{"id":3231,"date":"2026-06-01T00:06:59","date_gmt":"2026-06-01T00:06:59","guid":{"rendered":"https:\/\/materialparts.com\/mcp42100-i-sl\/"},"modified":"2026-06-01T00:12:45","modified_gmt":"2026-06-01T00:12:45","slug":"mcp42100-i-sl","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/mcp42100-i-sl\/","title":{"rendered":"MCP42100-I\/SL"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The MCP42100-I\/SL from Microchip Technology is a dual-channel 8-bit (256-tap) digital potentiometer with 100 kOhm end-to-end resistance and SPI interface in a 14-pin SOIC package. It features less than 1 uA static current, +\/-1 LSB INL\/DNL, and shutdown mode for maximum power savings.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n
Resolution<\/td>\n8-bit (256 taps)<\/td>\n<\/tr>\n
\u6e20\u9053<\/td>\n2 (dual)<\/td>\n<\/tr>\n
Resistance<\/td>\n100 kOhm<\/td>\n<\/tr>\n
Tolerance<\/td>\n+\/-30%<\/td>\n<\/tr>\n
Interface<\/td>\nSPI (Mode 0,0 and 1,1)<\/td>\n<\/tr>\n
Bandwidth (-3dB)<\/td>\n145 MHz typical<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n2.7 V to 5.5 V<\/td>\n<\/tr>\n
Static Supply Current<\/td>\n1 uA max<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Dual independent potentiometer channels in one package<\/li>\n
  • 256-position resolution with +\/-1 LSB INL and DNL<\/li>\n
  • Linear taper with potentiometer or rheostat configuration<\/li>\n
  • Software shutdown disconnects A terminal and connects wiper to B<\/li>\n
  • Hardware SHDN pin for shutdown control<\/li>\n
  • Hardware reset (RS) pin returns wiper to mid-scale (80h)<\/li>\n
  • Multiple devices can be daisy-chained via SO pin<\/li>\n
  • Channel-to-channel resistance matching < 1%<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Audio volume and tone control<\/li>\n
    • Servo-motor control and battery charging<\/li>\n
    • Programmable filters and gain adjustment<\/li>\n
    • LCD contrast and brightness control<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MCP42100-I\/SL from Microchip Technology is a dual-channel 8-bit (256-tap) digital potentiometer with 100 kOhm end-to-end resistance and SPI interface in a 14-pin SOIC package. It features less than 1 uA static current, +\/-1 LSB INL\/DNL, and shutdown mode for maximum power savings. Key Specifications Resolution 8-bit (256 taps) Channels 2 (dual) Resistance […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,13],"tags":[],"chip_brand":[134],"class_list":["post-3231","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-microchip"],"acf":{"brief_explanation":"Dual 8-bit 100kOhm digital pot, SPI, 256-tap, shutdown, daisy-chain, SOIC-14","date_code":"","package_case":"SOIC-14 (8.65 x 3.90 x 1.27 mm)","in_stock":7600,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/11195C.pdf","price":"$2.15 @ 1ku","product_introduction":"The MCP42100-I\/SL from Microchip Technology is a dual-channel 8-bit digital potentiometer with 100 kOhm end-to-end resistance and an SPI serial interface in a 14-pin SOIC package. Each of the two independent channels provides 256 tap positions with linear taper, allowing the wiper position to be set with +\/-1 LSB integral and differential nonlinearity. The device operates from a single 2.7 V to 5.5 V supply and consumes less than 1 uA in static operation, making it ideal for battery-powered applications. A software shutdown feature disconnects the A terminal from the resistor stack and simultaneously connects the wiper to the B terminal, while the hardware SHDN pin provides the same function externally. The RS (reset) pin returns both wipers to the mid-scale position (80h) on power-up or when asserted. The SPI interface includes both SI (serial input) and SO (serial output) pins, enabling daisy-chaining of multiple MCP42XXX devices for