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Microchip Technology MCP33131-10-E/MN
- Part No.:
- MCP33131-10-E/MN
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MCP33131-10-E/MN.pdf
- Description:
- IC ADC 16BIT SAR 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,028
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Product details
Overview
MCP33131-10-E/MN from Microchip Technology is a 16-bit, 1 Msps single-ended SAR analog-to-digital converter with no missing codes, ultra-low standby current (0.8 µA), and AEC-Q100 Grade 1 qualification (-40°C to +125°C). It operates from a 1.8V analog supply (AVDD), supports 2.5V–5.1V external reference (VREF), and delivers 86.7 dBFS SNR at 10 kHz input with 5V reference - ideal for high-precision battery management and motor control systems.
For engineers reviewing the MCP33131-10-E/MN datasheet, MCP33131-10-E/MN pinout, MCP33131-10-E/MN application, or MCP33131-10-E/MN equivalent, this page provides verified technical context, SPI interface timing constraints, self-calibration behavior, package-specific thermal resistance (68°C/W for TDFN-10), and real-world performance trade-offs between resolution, throughput, and power in automotive-grade data acquisition designs.
Technical Context
The MCP33131-10-E/MN implements a successive approximation register (SAR) architecture with internal clock generation independent of SCLK, enabling deterministic conversion time (710 ns max) and no output latency. Its CNVST-driven acquisition cycle initiates sampling on the rising edge and presents result data on SDO during Standby mode.
It features on-demand and automatic power-up self-calibration for offset, gain, and linearity errors, supporting stable operation across temperature and reference voltage drifts. The device uses a pseudo-differential input structure configured for true single-ended operation (0V to +VREF full-scale range) and requires no external level shifters due to its 1.7V–5.5V DVIO interface voltage range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage for precision measurement applications. |
| Sample Rate | 1 Msps throughput - enables real-time capture of signals up to ~400 kHz (Nyquist-limited) in high-speed control loops. |
| SNR @ 10 kHz | 86.7 dBFS (VREF = 5V) - translates to ~14.1 effective bits (ENOB), suitable for medical-grade signal fidelity. |
| INL / DNL | ±2.2 LSB / ±0.9 LSB typical - ensures accurate amplitude representation without code-width distortion in calibrated systems. |
| Supply Voltages | AVDD = 1.8V, DVIO = 1.7–5.5V, VREF = 2.5–5.1V - allows direct interfacing with 1.8V/3.3V/5V host MCUs and flexible reference scaling. |
| Standby Current | 0.8 µA typical - extends battery life in always-on sensing nodes without sacrificing wake-up responsiveness. |
| SPI Clock Rate | Up to 100 MHz SCLK - supports fast data readout with minimal bus occupancy, reducing host CPU overhead. |
Pinout & Package
Package: 10-pin TDFN (3 mm × 3 mm, 0.5 mm pitch) - low thermal resistance (θJA = 68°C/W), optimized for space-constrained automotive and industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: AIN+ | Analog Input (+) | Single-ended analog input node; referenced to GND, accepts 0V to +VREF full-scale range. |
| 2: AVDD | Analog Supply | 1.8V regulated analog rail; must be decoupled with 1 µF ceramic capacitor per datasheet recommendation. |
| 3: AIN− | Analog Input (−) | Internally tied to GND in single-ended mode; used only in pseudo-differential configuration. |
| 4: SDI | SPI Data Input | Accepts command bits (e.g., recalibrate); Schmitt-triggered for noise immunity on 1.7–5.5V DVIO rails. |
| 5: SCLK | SPI Clock Input | Supports up to 100 MHz; timing-critical for data capture - tSCLK_L/tSCLK_H min = 4.5 ns at DVIO ≥ 1.7V. |
| 6: GND | Analog/Digital Ground | Common reference for AVDD, DVIO, and analog inputs; requires low-impedance PCB connection. |
| 7: SDO | SPI Data Output | Tri-state output presenting 16-bit conversion result MSB-first; tDO ≤ 16 ns (DVIO ≥ 1.7V). |
| 8: DVIO | Digital I/O Supply | Defines logic thresholds for all digital pins; enables interoperability with mixed-voltage host systems. |
| 9: VREF | External Reference Input | High-impedance reference source (2.5–5.1V); requires 10 µF tantalum decoupling per datasheet. |
| 10: CNVST | Convert Start Input | Edge-triggered chip select; rising edge initiates acquisition, falling edge releases SDO data and re-enters Standby. |
Key Features
| Feature | Design Value |
|---|---|
| No latency output | Conversion result available immediately after tCNV completes; eliminates pipeline delay in closed-loop feedback. |
| On-demand self-calibration | Recalibration initiated via SPI command (1024 SCLK clocks); restores accuracy after reference voltage settling or thermal transients. |
| AEC-Q100 Grade 1 | Qualified for automotive use over -40°C to +125°C ambient; validated for reliability in engine control and BMS environments. |
| Ultra-low-power Standby | 0.8 µA typical current draw while acquiring next sample - enables multi-year battery operation in remote sensors. |
| Wide DVIO interface range | 1.7V–5.5V logic compatibility eliminates need for external level shifters when interfacing with PIC32, ARM Cortex-M, or legacy 5V MCUs. |
Applications
| Electric Vehicle Battery Management | Industrial Motor Control |
|---|---|
Use Scenario: Real-time cell voltage monitoring across 96-cell EV battery packs with thermal derating compensation. IC Role / Device Role / Timing Role: High-accuracy, low-drift ADC capturing 16-bit samples at 1 Msps to support state-of-charge (SoC) and state-of-health (SoH) algorithms. Use Value: ±2.2 LSB INL and 86.7 dBFS SNR ensure <±1 mV measurement error at 5V full-scale, critical for pack balancing decisions. |
Use Scenario: Phase current sensing in three-phase inverter drives for servo and traction motors. IC Role / Device Role / Timing Role: Single-ended ADC synchronized to PWM carrier edges via CNVST to capture current peaks with deterministic timing. Use Value: No-latency output and 710 ns max conversion enable sub-microsecond current loop response, improving torque ripple suppression. |
