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STMicroelectronics MP23AB01DM
- Part No.:
- MP23AB01DM
- Manufacturer:
- STMicroelectronics
- Category:
- Microphones
- Package:
- Datasheet:
-
MP23AB01DM.pdf
- Description:
- MIC MEMS ANALOG OMNI -38DB
- Quantity:
- Payment:
- Shipping:
Inventory:2,460
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Product details
Overview
MP23AB01DM from STMicroelectronics is a high-performance MEMS audio sensor with fully differential analog bottom-port output, -38 dBV ±3 dB sensitivity at 1 kHz, 64 dB(A) signal-to-noise ratio, 130 dBSPL acoustic overload point, and operation from -40 °C to +85 °C in a 3.35 × 2.5 × 0.98 mm RHLGA metal cap package - used in voice-controlled smart speakers and portable voice-recognition devices.
For engineers reviewing the MP23AB01DM datasheet, MP23AB01DM pinout, MP23AB01DM application, or MP23AB01DM equivalent, key selection criteria include differential SNR performance, reflow-compatible packaging, RF immunity, AOP headroom for loud environments, and compatibility with low-voltage (2.1–3.6 V) biasing circuits.
Technical Context
The MP23AB01DM integrates a silicon micromachined capacitive transducer with an on-chip ASIC interface, delivering fully differential analog output to suppress common-mode noise in noisy PCB environments. Its A-weighted SNR of 64 dB and THD+N < 0.5% at 94 dBSPL enable high-fidelity far-field voice capture.
It operates from a single 2.1–3.6 V supply with only 250 µA quiescent current, features 400 Ω output impedance, supports 300 pF load capacitance and 10 kΩ load resistance, and maintains stable performance across its full -40 °C to +85 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity | -38 dBV ±3 dB @ 1 kHz (0 dB = 1 V/Pa); enables consistent voltage-level audio signal scaling into ADC front-ends |
| SNR | 64 dB(A); provides clean voice capture in ambient noise up to ~55 dB(A) |
| AOP | 130 dBSPL; withstands loud transient sounds (e.g., claps, alarms) without clipping |
| Supply Voltage | 2.1–3.6 V; compatible with standard Li-ion and 3.3 V system rails |
| Current Consumption | 250 µA typical; supports always-on voice wake-up in battery-powered devices |
| Output Type | Fully differential analog; rejects EMI and PCB-coupled noise better than single-ended mics |
| Operating Temp | -40 °C to +85 °C; qualified for industrial and automotive cabin voice interfaces |
Pinout & Package
RHLGA metal cap 4-lead package, dimensions 3.35 × 2.5 × 0.98 mm, reflow-solder compatible, ECOPACK® compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vdd | Positive supply input | Bias rail for internal ASIC; requires local 100 nF decoupling near pin |
| 2 - OUT- | Negative differential output | Complementary signal path; must be routed with matched length/impedance to OUT+ |
| 3 - OUT+ | Positive differential output | Main signal path; connects to differential-input amplifier or ADC driver stage |
| 4 - Ground | Analog ground reference | Return path for transducer and ASIC; must connect to low-impedance AGND plane |
Key Features
| Feature | Design Value |
|---|---|
| Omnidirectional acoustic response | Uniform 360° pickup pattern enables flexible PCB placement without directional alignment |
| High RF immunity | Robust operation in cellular/Wi-Fi-rich environments without external shielding |
| Reflow-compatible RHLGA package | Enables automated SMT assembly without special thermal profiles beyond JEDEC J-STD-020 |
| Low THD+N at high SPL | < 0.5% at 94 dBSPL ensures minimal harmonic distortion in voice-band signals |
| Extended temperature range | Validated operation from -40 °C to +85 °C supports deployment in uncontrolled environments |
Applications
| Smart Speaker Voice Input | Wearable Voice Assistant |
|---|---|
Use Scenario: Multi-microphone array in cylindrical smart speaker housing capturing voice commands from any angle. IC Role / Device Role / Timing Role: Bottom-port MEMS microphone providing differential analog output to DSP pre-amplifier stage. Use Value: Omnidirectional response and 64 dB(A) SNR enable reliable wake-word detection at 1–3 m distance in living-room noise. | Use Scenario: Compact ear-worn device requiring ultra-low-profile audio sensing with minimal board space. IC Role / Device Role / Timing Role: Analog MEMS sensor feeding low-power voice activity detector (VAD) circuitry. Use Value: 0.98 mm height and 250 µA current allow continuous listening mode in coin-cell-powered wearables. |
| Industrial Voice-Controlled HMI | Automotive Cabin Voice Interface |
Use Scenario: Factory-floor human-machine interface exposed to vibration, dust, and wide ambient temperature swings. IC Role / Device Role / Timing Role: Acoustic sensor in sealed enclosure interfacing with isolated analog front-end. Use Value: -40 °C to +85 °C rating and 130 dBSPL AOP ensure reliability during equipment startup/shutdown transients. | Use Scenario: In-cabin voice command system mounted near A-pillar or overhead console. IC Role / Device Role / Timing Role: Differential microphone mitigating ignition noise and RF interference from infotainment modules. Use Value: High RF immunity and common-mode rejection preserve speech clarity amid 2 GHz LTE/Bluetooth emissions. |
