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STMicroelectronics MP34DT05TR-A
- Part No.:
- MP34DT05TR-A
- Manufacturer:
- STMicroelectronics
- Category:
- Microphones
- Package:
- Datasheet:
-
MP34DT05TR-A.pdf
- Description:
- MIC MEMS DIGITAL PDM OMNI -26DB
- Quantity:
- Payment:
- Shipping:
Inventory:114,381
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Product details
Overview
MP34DT05TR-A from STMicroelectronics is an ultra-compact, low-power, omnidirectional digital MEMS microphone with PDM output, –26 dBFS ±3 dB sensitivity, 64 dB(A) SNR, and 122.5 dBSPL acoustic overload point. It operates from 1.6–3.6 V over –40 °C to +85 °C in an HCLGA 4LD (3 × 4 × 1 mm) top-port package and is used in mobile terminals, VoIP handsets, and speech recognition systems.
For engineers reviewing the MP34DT05TR-A datasheet, MP34DT05TR-A pinout, MP34DT05TR-A application, or MP34DT05TR-A equivalent, key selection criteria include PDM interface timing compliance (1.2–3.25 MHz clock), EMI-shielded top-port packaging, L/R channel selection logic, and low-distortion performance at high SPL (≤6% THD+N at 120 dBSPL).
Technical Context
The MP34DT05TR-A integrates a capacitive silicon MEMS sensing element with a dedicated CMOS IC interface that outputs a single-bit PDM stream synchronized to an external clock. Its L/R pin selects left- or right-channel data alignment on DOUT by controlling high-impedance states per clock edge.
It features a 200 kΩ internal pull-down on the L/R pin, enabling flexible stereo configuration without mandatory external biasing. Timing-critical parameters include Tdv ≤105 ns (data valid delay) and Ton = 10 ms turn-on time, both specified under CLOAD = 100 pF and fCLK = 2.4 MHz.
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 |
| SNR | 64 dB(A) - enables clear voice capture in noisy environments (e.g., mobile calls, VR input) |
| Sensitivity | –26 dBFS ±3 dB - ensures consistent digital full-scale alignment across production units |
| AOP | 122.5 dBSPL - withstands loud transients (e.g., speaker feedback, gunshot detection) without clipping |
| Current consumption | 650 µA typical in normal mode - extends battery life in portable voice-enabled devices |
| Operating temperature | –40 °C to +85 °C - qualified for automotive cabin, industrial IoT, and outdoor consumer use |
| Input clock frequency | 1.2–3.25 MHz - compatible with standard audio codec clock domains and FPGA PDM receivers |
Pinout & Package
HCLGA 4LD (3 mm × 4 mm × 1 mm) top-port package with EMI shielding, RoHS/ECOPACK compliance, and SMD reflow compatibility (JEDEC J-STD-020 Class 3). Includes ground ring for mechanical stability and acoustic isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vdd | Power supply input | Accepts 1.6–3.6 V; requires local 100 nF + 1 µF decoupling adjacent to pin 1 |
| LR | Left/right channel select | Logic-high = DOUT valid on CLK high; logic-low = DOUT valid on CLK low; internal 200 kΩ pull-down |
| CLK | Master synchronization clock | Drives internal sampling; duty cycle 40–60%; max 3.25 MHz; defines PDM bit rate |
| DOUT | PDM data output | Single-bit stream; high-impedance state toggles per LR setting; load ≤100 pF |
| GND (ring) | Signal and shield ground | Ground ring surrounds die cavity to suppress EMI and improve acoustic rejection |
Key Features
| Feature | Design Value |
|---|---|
| Omnidirectional PDM output | Enables compact stereo array design using two identical microphones with LR pin differentiation |
| Top-port EMI-shielded package | Eliminates need for external metal can or PCB-level shielding in noise-sensitive applications |
| Low distortion at high SPL | 0.2% THD+N @ 94 dBSPL ensures fidelity for far-field voice pickup and ASR training |
| Extended temperature operation | Validated performance from –40 °C to +85 °C supports deployment in automotive infotainment and outdoor security cameras |
| Power-down mode | 5 µA quiescent current enables rapid sleep/wake cycles in always-listening edge devices |
Applications
| Mobile Voice Capture | Voice-Controlled Gaming |
|---|---|
Use Scenario: Front-facing microphone in smartphones for telephony, video conferencing, and voice assistant wake-word detection. IC Role / Device Role / Timing Role: Primary PDM audio sensor providing low-noise, high-SNR digitized voice stream synchronized to baseband processor clock. Use Value: 64 dB(A) SNR and –26 dBFS sensitivity ensure reliable speech intelligibility even with aggressive acoustic echo cancellation. |
Use Scenario: Headset-integrated mic array for real-time voice command input in VR/AR gaming headsets. IC Role / Device Role / Timing Role: Dual-mic PDM source feeding FPGA-based beamforming engine with precise inter-channel timing alignment via shared CLK. Use Value: Top-port layout and 122.5 dBSPL AOP prevent clipping during sudden vocal bursts or game audio feedback. |
| Smart Speaker Far-Field Array | Industrial Speech Recognition Terminal |
