MP23DB02HP - MEMS Digital Microphone, PDM Output | STMicroelectronics
料号： MP23DB02HP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.48 | $148.00 |
| 500 | $1.33 | $665.00 |
| 1,000 | $1.2 | $1,200.00 |
MP23DB02HP 概述
A MEMS microphone is a micro-electromechanical system that converts acoustic pressure waves into electrical signals. Unlike traditional electret condenser microphones (ECMs), MEMS microphones are manufactured using semiconductor fabrication techniques, offering higher consistency, smaller size, and better temperature stability. The MP23DB02HP belongs to the category of digital microphones, which integrate an analog-to-digital converter (ADC) and output a PDM stream, simplifying the interface to digital signal processors (DSPs) or microcontrollers. This digital output eliminates the need for external analog front-end components, reducing system complexity and improving noise immunity.
Key features of the MP23DB02HP include a 64 dB SNR, which ensures clear audio capture with low background noise, and a wide frequency response from 20 Hz to 20 kHz, covering the full audible range. The PDM output supports a clock frequency range of 1.2 MHz to 3.6 MHz, allowing flexible interfacing with various audio codecs and processors. The microphone also features a selectable power mode (low-power and high-performance) via the L/R pin, enabling designers to trade off power consumption against performance. Additionally, the device has a high PSRR (power supply rejection ratio) of 80 dB, minimizing the impact of power supply noise on audio quality.
Technically, the MP23DB02HP uses a capacitive sensing element with a dedicated ASIC that includes a preamplifier, ADC, and PDM interface. The MEMS membrane is designed to be highly sensitive while maintaining robustness against mechanical shock and vibration. The device is AEC-Q100 qualified, making it suitable for automotive applications such as in-cabin voice control and hands-free calling. The bottom port configuration allows for a sealed acoustic chamber, which can be optimized for specific frequency response characteristics.
Typical applications include smartphones, smart speakers, hearing aids, and IoT devices where voice interaction and audio recording are essential. The low power consumption and small footprint make it particularly suitable for wearable devices and TWS earbuds. In automotive, it can be used for voice commands and noise cancellation in the cabin.
When designing with the MP23DB02HP, ensure that the PDM clock is provided within the specified range and that the L/R pin is correctly configured to select the desired channel. Proper PCB layout with a dedicated ground plane and decoupling capacitor (100 nF) near the VDD pin is recommended to achieve optimal performance. The acoustic port should be protected from dust and moisture using a mesh or foam cover.
直接替换替代料： MP23DB02HP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
MP23DB01HP
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MP23DB02HPTR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MP23DB02HP 最大额定值与电气特性
| 输出类型 | Digital PDM |
| Signal-to-Noise Ratio (SNR) | 64 dB |
| Sensitivity | -26 dBFS |
| 电源电压 | 1.6 V to 3.6 V |
| Current Consumption | 0.9 mA |
| Frequency Response | 20 Hz to 20 kHz |
| PDM Clock Frequency | 1.2 MHz to 3.6 MHz |
| Power Supply Rejection Ratio (PSRR) | 80 dB |
| 封装 | 4x3x1.08 mm MEMS |
| Port Type | Bottom port |
| 工作温度 | -40C to +85C |
| AEC-Q100 | Qualified |
| RoHS | Compliant |
| REACH | Compliant |
| 安装类型 | Surface Mount |
MP23DB02HP 引脚配置
| 引脚 1 | GND — Ground |
| 引脚 2 | L/R — Channel select (left/right) |
| 引脚 3 | VDD — Power supply |
| 引脚 4 | CLK — PDM clock input |
| 引脚 5 | DATA — PDM data output |
典型应用
MP23DB02HP 适用于 6 应用s: Smartphones and Tablets, TWS Earbuds and Hearables, Smart Speakers and Voice Assistants, Automotive In-Cabin Sensing, IoT and Smart Home Devices, Hearing Aids and Assistive Listening Devices.
