wms7140 Winbond Electronics Corp America, wms7140 Datasheet

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wms7140

Manufacturer Part Number
wms7140
Description
Nonvolatile Digital Potentiometers With Up/down 3-wire Interface, 10kohm, 50kohm, 100kohm Resistance 16 Taps With Optional Output Buffer
Manufacturer
Winbond Electronics Corp America
Datasheet
PRELIMINARY
WMS7140/1
NONVOLATILE DIGITAL POTENTIOMETERS
WITH UP/DOWN (3-WIRE) INTERFACE,
10KOHM, 50KOHM, 100KOHM RESISTANCE
16 TAPS
WITH OPTIONAL OUTPUT BUFFER
Publication Release Date: April 21, 2005
- 1 -
Revision 1.1

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wms7140 Summary of contents

Page 1

... WMS7140/1 NONVOLATILE DIGITAL POTENTIOMETERS WITH UP/DOWN (3-WIRE) INTERFACE, 10KOHM, 50KOHM, 100KOHM RESISTANCE WITH OPTIONAL OUTPUT BUFFER PRELIMINARY 16 TAPS Publication Release Date: April 21, 2005 - 1 - Revision 1.1 ...

Page 2

... GENERAL DESCRIPTION The WMS714x non-volatile linear digital potentiometers available in 10K:, 50K: and 100K: resistance values. The WMS7140/1 can be used as a three-terminal potentiometer two terminal variable resistor in a wide variety of applications. The output of each potentiometer is determined by the wiper position, which varies in linearly between ...

Page 3

... BLOCK DIAGRAM INC Up/Down CS Serial U/D Interface NV Memory V SS Control FIGURE 1 – WMS7140 BLOCK DIAGRAM (Rheostat Mode) INC Up/Down CS Serial U/D Interface NV Memory V SS Control FIGURE 2 – WMS7141 BLOCK DIAGRAM (Divider Mode) NV Memory NVMEM0 NV Memory NVMEM0 Publication Release Date: April 21, 2005 - 3 - WMS7140 ...

Page 4

... Potentiometer Configuration .................................................................................................. 7 7.2. Non-Volatile Memory (NVMEM) ................................................................................................... 7 7.3. Serial Data Interface ..................................................................................................................... 8 7.4. Operation Overview ...................................................................................................................... 8 8. TIMING DIAGRAMS............................................................................................................................ 9 9. ABSOLUTE MAXIMUM RATINGS.................................................................................................... 11 10. ELECTRICAL CHARACTERISTICS ............................................................................................... 12 10.1 Test Circuits............................................................................................................................... 14 11. TYPICAL APPLICATION CIRCUITS .............................................................................................. 15 11.1. Layout Considerations .............................................................................................................. 17 12. PACKAGE DRAWINGS AND DIMENSIONS.................................................................................. 18 13. ORDERING INFORMATION........................................................................................................... 21 14. VERSION HISTORY ....................................................................................................................... WMS7140/1 ...

Page 5

... PIN CONFIGURATION 1 INC U 8-MSOP 1 INC 2 U 8-PDIP INC Publication Release Date: April 21, 2005 - 5 - WMS7140 8-SOIC Revision 1.1 ...

Page 6

... Chip Select. When CS is HIGH, the part is deselected and the device will be in the standby mode. CS LOW enables the part, placing it in the active power mode Low terminal of WinPot Wiper terminal of WinPot (can be buffered), its position on the resistor array is controlled by the inputs on INC , and WMS7140/1 terminal A ...

Page 7

... R OTENTIOMETER AND The WMS7140/1 can operate as either a rheostat potentiometer (voltage divider). When in the potentiometer configuration there are two possible modes. One is done using WMS7140 Winpot device without the output buffer and the other mode is done with WMS7141 WinPot device with the output buffer ...

Page 8

... The operating modes of Up/Down are summarized below Low High Low Low to High Low to High High Note: x means don’t care INC High to Low Low High to Low x High x Low WMS7140/1 Operation Wiper toward V A Wiper toward V B Store Wiper Position No Store, Return to Standby Standby ...

Page 9

... INC FIGURE 3 –WMS7140/1 TIMING DIAGRAM Note: [ the AC Timing diagram (Figure 3) refers to the minimum incremental change in the wiper output due to a change in the wiper position 0V ...

Page 10

... Power-Up rate CC SYMBOL MIN. t 100 100 ID t 250 IL t 250 100 CPH 15 (2.7V) t CPH CYC 0.2 (13ms 0-2.7V WMS7140/1 MAX. UNITS 500 V/ms ( 0-2.7V) ...

