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Microchip Technology MCP33121-10T-E/MS
- Part No.:
- MCP33121-10T-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP33121-10T-E/MS.pdf
- Description:
- IC ADC 14BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,668
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Product details
Overview
MCP33121-10T-E/MS from Microchip Technology is a 14-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 1.7V–5.5V digital I/O (DVIO), and accepts 2.5V–5.1V external reference (VREF), enabling high-precision data acquisition in battery-powered automotive and industrial sensor interfaces.
For engineers reviewing the MCP33121-10T-E/MS datasheet, MCP33121-10T-E/MS pinout, MCP33121-10T-E/MS application, or MCP33121-10T-E/MS equivalent, this page delivers verified specifications including INL (±0.55 LSB), SNR (83.5 dBFS at 10 kHz), SFDR (98.8 dBc), SPI clock support up to 100 MHz, and MSOP-10 package compatibility - all confirmed for the exact part number.
Technical Context
The MCP33121-10T-E/MS implements a successive approximation register (SAR) architecture with internal clock generation, decoupling conversion timing from SPI clock rate. Its input acquisition time is 250–300 ns and conversion time is 700–750 ns, achieving full 1 Msps throughput with no output latency.
It features on-demand self-calibration for offset, gain, and linearity errors, triggered via SPI command, and maintains stable performance across temperature due to integrated thermal compensation. The device uses pseudo-differential input structure configured for true single-ended operation with 0V to +VREF full-scale range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes - guarantees monotonicity and deterministic code transitions for control-loop feedback. |
| Sample Rate | 1 Msps - supports real-time sampling of signals up to ~400 kHz (Nyquist-limited) without aliasing in motor control or power supply monitoring. |
| INL / DNL | ±0.55 LSB / ±0.25 LSB - enables <1 LSB error over full scale, critical for high-fidelity sensor digitization and closed-loop accuracy. |
| SNR / SFDR | 83.5 dBFS / 98.8 dBc at fIN = 10 kHz, VREF = 5.1V - provides >13.5 ENOB, suitable for precision medical instrumentation and test equipment. |
| Supply Voltages | AVDD = 1.8V, DVIO = 1.7–5.5V, VREF = 2.5–5.1V - allows direct interfacing with low-voltage MCUs (e.g., PIC32MZ) without level shifters. |
| Power Consumption | 1.4 mA during conversion, 0.8 µA in standby - extends battery life in portable diagnostic devices and remote BMS nodes. |
| Temperature Range | -40°C to +125°C (AEC-Q100 Grade 1) - qualified for under-hood automotive applications and industrial edge controllers. |
Pinout & Package
Package: 10-pin MSOP (3.0 mm × 4.9 mm, 0.5 mm pitch), RoHS-compliant, Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: AIN+ | Analog Input (+) | Single-ended analog input node; referenced to GND, accepts 0V to +VREF; high-impedance (>1 GΩ) with 31 pF sampling capacitance. |
| 2: AVDD | Analog Supply | 1.8V analog power rail; requires 1 µF ceramic decoupling; powers internal reference buffer and SAR core. |
| 3: AIN− | Analog Input (−) | Internally connected to GND in single-ended mode; must be tied to GND externally per datasheet layout guidance. |
| 4: SDI | SPI Data Input | Command/data input for recalibration and configuration; CMOS-compatible, supports DVIO down to 1.7V. |
| 5: SCLK | SPI Clock Input | Accepts up to 100 MHz clock; timing-critical for data capture; low/high times ≥4.5 ns at DVIO ≥1.7V. |
| 6: GND | Analog/Digital Ground | Common ground reference for AVDD, DVIO, and analog inputs; requires low-inductance PCB connection. |
| 7: SDO | SPI Data Output | Tri-state output presenting 14-bit conversion result MSB-first; valid within 9.5 ns of SCLK low edge (DVIO ≥3.3V). |
| 8: DVIO | Digital I/O Supply | Supplies voltage for SDI, SCLK, SDO, and CNVST logic levels; independent of AVDD, enabling mixed-voltage system integration. |
