STMicroelectronics MP23DB01HPTR

Overview

MP23DB01HPTR from STMicroelectronics is an ultra-compact, bottom-port, omnidirectional digital MEMS microphone with PDM output, offering 135 dBSPL acoustic overload point in performance mode, –41 dBFS ±1 dB sensitivity, and selectable stereo configuration via L/R pin. It operates across –40 °C to +85 °C and supports sleep (2 µA), low-power (285 µA), and performance (800 µA @ 2.4 MHz) modes for voice capture in space-constrained portable devices.

For engineers reviewing the MP23DB01HPTR datasheet, MP23DB01HPTR pinout, MP23DB01HPTR application, or MP23DB01HPTR equivalent, key selection criteria include AOP vs. SNR trade-offs across clock-driven modes, PDM timing compliance (Tdv = 120 ns), EMI-shielded RHLGA package integration, and L/R channel selection logic for mono/stereo routing.

Technical Context

The MP23DB01HPTR integrates a silicon micromachined capacitive sensing element with a CMOS interface IC to deliver single-bit PDM output synchronized to an external clock (0.15–3.3 MHz). Its three operational modes are controlled solely by input clock frequency range, with no dedicated control pins beyond CLK, DOUT, L/R, VDD, and GND.

Channel selection is implemented via the L/R pin: tied to GND for left-channel data on CLK high, or to VDD for right-channel data on CLK high - enabling hardware-configured stereo without I²C/SPI. The device features internal EMI shielding, A-weighted SNR of 65 dB(A) in performance mode, and PSR of –95 dBFS at 217 Hz.

Key Specifications

Pinout & Package

RHLGA-5L package: 3.5 × 2.65 × 0.98 mm, bottom-port, EMI-shielded metal cap, RoHS/ECOPACK® compliant, SMD-reflow compatible per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICS-43432 and INMP522, the MP23DB01HPTR uniquely combines clock-defined multi-mode operation, hardware L/R stereo routing, and industry-leading 135 dBSPL AOP - making it optimal for battery-powered, space-constrained voice interfaces where deterministic timing and acoustic headroom are non-negotiable.

Availability

MP23DB01HPTR is available at Aetrix Electronics and suitable for smart speakers, TWS earbuds, and wearable health monitors requiring stable component supply, EMI-robust audio capture, and extended temperature operation.

Supply support for MP23DB01HPTR 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 products for industrial, automotive, and consumer markets.

The MP23DB01HPTR belongs to ST's high-performance MEMS audio sensor family, engineered specifically for always-on, low-power voice interfaces in next-generation portable and IoT devices demanding acoustic fidelity, miniaturization, and robust EMI immunity.

FAQ

What clock frequencies enable each operating mode?

The MP23DB01HPTR uses clock frequency to determine mode: 0–0.15 MHz for power-down (2 µA), 0.54–1.1 MHz for low-power (285 µA), and 1.5–3.3 MHz for performance (800–880 µA). Mode transitions require clock stop ≥50 µs or continuous clock; no command register is involved.

How is stereo configuration implemented without I²C or SPI?

Stereo is hardware-configured using the L/R pin: tie to GND for left-channel data on CLK high, or to VDD for right-channel data on CLK high. The internal 200 kΩ pull-down means GND connection is optional for left mode, reducing BOM count and routing complexity.

Does the RHLGA package require special PCB layout considerations?

Yes - the metal cap must be soldered to a solid ground plane via the exposed ground ring (Pin 3); the bottom acoustic port requires a 1.0 mm diameter unmasked aperture aligned beneath the package; and 100 nF + 1 µF decoupling caps must be placed within 2 mm of Pin 5 (VDD) per ST layout guidelines.

What is the wake-up time from power-down to valid PDM output?

Wake-up time is 20 ms - defined as the interval from the first CLK edge after power-down exit to the appearance of valid data on DOUT. This is a design-specified parameter (not typical), ensuring predictable latency for voice-triggered systems.