STMicroelectronics MP23DB02MMTR

Overview

MP23DB02MMTR from STMicroelectronics is an ultracompact, bottom-port, omnidirectional digital MEMS microphone with PDM output, integrated capacitive sensing element and CMOS interface IC. It delivers –26 dBFS ±1 dB sensitivity, 122 dBSPL acoustic overload point, and operates across –40°C to +85°C. Its triple-mode operation (sleep/low-power/normal) enables use in always-on voice interfaces for mobile and wearable systems.

For engineers reviewing the MP23DB02MMTR datasheet, MP23DB02MMTR pinout, MP23DB02MMTR application, or MP23DB02MMTR equivalent, key selection criteria include PDM stereo configuration capability, 2 μA sleep current, RHLGA-5L package compatibility, and guaranteed SNR ≥64 dB(A) across operating modes.

Technical Context

The MP23DB02MMTR implements a silicon micromachined capacitive transducer coupled with a dedicated CMOS interface that outputs single-bit PDM data synchronized to an external clock (0.15–3.3 MHz). Channel selection (left/right) is controlled via the L/R pin, which defaults to GND through a 200 kΩ internal pull-down.

Timing behavior is defined by clock-driven wake-up (20 ms), DOUT valid delay (120 ns), and high-Z transition (4–17 ns). Acoustic performance is maintained across modes: SNR remains ≥64 dB(A), THD ≤0.5% at 94 dBSPL, and PSR reaches –90 dBFS at 217 Hz.

Key Specifications

Pinout & Package

RHLGA-5L package: 3.5 mm × 2.65 mm × 0.98 mm, bottom-port, EMI-shielded, RoHS and ECOPACK compliant, SMD-mountable with metal cap.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital MEMS microphone applications.

Compared with ICS-43434 and INMP522, the MP23DB02MMTR uniquely combines triple-mode power control, bottom-port ruggedness, and guaranteed 64+ dB(A) SNR across all modes - making it optimal for next-gen portable devices demanding both acoustic fidelity and energy efficiency.

Availability

MP23DB02MMTR is available at Aetrix Electronics and suitable for smartphones, laptops, and wearable devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MP23DB02MMTR 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 management ICs, and analog/mixed-signal products for automotive, industrial, and consumer markets.

The MP23DB02MMTR belongs to ST's high-performance MEMS audio sensor family, engineered specifically for ultra-low-power, high-SNR voice capture in space-constrained portable electronics with stringent EMI and reliability requirements.

FAQ

What clock frequencies enable each operating mode of the MP23DB02MMTR?

The MP23DB02MMTR uses clock frequency to determine operational mode: power-down mode activates at 0–0.15 MHz, low-power mode at 0.54–1.1 MHz, and normal mode at 1.5–3.3 MHz. Mode transitions require the clock to be either continuous or stopped for ≥50 μs to ensure stable internal state reset and avoid data corruption on DOUT.

How is stereo configuration implemented using the L/R pin?

Stereo operation is achieved by connecting the L/R pin to either VDD (for right-channel data on DOUT during CLK high) or GND (for left-channel data during CLK low), per Table 7 in DS13521. The internal 200 kΩ pull-down means leaving L/R unconnected defaults to left-channel output, simplifying single-mic designs.

What decoupling capacitors are required for stable MP23DB02MMTR operation?

ST recommends placing a 100 nF ceramic capacitor and a 1 µF ceramic capacitor as close as possible to the VDD and GND pins (pins 5 and 3). This dual-capacitor network suppresses high-frequency switching noise and low-frequency supply droop, ensuring stable PDM output and preventing SNR degradation or mode instability.

Does the MP23DB02MMTR require external biasing or calibration components?

No external biasing, resistors, or calibration components are needed. The MP23DB02MMTR integrates a complete signal chain - capacitive transducer, CMOS interface, voltage regulator, and digital output driver - and is factory calibrated for sensitivity (±1 dB tolerance) and AOP (122 dBSPL), enabling direct connection to PDM-capable processors.