| 9: VREF | External Reference Input | High-accuracy 2.5–5.1V reference source; supplies 360 µA max during conversion; requires 10 µF tantalum decoupling. |
| 10: CNVST | Convert Start Input | Edge-triggered command (rising edge) initiating sample-and-hold and conversion; also serves as chip select in 3-wire SPI mode. |
Key Features
| Feature | Design Value |
|---|---|
| No latency output | Conversion result available immediately after CNVST falling edge - eliminates pipeline delay for time-critical control loops. |
| On-demand self-calibration | Full offset/gain/linearity recalibration initiated via SPI command in ≤650 ms - restores accuracy after reference voltage drift or thermal transients. |
| Wide DVIO range (1.7–5.5V) | Direct interface with 1.8V, 3.3V, and 5V host MCUs (e.g., PIC32, ARM Cortex-M) without external level-shifting circuitry. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use across -40°C to +125°C ambient - meets reliability requirements for battery management and ADAS sensor front-ends. |
| Ultra-low standby current (0.8 µA) | Enables microamp-level system sleep modes in portable medical monitors and wireless sensor nodes without sacrificing wake-up responsiveness. |
Applications
| Motor Control Feedback | Battery Management Systems |
|---|---|
|
Use Scenario: Real-time phase current sensing in BLDC motor drives using shunt resistors. IC Role / Device Role / Timing Role: High-speed, low-latency ADC capturing current waveforms at 1 Msps for field-oriented control (FOC) algorithms. Use Value: ±0.55 LSB INL ensures <0.01% full-scale error in torque calculation; 1.8V AVDD minimizes power loss in compact inverter modules. |
Use Scenario: Cell voltage monitoring in electric vehicle battery packs with 100+ series-connected Li-ion cells. IC Role / Device Role / Timing Role: Precision single-ended ADC digitizing cell voltages with 14-bit resolution and AEC-Q100 reliability. Use Value: 83.5 dBFS SNR enables accurate state-of-charge estimation; -40°C to +125°C operation supports under-hood pack monitoring. |
| Medical Diagnostic Equipment | Industrial Test & Measurement |
|
Use Scenario: Analog front-end for portable ECG or EEG signal acquisition requiring low noise and DC stability. IC Role / Device Role / Timing Role: Low-power, high-linearity ADC converting amplified biopotential signals with minimal added distortion. Use Value: 98.8 dBc SFDR suppresses harmonic artifacts in spectral analysis; 0.8 µA standby current extends handheld device runtime. |
Use Scenario: Digitization stage in benchtop multimeters and automated test equipment requiring calibrated accuracy. IC Role / Device Role / Timing Role: High-throughput ADC providing traceable measurements with self-calibration capability for metrology-grade results. Use Value: On-demand recalibration compensates for long-term drift; ±0.25 LSB DNL ensures consistent step response across full 16,384-code range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8864IDRCT | 16-bit, 1 Msps, SPI interface, but requires 2.7–3.6V AVDD and 1.65–3.6V DVIO - narrower supply flexibility than MCP33121-10T-E/MS. | Targeted at high-precision lab equipment; lacks AEC-Q100 qualification and automotive temperature range. | Choose when 16-bit resolution is mandatory and automotive qualification is not required. |
| AD7940BRMZ | 14-bit, 100 kSPS (not 1 Msps), pseudo-differential input only - significantly lower throughput and different input topology. | Designed for low-power, low-speed industrial sensors; unsuitable for motor control or BMS sampling rates. | Choose only for cost-sensitive, low-bandwidth applications where 1 Msps is unnecessary. |
Compared with ADS8864IDRCT and AD7940BRMZ, the MCP33121-10T-E/MS uniquely combines 14-bit/1 Msps performance, 1.8V AVDD, wide DVIO (1.7–5.5V), AEC-Q100 Grade 1 rating, and on-demand calibration - making it optimal for automotive and portable high-speed sensing where supply flexibility and reliability are critical.
