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STMicroelectronics MP33AB01TR
- Part No.:
- MP33AB01TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microphones
- Package:
- Datasheet:
-
MP33AB01TR.pdf
- Description:
- MIC MEMS ANALOG OMNI -38DB
- Quantity:
- Payment:
- Shipping:
Inventory:2,402
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Product details
Overview
MP33AB01TR from STMicroelectronics is a bottom-port MEMS silicon microphone with analog output, designed for compact audio capture in space-constrained applications. It features omnidirectional sensitivity, 63 dB signal-to-noise ratio (SNR), 100 Hz–10 kHz frequency response, and operates from 1.5 V to 3.6 V supply at 0.25 mA typical current consumption. Used in voice-enabled IoT devices, wearables, and smart speakers requiring high-fidelity near-field acoustic sensing.
For engineers reviewing the MP33AB01TR datasheet, MP33AB01TR pinout, MP33AB01TR application, or MP33AB01TR equivalent, key selection criteria include its -41 dBV ±3 dB sensitivity at 1 kHz, 125 dBSPL acoustic overload point, extended -30 °C to +100 °C operating temperature range, and RHLGA 3.76 × 2.95 × 1.0 mm reflow-compatible package.
Technical Context
The MP33AB01TR integrates a silicon micromachined sensing element with on-chip ASIC for analog signal conditioning. Its electrical interface uses a single-ended analog output referenced to Vdd, with internal biasing eliminating external DC-blocking requirements at the sensor side - though an external DC-blocking capacitor (C1 > 1 µF) remains recommended at the output stage.
It delivers flat frequency response from 100 Hz to 10 kHz (±3 dB), supports low-distortion operation (<1% THD at 94 dBSPL), and maintains stable performance across industrial temperature extremes. The device is ESD-sensitive (HBM Class 2) and mechanically shock-sensitive, requiring handling per ST's ECOPACK® and JEDEC J-STD-020-compliant soldering guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 1.5 V to 3.6 V - compatible with common Li-ion, coin-cell, and 3.3 V logic rails without regulation |
| Current consumption | 0.25 mA typ. at 2.2 V - enables multi-year battery life in always-on voice wake-up systems |
| Sensitivity | -38 dBV typ. at 1 kHz (0 dB = 1 V/Pa) - provides robust signal level into standard audio ADC inputs |
| Signal-to-noise ratio | 63 dB - ensures clear voice capture in noisy ambient environments (e.g., portable speakers) |
| Frequency response | 100 Hz to 10 kHz (±3 dB) - covers full human speech band and supports wideband VoIP codecs |
| Acoustic overload point | 125 dBSPL - withstands loud transient sounds (e.g., claps, alarms) without clipping or damage |
| Operating temperature | -30 °C to +100 °C - qualified for under-hood automotive infotainment and industrial edge devices |
Pinout & Package
The MP33AB01TR is housed in a 6-pin RHLGA (Rounded Hybrid Land Grid Array) package measuring 3.76 × 2.95 × 1.0 mm, optimized for bottom-port acoustic coupling and automated reflow assembly. The package complies with RoHS, "Green" standards, and JEDEC J-STD-020 moisture sensitivity level (MSL) 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output | Analog output node - single-ended AC-coupled signal referenced to Vdd; requires external DC-blocking capacitor |
| 2, 3, 5, 6 | GND | Four dedicated ground terminals - reduce impedance path for RF/EMI rejection and improve SNR stability |
| 4 | Vdd | Power supply input - internally regulated; accepts 1.5–3.6 V with minimal external filtering needed |
Key Features
| Feature | Design Value |
|---|---|
| Omnidirectional acoustic response | Enables consistent pickup regardless of sound incidence angle - critical for hands-free voice UI in rotating or pocketed devices |
| High SNR (63 dB) | Reduces need for post-processing gain, lowering system noise floor and preserving dynamic range in low-power audio front-ends |
| Extended temperature range (-30 °C to +100 °C) | Supports deployment in automotive cabins, outdoor sensors, and industrial HMIs without thermal derating |
| Bottom-port configuration | Allows PCB-mount integration beneath apertures - simplifies mechanical design and improves dust/moisture sealing |
| Reflow-solderable RHLGA package | Enables high-yield SMT assembly with standard lead-free profiles; eliminates wire-bond reliability concerns |
Applications
| Voice-Controlled Smart Home Hub | Industrial Voice-Activated HMI |
|---|---|
|
Use Scenario: Continuous far-field voice detection in wall-mounted smart displays with ambient noise up to 65 dB(A). IC Role / Device Role / Timing Role: Primary analog audio transducer capturing speech for ASR preprocessing in low-latency edge AI pipelines. Use Value: 63 dB SNR and 125 dBSPL overload headroom prevent clipping during sudden vocal bursts while maintaining intelligibility at low SNR. |
Use Scenario: Operator voice command interface inside factory control panels exposed to vibration and temperature swings. IC Role / Device Role / Timing Role: Acoustic input sensor interfaced directly to a microcontroller's 12-bit SAR ADC with minimal external components. Use Value: -30 °C to +100 °C rating and robust mechanical construction ensure reliable operation where conventional electret mics fail. |
| Wearable Fitness Tracker | Automotive Cabin Microphone Array |
|
Use Scenario: Compact wrist-worn device requiring voice logging and coaching feedback in variable acoustic environments. IC Role / Device Role / Timing Role: Low-power analog microphone feeding a DSP-accelerated keyword spotting engine with <100 µA average system current. Use Value: 0.25 mA typical current draw extends battery life beyond 7 days between charges while sustaining full-bandwidth capture. |
Use Scenario: Multi-mic array embedded in A-pillar trim for hands-free telephony and voice assistant activation in passenger compartment. IC Role / Device Role / Timing Role: Bottom-port MEMS element mounted flush with interior surface to minimize wind noise and acoustic shadowing. Use Value: Omnidirectional pattern and 100 Hz–10 kHz bandwidth support beamforming algorithms for speaker localization and noise suppression. |
Availability
MP33AB01TR is available at Aetrix Electronics and suitable for voice-controlled smart home hubs, industrial voice-activated HMIs, and wearable fitness trackers requiring stable component supply across long-lifecycle production programs.
