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STMicroelectronics IMP34DT05TR
- Part No.:
- IMP34DT05TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microphones
- Package:
- Datasheet:
-
IMP34DT05TR.pdf
- Description:
- MIC MEMS DIGITAL PDM OMNI -26DB
- Quantity:
- Payment:
- Shipping:
Inventory:3,683
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Product details
Overview
IMP34DT05TR from STMicroelectronics is an ultra-compact, low-power, omnidirectional digital MEMS microphone with PDM output, –26 dBFS ±3 dB sensitivity, 64 dB(A) signal-to-noise ratio, and 122.5 dBSPL acoustic overload point. It operates from 1.6–3.6 V over –40 °C to +85 °C in industrial audio sensing applications including predictive maintenance and sound-triggered alarm systems.
For engineers reviewing the IMP34DT05TR datasheet, IMP34DT05TR pinout, IMP34DT05TR application, or IMP34DT05TR equivalent, key selection criteria include PDM timing compliance (1.2–3.25 MHz clock), L/R channel configuration logic, EMI-shielded HCLGA package integration, and power-down current of 5 µA for battery-sensitive designs.
Technical Context
The IMP34DT05TR integrates a capacitive silicon MEMS sensing element with a dedicated CMOS interface IC to deliver single-bit PDM output synchronized to an external clock. Its L/R pin selects left/right data alignment on DOUT by controlling high-impedance states per clock edge - enabling stereo pairing without additional control logic.
It features A-weighted SNR of 64 dB at 94 dB SPL, THD+N of 0.2% at 94 dBSPL, and guaranteed operation across –40 °C to +85 °C. The device uses a top-port HCLGA package with integrated EMI shielding and a grounded ring for mechanical robustness and acoustic integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 1.6–3.6 V - supports direct connection to 1.8 V or 3.3 V system rails without regulation |
| Current consumption (normal mode) | 650 µA typical - enables multi-microphone arrays in power-constrained edge nodes |
| Sensitivity | –26 dBFS ±3 dB - ensures consistent digital output level across production units for calibrated audio processing |
| SNR | 64 dB(A) - provides sufficient dynamic range for voice interface and noise-cancellation algorithms |
| Acoustic overload point | 122.5 dBSPL - withstands loud transient events (e.g., alarms, machinery bursts) without clipping |
| Input clock frequency | 1.2–3.25 MHz - aligns with standard PDM decimation filters in DSPs and audio SoCs |
| Turn-on time | 10 ms - defines minimum wake-up latency after power-down exit for responsive triggering |
Pinout & Package
HCLGA 4LD package (3 × 4 × 1 mm), top-port, EMI-shielded, SMD-compliant, with exposed ground ring for mechanical stability and RF immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vdd | Power supply input | Supplies both MEMS transducer and CMOS interface; requires local 100 nF + 1 µF decoupling |
| LR | Left/right channel select | Logic-high selects right-channel data on rising CLK; logic-low selects left-channel data on falling CLK |
| CLK | Synchronization clock input | Drives internal sampling and PDM bitstream timing; duty cycle must be 40–60% |
| DOUT | PDM data output | Single-bit stream carrying left/right audio based on LR state; high-impedance when inactive |
| GND (ring) | Ground reference and EMI shield anchor | Exposed metal ring provides low-inductance return path and shields internal circuitry from board noise |
Key Features
| Feature | Design Value |
|---|---|
| Omnidirectional PDM output | Enables consistent 360° acoustic capture without directional bias, simplifying PCB layout in compact enclosures |
| EMI-shielded HCLGA package | Integrated metal can suppresses radiated noise coupling into sensitive analog front-end, critical for industrial EMI environments |
| L/R channel selection via single pin | Eliminates need for separate left/right devices or external multiplexing logic in stereo configurations |
| Low power-down current (5 µA) | Supports always-listening modes in battery-powered vibration monitors and anti-tampering sensors |
| –40 °C to +85 °C operating range | Validated for deployment in harsh industrial settings including factory floors and outdoor security systems |
Applications
| Vibration Monitoring | Noise-Cancelling Headsets |
|---|---|
|
Use Scenario: Continuous monitoring of bearing or motor housing vibrations in predictive maintenance systems. IC Role / Device Role / Timing Role: Digital acoustic sensor capturing broadband mechanical signatures for FFT-based anomaly detection. Use Value: 64 dB SNR and 122.5 dBSPL AOP enable reliable capture of subtle fault harmonics amid background plant noise. |
Use Scenario: Reference microphone in dual-mic adaptive noise cancellation for wireless headsets. IC Role / Device Role / Timing Role: Far-field ambient noise sampler feeding real-time DSP filter adaptation. Use Value: Omnidirectional response and tight sensitivity tolerance (±3 dB) ensure consistent noise modeling across units. |
| Sound-Activated Alarm Systems | Human/Machine Voice Interface |
|
Use Scenario: Acoustic trigger for intrusion detection in security panels using glass-break or scream recognition. IC Role / Device Role / Timing Role: Always-on PDM sensor feeding low-latency wake-up engine in microcontroller. Use Value: 10 ms turn-on time and 5 µA power-down current allow rapid event response without draining backup batteries. |
Use Scenario: Wake-word microphone in smart speakers and industrial HMIs requiring far-field voice pickup. IC Role / Device Role / Timing Role: Primary audio input transducing speech into PDM stream for ASR preprocessing. Use Value: –26 dBFS sensitivity and top-port design optimize SNR in vertically mounted enclosures with limited acoustic aperture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital MEMS microphone applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INMP522DTTR | Lower SNR (61 dB), no EMI shielding, bottom-port package | Less suitable for noisy industrial PCBs; requires careful layout isolation | Prefer when cost sensitivity outweighs EMI robustness and SNR margin |
| MP34DT06JTR | Higher sensitivity (–26 dBFS same), but wider tolerance (±4 dB); identical HCLGA package | Acceptable where tighter sensitivity matching is not required for calibration | Choose for legacy compatibility if existing designs use MP34DT06JTR footprint |
Compared with INMP522DTTR and MP34DT06JTR, the IMP34DT05TR delivers superior EMI immunity and tighter sensitivity tolerance, making it optimal for industrial-grade audio sensing where board-level noise and unit-to-unit consistency are critical.