Availability
MCP33121-10T-E/MS is available at Aetrix Electronics and suitable for electric vehicle battery management systems, industrial motor control drives, and portable medical instrumentation requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MCP33121-10T-E/MS 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, and Flash-IP solutions, serving automotive, industrial, and consumer markets with vertically integrated silicon and software tools.
The MCP331xx family is designed for high-accuracy, low-power, single-channel data acquisition in space-constrained and thermally demanding environments - emphasizing simplicity, robustness, and seamless MCU integration.
FAQ
What is the maximum SPI clock frequency supported by the MCP33121-10T-E/MS?
The MCP33121-10T-E/MS supports an SPI clock (SCLK) frequency up to 100 MHz, with timing validated for tSCLK ≥10 ns (100 MHz) at DVIO ≥3.3V. At lower DVIO voltages (≥1.7V), the maximum SCLK is 62.5 MHz (tSCLK ≥16 ns). This high-speed interface enables rapid data transfer in real-time control applications using the MCP33121-10T-E/MS.
Does the MCP33121-10T-E/MS require an external reference voltage?
Yes, the MCP33121-10T-E/MS requires an external reference voltage applied to the VREF pin, specified from 2.5V to 5.1V. It does not include an internal reference. The selected VREF directly sets the full-scale input range (0V to +VREF), and the device draws up to 450 µA from VREF during conversion - necessitating proper decoupling (10 µF tantalum) as specified in the MCP33121-10T-E/MS datasheet.
How does the self-calibration function work in the MCP33121-10T-E/MS?
The MCP33121-10T-E/MS performs automatic self-calibration at power-up and supports on-demand recalibration via SPI command. The recalibrate command requires 1024 SCLK cycles and completes in ≤650 ms. It corrects offset, gain, and integral linearity errors - essential after environmental shifts (e.g., reference voltage settling or thermal drift) to maintain accuracy throughout the MCP33121-10T-E/MS operational lifetime.
Is the MCP33121-10T-E/MS pin-compatible with other members of the MCP331xx family?
Yes, the MCP33121-10T-E/MS shares identical pinout and package (MSOP-10) with MCP33131-10T-E/MS and MCP33111-10T-E/MS. All variants use the same footprint, power sequencing, and SPI interface timing - enabling hardware reuse across 12-, 14-, and 16-bit versions while maintaining design flexibility for resolution scaling in the MCP33121-10T-E/MS-based system.
What is the input full-scale range of the MCP33121-10T-E/MS?
The MCP33121-10T-E/MS has a single-ended input full-scale range of 0V to +VREF, where VREF is externally supplied between 2.5V and 5.1V. For example, with VREF = 5.0V, the input accepts 0–5.0V; with VREF = 2.5V, it accepts 0–2.5V. The analog input pins (AIN+, AIN−) tolerate –0.1V to VREF+0.1V, and leakage current remains ±2 nA during acquisition - critical for high-impedance sensor interfacing in the MCP33121-10T-E/MS application.
MCP33121-10T-E/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- 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-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
MCP33121-10T-E/MS FAQ
1.How can I place an order for MCP33121-10T-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP33121-10T-E/MS 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 MCP33121-10T-E/MS reliable?
The price and inventory of MCP33121-10T-E/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP33121-10T-E/MS is usually 5 days.
3.What payment methods are accepted for MCP33121-10T-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP33121-10T-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP33121-10T-E/MS?
MCP33121-10T-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP33121-10T-E/MS 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 MCP33121-10T-E/MS?
For technical support, including MCP33121-10T-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP33121-10T-E/MS requirements.
6.How does Aetrix verify that MCP33121-10T-E/MS is sourced from the original manufacturer or authorized distributors?
All MCP33121-10T-E/MS 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 MCP33121-10T-E/MS meets industry standards.
7.What is the process for return or replacement of MCP33121-10T-E/MS?
All MCP33121-10T-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with MCP33121-10T-E/MS, 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 MCP33121-10T-E/MS part is unused and in its original packaging.
Return procedure for MCP33121-10T-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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