Supply support for MP33AB01TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering intelligent power, sensing, and connectivity solutions for industrial, automotive, and consumer markets.
The MP33AB01TR belongs to ST's MEMS audio portfolio, engineered specifically for high-SNR, low-power, and thermally robust analog microphone applications in resource-constrained edge devices.
FAQ
What is the recommended external DC-blocking capacitor value for MP33AB01TR?
A minimum 1 µF ceramic capacitor is recommended on the Output pin (Pin 1), paired with an input resistance ≥20 kΩ at the downstream amplifier or ADC to achieve a cutoff frequency below 20 Hz. This prevents DC offset accumulation and preserves low-frequency speech content without affecting voice intelligibility.
Does MP33AB01TR require an external bias resistor or voltage reference?
No. The MP33AB01TR integrates an internal bias circuit and operates with a single supply (1.5–3.6 V) applied to Pin 4 (Vdd). No external bias resistor, reference voltage, or active amplification is required before the output stage - only passive DC-blocking and optional RF filtering.
Can MP33AB01TR be used in waterproof or dustproof enclosures?
Yes - its bottom-port architecture allows mounting behind sealed membranes or gaskets, provided the acoustic port remains unobstructed and aligned with the enclosure aperture. ST specifies no IP rating, but mechanical integration per IEC 60529 IP54+ designs has been validated in customer applications.
How does MP33AB01TR compare to electret condenser microphones (ECMs) in terms of reliability?
Unlike ECMs, the MP33AB01TR uses monolithic silicon MEMS construction with no organic materials or glued diaphragms, eliminating humidity-induced drift, aging effects, and solder-heat degradation. It maintains stable sensitivity and SNR over 10+ years under industrial thermal cycling and vibration stress.
MP33AB01TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- MEMS (Silicon)
- Output Type:
- Analog
- Direction:
- Omnidirectional
- Frequency Range:
- 100 Hz ~ 10 kHz
- Sensitivity:
- -38dB ±3dB @ 94dB SPL
- S/N Ratio:
- 63dB
- Impedance:
- -
- Voltage - Rated:
- 2.2 V
- Voltage Range:
- 1.5 V ~ 3.6 V
- Current - Supply:
- 250 µA
- Port Location:
- Bottom
- Ratings:
- -
- Termination:
- Solder Pads
- Size / Dimension:
- 0.148" L x 0.116" W (3.76mm x 2.95mm)
- Height (Max):
- 0.043" (1.10mm)
- Shape:
- Rectangular
- Grade:
- -
- Qualification:
- -
MP33AB01TR FAQ
1.How can I place an order for MP33AB01TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MP33AB01TR 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 MP33AB01TR reliable?
The price and inventory of MP33AB01TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP33AB01TR is usually 5 days.
3.What payment methods are accepted for MP33AB01TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP33AB01TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP33AB01TR?
MP33AB01TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP33AB01TR 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 MP33AB01TR?
For technical support, including MP33AB01TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP33AB01TR requirements.
6.How does Aetrix verify that MP33AB01TR is sourced from the original manufacturer or authorized distributors?
All MP33AB01TR 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 MP33AB01TR meets industry standards.
7.What is the process for return or replacement of MP33AB01TR?
All MP33AB01TR units undergo pre-shipment inspection (PSI). If there is an issue with MP33AB01TR, 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 MP33AB01TR part is unused and in its original packaging.
Return procedure for MP33AB01TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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