WMS7201010S WINBOND [Winbond], WMS7201010S Datasheet
WMS7201010S
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WMS7201010S Summary of contents
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NON-VOLATILE DIGITAL POTENTIOMETER WMS7201 Publication Release Date: January 2003 - 1 - PRELIMINARY Revision 1.1 ...
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GENERAL DESCRIPTION The WMS7201 is a 256-tap, single-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 Memory WP Control V DD FIGURE 1 – WMS7201 BLOCK DIAGRAM Note 1: Available in 10-pin TSSOP packages only. NV Memory Power on/Preset Mem Tap 3 Addressable ...
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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 ............................................................................................................................. 5 7. FUNCTIONAL DESCRIPTION............................................................................................................ 7 7.1. Potentiometer and ...
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PIN CONFIGURATION FIGURE 2 – PACKAGE TYPES Publication Release Date: January 2003 - 5 - WMS7201 Revision 1.1 ...
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PIN DESCRIPTION PIN NAME PIN NO I/O 2 CLK SDI SDO VA1 - 5 VB1 - 6 ...
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FUNCTIONAL DESCRIPTION The WMS7201 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 The WMS7201 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 TERFACE The WMS7201 contains a four-wire SPI interface: • SDO (Serial Data Output) Used for reading out the internal register contents and for daisy chaining multiple devices on the 10-pin package. • SDI (Serial ...
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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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I S NSTRUCTION ET Inst Instruction Byte No D15 D14 D13 D12 D11 D10 ...
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SDI must be valid on the rising edge of the clock, SDO is valid on the falling edge of the clock Take CS HIGH after the command ...
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Inst. Comman Command Byte No. d Name: 3 Write Tap Register Down ...
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Reading Tap Register and NVMEM Location (10-pin TSSOP package only) The contents of the tap register or any NVMEM location can be read back through the SDO pin. When a command is sent, the data is clocked out on ...
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TIMING DIAGRAMS CLK t LEAD CS t DSU MSB SDI t LAC MSB SDO t RSU 1 R/B t WPSU 2 WP FIGURE 6 – WMS7201 TIMING DIAGRAM Notes: (1) Internal signal only. (2) Only on 10-pin TSSOP package. ...
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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 V – 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 WMS7201 *Assume infinite input impedance Potentiometer divider nonlinearity error test circuit (INL, DNL) No Connection WMS7201 ...
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TYPICAL APPLICATION CIRCUIT Vin WMS7201 OUT − R (256 256 R = Total resistance of potentiometer Wiper setting for WMS7201 ...
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WMS7201 GND FIGURE 10 – WMS7201 TRIMMING VOLTAGE REFERENCE CS\ CLK SDI FIGURE 11 – WMS7201 RF AMP CONTROL 32mA V REFH V REF = 5.0v C1 0.1uF VDD 2 7 CLK VA1 3 ...
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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 DEMINSIONS 8 1 Control demensions are in milmeters . E θ FIGURE 13 – 8L SOIC – 150MIL - 25 - WMS7201 Publication Release Date: January 2003 Revision 1.1 ...
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Dimension in inch Symbol Min A A 0.010 1 A 0.125 2 B 0.016 B 0.058 1 c 0.008 D E 0.290 E ...
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FIGURE 15 – 8L MSOP Publication Release Date: January 2003 - 27 - WMS7201 Revision 1.1 ...
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ORDERING INFORMATION Winbond’s WinPot Part Number Description: WMS72 XX XXX X 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: Dual channels with SPI ...
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VERSION HISTORY VERSION DATE PAGE 1.0 Jan. 2003 All 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 ...