My Inquiry
My Account
Microchip Technology MCP41050T-I/SN
- Part No.:
- MCP41050T-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Digital Potentiometers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MCP41050T-I/SN.pdf
- Description:
- IC DGTL POT 50KOHM 256TAP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:932
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP41050T-I/SN from Microchip Technology is a single-channel, 256-tap digital potentiometer with 50 kΩ nominal resistance, SPI™ serial interface (mode 0,0 and 1,1), ±1 LSB max INL/DNL, and industrial temperature range (–40°C to +85°C). It functions as a programmable rheostat or voltage divider in precision gain/offset calibration circuits for sensor signal conditioning.
For engineers reviewing the MCP41050T-I/SN datasheet, MCP41050T-I/SN pinout, MCP41050T-I/SN application, or MCP41050T-I/SN equivalent, key selection criteria include wiper resistance (125 Ω typ at VDD = 5.5 V), static supply current (0.01 µA min), 8-bit resolution, shutdown capability via software command, and SOIC-8 package compatibility with PCB space-constrained analog front-ends.
Technical Context
The MCP41050T-I/SN implements an 8-bit wiper register controlling a linear 50 kΩ resistor array with terminals PA0, PB0, and PW0. Its SPI interface operates in modes 0,0 and 1,1 with Schmitt-triggered CS, SCK, and SI pins, enabling robust noise immunity in mixed-signal environments.
It supports both rheostat mode (A–W or B–W) and potentiometer mode (A–B with W as tap), with monotonic 8-bit transfer function, full-scale error of –1 to 0 LSB at VDD = 5 V, and voltage range of 0 to VDD across all resistor terminals - no polarity restrictions between A, B, and W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Resistance | 50 kΩ ±15% at +25°C - defines maximum end-to-end resistance for gain-setting and biasing applications. |
| Resolution | 8-bit (256 taps) - enables 0.39% step resolution for fine analog tuning in closed-loop systems. |
| INL / DNL | ±1 LSB max - ensures monotonicity and predictable linearity for precision voltage division and calibration. |
| Wiper Resistance | 125 Ω typical at VDD = 5.5 V, code 00h - directly impacts minimum achievable resistance and low-end accuracy in rheostat mode. |
| Supply Current (Static) | 0.01 µA min, 1 µA max - enables ultra-low-power operation in battery-backed or always-on sensor interfaces. |
| Operating Voltage | 2.7 V to 5.5 V - supports direct integration with 3.3 V and 5 V microcontrollers without level-shifting. |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade embedded control and automotive cabin electronics. |
Pinout & Package
Package: 8-pin SOIC (SOIC-8, 3.9 mm × 4.9 mm), surface-mount, RoHS-compliant, rated for industrial temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | SPI Chip Select | Active-low enable for SPI command execution; Schmitt-trigger input rejects noise on shared bus lines. |
| 2 - SCK | SPI Clock Input | Rising-edge sampling of SI; gated by CS - no current draw when CS high, reducing dynamic power. |
| 3 - SI | SPI Serial Data Input | Accepts 16-bit command/data frame (8-bit address + 8-bit wiper value); Schmitt-triggered for rail-to-rail logic compatibility. |
| 4 - VSS | Ground Reference | Analog and digital ground common node - must be low-impedance and separated from noisy digital returns. |
| 5 - PA0 | Potentiometer Terminal A | High-side resistor endpoint; tied to VDD or signal source in voltage divider configurations. |
| 6 - PW0 | Wiper Output | Programmable tap point; connects to op-amp inputs, ADC references, or feedback nodes requiring dynamic adjustment. |
| 7 - PB0 | Potentiometer Terminal B | Low-side resistor endpoint; often grounded or connected to reference voltage in rheostat mode. |
| 8 - VDD | Power Supply | Single 2.7–5.5 V supply powers both digital interface and analog resistor array - no separate AVDD required. |
Key Features
| Feature | Design Value |
|---|---|
| Software Shutdown Command | Opens PA0 connection and shorts PW0 to PB0 - reduces system leakage and eliminates wiper path current during sleep. |
