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STMicroelectronics MP23AB01DHTR
- Part No.:
- MP23AB01DHTR
- Manufacturer:
- STMicroelectronics
- Category:
- Microphones
- Package:
- Datasheet:
-
MP23AB01DHTR.pdf
- Description:
- MIC MEMS ANALOG OMNI -38DB
- Quantity:
- Payment:
- Shipping:
Inventory:3,508
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Product details
Overview
MP23AB01DHTR from STMicroelectronics is a high-performance MEMS audio sensor with fully differential analog bottom-port output, -38 dBV sensitivity (±1 dB), 65 dB(A) signal-to-noise ratio, and 135 dBSPL acoustic overload point, deployed in voice-controlled IoT endpoints and compact consumer audio interfaces.
For engineers reviewing the MP23AB01DHTR datasheet, MP23AB01DHTR pinout, MP23AB01DHTR application, or MP23AB01DHTR equivalent, key selection criteria include differential SNR performance, reflow-compatible RHLGA package, extended -40 °C to +85 °C operation, and ESD robustness per IEC61000-4-2 ±8 kV contact discharge.
Technical Context
The MP23AB01DHTR integrates a silicon micromachined capacitive sensing element with an on-chip interface IC optimized for low-noise analog signal conditioning. Its fully differential output architecture rejects common-mode interference from PCB routing and switching supplies.
It operates from 2.3 V to 3.6 V with only 250 µA typical supply current, supports A-weighted 20 Hz–20 kHz bandwidth, and maintains <0.2% THD+N at 94 dBSPL - enabling high-fidelity far-field voice capture without external amplification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity | -38 dBV ±1 dB @ 1 kHz - enables direct connection to low-noise ADCs with minimal gain staging |
| SNR | 65 dB(A) - supports voice activity detection and keyword spotting in ambient noise |
| AOP | 135 dBSPL - withstands loud transients (e.g., speaker feedback, clapping) without clipping |
| Supply voltage | 2.3–3.6 V - compatible with single-cell Li-ion and 3.3 V system rails |
| Current consumption | 250 µA typ. - extends battery life in always-on wake-word detection systems |
| Output type | Fully differential analog - reduces EMI susceptibility and improves PSR to -100 dB |
| Operating temp. | -40 °C to +85 °C - qualified for automotive cabin and industrial edge device deployment |
Pinout & Package
The MP23AB01DHTR uses a 4-lead RHLGA (Reduced Height Land Grid Array) metal cap package measuring 3.35 × 2.5 × 0.98 mm, compliant with standard reflow soldering profiles (peak 260 °C, 20–40 sec within 5 °C of peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vdd | Single positive supply input; requires local 100 nF ceramic bypass capacitor |
| 2 | Output– | Negative differential output; must be routed symmetrically with Output+ to preserve CMRR |
| 3 | Output+ | Positive differential output; pair forms low-impedance 400 Ω source for balanced receiver input |
| 4 | GND | Analog ground reference; connects directly to solid ground plane under sensor footprint |
Key Features
| Feature | Design Value |
|---|---|
| Omnidirectional acoustic response | Uniform 360° pickup pattern enables flexible PCB placement in sealed enclosures |
| High RF immunity | Robust against GSM/Bluetooth interference due to differential topology and internal shielding |
| ECOPACK® compliance | Halogen-free, RoHS-compliant construction with lead-free terminations and green molding compound |
| ESD protection | ±8 kV contact discharge (IEC61000-4-2) - eliminates need for external TVS diodes in most designs |
| Low distortion | <0.2% THD+N at 94 dBSPL - preserves speech intelligibility for ASR engines without post-processing |
Applications
| Smart Speaker Far-Field Voice Capture | Wearable Health Monitor Audio Sensing |
|---|---|
Use Scenario: Capturing voice commands in noisy living rooms with >1 m distance between user and device. IC Role / Device Role / Timing Role: Primary analog microphone element feeding differential input of stereo audio codec. Use Value: 65 dB(A) SNR and 135 dBSPL AOP enable reliable wake-word detection amid fan noise and music playback. | Use Scenario: Monitoring breath sounds and cough frequency during ambulatory pulmonary assessment. IC Role / Device Role / Timing Role: Low-power acoustic front-end capturing physiological waveforms at 16 kHz sampling rate. Use Value: 250 µA quiescent current extends wearable battery life to >7 days on coin cell; -40 °C to +85 °C rating covers clinical and outdoor use. |
| Automotive Cabin Voice Assistant | Industrial Predictive Maintenance Sensor Node |
Use Scenario: Detecting driver voice commands inside vehicles subject to HVAC airflow and road vibration. IC Role / Device Role / Timing Role: Bottom-port MEMS microphone mounted beneath dashboard trim with acoustic port alignment. Use Value: Omnidirectional response and mechanical shock tolerance (10,000 g) ensure consistent pickup despite cabin resonance. | Use Scenario: Acoustic monitoring of motor bearing wear in factory-floor equipment using edge AI inference. IC Role / Device Role / Timing Role: Analog audio sensor interfaced to ultra-low-power microcontroller ADC with oversampling. Use Value: High bandwidth (20 Hz–20 kHz) captures ultrasonic bearing defect signatures; reflow-compatible RHLGA simplifies automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar MEMS microphone applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INVENSENSE ICS-43432 | Digital PDM output; 65 dB SNR; 3.3 V supply; 2.75 × 1.85 × 0.9 mm package | Requires PDM-to-I²S conversion logic; no analog filtering needed | Select when digital interface and lower height are prioritized over analog flexibility |
| TDK INMP522 | Analog output; 62 dB SNR; -38 dBV sensitivity; 3.35 × 2.5 × 0.98 mm package; 120 dBSPL AOP | Lower overload point limits dynamic range in high-SPL environments | Select when cost sensitivity outweighs need for 135 dBSPL headroom |
Compared with ICS-43432 and INMP522, MP23AB01DHTR delivers superior acoustic overload margin and identical footprint compatibility while retaining analog output flexibility - critical for legacy ADC interfaces and custom analog front-end tuning.
