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 SPL

Signal-to-Noise Ratio of 64dB(A)

20-20kHz flat frequency response

High drive capability

Low current consumption of 230μA in low-power mode

RF shielded

PDM output

Supports dual multiplexed channels

Ultra-stable performance

Standard SMD reflow

Omnidirectional

Sensitivity matching

Standard 4 x 3 x 1 package size

LGA package

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 electronics

Cellphones

Laptop computers

Tablets

Digital still cameras

Portable music recorders 

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