MCP41100-I/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
The MCP41100-I/SN is a single-channel 100 kΩ digital potentiometer from Microchip with 256 resistor taps controlled via a 3-wire SPI interface. It provides programmable resistance adjustment in an 8-pin SOIC package for gain control, offset trimming, and tunable filter designs.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP41100-I/SN Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Single-channel 100 kΩ digital potentiometer with 256 resistor tap positions for fine-grained control
- 3-wire SPI serial interface enabling microcontroller-controlled resistance adjustment without mechanical parts
- End-to-end resistance of 100 kΩ with nominal 145 Hz bandwidth for audio and analog signal paths
- Non-volatile wiper position retention options available in pin-compatible family variants
- 8-pin SOIC-8 package for compact SMT placement in analog control circuits
- Pb-free RoHS compliant with JESD-609 e3 lead-free code
Applications
The MCP41100-I/SN is used in programmable gain amplifiers, digitally adjustable voltage references, and calibration circuits where mechanical potentiometers must be replaced with a microcontroller-driven solution. It also finds application in audio volume control, LCD display contrast adjustment, and tunable RC filter networks in consumer electronics and industrial sensor conditioning equipment.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-8 |
| Factory Lead Time | 6Weeks |
| YTEOL | 8 |
| Bandwidth-Nom | 0.145kHz |
| Control Interface | 3-WIRE SERIAL |
| Converter Type | DIGITAL POTENTIOMETER |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Positions | 256 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.23 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Resistance Law | LINEAR |
| Resistance Tolerance-Max | 20% |
| Resistor Terminal Voltage-Max | 5V |
| Screening Level | TS 16949 |
| Supply Current-Max | 0.6mA |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Coefficient-Nom | 800ppm/°C |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Total Resistance-Nom | 100000Ω |
| ## MCP41100-I/SN Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP41100-I/SN:
Digital Potentiometer, 1 Func, 100000ohm, 3-wire Serial Control Interface, 256 Positions, CMOS, PDSO8
suggested
suggested
suggested
Frequently Asked Questions
How many resistance steps does MCP41100-I/SN provide and what is the step resolution for a 100 kΩ end-to-end resistance?
MCP41100-I/SN provides 256 discrete wiper positions across its 100 kΩ end-to-end resistance, giving a nominal step size of approximately 391 Ω per step, which is sufficient for fine gain trimming and offset calibration in precision analog circuits.
What SPI clock speed and interface protocol does MCP41100-I/SN use for wiper position control?
MCP41100-I/SN uses a 3-wire SPI interface with CS, SCK, and SI lines; it accepts SPI clock frequencies up to 10 MHz, allowing a microcontroller to update the wiper position in a single 16-bit SPI transaction, which takes under 2 µs at maximum clock speed.
In which analog signal-conditioning designs is MCP41100-I/SN preferred over a fixed-value resistor network?
MCP41100-I/SN is chosen when resistance must be adjusted at runtime, such as in programmable gain amplifiers with 256 gain steps, digitally tunable low-pass filters with 100 kΩ adjustable pole frequency, and auto-calibration circuits where factory trimming is replaced by firmware-controlled compensation across temperature and aging.
Does MCP41100-I/SN retain its wiper position after power is removed?
The standard MCP41100 series uses volatile wiper storage, so the wiper resets to the mid-scale position (128 out of 256 steps) at power-up; for non-volatile wiper retention across power cycles, Microchip offers the MCP42100 dual-channel variant or the MCP4151 with EEPROM-based wiper memory.
What lead time and package options should buyers consider when sourcing MCP41100-I/SN for volume production?
Factory lead time for MCP41100-I/SN in the 8-pin SOIC-8 package is approximately 6 weeks; for volume production, buyers can also evaluate the MCP41100T tape-and-reel variant for automated SMT assembly, reducing per-unit handling cost while maintaining the same 100 kΩ, 256-step digital potentiometer specification.
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