systems requiring more than two potentiometer channels. The channel-to-channel resistance matching is within 1%.","working_principle":"The MCP42100-I\/SL operates through three functional blocks: (1) The SPI interface receives 16-bit command words (8-bit command + 8-bit data) through the SI pin. The command byte selects the channel and operation (write data, shutdown, or no operation), while the data byte sets the wiper position (00h to FFh). The SO pin shifts out data from the internal registers, enabling daisy-chaining of multiple devices where data is clocked through one device to the next. (2) Each potentiometer channel consists of a 255-element resistor string with CMOS switches connected to each tap point. The wiper register value selects which tap is connected to the PW terminal. The resistance between PA and the wiper varies linearly with the register value. In shutdown mode, the PA terminal is disconnected and the wiper is connected to PB. (3) The control logic decodes the command byte and routes the data byte to the selected channel's wiper register. The hardware RS pin resets both wiper registers to 80h (mid-scale), and the SHDN pin forces both channels into shutdown simultaneously. Wiper position changes occur on the rising edge of CS.","pin_description":"
      Pin No.<\/td>Pin Name<\/td>Function<\/td><\/tr>
      1<\/td>PB0<\/td>Channel 0 terminal B<\/td><\/tr>
      2<\/td>PA0<\/td>Channel 0 terminal A<\/td><\/tr>
      3<\/td>VDD<\/td>Supply voltage (2.7-5.5 V)<\/td><\/tr>
      4<\/td>PW0<\/td>Channel 0 wiper<\/td><\/tr>
      5<\/td>VSS<\/td>Ground<\/td><\/tr>
      6<\/td>CS<\/td>Chip select (active low)<\/td><\/tr>
      7<\/td>SCK<\/td>Serial clock<\/td><\/tr>
      8<\/td>SI<\/td>Serial data input<\/td><\/tr>
      9<\/td>SO<\/td>Serial data output (daisy-chain)<\/td><\/tr>
      10<\/td>RS<\/td>Hardware reset (active low)<\/td><\/tr>
      11<\/td>SHDN<\/td>Hardware shutdown (active low)<\/td><\/tr>
      12<\/td>PW1<\/td>Channel 1 wiper<\/td><\/tr>
      13<\/td>PB1<\/td>Channel 1 terminal B<\/td><\/tr>
      14<\/td>PA1<\/td>Channel 1 terminal A<\/td><\/tr><\/table>","application_scenarios":"
      • Audio equipment volume and tone control where dual channels provide left\/right balance adjustment via SPI with less than 1% channel matching<\/li>
      • Programmable filter and oscillator circuits where 145 MHz bandwidth and 256-tap resolution enable precise frequency and Q-factor tuning<\/li>
      • Battery charger current and voltage regulation using the digital potentiometer to set feedback dividers under microcontroller control<\/li>
      • LCD contrast and brightness control in embedded displays where the shutdown mode reduces power consumption when the display is off<\/li><\/ul>","alternative_models":"
        Model<\/td>Brand<\/td>Channels<\/td>Resistance<\/td>Package<\/td><\/tr>
        MCP42100T-I\/SL<\/td>Microchip<\/td>2<\/td>100 kOhm<\/td>SOIC-14<\/td><\/tr>
        MCP4251-104-E\/SL<\/td>Microchip<\/td>2<\/td>100 kOhm<\/td>SOIC-14<\/td><\/tr>
        AD5262BRUZ100<\/td>ADI<\/td>2<\/td>100 kOhm<\/td>TSSOP-14<\/td><\/tr>
        MAX5494ETE+T<\/td>Maxim<\/td>2<\/td>100 kOhm<\/td>TQFN-16<\/td><\/tr>
        X9C103S8IZ<\/td>Intersil<\/td>1<\/td>10 kOhm<\/td>SOIC-8<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3231","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=3231"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3231\/revisions"}],"predecessor-version":[{"id":3247,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3231\/revisions\/3247"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3231"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3231"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3231"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}