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Microchip Technology MCP41HV51-103E/ST
- Part No.:
- MCP41HV51-103E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Digital Potentiometers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MCP41HV51-103E/ST.pdf
- Description:
- IC DGT POT 10KOHM 256TAP 14TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP41HV51-103E/ST from Microchip Technology is a single-channel, 8-bit volatile digital potentiometer with ±18V analog terminal voltage range (DGND = V− + 18V), 10 kΩ nominal RAB resistance, SPI interface (10 MHz, modes 0,0 and 1,1), and extended temperature operation from −40°C to +125°C. It supports high-voltage analog signal conditioning in industrial power supplies and motor control feedback loops.
For engineers reviewing the MCP41HV51-103E/ST datasheet, MCP41HV51-103E/ST pinout, MCP41HV51-103E/ST application, or MCP41HV51-103E/ST equivalent, key selection criteria include its 10 kΩ wiper current rating (12.5 mA), low 75 Ω typical wiper resistance, 15 ppm/°C ratiometric tempco, shutdown/TCON-controlled terminal disconnect, and Write Latch (WLAT) support for zero-crossing updates.
Technical Context
The MCP41HV51-103E/ST implements a single 256-tap resistor network with potentiometer configuration, using analog switches controlled by an SPI-driven volatile wiper register. Its dual-rail architecture separates digital logic (VL/DGND: 1.8–5.5 V) from high-voltage analog terminals (V+/V−: up to ±18 V relative to DGND), enabling safe operation in bipolar signal paths.
Power-on reset and brown-out detection operate independently on both rails: digital POR triggers at ~1.5 V on VL/DGND; analog POR activates at ~3.5 V on V+/V−. The WLAT pin gates wiper register updates, allowing synchronous adjustment only when external conditions (e.g., zero crossing) are met - critical for noise-sensitive analog control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RAB Nominal | 10 kΩ ±20% - defines full-scale resistance between terminals A and B; sets current-handling capability (12.5 mA max continuous) |
| Resolution | 8-bit (256 taps) - enables 0.39% step resolution for precise gain/offset trimming in closed-loop systems |
| Analog Voltage Range | +36 V terminal-to-terminal (V+ to V−), ±18 V relative to DGND - supports bipolar op-amp biasing and HV sensor interfaces |
| SPI Interface Speed | 10 MHz max - allows rapid wiper updates (<1 µs settling for 10 kΩ) in real-time control applications |
| Wiper Resistance | 75 Ω typical - minimizes insertion error in precision voltage divider configurations |
| Ratiometric Tempco | 15 ppm/°C - ensures stable voltage division ratio over −40°C to +125°C, critical for temperature-invariant references |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial PLC, and aerospace power management |
Pinout & Package
TSSOP-14 package with exposed pad (EP) for thermal dissipation; pin-compatible with MCP41HV31 series but optimized for 8-bit resolution and higher RAB options.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V− | Analog negative supply | Reference for analog terminal voltages; must be ≤ DGND and ≥ −36 V + VL; sets lower bound of ±18 V analog range |
| P0B | Resistor network terminal B | Fixed end of potentiometer; floating to enable rheostat mode; rated for ±12.5 mA continuous current |
| DGND | Digital ground | Logic reference for SPI and control pins; may be offset from V− (e.g., DGND = V− + 18 V) to enable ±18 V operation |
| P0W | Wiper output | Variable tap point; 75 Ω typical resistance; supports 12.5 mA max current; connected via internal analog switch matrix |
| V+ | Analog positive supply | Upper analog rail; must be ≤ DGND + 40 V and ≥ V− + 10 V for specified performance |
| P0A | Resistor network terminal A | Fixed end of potentiometer; symmetric with P0B; same current/voltage ratings and floating capability |
| SCK | SPI clock input | Edge-triggered serial clock; supports modes 0,0 and 1,1; Schmitt-triggered for noise immunity |
| VL | Digital supply voltage | Logic rail (1.8–5.5 V); powers SPI interface and control logic; POR threshold ~1.5 V |
| SHDN | Active-low shutdown | Disconnects all resistor terminals (A/W/B) from internal network; reduces leakage and power consumption |
