BU8332CKV-M Datasheet, PDF (20/29 Pages) Rohm – Directional Microphone Function

BU8332CKV-M
Application Example
4.7μ 0.1μ
4.7μ 0.1μ
1μ
1μ
4.7μ 0.1μ
4.7μ 0.1μ
56n
BGFLT
0.1μ
220
47μ
220
47μ
MICBIAS1
MICBIAS2
2k
2k
MIC1INP
1μ
MIC1INN
1μ
MIC2INP
1μ
MIC2INN
1μ
TMODE0
TMODE1
TMODE2
TMODE3
Open
BU8332CKV-M
MCLK
CERALOCK(4MHz)
CSTCR4M00G55B-R0
1M
470
XTLO
LINEOUT
PCMCLK
PCMFS
PCMIN
PCMOUT
RSTB
2.2k
2.2k
SCL
SDA
Figure 33 Application Circuit
Application circuit above shows line output. Please follow Timing Chart described earlier. DVDDIO should be selected
depending on I/O interface voltage level requirement, without exceeding the maximum specification. PCM output may be used if
required. An EEPROM may be connected to SPI BUS pins to load register values automatically upon reset.
Circuit constant should be selected one that tolerance is within 10%. Resistor for microphone bias should be decided by actual
microphone specification. Also circuit elements around oscillator circuit should be estimated based on matching evaluation for
each actual board.
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TSZ22111・15・001
20/26
TSZ02201-0V1V0C104570-1-2
2014.10.31 Rev.002