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Microchip Technology MCP33121D-05T-E/MS
- Part No.:
- MCP33121D-05T-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP33121D-05T-E/MS.pdf
- Description:
- IC ADC 14BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP33121D-05T-E/MS from Microchip Technology is a 14-bit, 500 kSPS fully differential successive approximation register (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) for ±VREF differential input range - ideal for high-accuracy battery management and motor control systems.
For engineers reviewing the MCP33121D-05T-E/MS datasheet, MCP33121D-05T-E/MS pinout, MCP33121D-05T-E/MS application, or MCP33121D-05T-E/MS equivalent, key selection criteria include its 14-bit resolution with ±0.5 LSB INL, SPI-compatible 3-wire interface up to 100 MHz SCLK, self-calibration capability, and MSOP-10/TDFN-10 packaging for space-constrained automotive and industrial designs.
Technical Context
The MCP33121D-05T-E/MS implements a SAR architecture with internal clock generation, decoupling conversion timing from SPI clock rate. Its differential input stage supports full-scale ranges from ±2.5V to ±5.1V, and it features automatic power-up calibration plus on-demand recalibration to maintain offset, gain, and linearity accuracy across temperature and VREF drift.
Conversion is triggered by the CNVST pin rising edge; output data appears on SDO during Standby mode after conversion completes. The device consumes only ~1.4 mA during conversion and <1 µA in Standby, enabling low-power continuous acquisition in battery-powered applications without latency or pipeline delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes - guarantees monotonicity and deterministic code transitions for closed-loop control. |
| Sample Rate | 500 kSPS throughput - supports real-time sampling of motor phase currents or battery cell voltages at ≤2 µs intervals. |
| Differential Input Range | ±VREF (2.5V–5.1V) - enables direct connection to precision shunt amplifiers or isolated signal chains without level-shifting. |
| INL / DNL | ±0.5 LSB / ±0.25 LSB typical - ensures <0.003% integral error for 14-bit accuracy in measurement-critical systems. |
| Supply Voltages | AVDD = 1.8V, DVIO = 1.7V–5.5V, VREF = 2.5V–5.1V - allows interoperability with 1.8V/3.3V/5V host MCUs without level shifters. |
| Self-Calibration | Automatic on power-up + user-triggered recalibration - corrects offset/gain/linearity errors without external calibration hardware. |
| Temperature Range | AEC-Q100 Grade 1: -40°C to +125°C - qualified for under-hood automotive and industrial power electronics environments. |
Pinout & Package
Package: MSOP-10 (3 mm × 3 mm, 0.5 mm pitch) and TDFN-10 (3 mm × 3 mm, 0.5 mm pitch); both RoHS-compliant, Pb-free, and thermally optimized (θJA = 202°C/W for MSOP, 68°C/W for TDFN).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+ | Differential analog input positive | Accepts voltage up to VREF+0.1V; paired with AIN- for true differential measurement rejecting common-mode noise. |
| AIN- | Differential analog input negative | Completes differential pair; common-mode voltage must stay within 0V to VREF per datasheet specification. |
| AVDD | Analog supply | 1.8V regulated supply for internal analog circuitry; requires 1 µF ceramic decoupling capacitor. |
| DVIO | Digital I/O supply | Configures logic levels for SDI/SDO/SCLK/CNVST; independent of AVDD, enabling mixed-voltage system interfacing. |
| VREF | External reference input | Defines full-scale range (±VREF); requires 10 µF tantalum decoupling; supports 2.5V–5.1V for flexible dynamic range scaling. |
| SDI | SPI data input | Accepts command bits (e.g., recalibrate); Schmitt-triggered for noise immunity; VIH/VIL thresholds scale with DVIO. |
| SCLK | SPI serial clock | Up to 100 MHz operation; timing parameters (tSCLK_L/H, tDO) specified per DVIO voltage to ensure reliable data capture. |
| SDO | SPI data output | Tri-state output presenting 14-bit conversion result MSB-first; output enable/disable times defined for clean bus sharing. |
| CNVST | Convert start / chip select | Rising edge initiates conversion; falling edge releases SDO data; also serves as hardware CS in multi-device SPI configurations. |
| GND | Analog/digital ground | Single ground plane required; layout best practice separates analog and digital return paths near the device. |
Key Features
| Feature | Design Value |
|---|---|
| No latency output | Conversion result available immediately after completion - eliminates pipeline delay critical for real-time feedback loops. |
| Ultra-low standby current | ~0.8 µA typical - enables microamp-level system sleep modes while retaining fast wake-and-convert response. |
| Wide DVIO range (1.7V–5.5V) | Direct interface with PIC32, ARM Cortex-M, and legacy 5V MCUs without level-shifting circuitry or additional components. |
| On-demand self-calibration | User-initiated recalibration via SPI command restores optimal INL/DNL performance after environmental shifts (e.g., VREF settling changes). |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including battery monitoring, inverter control, and ADAS sensor front-ends. |
| Differential input with 84 dB CMRR | Rejects common-mode noise from switching power supplies or motor drives - improves effective resolution in noisy ECU environments. |
Applications
| Electric Vehicle Battery Management | Industrial Motor Control |
|---|---|
|
Use Scenario: Monitoring individual Li-ion cell voltages and pack current in real time under high EMI conditions. IC Role / Device Role / Timing Role: High-precision differential ADC capturing synchronized voltage/current samples at 500 kSPS for state-of-charge and thermal runaway detection. Use Value: ±0.5 LSB INL and 85.1 dB SNR ensure sub-1mV measurement accuracy over -40°C to +125°C, meeting ISO 26262 ASIL-B requirements. |
Use Scenario: Sampling phase currents and DC-link voltage in 3-phase inverter drives for field-oriented control (FOC). IC Role / Device Role / Timing Role: Differential SAR ADC providing isolated current sense inputs to MCU with deterministic 2 µs conversion interval and zero latency. Use Value: 14-bit resolution with no missing codes and 103.5 dB SFDR enables accurate torque ripple suppression and efficient PWM synchronization. |