| Mid-Scale Power-Up Default | Wiper auto-initializes to code 80h (128/256) - prevents undefined output state and ensures safe startup in gain-control loops. |
| Low Wiper Tempco | 1 ppm/°C (voltage divider mode, code 80h) - maintains stable division ratio over temperature without external compensation. |
| Daisy-Chain Ready Architecture | Compatible with MCP42XXX dual-series layout - allows future upgrade to dual-channel without board redesign. |
| High Noise Immunity | Schmitt-trigger inputs on CS, SCK, SI - tolerates slow-rising clock edges and EMI in industrial enclosures. |
Applications
| Audio Signal Level Control | Laser Diode Bias Calibration |
|---|---|
|
Use Scenario: Programmable volume control in professional audio mixers using op-amp-based attenuators. IC Role / Device Role / Timing Role: Acts as digitally adjustable series/shunt resistor in inverting/non-inverting amplifier feedback paths. Use Value: Enables remote firmware-controlled gain adjustment with 0.39% step resolution and <1 LSB nonlinearity - eliminating mechanical wear and drift. |
Use Scenario: Precision bias current setting for fiber-optic transceiver laser diodes in telecom modules. IC Role / Device Role / Timing Role: Configures reference voltage for constant-current source ICs (e.g., LM334) in closed-loop bias circuits. Use Value: Delivers 50 kΩ range with 125 Ω wiper resistance and ±1 LSB INL - ensuring repeatable, temperature-stable bias points across production units. |
| Industrial Sensor Offset Trim | Medical Instrument Gain Scaling |
|
Use Scenario: Factory calibration of thermocouple or RTD signal conditioners to null thermal EMF and amplifier offset errors. IC Role / Device Role / Timing Role: Provides one-time or field-updatable DC offset injection into instrumentation amplifier inputs. Use Value: Supports SPI write-only configuration during manufacturing test; retains setting through power cycles - eliminating trim-pot rework. |
Use Scenario: Adjustable gain stage in portable ECG or pulse oximeter front-ends where signal amplitude varies with patient contact. IC Role / Device Role / Timing Role: Sets feedback resistance in programmable-gain instrumentation amplifiers (PGIAs) for dynamic range optimization. Use Value: Offers 8-bit monotonic response and 2.7–5.5 V operation - enabling direct MCU control without external level shifters or LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5204BRUZ10 | Quad-channel, 10 kΩ, I²C interface, 200 kΩ wiper resistance, no shutdown command. | Requires I²C host; higher wiper resistance limits low-resistance rheostat use; quad channel adds routing complexity for single-pot needs. | Select when multi-channel trimming is needed and I²C infrastructure exists; avoid for SPI-only or ultra-low-wiper-resistance designs. |
| MCP42050-I/P | Dual-channel, 50 kΩ, same SPI interface, includes hardware SHDN/RS pins and SO for daisy-chaining. | 14-pin PDIP package; larger footprint; extra channel and pins increase cost and layout area for single-pot applications. | Select only if dual independent pots or hardware reset/shutdown are required; MCP41050T-I/SN remains optimal for space- and cost-sensitive single-channel use. |
Compared with AD5204BRUZ10 and MCP42050-I/P, the MCP41050T-I/SN delivers optimal trade-offs for single-channel, SPI-based, low-wiper-resistance applications - offering smallest footprint, lowest static current (0.01 µA), and native SOIC-8 compatibility without unused pins or interface overhead.
Availability
MCP41050T-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, medical instrument gain scaling, audio signal conditioning, and laser diode bias control requiring stable component supply across long-lifecycle embedded programs.
Supply support for MCP41050T-I/SN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontroller, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The MCP41XXX family was designed specifically for replacing mechanical potentiometers in precision analog control applications - emphasizing low power, SPI simplicity, industrial reliability, and seamless integration with 8-bit and 32-bit microcontrollers.
FAQ
What is the wiper resistance specification for MCP41050T-I/SN at 2.7 V supply?
