T3903
Page 15 of 21
Document Number: DS-000358
Revision: 1.0
the CLK trace on the PCB. Depending on the drive capability of the codec clock output, a buffer may still be needed, as shown in Figure
14.
SLEEP MODE
The microphone enters sleep mode when the clock frequency falls below 200 kHz. In this mode, the microphone data output is in a high
impedance state. The current consumption in sleep mode is 9 µA.
The microphone wakes up from sleep mode and begins to output data 7 ms after the clock becomes active. The wake-up time indicates
the time from when the clock is enabled to when the T3903 outputs data within 0.5 dB of its settled sensitivity.
START-UP TIME
The start-up time of the T3903 is typically 7 ms, measured by the time from when power and clock are enabled until sensitivity of
the output signal is within 0.5 dB of its settled sensitivity.