Smartphones and Tablets
The MP23DB02HP is used in smartphones and tablets for voice calls, voice assistants, and video recording. Its PDM output simplifies interfacing with application processors, and the low power consumption extends battery life. The 64 dB SNR ensures clear voice capture even in noisy environments, while the small package allows integration into thin devices.
推荐
TWS Earbuds and Hearables
In TWS earbuds, the MP23DB02HP captures voice for calls and voice assistants. Its ultra-low power consumption (0.9 mA) is critical for battery life, and the bottom port allows for a sealed acoustic design. The PDM output reduces the number of wires needed, simplifying the flex PCB design. The AEC-Q100 qualification ensures reliability in demanding environments.
推荐
Smart Speakers and Voice Assistants
The MP23DB02HP is ideal for smart speakers, where multiple microphones are used for far-field voice pickup and beamforming. Its high SNR and PSRR ensure consistent performance, and the PDM output allows easy synchronization of multiple microphones. The small size enables dense microphone arrays in compact enclosures.
推荐
Automotive In-Cabin Sensing
The MP23DB02HP is AEC-Q100 qualified, making it suitable for automotive applications such as hands-free calling, voice control, and road noise cancellation. Its wide temperature range (-40C to +85C) and robust construction ensure reliable operation in harsh automotive environments. The PDM output interfaces directly with automotive audio DSPs.
推荐
IoT and Smart Home Devices
In IoT devices like smart thermostats and security cameras, the MP23DB02HP provides voice control and audio monitoring. Its low power consumption is essential for battery-powered sensors, and the digital output simplifies integration with low-power MCUs. The small package allows for compact product designs.
推荐
Hearing Aids and Assistive Listening Devices
The MP23DB02HP is suitable for hearing aids due to its low power consumption, small size, and digital output. The PDM interface allows direct connection to a DSP, reducing component count. The high SNR ensures clear audio for users, and the bottom port enables a compact acoustic design.
推荐
推荐产品汇总
工程参考数据： MP23DB02HP ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MP23DB01HP | SPH0645LM4H | ICS-43434 |
|---|---|---|---|---|
| Package | 4x3x1.08 mm MEMS | 4x3x1.08 mm MEMS - same | 3.5x2.65x0.98 mm MEMS - different | 3.5x2.65x0.98 mm MEMS - different |
| Brand | STMicroelectronics | STMicroelectronics | Knowles | TDK InvenSense |
| Output Interface | PDM | PDM | PDM | I2S |
| SNR | 64 dB | 63 dB | 61 dB | 65 dB |
| Sensitivity | -26 dBFS | -26 dBFS | -26 dBFS | -26 dBFS |
| Supply Voltage | 1.6V to 3.6V | 1.6V to 3.6V | 1.6V to 3.6V | 1.6V to 3.6V |
| Current Consumption | 0.9 mA | 0.9 mA | 0.6 mA | 1.4 mA |
| AEC-Q100 | Qualified | Qualified | Not qualified | Not qualified |
关键差异点
- AEC-Q100 qualified for automotive use （对比 SPH0645LM4H)
- Higher SNR than MP23DB01HP （对比 MP23DB01HP)
- Lower current consumption than ICS-43434 （对比 ICS-43434)
设计说明
Place a 100 nF decoupling capacitor as close as possible to the VDD pin. Use a solid ground plane under the microphone to minimize noise. The acoustic port should be aligned with a hole in the PCB, and a mesh or foam should be used to protect against dust and moisture.
Keep the PDM clock and data traces short and shielded to avoid crosstalk. Route the clock away from the data line to prevent interference. If multiple microphones are used, ensure the clock signal is distributed with matched trace lengths to maintain synchronization.
Do not exceed the maximum supply voltage of 3.6V. Ensure the PDM clock is within the specified range (1.2 MHz to 3.6 MHz) to avoid data corruption. The L/R pin must be tied to VDD or GND to select the correct channel; floating this pin can cause undefined behavior.
合规信息
RoHS and REACH compliant per STMicroelectronics datasheet. AEC-Q100 qualified for automotive applications.