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 | Differential output, 65 dB SNR, but 3.5 mm × 2.65 mm × 0.98 mm package; slightly higher sensitivity (-37 dBV) | Same bottom-port layout; requires identical PCB footprint adjustment | Preferred where marginally higher SNR justifies minor board revision |
| TDK INMP522 | Single-ended output, 62 dB SNR, 3.35 mm × 2.5 mm × 0.88 mm; lower profile but no differential noise rejection | Not suitable for EMI-heavy environments without added filtering | Select only when cost or height constraints outweigh SNR/noise-rejection requirements |
Compared with ICS-43432 and INMP522, the MP23AB01DM uniquely balances differential noise immunity, industry-leading 130 dBSPL AOP, and strict reflow-compliant packaging - making it optimal for rugged, high-SNR voice interfaces where PCB-level EMI cannot be fully controlled.
Availability
MP23AB01DM is available at Aetrix Electronics and suitable for smart speaker development, wearable voice assistant design, and industrial HMI systems requiring stable component supply and long-term production continuity.
Supply support for MP23AB01DM 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/mixed-signal devices for industrial, automotive, and consumer markets.
The MP23AB01DM belongs to ST's high-SNR MEMS microphone product line, engineered specifically for voice-first edge devices demanding robust acoustic performance under real-world electrical and environmental stress.
FAQ
What is the recommended PCB layout for MP23AB01DM's differential outputs?
Route OUT+ and OUT- as tightly coupled, equal-length microstrip traces with controlled 100 Ω differential impedance. Place decoupling capacitor (100 nF X7R) within 2 mm of Vdd pin, and isolate microphone cavity from PCB vias or copper under the port opening using solder mask-defined aperture.
Does MP23AB01DM require external biasing components?
No external biasing components are required. The device integrates all necessary bias circuitry and operates directly from a single 2.1–3.6 V supply. Only a local 100 nF ceramic decoupling capacitor on Vdd is mandatory per the datasheet layout guidelines.
Can MP23AB01DM be used in waterproof or dustproof enclosures?
Yes - its bottom-port architecture allows integration behind gaskets or membranes. The RHLGA metal cap provides mechanical protection, and the specified IP57-rated external enclosure (not the mic itself) ensures environmental sealing while maintaining acoustic coupling through properly tuned vent paths.
How does MP23AB01DM's THD+N performance scale with input SPL?
THD+N remains below 0.5% up to 94 dBSPL, rises to <4% at 120 dBSPL, and stays under 10% at maximum rated 130 dBSPL - enabling accurate voice capture even during sharp transients like door slams or keyboard typing without digital clipping compensation.
MP23AB01DM 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:
- 64dB
- Impedance:
- 400 Ohms
- Voltage - Rated:
- -
- Voltage Range:
- 2.1 V ~ 3.6 V
- Current - Supply:
- 250 µA
- Port Location:
- Bottom
- Ratings:
- -
- Termination:
- Surface Mount
- Size / Dimension:
- 0.132" L x 0.098" W (3.35mm x 2.50mm)
- Height (Max):
- 0.043" (1.08mm)
- Shape:
- Rectangular
- Grade:
- -
- Qualification:
- -
MP23AB01DM FAQ
1.How can I place an order for MP23AB01DM through Aetrix?
Please submit a Request for Quotation (RFQ) for MP23AB01DM 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 MP23AB01DM reliable?
The price and inventory of MP23AB01DM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP23AB01DM is usually 5 days.
3.What payment methods are accepted for MP23AB01DM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP23AB01DM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP23AB01DM?
MP23AB01DM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP23AB01DM 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 MP23AB01DM?
For technical support, including MP23AB01DM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP23AB01DM requirements.
6.How does Aetrix verify that MP23AB01DM is sourced from the original manufacturer or authorized distributors?
All MP23AB01DM 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 MP23AB01DM meets industry standards.
7.What is the process for return or replacement of MP23AB01DM?
All MP23AB01DM units undergo pre-shipment inspection (PSI). If there is an issue with MP23AB01DM, 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 MP23AB01DM part is unused and in its original packaging.
Return procedure for MP23AB01DM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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