SPK0838HT4H-B

SPK0838HT4H-B Datasheet

SPK0838HT4H-B

Part	Datasheet
SPK0838HT4H-B	SPK0838HT4H-B (pdf)

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SPK0838HT4H-B Digital High-SNR SiSonicTM Microphone The SPK0838HT4H-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 SPK0838HT4H-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 audio performance and RF immunity are required. The high Signal-to-Noise-Ratio SNR of the SPK0838HT4H-B enhances the performance of far-field applications and many complex, multi-microphone algorithms. Features x High Signal to Noise Ration of 64dB A x Flat Frequency Response up to 20kHz x Low Current x RF Shielded x PDM Output x Supports Dual Multiplexed Channels x Ultra-Stable Performance x Standard SMD Reflow x Omnidirectional 2/21/2014 Knowles Electronics SPK0838HT4H-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 grounded, no load, unless otherwise indicated Parameter Supply Voltage1 Supply Current2 Supply Current1,2 Symbol VDD IDD Conditions VDD = 1.8V VDD = 3.6V Max Units Sleep Current ISLEEP Sleep Current1 ISLEEP Sensitivity1 S FCLOCK < 1 kHz, VDD = 1.8V FCLOCK < 1 kHz, VDD = 3.6V 94 dB SPL 1 kHz -23 dBFS Signal to Noise Ratio SNR 94 dB SPL 1 kHz, A-weighted Total Harmonic Distortion 94 dB SPL 1 kHz, S = Typ Acoustic Overload Point 10% THD 1 kHz, S = Typ, VDD = 3.6V Power Supply Rejection Ratio PSRR 200 mVpp sinewave 1 kHz dB SPL dBFS /V Power Supply Rejection PSR+N 100 mVpp square wave 217 Hz, A-weighted dBFS A DC Output Fullscale = ±100

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SPK0838HT4H-B

Digital High-SNR SiSonicTM Microphone

The SPK0838HT4H-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 SPK0838HT4H-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 audio performance and RF immunity are required. The high Signal-to-Noise-Ratio SNR of the SPK0838HT4H-B enhances the performance of far-field applications and many complex, multi-microphone algorithms.

Features x High Signal to Noise Ration of 64dB A x Flat Frequency Response up to 20kHz x Low Current x RF Shielded x PDM Output x Supports Dual Multiplexed Channels x Ultra-Stable Performance x Standard SMD Reflow x Omnidirectional
2/21/2014 Knowles Electronics

SPK0838HT4H-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 grounded, no load, unless otherwise indicated

Parameter Supply Voltage1 Supply Current2 Supply Current1,2

Symbol VDD IDD

Conditions

VDD = 1.8V VDD = 3.6V

Max Units

Sleep Current ISLEEP Sleep Current1 ISLEEP

Sensitivity1 S

FCLOCK < 1 kHz, VDD = 1.8V FCLOCK < 1 kHz, VDD = 3.6V
94 dB SPL 1 kHz
-23 dBFS

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

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

Acoustic Overload Point
10% THD 1 kHz, S = Typ, VDD = 3.6V

Power Supply Rejection Ratio

PSRR
200 mVpp sinewave 1 kHz
dB SPL
dBFS /V

Power Supply Rejection

PSR+N
100 mVpp square wave 217 Hz, A-weighted
dBFS A

DC Output

Fullscale = ±100

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Datasheet ID: SPK0838HT4H-B 644969