SPM1437HM4H-B

SPM1437HM4H-B Datasheet

SPM1437HM4H-B

Part	Datasheet
SPM1437HM4H-B	SPM1437HM4H-B (pdf)

PDF Datasheet Preview
SPM1437HM4H-B Digital SiSonicTM Microphone The SPM1437HM4H-B is a miniature, highperformance, low power, top port silicon digital microphone with a single bit PDM output. Using Knowles’ proven high performance SiSonicTM MEMS technology, the SPM1437HM4H-B consists of an acoustic sensor, a low noise input buffer, and a sigma-delta modulator. These devices are suitable for applications such as cellphones, smart phones, laptop computers, sensors, digital still cameras, portable music recorders, and other portable electronic devices where excellent wideband audio performance and RF immunity are required. Features • High Sensitivity • Low Current • RF Shielded • PDM Output • Ultra-Stable Performance • Standard SMD Reflow • Omnidirectional 11/12/2013 Knowles Electronics SPM1437HM4H-B ABSOLUTE MAXIMUM RATINGS Parameter VDD, DATA to Ground CLOCK to Ground SELECT to Ground Input Current Short Circuit Current to/from DATA Temperature Range Absolute Maximum Rating ±5 Indefinite to Ground or VDD -40 to +100 Units V mA sec °C Stresses exceeding these “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only. Functional operation at these or any other conditions beyond those indicated under “Acoustic & Electrical Specifications” is not implied. Exposure beyond those indicated under “Acoustic & Electrical Specifications” for extended periods may affect device reliability. ACOUSTIC & ELECTRICAL SPECIFICATIONS TEST CONDITIONS 23 ±2°C, 55±20% R.H., VDD=1.8 V, FCLOCK=2.4 MHz, SELECT pin is grounded, no load, unless otherwise indicated Parameter Conditions Max Units Supply Voltage1 VDD Supply Current1,2,3 Sleep Current3 ISLEEP Sensitivity1 FCLOCK < 1 kHz 94 dB SPL 1 kHz -19 dBFS Signal to Noise Ratio SNR 94 dB SPL 1 kHz, A-weighted 60 Total Harmonic Distortion 94 dB SPL 1 kHz, S = Typ Acoustic Overload Point 10% THD 1 kHz, S = Typ dB SPL Power Supply Rejection Ratio PSRR 200 mVpp sinewave 1 kHz dBV /FS Power Supply Rejection 100 mVpp square wave 217 Hz, A-weighted dBFS A DC Output Fullscale = ±100 Directivity Omnidirectional

PDF Datasheet Preview

SPM1437HM4H-B

Digital SiSonicTM Microphone

The SPM1437HM4H-B is a miniature, highperformance, low power, top port silicon digital microphone with a single bit PDM output. Using Knowles’ proven high performance SiSonicTM MEMS technology, the SPM1437HM4H-B consists of an acoustic sensor, a low noise input buffer, and a sigma-delta modulator. These devices are suitable for applications such as cellphones, smart phones, laptop computers, sensors, digital still cameras, portable music recorders, and other portable electronic devices where excellent wideband audio performance and RF immunity are required.

Features
• High Sensitivity
• Low Current
• RF Shielded
• PDM Output
• Ultra-Stable Performance
• Standard SMD Reflow
• Omnidirectional
11/12/2013 Knowles Electronics

SPM1437HM4H-B

ABSOLUTE MAXIMUM RATINGS

Parameter VDD, DATA to Ground CLOCK to Ground SELECT to Ground Input Current

Short Circuit Current to/from DATA Temperature Range

Absolute Maximum Rating ±5

Indefinite to Ground or VDD -40 to +100

Units V mA sec °C

Stresses exceeding these “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only. Functional operation at these or any other conditions beyond those indicated under “Acoustic & Electrical Specifications” is not implied. Exposure beyond those indicated under “Acoustic & Electrical Specifications” for extended periods may affect device reliability.

ACOUSTIC & ELECTRICAL SPECIFICATIONS

TEST CONDITIONS 23 ±2°C, 55±20% R.H., VDD=1.8 V, FCLOCK=2.4 MHz, SELECT pin is grounded, no load, unless otherwise indicated

Parameter

Conditions

Max Units

Supply Voltage1 VDD

Supply Current1,2,3

Sleep Current3 ISLEEP

Sensitivity1

FCLOCK < 1 kHz 94 dB SPL 1 kHz
-19 dBFS

Signal to Noise Ratio SNR 94 dB SPL 1 kHz, A-weighted 60

Total Harmonic Distortion
94 dB SPL 1 kHz, S = Typ

Acoustic Overload Point
10% THD 1 kHz, S = Typ
dB SPL

Power Supply Rejection Ratio

PSRR
200 mVpp sinewave 1 kHz
dBV /FS

Power Supply Rejection
100 mVpp square wave 217 Hz, A-weighted
dBFS A

DC Output

Fullscale = ±100

Directivity

Omnidirectional

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Datasheet ID: SPM1437HM4H-B 644988