Knowles Ramis-B Digital SiSonic™ Microphones
Knowles Ramis-B Digital SiSonic™ Microphones with Multiple Performance Modes are high-performance, low power silicon digital mics with a single-bit PDM output. Knowles SPK0838HT4H-1 microphones consist of an acoustic sensor, a low noise input buffer, and a sigma-delta modulator. The high Signal-to-Noise Ratio (SNR) of the Ramis-B series enhances the performance of far-field applications and many complex, multi-microphone algorithms. This Knowles microphone series offers multiple performance modes.
Features
Low distortion of 2.9% at 115dB SPLSignal-to-Noise Ratio of 64dB(A)20-20kHz flat frequency responseHigh drive capabilityLow current consumption of 230µA in low-power modeRF shieldedPDM output
Specifications
-0.3V, +5.0V VDD to Ground-0.3V, +5.0V DATA, CLOCK, SELECT to Ground±5mA input current-40°C to +100°C operating temperature range
Applications
Portable electronicsCellphonesLaptop computersTabletsDigital still camerasPortable music recorders
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