| Medical Patient Monitoring | Switch-Mode Power Supply Telemetry |
|
Use Scenario: High-fidelity acquisition of biopotential signals (ECG, EEG) with low-noise front-end amplification. IC Role / Device Role / Timing Role: Precision ADC digitizing amplified differential bio-signals with minimal added noise and distortion. Use Value: 85.1 dB SNR and -99.2 dB THD preserve signal integrity for clinical-grade diagnostics; low 1.4 mA active current extends portable device battery life. |
Use Scenario: Real-time monitoring of output voltage, current, and temperature in digitally controlled AC/DC and DC/DC converters. IC Role / Device Role / Timing Role: High-speed ADC feeding telemetry data to digital controller for adaptive loop compensation and fault protection. Use Value: 500 kSPS throughput and ±0.25 LSB DNL support fast transient response detection; self-calibration maintains accuracy across wide temperature and load variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1 MSPS, SPI interface, but requires 2.7V–3.6V AVDD and lacks on-demand recalibration. | Higher resolution but narrower supply range and no recalibration - better suited for lab-grade test equipment than automotive BMS. | Select when 16-bit resolution is mandatory and recalibration is handled externally; avoid where DVIO > 3.6V or recalibration-on-the-fly is needed. |
| MCP33121D-10T-E/MS | Same 14-bit resolution and package, but rated for 1 MSPS sample rate and higher conversion current (~1.6 mA). | Designed for higher-throughput applications like broadband signal analysis; less optimal for ultra-low-power battery monitoring. | Choose for systems requiring >500 kSPS with identical feature set; not drop-in due to higher power and timing constraints. |
Compared with ADS8860IDRCT and MCP33121D-10T-E/MS, the MCP33121D-05T-E/MS uniquely balances 14-bit precision, 500 kSPS throughput, ultra-low standby current, and integrated recalibration - making it optimal for automotive and industrial systems demanding accuracy, robustness, and power efficiency simultaneously.
Availability
MCP33121D-05T-E/MS is available at Aetrix Electronics and suitable for electric vehicle battery management, industrial motor control, and medical patient monitoring systems requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for MCP33121D-05T-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 devices, and Flash-IP solutions, serving automotive, industrial, communications, and consumer markets with high-reliability silicon and development tools.
The MCP331xxD family was designed specifically for high-accuracy, low-power, automotive-qualified data acquisition in harsh environments - emphasizing differential input robustness, self-calibration, and extended temperature operation.
FAQ
What is the maximum SPI clock frequency supported by the MCP33121D-05T-E/MS?
The MCP33121D-05T-E/MS supports an SCLK frequency up to 100 MHz, with timing specifications guaranteed across DVIO voltages: 10 ns period at DVIO ≥ 3.3V, 12 ns at ≥ 2.3V, and 16 ns at ≥ 1.7V. This allows high-speed data readout without compromising timing margins in diverse host MCU environments.
Does the MCP33121D-05T-E/MS require an external reference voltage?
Yes, the MCP33121D-05T-E/MS requires an external reference voltage applied to the VREF pin, which sets the full-scale differential input range (±VREF). It supports 2.5V to 5.1V references and specifies 10 µF tantalum decoupling for stability - no internal reference is provided.
How does the self-calibration function work in the MCP33121D-05T-E/MS?
The MCP33121D-05T-E/MS performs automatic self-calibration on power-up to correct offset, gain, and linearity errors. Users can also trigger recalibration on-demand via SPI command (requiring 1024 SCLK cycles), which takes ~500–650 ms - restoring accuracy after environmental changes such as VREF drift or temperature excursions.
What is the input full-scale range for differential operation of the MCP33121D-05T-E/MS?
The MCP33121D-05T-E/MS supports a differential input full-scale range of ±VREF, where VREF is externally supplied between 2.5V and 5.1V. For example, with VREF = 5.0V, the valid input range is -5.0V to +5.0V differential, corresponding to a 10VPP span - enabling high dynamic range signal capture.
Is the MCP33121D-05T-E/MS pin-compatible with other members of the MCP331xxD family?
Yes, the MCP33121D-05T-E/MS shares identical pinout and package dimensions with all MCP331xxD-05 and MCP331xxD-10 variants in MSOP-10 and TDFN-10 packages. This enables design reuse across 12-/14-/16-bit resolutions and 500 kSPS/1 MSPS speeds without PCB layout changes.
MCP33121D-05T-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):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Differential
- 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
MCP33121D-05T-E/MS FAQ
1.How can I place an order for MCP33121D-05T-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP33121D-05T-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 MCP33121D-05T-E/MS reliable?
The price and inventory of MCP33121D-05T-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 MCP33121D-05T-E/MS is usually 5 days.
3.What payment methods are accepted for MCP33121D-05T-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP33121D-05T-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP33121D-05T-E/MS?
MCP33121D-05T-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP33121D-05T-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 MCP33121D-05T-E/MS?
For technical support, including MCP33121D-05T-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP33121D-05T-E/MS requirements.
6.How does Aetrix verify that MCP33121D-05T-E/MS is sourced from the original manufacturer or authorized distributors?
All MCP33121D-05T-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 MCP33121D-05T-E/MS meets industry standards.
7.What is the process for return or replacement of MCP33121D-05T-E/MS?
All MCP33121D-05T-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with MCP33121D-05T-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 MCP33121D-05T-E/MS part is unused and in its original packaging.
Return procedure for MCP33121D-05T-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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