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Microchip Technology MCP4331-503E/ML
- Part No.:
- MCP4331-503E/ML
- Manufacturer:
- Microchip Technology
- Category:
- Digital Potentiometers
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
MCP4331-503E/ML.pdf
- Description:
- IC DGTL POT 50KOHM 129TAP 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,616
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Product details
Overview
MCP4331-503E/ML from Microchip Technology is a 7-bit quad volatile digital potentiometer in 20-pin QFN (4×4 mm) package, featuring four independent 50 kΩ resistor networks with 129-tap resolution, 75 Ω typical wiper resistance, and SPI interface operating up to 10 MHz. It supports potentiometer or rheostat configurations, operates from 1.8V to 5.5V, and targets precision gain/offset trimming in industrial sensor signal conditioning circuits.
For engineers reviewing the MCP4331-503E/ML datasheet, MCP4331-503E/ML pinout, MCP4331-503E/ML application, or MCP4331-503E/ML equivalent, key selection criteria include RAB tolerance (±20%), absolute tempco (50 ppm/°C), wiper disconnect capability via TCON register, reset input functionality, and compatibility with split-rail analog systems requiring high-voltage tolerant digital inputs (up to 12.5 V).
Technical Context
The MCP4331-503E/ML integrates four independent 7-bit resistor networks (RAB = 50 kΩ ±20%), each with digitally controlled wiper position, terminal disconnect control (TCON), and mid-scale power-on reset wiper setting (0x40). Its SPI interface supports Modes 0,0 and 1,1 at up to 10 MHz (VDD ≥ 2.7 V), enabling fast reconfiguration of all four pots in under 10 µs per write cycle.
Designed for analog front-end calibration, it features low 75 Ω typical wiper resistance, 15 ppm/°C ratiometric tempco (potentiometer mode), and guaranteed monotonicity with no missing codes. The device includes brown-out reset protection (1.5 V typical), serial interface inactive current of 2.5 µA, and internal weak pull-ups on all digital inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RAB Resistance | 50 kΩ ±20% - defines full-scale analog attenuation/gain range and sets maximum current handling (2.5 mA max per terminal) |
| Resolution | 7-bit / 129 taps - provides 0.78% step resolution for fine analog adjustment without excessive code granularity |
| Wiper Resistance | 75 Ω typical - minimizes insertion loss and nonlinearity error in voltage-divider configurations |
| Tempco (Absolute) | 50 ppm/°C (0°C to 70°C) - ensures stable resistance value across temperature in rheostat-mode applications |
| SPI Speed | 10 MHz max (VDD ≥ 2.7 V) - enables sub-10 µs wiper updates for real-time closed-loop calibration |
| Supply Range | 1.8 V to 5.5 V - supports operation from single Li-ion battery (3.0 V nominal) up to 5 V logic rails |
| Digital Input Tolerance | Up to 12.5 V - allows direct interfacing with 12 V control signals without level-shifting circuitry |
Pinout & Package
Package: 20-pin QFN (4 mm × 4 mm, exposed thermal pad), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0A, P0W, P0B | Potentiometer 0 terminals A/W/B | Resistor network 0 end-to-end (A–B) and wiper (W); configurable as pot or rheostat |
| P1A, P1W, P1B | Potentiometer 1 terminals A/W/B | Independent resistor network 1; electrically isolated from other pots |
| P2A, P2W, P2B | Potentiometer 2 terminals A/W/B | Third 50 kΩ network; supports simultaneous multi-channel calibration |
| P3A, P3W, P3B | Potentiometer 3 terminals A/W/B | Fourth network; enables full 4-channel analog tuning in compact layout |
| VDD, VSS | Power supply and ground | Supports 1.8–5.5 V operation; VSS serves as analog and digital reference |
| CS, SCK, SDI, SDO | SPI interface signals | Standard 4-wire SPI; SDO tri-states when CS high; supports daisy-chaining |
| RESET | Asynchronous reset input | Drives all wipers to mid-scale (0x40) and clears TCON registers on active-low pulse |
| NC | No-connect | Pin 3 is unconnected; must be left floating or tied to VSS per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent 50 kΩ networks | Enables simultaneous calibration of four analog signal paths (e.g., multi-sensor front-end) without inter-channel crosstalk |
| Wiper terminal disconnect (TCON) | Allows open-circuiting of wiper from A/B terminals to eliminate leakage paths during standby or fault conditions |
| Mid-scale POR wiper setting | Guarantees known startup state (50% RAB) for predictable system behavior after power-up or reset |
| Brown-out reset (1.5 V typical) | Prevents erratic wiper movement or SPI corruption during undervoltage transients in industrial environments |
| High-voltage tolerant digital inputs | Eliminates external level shifters when interfacing with 12 V PLC I/O or automotive control signals |
Applications
| Industrial Sensor Signal Conditioning | Programmable Gain Amplifier Calibration |
|---|---|
|
Use Scenario: Calibrating offset and gain errors in 4–20 mA transmitter analog front-ends across temperature. IC Role / Device Role / Timing Role: MCP4331-503E/ML acts as four independent trim-pots - one per channel - adjusting feedback resistors in instrumentation amplifiers. Use Value: Enables factory and field calibration via SPI without manual potentiometers; 50 kΩ value matches standard PGA feedback networks while 75 Ω wiper resistance minimizes gain error. |
Use Scenario: Setting precise closed-loop gain in programmable gain instrumentation amplifiers used in data acquisition systems. IC Role / Device Role / Timing Role: MCP4331-503E/ML configures gain-setting resistors in PGA feedback paths; updated dynamically during system self-test. Use Value: 7-bit resolution provides 0.78% gain step accuracy; 10 MHz SPI allows <10 µs reconfiguration for adaptive range switching. |
| Multi-Channel ADC Reference Trimming | Split-Rail Analog Biasing |
|
Use Scenario: Fine-tuning reference voltage dividers for 16-bit SAR ADCs in precision measurement equipment. IC Role / Device Role / Timing Role: MCP4331-503E/ML adjusts top/bottom resistors in dual-ratio reference dividers to correct INL/DNL across temperature. Use Value: 15 ppm/°C ratiometric tempco ensures stable divider ratio; 50 kΩ value limits thermal noise contribution (<0.9 nV/√Hz). |