| WLAT | Write latch enable | Holds incoming SPI data until asserted low; enables synchronized wiper update (e.g., at AC zero crossing) |
| CS | SPI chip select | Active-low enable for serial communication; required to initiate SPI transaction |
| SDO | SPI data output | Serial data output (MISO); open-drain compatible; VOL ≤ 0.2 VL at 5 mA sink |
| SDI | SPI data input | Serial data input (MOSI); Schmitt-triggered; VIH ≥ 0.45 VL, VIL ≤ 0.2 VL |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage analog terminals | ±18 V operation relative to DGND enables direct interfacing with ±15 V op-amps and HV sensor outputs without level-shifting |
| Volatile wiper memory with WLAT | Write Latch pin allows deterministic timing of wiper updates - essential for glitch-free adjustment in motor phase control |
| Terminal disconnect via SHDN/TCON | Hardware (SHDN) and register-based (TCON) isolation prevents loading of external circuits during sleep or fault states |
| Low 75 Ω wiper resistance | Minimizes voltage error in precision voltage dividers and maintains linearity across full 256-step range |
| 15 ppm/°C ratiometric tempco | Preserves voltage division ratio stability over temperature - critical for calibration-critical instrumentation front-ends |
Applications
| Industrial Motor Control | Programmable Power Supply |
|---|---|
Use Scenario: Adjusting feedback gain in three-phase inverter gate driver bias networks to maintain consistent switching thresholds across temperature. IC Role / Device Role / Timing Role: Digitally programmable gain-setting element in op-amp feedback path; updated synchronously via WLAT at zero-crossing to avoid transients. Use Value: Eliminates manual trimmer replacement; enables field calibration and adaptive tuning without hardware change. | Use Scenario: Setting output voltage reference in a 0–30 V, 5 A lab-grade DC power supply with remote sense compensation. IC Role / Device Role / Timing Role: Precision voltage divider in DAC-output buffer stage; RAB = 10 kΩ matches impedance requirements while supporting ±18 V common-mode range. Use Value: Maintains 0.39% step resolution and <15 ppm/°C ratio stability over full operating temperature, ensuring ±0.1% output accuracy. |
| Automotive Battery Management | Test & Measurement Equipment |
Use Scenario: Calibrating cell voltage measurement offsets in a 12S Li-ion battery pack monitor operating at −40°C to +105°C ambient. IC Role / Device Role / Timing Role: Offset nulling potentiometer in differential amplifier front-end; leverages extended temperature rating and low tempco. Use Value: Replaces mechanical potentiometers prone to drift and vibration failure; supports automated factory calibration via SPI. | Use Scenario: Programmable attenuation in a 100 MHz bandwidth RF signal generator output stage requiring <0.5% INL and fast settling. IC Role / Device Role / Timing Role: High-bandwidth (480 kHz −3 dB) rheostat-mode attenuator; uses P0A–P0W connection with P0B floating. Use Value: Achieves sub-microsecond settling (1 µs) and 0.25 LSB DNL - meets Class I signal integrity requirements for calibration-grade instruments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP41HV51-103E/MQ | VQFN-20 (5×5 mm) package vs. TSSOP-14; identical electrical specs and pinout mapping; higher thermal dissipation (2800 mW vs. 1000 mW) | Better suited for high-power density PCBs with thermal constraints; requires different land pattern and reflow profile | Select for space-constrained or thermally demanding layouts where enhanced heat spreading is required. |
| MCP41HV31-103E/ST | 7-bit (128-tap) resolution vs. 8-bit; same RAB, voltage ratings, and package; POR wiper default = 0x3F vs. 0x7F | Lower resolution acceptable for coarse gain control; reduced code space simplifies firmware handling | Choose when 0.78% step size suffices and cost optimization is prioritized over fine-grained adjustment. |
Compared with MCP41HV51-103E/MQ, the /ST variant offers smaller footprint and lower assembly cost but reduced thermal headroom; versus MCP41HV31-103E/ST, it delivers twice the resolution and mid-scale POR default - critical for applications requiring precise startup conditions and fine analog tuning.