Availability
IMP34DT05TR is available at Aetrix Electronics and suitable for predictive maintenance systems, sound-triggered alarm devices, and human/machine voice interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for IMP34DT05TR 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 analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The IMP34DT05TR belongs to ST's industrial-grade MEMS audio sensor product line, engineered specifically for high-reliability acoustic sensing in electrically noisy, thermally demanding environments.
FAQ
What is the recommended power supply decoupling for IMP34DT05TR?
Place a 100 nF ceramic capacitor and a 1 µF ceramic capacitor as close as possible to Pin 1 (Vdd), with short, low-inductance traces to the ground ring. This minimizes supply ripple and prevents modulation of the PDM output due to switching noise on shared rails.
How does the L/R pin configure stereo operation?
When LR = Vdd, valid PDM data appears on DOUT at CLK high; when LR = GND, valid data appears at CLK low. Two IMP34DT05TRs can be wired in parallel with opposite LR states to generate interleaved left/right streams without external logic.
Is the IMP34DT05TR susceptible to mechanical shock during assembly?
Yes - the MEMS diaphragm is sensitive to mechanical shock. ST specifies strict pick-and-place guidelines: avoid vacuum contact with the top port, limit nozzle vacuum to ≤7 psi, and use the recommended cross-recessed nozzle to prevent membrane deformation during SMT placement.
What soldering profile should be used for the HCLGA package?
Follow JEDEC J-STD-020 Level 3 profile: peak temperature ≤260 °C, time above liquidus (217 °C) 60–150 sec, ramp-up rate ≤3 °C/sec, and total time from 25 °C to peak ≤8 minutes. Land pattern must match Figure 12 in DS12725 Rev 4.
IMP34DT05TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- MEMS (Silicon)
- Output Type:
- Digital, PDM
- Direction:
- Omnidirectional
- Frequency Range:
- 100 Hz ~ 10 kHz
- Sensitivity:
- -26dB ±3dB @ 94dB SPL
- S/N Ratio:
- 64dB
- Impedance:
- -
- Voltage - Rated:
- 1.8 V
- Voltage Range:
- -
- Current - Supply:
- 650 µA
- Port Location:
- Top
- Ratings:
- -
- Termination:
- Solder Pads
- Size / Dimension:
- 0.118" L x 0.157" W (3.00mm x 4.00mm)
- Height (Max):
- 0.043" (1.10mm)
- Shape:
- Rectangular
- Grade:
- -
- Qualification:
- -
IMP34DT05TR FAQ
1.How can I place an order for IMP34DT05TR through Aetrix?
Please submit a Request for Quotation (RFQ) for IMP34DT05TR 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 IMP34DT05TR reliable?
The price and inventory of IMP34DT05TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IMP34DT05TR is usually 5 days.
3.What payment methods are accepted for IMP34DT05TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IMP34DT05TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IMP34DT05TR?
IMP34DT05TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IMP34DT05TR 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 IMP34DT05TR?
For technical support, including IMP34DT05TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IMP34DT05TR requirements.
6.How does Aetrix verify that IMP34DT05TR is sourced from the original manufacturer or authorized distributors?
All IMP34DT05TR 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 IMP34DT05TR meets industry standards.
7.What is the process for return or replacement of IMP34DT05TR?
All IMP34DT05TR units undergo pre-shipment inspection (PSI). If there is an issue with IMP34DT05TR, 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 IMP34DT05TR part is unused and in its original packaging.
Return procedure for IMP34DT05TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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