FIGURE 15 – 20L SOIC – 150MIL Publication Release Date: January 2003 - 29 - WMS7204 Revision 1.0 ...
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FIGURE 16 – 20L TSSOP – 4.4MM - 30 - WMS7204 ...
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ORDERING INFORMATION Winbond’s WinPot Part Number Description: WMS72 XX XXX X * Single-Channel Devices Only. For the latest product information, access Winbond’s worldwide website at http://www.winbond-usa.com Winbond WinPot Products Features: • 01: Single channel with SPI Interface • 02: ...
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VERSION HISTORY VERSION DATE PAGE 1.0 Jan. 2003 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 of ...