Use Scenario: Generating matched bias voltages for rail-to-rail op-amps in ±5 V or ±12 V analog signal chains. IC Role / Device Role / Timing Role: MCP4331-503E/ML forms dual potentiometers creating symmetrical VPOS/2 and VNEG/2 references from split supplies. Use Value: Quad architecture allows independent trimming of both positive and negative bias networks; 12.5 V input tolerance accommodates direct connection to ±12 V rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP4341-503E/ML | Nonvolatile EEPROM memory; WiperLock™ feature; POR sets wiper to last stored value (not mid-scale) | Required where power-loss retention of calibration settings is mandatory (e.g., medical devices) | Select MCP4341-503E/ML if calibration persistence across power cycles is critical; note higher write latency (~5 ms) vs. volatile update. |
| MCP4351-503E/ML | 8-bit resolution (257 taps); same 50 kΩ RAB and QFN-20 package; identical SPI interface and tempco | Needed when finer gain/offset resolution (<0.4%) is required without changing board layout | Select MCP4351-503E/ML if 0.4% step resolution improves system accuracy beyond 0.78% - no PCB change needed. |
Compared with MCP4341-503E/ML, the MCP4331-503E/ML offers faster wiper updates and lower cost but lacks nonvolatile storage; compared with MCP4351-503E/ML, it trades resolution for reduced code complexity and marginally lower power in SPI-active mode.
Availability
MCP4331-503E/ML is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, programmable gain amplifier calibration, and multi-channel ADC reference trimming requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MCP4331-503E/ML 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, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The MCP43xx family delivers quad digital potentiometers optimized for precision analog trimming in harsh industrial and automotive environments, emphasizing robust SPI communication, wide voltage operation, and thermal stability.
FAQ
What is the RAB resistance tolerance and temperature coefficient of the MCP4331-503E/ML?
The MCP4331-503E/ML has an RAB resistance of 50 kΩ with a tolerance of ±20% at 25°C. Its absolute temperature coefficient is 50 ppm/°C over 0°C to 70°C (rheostat mode), and its ratiometric tempco is 15 ppm/°C (potentiometer mode, mid-scale). These values ensure predictable drift in gain-setting and bias applications across industrial temperature ranges.
Does the MCP4331-503E/ML support both potentiometer and rheostat configurations?
Yes, the MCP4331-503E/ML supports both configurations. Each of its four resistor networks can operate as a three-terminal potentiometer (PxA–PxW–PxB) or a two-terminal rheostat by floating either terminal A or B. This flexibility enables use in voltage dividers, current-limiting circuits, and adjustable feedback networks without external components.
What is the maximum SPI clock frequency supported by the MCP4331-503E/ML?
The MCP4331-503E/ML supports SPI clock frequencies up to 10 MHz when VDD is 2.7 V or higher. At 1.8 V ≤ VDD < 2.7 V, the maximum SCK frequency is 1 MHz. This high-speed interface allows wiper register writes in under 10 µs, making the MCP4331-503E/ML suitable for dynamic real-time calibration loops.
How does the RESET pin function on the MCP4331-503E/ML?
The RESET pin on the MCP4331-503E/ML is an asynchronous active-low input that forces all four wiper positions to their power-on reset value (0x40 for 7-bit mode) and clears the TCON registers. A minimum 50 ns pulse width is required, and the device includes internal brown-out reset (1.5 V typical) to prevent spurious resets during supply ramp-up.
Is the MCP4331-503E/ML compatible with 12 V digital control signals?
Yes, the MCP4331-503E/ML features high-voltage tolerant digital inputs (CS, SCK, SDI, SDO, RESET) rated to 12.5 V, allowing direct connection to 12 V PLC outputs or automotive control lines without external level-shifting circuitry. This simplifies system integration in mixed-voltage industrial environments.
MCP4331-503E/ML Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 4
- Number of Taps:
- 129
- Resistance (Ohms):
- 50k
- Interface:
- SPI
- Memory Type:
- Volatile
- Voltage - Supply:
- 1.8V ~ 5.5V
- Features:
- -
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- 150ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-QFN (4x4)
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 75
MCP4331-503E/ML FAQ
1.How can I place an order for MCP4331-503E/ML through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP4331-503E/ML 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 MCP4331-503E/ML reliable?
The price and inventory of MCP4331-503E/ML are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP4331-503E/ML is usually 5 days.
3.What payment methods are accepted for MCP4331-503E/ML?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP4331-503E/ML transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP4331-503E/ML?
MCP4331-503E/ML orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP4331-503E/ML 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 MCP4331-503E/ML?
For technical support, including MCP4331-503E/ML datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP4331-503E/ML requirements.
6.How does Aetrix verify that MCP4331-503E/ML is sourced from the original manufacturer or authorized distributors?
All MCP4331-503E/ML 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 MCP4331-503E/ML meets industry standards.
7.What is the process for return or replacement of MCP4331-503E/ML?
All MCP4331-503E/ML units undergo pre-shipment inspection (PSI). If there is an issue with MCP4331-503E/ML, 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 MCP4331-503E/ML part is unused and in its original packaging.
Return procedure for MCP4331-503E/ML:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP4331-503E/ML Tags
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