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STMicroelectronics MP33AB01
- Part No.:
- MP33AB01
- Manufacturer:
- STMicroelectronics
- Category:
- Microphones
- Package:
- Datasheet:
-
MP33AB01.pdf
- Description:
- MIC MEMS ANALOG OMNI -38DB
- Quantity:
- Payment:
- Shipping:
Inventory:3,019
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Product details
Overview
MP33AB01 from STMicroelectronics is a MEMS audio microphone with analog output, bottom-port configuration, and surface-mount RHLGA package (3.76 × 2.95 × 1.0 mm). It delivers omnidirectional sensitivity, 63 dB signal-to-noise ratio, 100 Hz–10 kHz frequency range, and operates from 1.5–3.6 V supply across –30 °C to +100 °C - used in compact voice capture systems including portable voice recorders and hands-free communication modules.
For engineers reviewing the MP33AB01 datasheet, MP33AB01 pinout, MP33AB01 application, or MP33AB01 equivalent, key selection criteria include its low-power analog output interface (0.25 mA typical current), high acoustic overload point (125 dBSPL), reflow-compatible RHLGA package, and guaranteed extended-temperature operation for industrial-grade audio sensing.
Technical Context
The MP33AB01 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, requiring external DC-blocking capacitance (C1 > 1 µF) to set audio bandpass cutoff below 20 Hz.
It features fixed internal biasing and no digital control lines - all functionality is passive and voltage-driven. Acoustic performance is characterized at 1 kHz with –38 dBV typical sensitivity (0 dB = 1 V/Pa), <1% THD at 94 dBSPL, and 10% THD at 125 dBSPL overload threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 1.5–3.6 V - supports direct connection to common low-voltage rails (e.g., 2.2 V LDO) without level-shifting. |
| Current consumption | 0.25 mA typ. at 2.2 V - enables multi-microphone arrays in battery-powered devices with minimal power budget impact. |
| Frequency range | 100–10,000 Hz - covers full speech band and extends into ultrasonic detection range for wake-word or gesture recognition. |
| Signal-to-noise ratio | 63 dB - provides clean analog output with ≥60 dB dynamic range for 16-bit ADC front-end compatibility. |
| Sensitivity | –38 dBV (typ.) at 1 kHz - delivers ~12.6 mV/Pa output amplitude, compatible with standard op-amp gain stages. |
| Operating temperature | –30 °C to +100 °C - qualified for under-hood, industrial enclosure, or outdoor consumer device deployment. |
| Acoustic overload point | 125 dBSPL - withstands loud transient sounds (e.g., clapping, door slams) without clipping or permanent distortion. |
Pinout & Package
RHLGA (3.76 × 2.95 × 1.0 mm) package with exposed ground paddle; RoHS-compliant, reflow-solderable, and qualified per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output | Analog output node - requires external DC-blocking capacitor (C1 > 1 µF) before downstream amplifier/ADC. |
| 2, 3, 5, 6 | GND | Four dedicated ground terminals - ensure low-impedance return path and minimize noise coupling in high-SNR audio paths. |
| 4 | Vdd | Single positive supply input - powers both MEMS transducer and ASIC; decoupling capacitor (C3 = 1 µF) required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Omnidirectional acoustic response | Uniform 360° pickup pattern - eliminates orientation dependency in space-constrained enclosures like earbuds or smart speakers. |
| High SNR (63 dB) | Enables direct interface to 16-bit ADCs without additional amplification - reduces BOM count and PCB area. |
| Extended temperature range (–30 °C to +100 °C) | Validated operation beyond commercial grade - suitable for automotive cabin modules and industrial IoT edge nodes. |
| Bottom-port configuration | Mounts flush with PCB - allows sealed front cavity design and simplifies mechanical integration in slim-profile devices. |
| Reflow-compatible RHLGA package | Compatible with standard SMT assembly lines - no special handling or post-soldering cleaning required. |
Applications
| Voice-Controlled Smart Home Hub | Industrial Voice Logger for Hazardous Environments |
|---|---|
Use Scenario: Captures voice commands in ambient-noise environments (e.g., kitchen, garage) with variable background sound levels. IC Role / Device Role / Timing Role: Analog audio sensor providing continuous low-power voice input to ASR engine. Use Value: 63 dB SNR and 125 dBSPL overload tolerance maintain command recognition accuracy during sudden loud noises (e.g., blender activation). |
Use Scenario: Records operator verbal reports in oil-field control rooms where temperature swings exceed –20 °C to +85 °C. IC Role / Device Role / Timing Role: Primary acoustic transducer in intrinsically safe logging system with isolated power and signal paths. Use Value: Guaranteed operation from –30 °C to +100 °C and robust ESD protection enable reliable deployment without thermal derating or shielding. |
