HA12231FP Ver la hoja de datos (PDF) - Renesas Electronics
Número de pieza
componentes Descripción
Fabricante
HA12231FP Datasheet PDF : 23 Pages
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HA12231FP
1. Search mode
GV1 = (23.5dB − 3.5dB) + 20log
1 + 90k
REX2
[dB]
f1 =
1
2π ⋅ CEX2 ⋅ REX2
[Hz], f2 = 25k [Hz]
2. Repeat mode
GV2 = (23.5dB − 3.5dB) + 20log
1 + 90k
REX1
[dB]
f3 =
1
2π ⋅ CEX1 ⋅ REX1
[Hz], f4 = 25k [Hz]
The sensitivity of music sensor (S) is computed by the formula mentioned below.
S = 12.7 − GV [dB]
S is 6 dB down in case of one-side channel.
Notes: 1. Search mode: GV1, Repeat mode: G V2
2. Standard level of TAI pin (Dolby level correspondence) = 30 mVrms
3. Standard sensing level of music sensor = 130 mVrms
S
S
(one side
(both
Item
REX1, 2
CEX1, 2
GV1, 2
f1, 3
f2, 4
channel)
channel)
Search mode 24 kΩ
0.01 µF
33.5 dB
663 Hz
25 kHz
−14.8 dB
−20.8 dB
Repeat mode 2.4 kΩ
1 µF
51.7 dB
66.3 Hz
25 kHz
−33.0 dB
−39.0 dB
Note: This MS presented hysteresis lest MS(OUT) terminal should turn over again High level or Low level, in case of
thresh S level constantly.
Music Sensor Time Constant
1. Sensing no signal to signal (Attack) is determined by C1, 0.01 µF to 1 µF capacitor C1 can be applicable.
2. Sensing signal to no signal (Recovery) is determined by C1 and R1, however preceding (1), 100 kΩ to
1 MΩ can be applicable.
Music Sensor Output (MS(OUT))
As for the internal circuit of music sensor block, music sensor output pin is connected to the collector of NPN type
directly, therefore, output level will be "high" when sensing no signal. And output level will be "low" when sensing
signal.
IL =
DVCC − MS(OUT)LO*
RL
* MS(OUT)LO : Sensing signal (about 1V)
Note: Supply voltage of MS (OUT) pin must be less than VCC voltage.
Rev.2.00 Jun 15, 2005 page 10 of 22
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