| Medical Patient Monitoring | High-Precision Test Equipment |
Use Scenario: ECG front-end digitization requiring baseline stability and low-noise amplification before ADC. IC Role / Device Role / Timing Role: Low-power, high-SNR ADC operating from 1.8V AVDD and 3.3V DVIO in portable diagnostic devices. Use Value: 0.8 µA standby current extends battery runtime; 86.7 dBFS SNR meets IEC 60601-2-27 requirements for clinical-grade signal fidelity. |
Use Scenario: Automated test equipment (ATE) channel digitizing DC/low-frequency analog signals with traceable calibration. IC Role / Device Role / Timing Role: Calibration-reference ADC leveraging on-chip self-calibration to maintain metrology-grade linearity over temperature. Use Value: ±2.2 LSB INL and auto-recalibration reduce annual calibration frequency, lowering total cost of ownership for production test systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1 Msps, SPI interface, but requires 2.7–3.6V AVDD and has higher standby current (2.5 µA). | Not AEC-Q100 qualified; rated only for -40°C to +85°C - unsuitable for under-hood automotive use. | Select when system already uses 3.3V analog rail and automotive qualification is unnecessary. |
| MCP33131D-10-E/MN | Same 16-bit/1 Msps spec, but includes integrated digital filter and enhanced SPI command set; identical pinout and package. | Offers optional oversampling and averaging modes - beneficial for noise-sensitive DC measurements but adds firmware complexity. | Choose for new designs needing improved effective resolution without external filtering; backward-compatible drop-in replacement. |
Compared with ADS8860IDRCT, the MCP33131-10-E/MN delivers automotive-grade reliability and lower power at the cost of narrower AVDD range; versus MCP33131D-10-E/MN, it trades advanced digital features for simpler firmware integration and identical hardware footprint.
Availability
MCP33131-10-E/MN is available at Aetrix Electronics and suitable for electric vehicle battery management systems, industrial motor control units, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MCP33131-10-E/MN 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 microcontrollers, analog components, and Flash-IP solutions, serving automotive, industrial, and communications markets with vertically integrated design and manufacturing.
The MCP331xx family was designed specifically for high-accuracy, low-power, automotive-qualified data acquisition - emphasizing robustness, self-calibration, and seamless MCU integration in safety-critical embedded systems.
FAQ
What is the maximum SPI clock frequency supported by the MCP33131-10-E/MN?
The MCP33131-10-E/MN supports an SCLK frequency up to 100 MHz, with minimum timing constraints dependent on DVIO voltage: tSCLK_L and tSCLK_H are 4.5 ns each at DVIO ≥ 1.7V. This allows rapid data readout of the 16-bit result within 160 ns, minimizing host processor overhead during high-throughput acquisition.
Does the MCP33131-10-E/MN require external calibration for production use?
No - the MCP33131-10-E/MN performs automatic self-calibration at power-up and supports on-demand recalibration via SPI command. This eliminates the need for external calibration fixtures in production, as offset, gain, and linearity errors are corrected internally with 500–650 ms calibration time.
Can the MCP33131-10-E/MN operate with a 2.5V reference voltage?
Yes - the MCP33131-10-E/MN accepts VREF from 2.5V to 5.1V. At 2.5V reference, SNR drops to 80.9 dBFS (vs. 86.7 dBFS at 5V), but full-scale input range becomes 0–2.5V, enabling higher resolution for low-voltage sensor outputs without signal conditioning.
What is the thermal resistance of the MCP33131-10-E/MN in its TDFN-10 package?
The MCP33131-10-E/MN in the TDFN-10 package has a junction-to-ambient thermal resistance (θJA) of 68°C/W, significantly lower than the MSOP-10 variant (202°C/W). This enables higher sustained conversion rates in thermally constrained enclosures without exceeding the +150°C absolute maximum junction temperature.
How does the CNVST pin function in the MCP33131-10-E/MN timing sequence?
In the MCP33131-10-E/MN, the CNVST pin serves as both conversion trigger and chip select: a rising edge initiates input acquisition (tACQ = 250–300 ns), and a falling edge releases the 16-bit result onto SDO and returns the device to low-current Standby mode - enabling precise synchronization with host-controlled sampling intervals.
MCP33131-10-E/MN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 10-TDFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
MCP33131-10-E/MN FAQ
1.How can I place an order for MCP33131-10-E/MN through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP33131-10-E/MN 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 MCP33131-10-E/MN reliable?
The price and inventory of MCP33131-10-E/MN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP33131-10-E/MN is usually 5 days.
3.What payment methods are accepted for MCP33131-10-E/MN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP33131-10-E/MN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP33131-10-E/MN?
MCP33131-10-E/MN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP33131-10-E/MN 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 MCP33131-10-E/MN?
For technical support, including MCP33131-10-E/MN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP33131-10-E/MN requirements.
6.How does Aetrix verify that MCP33131-10-E/MN is sourced from the original manufacturer or authorized distributors?
All MCP33131-10-E/MN 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 MCP33131-10-E/MN meets industry standards.
7.What is the process for return or replacement of MCP33131-10-E/MN?
All MCP33131-10-E/MN units undergo pre-shipment inspection (PSI). If there is an issue with MCP33131-10-E/MN, 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 MCP33131-10-E/MN part is unused and in its original packaging.
Return procedure for MCP33131-10-E/MN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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