Use Scenario: Circular 4-mic array embedded in smart speaker enclosure for 360° voice pickup and noise-robust ASR. IC Role / Device Role / Timing Role: Identical PDM sensors with matched sensitivity (±3 dB) enabling coherent beamforming without per-unit calibration. Use Value: Tight sensitivity tolerance and stable 64 dB SNR across temperature ensure consistent directional gain in adaptive algorithms. |
Use Scenario: Ruggedized handheld terminal in warehouse or factory floor for hands-free inventory commands. IC Role / Device Role / Timing Role: Primary acoustic interface operating continuously in harsh thermal and EMI environments (-40 °C to +85 °C, motor drive noise). Use Value: EMI-shielded HCLGA package and 64 dB SNR maintain ASR accuracy despite ambient electrical interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital MEMS microphone applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IM69D130V54A | Higher SNR (69 dB), bottom-port, larger LGA-5 package (4.72 × 3.76 × 1.25 mm) | Better noise floor for premium audio; requires PCB cutout for bottom acoustic port | Select when SNR >67 dB is required and board layout permits bottom-port placement |
| SPH0641LU4H-1 | I²S output, 65 dB SNR, 3.5 mm × 2.65 mm × 0.98 mm package, no integrated EMI shield | Direct I²S interface reduces host processing overhead; lacks EMI protection in noisy systems | Select when host SoC lacks PDM receiver but includes I²S controller and EMI is not critical |
Compared with IM69D130V54A and SPH0641LU4H-1, the MP34DT05TR-A uniquely balances top-port usability, integrated EMI shielding, and production-ready PDM timing - making it optimal for space-constrained, cost-sensitive voice interfaces where board-level shielding is impractical.
Availability
MP34DT05TR-A is available at Aetrix Electronics and suitable for mobile terminals, VoIP handsets, and speech recognition systems requiring stable component supply, extended temperature resilience, and PDM interface compatibility.
Supply support for MP34DT05TR-A 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, MEMS, power, and microcontroller products for industrial, automotive, and consumer markets.
The MP34DT05TR-A belongs to ST's MEMS audio sensor product line, engineered specifically for ultra-low-power, high-fidelity digital voice capture in miniaturized portable and embedded systems.
FAQ
What is the recommended power supply decoupling for MP34DT05TR-A?
Place a 100 nF ceramic capacitor and a 1 µF ceramic capacitor as close as possible to pin 1 (Vdd), with short traces to minimize inductance. This ensures stable operation during PDM data transitions and suppresses supply noise coupling into the analog MEMS front-end.
How does the L/R pin affect PDM data timing?
When LR = Vdd, valid PDM data appears on DOUT during CLK high; when LR = GND, valid data appears during CLK low. The internal 200 kΩ pull-down allows leaving LR unconnected for default GND behavior, simplifying single-mic designs.
Can MP34DT05TR-A be used in stereo configurations?
Yes - two MP34DT05TR-A units can form a stereo pair: one with LR tied to Vdd (right channel), the other with LR tied to GND (left channel), sharing the same CLK signal. Their matched sensitivity (±3 dB) and identical timing characteristics enable coherent stereo capture.
What is the maximum clock frequency supported for reliable PDM output?
The device supports up to 3.25 MHz input clock frequency with 40–60% duty cycle. At this rate, Tdv remains ≤105 ns (CLOAD = 100 pF), ensuring setup/hold margins for downstream PDM receivers such as STM32L4 or ESP32-S3 digital microphone peripherals.
MP34DT05TR-A 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:
- -
MP34DT05TR-A FAQ
1.How can I place an order for MP34DT05TR-A through Aetrix?
Please submit a Request for Quotation (RFQ) for MP34DT05TR-A 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 MP34DT05TR-A reliable?
The price and inventory of MP34DT05TR-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP34DT05TR-A is usually 5 days.
3.What payment methods are accepted for MP34DT05TR-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP34DT05TR-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP34DT05TR-A?
MP34DT05TR-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP34DT05TR-A 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 MP34DT05TR-A?
For technical support, including MP34DT05TR-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP34DT05TR-A requirements.
6.How does Aetrix verify that MP34DT05TR-A is sourced from the original manufacturer or authorized distributors?
All MP34DT05TR-A 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 MP34DT05TR-A meets industry standards.
7.What is the process for return or replacement of MP34DT05TR-A?
All MP34DT05TR-A units undergo pre-shipment inspection (PSI). If there is an issue with MP34DT05TR-A, 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 MP34DT05TR-A part is unused and in its original packaging.
Return procedure for MP34DT05TR-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP34DT05TR-A Tags
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