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STMicroelectronics IMP23ABSUTR
- Part No.:
- IMP23ABSUTR
- Manufacturer:
- STMicroelectronics
- Category:
- Microphones
- Package:
- Datasheet:
-
IMP23ABSUTR.pdf
- Description:
- MIC MEMS ANALOG OMNI -38DB
- Quantity:
- Payment:
- Shipping:
Inventory:1,088
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Product details
Overview
IMP23ABSUTR from STMicroelectronics is a high-performance MEMS microphone IC with ultrasonic bandwidth up to 80 kHz, -38 dBV sensitivity at 94 dBSPL/1 kHz, 64 dB(A) signal-to-noise ratio, 130 dBSPL acoustic overload point, and ultra-low 150 µA max current consumption. It operates from 1.52 V to 3.6 V and is rated for -40 °C to +85 °C, targeting ultrasound-enabled condition monitoring and active noise cancellation.
For engineers reviewing the IMP23ABSUTR datasheet, IMP23ABSUTR pinout, IMP23ABSUTR application, or IMP23ABSUTR equivalent, key selection criteria include extended-frequency response flatness (±1 dB from 100 Hz–8 kHz), RF immunity performance, reflow-compatible RHLGA-5L package geometry, and verified ESD robustness (±8 kV contact per IEC 61000-4-2).
Technical Context
This MEMS microphone integrates a capacitive silicon sensing element with an on-chip amplifier and voltage-output interface in a single die. Its electrical output is DC-biased analog, requiring no external biasing circuitry beyond a load resistor (15 kΩ typical) and supply decoupling.
The device delivers flat frequency response from 35 Hz to 80 kHz, with ultrasonic capability validated up to 80 kHz and acoustic linearity maintained through 130 dBSPL input. PSRR is 60 dB against 1 kHz, 100 mVpp supply ripple, supporting operation in electrically noisy industrial or wearable environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity | -38 dBV ±1 dB @ 94 dBSPL, 1 kHz - enables precise low-level acoustic capture without gain-stage distortion |
| SNR | 64 dB(A) - supports high-fidelity audio digitization with minimal self-noise in hearables and medical instruments |
| AOP | 130 dBSPL typ. - withstands loud transients (e.g., arcing, impact events) without clipping in condition monitoring |
| Supply current | 150 µA max. - extends battery life in wearables and always-on ultrasound sensors |
| Frequency range | 35 Hz – 80 kHz - covers audible and ultrasonic bands for leak detection and structural health monitoring |
| PSRR | 60 dB @ 1 kHz - rejects switching noise from adjacent DC-DC converters in compact PCB layouts |
| Operating temp. | -40 °C to +85 °C - ensures reliability in industrial enclosures and automotive cabin environments |
Pinout & Package
The IMP23ABSUTR is housed in a 3.5 × 2.65 × 0.98 mm RHLGA-5L metal-lid land grid array package, compatible with standard Pb-free reflow profiles (peak 260 °C) and qualified to MSL3 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out | Analog voltage output - directly interfaces with ADC inputs or op-amp buffers; requires 15 kΩ load to GND |
| 2, 3, 4 | GND | Three dedicated ground terminals - reduce impedance path for RF return currents and improve EMI immunity |
| 5 | Vdd | Single-supply input - accepts 1.52–3.6 V; internal regulation eliminates need for external LDO in low-power systems |
Key Features
| Feature | Design Value |
|---|---|
| Ultrasound bandwidth | Extended response up to 80 kHz - enables non-contact leak detection and partial discharge monitoring |
| Enhanced RF immunity | Validated ±8 kV ESD-GUN contact discharge - maintains signal integrity near wireless modules and motor drives |
| Ultra-flat frequency response | ±1 dB mask compliance from 100 Hz to 8 kHz - simplifies equalization in smart speaker and ANC headset designs |
| Low-latency analog output | DC-coupled voltage output with sub-10 µs group delay - supports real-time ultrasound time-of-flight measurements |
| ECOPACK® compliance | RoHS, "Green", and halogen-free construction - meets global environmental requirements for industrial and medical OEMs |
Applications
| Condition Monitoring | Leak Detection |
|---|---|
|
Use Scenario: Continuous acoustic monitoring of rotating machinery (bearings, gearboxes) for early fault signature detection. IC Role / Device Role / Timing Role: MEMS microphone capturing broadband vibration harmonics and ultrasonic emissions (e.g., bearing spalling at 40–60 kHz). Use Value: 130 dBSPL AOP prevents saturation during transient impacts; 80 kHz bandwidth captures incipient faults before audible onset. |
Use Scenario: Non-invasive pressurized gas or vacuum system inspection using ultrasonic emission mapping. IC Role / Device Role / Timing Role: High-SNR, wideband sensor detecting turbulent flow hiss (20–100 kHz) localized via beamforming arrays. Use Value: Flat 35 Hz–80 kHz response enables accurate spectral analysis; -38 dBV sensitivity resolves weak leaks at distance. |
| Electrical Arcing Detection | Active Noise-Canceling Headsets |
|
Use Scenario: Real-time identification of partial discharge and corona in substations, switchgear, and EV charging infrastructure. IC Role / Device Role / Timing Role: Ultrasound transducer capturing 20–100 kHz arcing signatures while rejecting 50/60 Hz power-line interference. Use Value: 60 dB PSRR suppresses conducted supply noise; enhanced RF immunity prevents false triggers near RF sources. |
Use Scenario: Reference microphone in feedforward ANC architecture capturing ambient noise upstream of earcup drivers. IC Role / Device Role / Timing Role: Low-latency, low-noise analog input stage feeding DSP for real-time anti-noise generation. Use Value: 150 µA max current enables multi-mic arrays without compromising battery runtime; 64 dB SNR preserves noise-floor fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar MEMS microphone applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INV-23138-TR | Lower SNR (61 dB), narrower bandwidth (20 Hz–20 kHz), higher current (220 µA) | Limited to audible-band ANC and voice pickup; unsuitable for ultrasound diagnostics | Select when cost sensitivity outweighs ultrasonic capability and power budget allows >70 µA extra draw |
| MP34DT06JTR | Digital PDM output, 64 dB SNR, 100 kHz bandwidth, but requires clock and digital interface support | Requires FPGA/microcontroller with PDM decimation; adds layout complexity vs. analog simplicity | Prefer when system already uses PDM microphones and needs synchronous multi-channel sampling |
Compared with INV-23138-TR and MP34DT06JTR, the IMP23ABSUTR uniquely balances analog simplicity, ultrasonic reach, and sub-200 µA operation-making it optimal for battery-powered ultrasound sensing where digital overhead or audible-only response is unacceptable.
