BU8332CKV-M Datasheet, PDF (8/29 Pages) Rohm – Directional Microphone Function

BU8332CKV-M
◆Transmit / Receive analog block
Application Circuit (Figure 33), Ta=25℃, AVDD=3.3V, PLLVDD=3.3V, REGON=”H”, f=1kHz unless otherwise specified.
Parameter
Symbol
Limits
Unit
Min
Typ
Max
Conditions
Minimum load resistance
RALRT
600
-
-
Ω Measurement Pin:LINEOUT
Maximum load capacitance
CALRX
-
-
50
pF Measurement Pin:LINEOUT
Maximum output level
VAORX
1.9
-
-
Vpp Measurement Pin:LINEOUT
Volume gain setting range
MIC1/MIC2
GTVOL
-20
-
30
dB
Measurement Path:
MICIN → PCMOUT
Volume step width
MIC1/MIC2
GTSTEP
-
2
-
dB
Measurement Path:
MICIN → PCMOUT
Volume gain setting range
Measurement Path:
LINEOUT
GRVOL
-25
-
16
dB
MICIN → LINEOUT
Volume step width
LINEOUT
GRSTEP
-
1
-
dB
Measurement Path:
MICIN → LINEOUT
◆Reference
Application Circuit (Figure 33), Ta=25℃, AVDD=3.3V, PLLVDD=3.3V, REGON=”H” unless otherwise specified.
Parameter
Symbol
Limits
Unit
Min
Typ
Max
Conditions
Output voltage
VAG
0.45*
AVDD
0.5*
AVDD
0.55*
AVDD
V
Measurement Pin:
COMIN, COMOUT
RSTB=“L”→”H” 90%attainment
Rise time *4
TAG
-
-
15
ms time
COMIN=1μF, COMOUT=1μF
*4 Rise time is affected to power supply, COMIN capacitance, and process. Please, have sufficient margin when value determination.
◆Microphone BIAS (MICBIAS)
Application Circuit (Figure 33), Ta=25℃, AVDD=3.3V, PLLVDD=3.3V, REGON=”H”, f=1kHz unless otherwise specified.
Parameter
Symbol
Limits
Unit
Min
Typ
Max
Conditions
Measurement Pin:
MICBIAS output voltage
VMICB
2.2
2.5
2.8
V
MICBIAS1, MICBIAS2
lload=1mA
Measurement Pin:
MICBIAS output noise
VNOMICB
-
-95
-80
dBV
MICBIAS1, MICBIAS2
RL=2kΩ Using filter:A-Weight
Measurement Pin:
PSRR
PSRMICB
40
-
-
dB
MICBIAS1, MICBIAS2
Using filter:1kHz BPF
GMIC=0dB, Vrippl=100mVpp
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TSZ22111・15・001
8/26
TSZ02201-0V1V0C104570-1-2
2014.10.31 Rev.002