The MCP41050T-I/SN exhibits a wiper resistance of 175 Ω to 250 Ω at VDD = 2.7 V and IW = 1 mA (code 00h), per DS11195C-page 3. This value directly affects minimum achievable resistance in rheostat mode and must be accounted for in low-impedance feedback networks. The MCP41050T-I/SN's wiper resistance remains stable across its industrial temperature range.
Does MCP41050T-I/SN support hardware reset or shutdown pins?
No - the MCP41050T-I/SN is a single-channel device and does not include RS or SHDN pins; those are exclusive to the dual-channel MCP42XXX series (e.g., MCP42050). Reset and shutdown functionality for MCP41050T-I/SN is implemented exclusively via SPI commands: a software shutdown command opens PA0 and shorts PW0 to PB0, while power-up automatically loads mid-scale (80h).
Can MCP41050T-I/SN operate from a 3.3 V supply in industrial temperature range?
Yes - the MCP41050T-I/SN is fully specified for 2.7 V to 5.5 V operation across –40°C to +85°C. At VDD = 3.3 V, it maintains ±1 LSB INL/DNL, 1 µA max static current, and full SPI timing compliance (tSU = 40 ns, tHD = 10 ns), making it ideal for modern 3.3 V microcontroller-based systems without level translation.
What is the maximum SPI clock frequency supported by MCP41050T-I/SN?
The MCP41050T-I/SN supports up to 10 MHz SPI clock frequency at VDD = 5 V (DS11195C-page 5). At lower supplies (e.g., 3.3 V), timing margins remain sufficient for reliable 5–7 MHz operation. Critical parameters include tHI/tLO ≥ 40 ns, tSU ≥ 40 ns, and tHD ≥ 10 ns - all met within standard MCU SPI peripheral capabilities.
How does MCP41050T-I/SN handle power-up initialization?
Upon power-up, the MCP41050T-I/SN automatically loads code 80h (128 decimal) into its wiper register, positioning the wiper at mid-scale - regardless of prior state or supply ramp rate. This behavior ensures a known, safe output impedance for connected circuitry and eliminates need for host MCU initialization sequence before first use of the MCP41050T-I/SN.
MCP41050T-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 256
- Resistance (Ohms):
- 50k
- Interface:
- SPI
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- -
- Tolerance:
- ±30%
- Temperature Coefficient (Typ):
- 800ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 175
MCP41050T-I/SN FAQ
1.How can I place an order for MCP41050T-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP41050T-I/SN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MCP41050T-I/SN reliable?
The price and inventory of MCP41050T-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP41050T-I/SN is usually 5 days.
3.What payment methods are accepted for MCP41050T-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP41050T-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP41050T-I/SN?
MCP41050T-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP41050T-I/SN order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MCP41050T-I/SN?
For technical support, including MCP41050T-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP41050T-I/SN requirements.
6.How does Aetrix verify that MCP41050T-I/SN is sourced from the original manufacturer or authorized distributors?
All MCP41050T-I/SN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCP41050T-I/SN meets industry standards.
7.What is the process for return or replacement of MCP41050T-I/SN?
All MCP41050T-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with MCP41050T-I/SN, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MCP41050T-I/SN part is unused and in its original packaging.
Return procedure for MCP41050T-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP41050T-I/SN Tags
-
MCP4018T-103E/LT
Microchip Technology
-
MCP4018T-503E/LT
Microchip Technology
-
MCP4011T-103E/SN
Microchip Technology
-
MCP4018T-104E/LT
Microchip Technology
-
MCP4017T-503E/LT
Microchip Technology
-
MCP4018T-502E/LT
Microchip Technology
-
MCP4017T-103E/LT
Microchip Technology
-
MCP4531T-103E/MF
Microchip Technology
-
MCP4021T-202E/SN
Microchip Technology
-
MCP4023T-103E/CH
Microchip Technology
-
MCP4022T-503E/CH
Microchip Technology
-
MCP4551T-502E/MS
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