Page 11

... Stresses above those listed may cause permanent damage to the device. Exposure to the absolute maximum ratings may affect device reliability. Functional operation is not implied at these conditions 150ºC -65º to +150ºC (V – 0.3V -0.3 to 7.0V 0ºC to +70ºC -20ºC to +70ºC -40ºC to +85ºC +2.7V to +5.5V 0V Publication Release Date: April 21, 2005 - 11 - WMS7140/1 [1] Values + 0.3V) DD Values Revision 1.1 ...

Page 12

... 1.5 10K BW 300 50K BW 200 100K OUT Rout 1 THD V 0. WMS7140/1 MAX. UNITS CONDITIONDS +20 % T=25º LSB +1 LSB ppm Ÿ V =5V, I=V DD Ÿ V =2.7V, I Bits +1 LSB +1 LSB Code = 80h ppm LSB Code = Full Scale ...

Page 13

... OUT V 2 0.5 DDR I 1 DDW [3] I 0.5 SA [4] I 0.1 SB PSRR ) / (T- 1); DNL = ( LSB; INL = ( WMS7140/1 MAX. UNITS CONDITIONDS 0 =2mA ,Vin=Vss ~ ,Vin =5V 1Mhz =5V 1Mhz DD 5.5 V All ops except NVMEM ...

Page 14

... Power supply sensitivity test circuit (PSS, PSRR Capacitance test circuit /R DD Total ~ V IN OFFSET /I GND MS W 2.5V DC Gain vs . frequency test circuit FIGURE 4 – TEST CIRCUITS - 14 - WMS7140 10 PSRR(dB) = 20LOG ( PSS(%/% ) = ' WMS71xx ...

Page 15

... Vin WMS71XX OUT (256 256 R = Total resistance of potentiometer Wiper setting for WMS71XX FIGURE 5 – PROGRAMMABLE INVERTING GAIN AMPLIFIER USING THE WMS7140 (1+ ) OUT (256  256 R = Total resistance of potentiometer ...

Page 16

... WMS71xx GND FIGURE 7 – WMS7140/1 TRIMMING VOLTAGE REFERENCE CS\ U/D\ INC\ FIGURE 8 – WMS7140/1 RF AMP CONTROL 32mA V REFH V REF = 5.0v C1 0.1uF CS U/ INC WMS71xx WINPOT - 16 - WMS7140/1 VDD L1 CHOKE RF OUT Q1 FILTER RF POWER AMP C2 RF Input ...

Page 17

... DIGITAL CONTROL LINES U/D ANALOG V A SIGNAL LINE and V pins. Care should be taken to separate the analog and DD SS CAP FIGURE 9 – WMS7140/1 LAYOUT - 17 - WMS7140/1 pin. This is recommended for best V DD DIGITAL CS CONTROL LINE V B ANALOG SIGNAL LINES V W Publication Release Date: April 21, 2005 ...

Page 18

... DIMENSION IN MM DIMENSION IN INCH MIN. MAX. MIN. MAX. 1.35 0.053 0.069 1.75 0.10 0.010 0.004 0.25 0.33 0.51 0.013 0.020 0.19 0.25 0.008 0.010 3.80 0.150 0.157 4.00 4.80 5.00 0.188 0.196 0.050 BSC 1.27 BSC 6.20 5.80 0.228 0.244 0.10 0.004 0.40 1.27 0.016 0.050 FIGURE 10: 8L 150MIL SOIC - 18 - WMS7140 0.25 GAUGE PLANE ...

Page 19

... FIGURE 11: 8L 300MIL PDIP Publication Release Date: April 21, 2005 - 19 - WMS7140 Revision 1.1 ...

Page 20

... FIGURE 12: 8L 3MM MSOP - 20 - WMS7140/1 ...

Page 21

... WMS7140 010P WMS7140 050S WMS7140 050P WMS7140 100S WMS7140 100P WMS7141 010S WMS7141 010P WMS7141 050S WMS7141 050P WMS7141 100S WMS7141 100P Publication Release Date: April 21, 2005 - 21 - WMS7140/1 MSOP WMS7140 010M WMS7140 050M WMS7140 100M WMS7141 010M WMS7141 050M WMS7141 100M Revision 1.1 ...

Page 22

... VERSION HISTORY VERSION DATE 1.0 June 2003 Initial issue 1.1 April 2005 Revise disclaim section DESCRIPTION - 22 - WMS7140/1 ...

Page 23

... Yan An W. Rd. Shanghai, 200336 China TEL: 86-21-62365999 FAX: 86-21-62356998 Winbond Electronics (H.K.) Ltd. Unit 9-15, 22F, Millennium City, No. 378 Kwun Tong Rd., Kowloon, Hong Kong TEL: 852-27513100 FAX: 852-27552064 Publication Release Date: April 21, 2005 - 23 - WMS7140/1 ® ® ChipCorder ® ® and ISD are trademarks of Revision 1.1 ...

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