| Compact Wearable Fitness Tracker | Multi-Microphone Conference Bar |
Use Scenario: Detects spoken prompts (e.g., "start workout") while worn on wrist with partial acoustic occlusion. IC Role / Device Role / Timing Role: Low-profile bottom-port MEMS microphone enabling thin form factor and consistent acoustic coupling through elastomer housing. Use Value: 1.0 mm height and 3.76 × 2.95 mm footprint allow placement beneath curved plastic bezels without air gap compromise. |
Use Scenario: Forms one element of a 4-mic linear array for beamforming and noise suppression in meeting room audio systems. IC Role / Device Role / Timing Role: Analog-output node synchronized via shared Vdd rail and matched external RC filtering (C1 > 1 µF). Use Value: Tight sensitivity tolerance (–41 to –35 dBV) and identical frequency response across units ensure coherent phase alignment in DSP-based beamformer algorithms. |
Availability
MP33AB01 is available at Aetrix Electronics and suitable for voice interface modules, industrial audio loggers, wearable health monitors, and multi-microphone conferencing systems requiring stable component supply over extended product lifecycles.
Supply support for MP33AB01 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, designing and manufacturing microcontrollers, sensors, power ICs, and analog components for industrial, automotive, and consumer markets.
The MP33AB01 belongs to ST's MEMS microphone product line, engineered specifically for high-fidelity, low-power analog audio capture in space- and power-constrained edge devices - not intended for digital interface or programmable gain applications.
FAQ
What is the recommended external capacitor value for the MP33AB01 output pin?
A minimum 1 µF DC-blocking capacitor (C1) is required on the output pin to establish an audio bandpass with the downstream input impedance. For typical 20 kΩ input resistance, C1 > 1 µF ensures a 3 dB cutoff frequency well below 20 Hz, preserving full speech bandwidth without DC offset accumulation.
Does the MP33AB01 require a reference voltage or digital interface lines?
No. The MP33AB01 is a fully self-contained analog-output MEMS microphone with no reference voltage (Vref) pin or digital control interface. It operates from a single Vdd supply (1.5–3.6 V) and outputs a biased AC signal that must be AC-coupled before amplification or digitization.
Can the MP33AB01 be used in automotive cabin applications?
Yes - its –30 °C to +100 °C operating range and qualification for reflow soldering meet under-dash and center-console environmental requirements. However, it is not AEC-Q100 qualified and must be validated per end-system safety and reliability standards before automotive series production use.
How does the MP33AB01 handle mechanical shock and ESD?
The device is explicitly marked as sensitive to mechanical shock and ESD. ST recommends strict handling per IEC 61340-5-1, use of grounded workstations, and avoidance of direct probe contact with the top membrane. PCB layout must avoid mounting stress on the package edges to prevent diaphragm damage.
MP33AB01 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Active
- 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:
- -
MP33AB01 FAQ
1.How can I place an order for MP33AB01 through Aetrix?
Please submit a Request for Quotation (RFQ) for MP33AB01 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 MP33AB01 reliable?
The price and inventory of MP33AB01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP33AB01 is usually 5 days.
3.What payment methods are accepted for MP33AB01?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP33AB01 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP33AB01?
MP33AB01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP33AB01 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 MP33AB01?
For technical support, including MP33AB01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP33AB01 requirements.
6.How does Aetrix verify that MP33AB01 is sourced from the original manufacturer or authorized distributors?
All MP33AB01 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 MP33AB01 meets industry standards.
7.What is the process for return or replacement of MP33AB01?
All MP33AB01 units undergo pre-shipment inspection (PSI). If there is an issue with MP33AB01, 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 MP33AB01 part is unused and in its original packaging.
Return procedure for MP33AB01:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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