Availability
IMP23ABSUTR is available at Aetrix Electronics and suitable for condition monitoring, leak detection, electrical arcing analysis, and active noise-canceling headsets requiring stable component supply across industrial, medical, and consumer electronics programs.
Supply support for IMP23ABSUTR 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 devices for industrial, automotive, and consumer markets.
The IMP23ABSUTR belongs to ST's high-performance MEMS microphone product line, engineered specifically for applications demanding extended frequency response, low power, and robust operation in electromagnetically hostile environments.
FAQ
What is the recommended load resistance for IMP23ABSUTR?
The datasheet specifies a nominal load resistance of 15 kΩ between the OUT pin and GND. This value optimizes SNR and output swing while maintaining stability across temperature and supply voltage variations. Lower values degrade SNR; higher values increase susceptibility to noise coupling and may affect high-frequency response.
Can IMP23ABSUTR be used in humid or outdoor environments?
The RHLGA-5L package provides hermetic metal-lid protection, and the device is qualified for 85°C/85% RH bias testing (1000 hours). While not IP-rated, its construction supports use in sealed enclosures for industrial condition monitoring and indoor hearables-but direct exposure to condensation or immersion is not supported.
Does IMP23ABSUTR require external biasing or filtering?
No external biasing is required-the device outputs a DC-biased analog voltage referenced to Vdd/2. A simple 100 nF ceramic decoupling capacitor on Vdd and a 15 kΩ load to GND constitute the minimal external circuit. Optional RC low-pass filtering may be added post-OUT if system-level EMI mitigation is needed.
How does the IMP23ABSUTR perform under mechanical shock?
It passes guided free-fall (1.5 m, 6 directions) and random tumble (1 m, 300 drops) per IEC 60068-2-32, plus 10,000 g mechanical shock per MIL-STD-883. These tests confirm robustness for handheld, wearable, and mobile industrial equipment where vibration and impact are routine.
IMP23ABSUTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- MEMS (Silicon)
- Output Type:
- Analog
- Direction:
- Omnidirectional
- Frequency Range:
- 35 Hz ~ 15 kHz
- Sensitivity:
- -38db ±1dB
- S/N Ratio:
- 64dB
- Impedance:
- -
- Voltage - Rated:
- 2.75 V
- Voltage Range:
- 1.52 V ~ 3.6 V
- Current - Supply:
- 150 µA
- Port Location:
- Bottom
- Ratings:
- -
- Termination:
- Solder Pads
- Size / Dimension:
- 0.130" L x 0.097" W (3.31mm x 2.46mm)
- Height (Max):
- 0.039" (0.98mm)
- Shape:
- Rectangle
- Grade:
- -
- Qualification:
- -
IMP23ABSUTR FAQ
1.How can I place an order for IMP23ABSUTR through Aetrix?
Please submit a Request for Quotation (RFQ) for IMP23ABSUTR 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 IMP23ABSUTR reliable?
The price and inventory of IMP23ABSUTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IMP23ABSUTR is usually 5 days.
3.What payment methods are accepted for IMP23ABSUTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IMP23ABSUTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IMP23ABSUTR?
IMP23ABSUTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IMP23ABSUTR 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 IMP23ABSUTR?
For technical support, including IMP23ABSUTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IMP23ABSUTR requirements.
6.How does Aetrix verify that IMP23ABSUTR is sourced from the original manufacturer or authorized distributors?
All IMP23ABSUTR 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 IMP23ABSUTR meets industry standards.
7.What is the process for return or replacement of IMP23ABSUTR?
All IMP23ABSUTR units undergo pre-shipment inspection (PSI). If there is an issue with IMP23ABSUTR, 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 IMP23ABSUTR part is unused and in its original packaging.
Return procedure for IMP23ABSUTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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