Availability
MCP41HV51-103E/ST is available at Aetrix Electronics and suitable for industrial motor control, programmable power supplies, and automotive battery management systems requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for MCP41HV51-103E/ST 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, serving industrial, automotive, communications, and consumer markets with high-reliability semiconductor products.
The MCP41HVX1 product line delivers high-voltage digital potentiometers designed for precision analog control in harsh environments - specifically targeting applications needing ±18 V operation, extended temperature range, and SPI configurability without external level shifters.
FAQ
What is the maximum analog terminal voltage range supported by the MCP41HV51-103E/ST?
The MCP41HV51-103E/ST supports a +36 V terminal-to-terminal voltage range (V+ to V−) and ±18 V relative to DGND when DGND = V− + 18 V. This enables direct use in bipolar analog circuits such as ±15 V op-amp stages and HV sensor interfaces without external level translation. Absolute maximum ratings limit V+ to DGND + 40 V and V− to DGND − 40 V.
How does the Write Latch (WLAT) function improve system reliability in the MCP41HV51-103E/ST?
The WLAT pin in the MCP41HV51-103E/ST holds incoming SPI data in a buffer until WLAT is driven low, enabling deterministic wiper updates synchronized to external events like AC zero crossing or PWM dead time. This prevents transient glitches during gain/offset changes in motor control or power supply feedback loops - a feature not present in basic digital pots and critical for EMI-sensitive applications.
Can the MCP41HV51-103E/ST be used in rheostat configuration, and what are the current limits?
Yes, the MCP41HV51-103E/ST supports rheostat mode by floating either P0A or P0B terminal. For the 10 kΩ variant, maximum continuous wiper current is 12.5 mA (±12.5 mA), with pulsed current scaling inversely with duty cycle. This allows direct use as a programmable load or current-limiting element in HV power stage bias networks.
What is the typical wiper resistance and temperature coefficient of the MCP41HV51-103E/ST, and why do they matter?
The MCP41HV51-103E/ST has a typical wiper resistance of 75 Ω and a ratiometric temperature coefficient of 15 ppm/°C. Low RW minimizes insertion error in voltage divider applications, while tight ratiometric tempco ensures stable division ratio over −40°C to +125°C - essential for calibration-critical instrumentation and automotive sensor conditioning where absolute resistance drift is less important than ratio stability.
Does the MCP41HV51-103E/ST support independent power-up sequencing of analog and digital supplies?
Yes, the MCP41HV51-103E/ST features independent POR/BOR circuits for analog (V+/V−) and digital (VL/DGND) rails. Digital POR triggers at ~1.5 V on VL/DGND; analog POR activates at ~3.5 V on V+/V−. The datasheet specifies sequencing guidelines - e.g., VL must rise before V+ to ensure proper initialization - making it suitable for systems with staggered power domains like isolated DC-DC converters.
MCP41HV51-103E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 256
- Resistance (Ohms):
- 10k
- Interface:
- SPI
- Memory Type:
- Volatile
- Voltage - Supply:
- 1.8V ~ 5.5V, 10V ~ 36V, ±5V ~ 18V
- Features:
- -
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- 100ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-TSSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 145
MCP41HV51-103E/ST FAQ
1.How can I place an order for MCP41HV51-103E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP41HV51-103E/ST 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 MCP41HV51-103E/ST reliable?
The price and inventory of MCP41HV51-103E/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP41HV51-103E/ST is usually 5 days.
3.What payment methods are accepted for MCP41HV51-103E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP41HV51-103E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP41HV51-103E/ST?
MCP41HV51-103E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP41HV51-103E/ST 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 MCP41HV51-103E/ST?
For technical support, including MCP41HV51-103E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP41HV51-103E/ST requirements.
6.How does Aetrix verify that MCP41HV51-103E/ST is sourced from the original manufacturer or authorized distributors?
All MCP41HV51-103E/ST 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 MCP41HV51-103E/ST meets industry standards.
7.What is the process for return or replacement of MCP41HV51-103E/ST?
All MCP41HV51-103E/ST units undergo pre-shipment inspection (PSI). If there is an issue with MCP41HV51-103E/ST, 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 MCP41HV51-103E/ST part is unused and in its original packaging.
Return procedure for MCP41HV51-103E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP41HV51-103E/ST Tags
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