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HA12216F View Datasheet(PDF) - Hitachi -> Renesas Electronics

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HA12216F Datasheet PDF : 53 Pages
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HA12216F/HA12221F Series
1. Serch mode
GV1 = 20dB + 20log
1 + 90k
REX2
[dB]
f1 =
1
2π ⋅ CEX2 REX2
[Hz], f2 = 25k [Hz]
2. Repeat mode
GV2 = 20dB + 20log
1 + 90k
REX1
[dB]
f3 =
1
2π ⋅ CEX1 REX1
[Hz], f4 = 25k [Hz]
GVIA: L·R signal addition circuit gain.
The sensitivity of music sensor (S) is computed by the formula mentioned below.
S=
GV*1
20log
130*3
30*2
= 12.7 GV
[dB]
Note: 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
Item
REX1, 2
Search mode 24 k
CEX1, 2
0.01 µF
GV1, 2
33.5 dB
f1, 3
663 Hz
f2, 4
25 kHz
S
(one side
channel)
14.8 dB
S
(both
channel)
20.8 dB
Repeat mode 2.4 k
1 µF
51.7 dB 66.3 Hz 25 kHz
33.0 dB 39.0 dB
Note: S is 6 dB down in case of one-side channel. And this MS presented hysteresis lest MSOUT terminal
should turn over again Hi level or Lo level, in case of thresh S level constantly.
Music Sensor Time Constant
1. Sensing no signal to signal (Attack) is determined by C6, 0.01 µF to 1 µF capacitor C6 can be
applicable.
2. Sensing signal to no signal (Recovery) is determined by C6 and R11, however preceding (1), 100 kto
1 Mcan be applicable.
Music Sensor Output (MSOUT)
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 MSOUTLO*
RL
* MSOUTLO : Sensing signal (about 1V)
Note: 1. Supply voltage of MSOUT pin must be less than VCC voltage.
Rev.6, Dec. 2000, page 12 of 53
 

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