Availability
MP23AB01DHTR is available at Aetrix Electronics and suitable for smart speaker development, wearable health monitoring, and automotive voice assistant integration requiring stable component supply across multi-year production cycles.
Supply support for MP23AB01DHTR 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, designing and manufacturing analog, MEMS, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The MP23AB01DHTR belongs to ST's high-SNR MEMS microphone product line, engineered specifically for voice-centric human-machine interfaces where acoustic fidelity, low power, and environmental robustness are co-prioritized.
FAQ
What is the recommended external circuitry for MP23AB01DHTR?
A 100 nF ceramic capacitor must be placed between Vdd and GND close to Pin 1, and a 1 µF bulk capacitor is recommended on the supply rail. No external load resistors or coupling capacitors are required - the differential outputs drive 30 kΩ loads directly with 400 Ω source impedance.
Does MP23AB01DHTR require bias voltage or clock signal?
No. MP23AB01DHTR is a self-contained analog microphone requiring only a DC supply (2.3–3.6 V) on Pin 1. It contains integrated oscillator and signal conditioning circuitry - no external clock, bias resistor, or configuration pins are needed.
How does the RHLGA package differ from standard LGA or QFN?
The RHLGA (Reduced Height Land Grid Array) uses a metal cap with exposed top surface and four perimeter lands - not bottom thermal pad. Its 0.98 mm height and metal lid provide superior acoustic sealing and mechanical stability versus plastic QFN, while maintaining full reflow compatibility.
Can MP23AB01DHTR be used in waterproof or dustproof enclosures?
Yes - its bottom-port design allows acoustic access through a sealed membrane or laser-drilled vent hole in the PCB. The metal cap and hermetic die attach enable IP57-rated enclosure integration when paired with appropriate gasketing and acoustic damping materials.
MP23AB01DHTR 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 ±1dB @ 94dB SPL
- S/N Ratio:
- 65dB
- Impedance:
- 400 Ohms
- Voltage - Rated:
- 2.7 V
- Voltage Range:
- 2.3 V ~ 3.6 V
- Current - Supply:
- 250 µA
- Port Location:
- Bottom
- Ratings:
- -
- Termination:
- Solder Pads
- Size / Dimension:
- 0.132" L x 0.098" W (3.35mm x 2.50mm)
- Height (Max):
- 0.043" (1.10mm)
- Shape:
- Rectangular
- Grade:
- -
- Qualification:
- -
MP23AB01DHTR FAQ
1.How can I place an order for MP23AB01DHTR through Aetrix?
Please submit a Request for Quotation (RFQ) for MP23AB01DHTR 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 MP23AB01DHTR reliable?
The price and inventory of MP23AB01DHTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP23AB01DHTR is usually 5 days.
3.What payment methods are accepted for MP23AB01DHTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP23AB01DHTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP23AB01DHTR?
MP23AB01DHTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP23AB01DHTR 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 MP23AB01DHTR?
For technical support, including MP23AB01DHTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP23AB01DHTR requirements.
6.How does Aetrix verify that MP23AB01DHTR is sourced from the original manufacturer or authorized distributors?
All MP23AB01DHTR 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 MP23AB01DHTR meets industry standards.
7.What is the process for return or replacement of MP23AB01DHTR?
All MP23AB01DHTR units undergo pre-shipment inspection (PSI). If there is an issue with MP23AB01DHTR, 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 MP23AB01DHTR part is unused and in its original packaging.
Return procedure for MP23AB01DHTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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