WMS7201 PDF даташит
Спецификация WMS7201 изготовлена «Winbond» и имеет функцию, называемую «256-TAP NON-VOLATILE DIGITAL POTENTIOMETER». |
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Детали детали
Номер произв | WMS7201 |
Описание | 256-TAP NON-VOLATILE DIGITAL POTENTIOMETER |
Производители | Winbond |
логотип |
29 Pages
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PRELIMINARY
WMS7201
256-TAP NON-VOLATILE DIGITAL POTENTIOMETER
Publication Release Date: January 2003
- 1 - Revision 1.1
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WMS7201
1. 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 or
as a two terminal variable resistor in a wide variety of applications.
The output of the potentiometer is determined by the wiper position, which varies linearly between VA
and VB terminal according to the content stored in the volatile Tap Register (TR). The settings of the
TR can be provided either directly by the user through the industry standard SPI interface, or by the
non-volatile memory (NVMEM0~3) where the previous settings are stored. When changes are made
to the TR to establish a new wiper position, the value of the setting can be saved into any non-volatile
memory location (NVMEM0~3) by executing a NVMEM save operation. Upon powerup the content of
the NVMEM0 is automatically loaded to the Tap Register.
The WMS7201 contains a single potentiometer in 8-pin PDIP, SOIC, MSOP or 10 pin TSSOP
packages and can operate over a wide operating voltage range from 2.7V to 5.5V. A selectable output
buffer is built-in for those applications where an output buffer is required.
2. FEATURES
• 256 taps for the potentiometer
• End-to-end resistance available in 10KΩ, 50KΩ and 100KΩ
• Selectable output buffer for each channel
• SPI Serial Interface for data transfer and potentiometer control
• Daisy-chain operation for multiple devices (10-pin TSSOP package only)
• Nonvolatile storage of four wiper positions per channel with power-on recall from NVMEM0
• Low standby current (1µA Max. with output buffer inactive)
• Endurance 100K typical stores per bit
• Register Data Retention 100 years
• Industrial temperature range: -40 ~ 85°C
• Wide operating voltage range: 2.7V ~ 5.5V
• Package option:
8-pin MSOP, 8-pin SOIC, 8-pin PDIP, 10-pin TSSOP
-2-
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3. BLOCK DIAGRAM
WMS7201
CLK
Serial
CS
Interface
SDI
1
SDO
1
WP
VDD
NV Memory
Control
VA1
VW1
NV Memory
Power on/Preset Mem Tap
3 Addressable Preset Tap values
9th
bit
9th
bit
VB1
VSS
FIGURE 1 – WMS7201 BLOCK DIAGRAM
Note 1: Available in 10-pin TSSOP packages only.
Publication Release Date: January 2003
- 3 - Revision 1.1
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Номер в каталоге | Описание | Производители |
WMS7201 | 256-TAP NON-VOLATILE DIGITAL POTENTIOMETER | Winbond |
WMS7202 | 256-TAP DUAL-CHANNEL NON-VOLATILE DIGITAL | Winbond |
WMS7204 | 256-TAP QUAD-CHANNEL NON-VOLATILE DIGITAL POTENTIOMETER | Winbond |
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