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PDF HA12229F Data sheet ( Hoja de datos )
| Número de pieza | HA12229F | |
| Descripción | Audio Signal Processor for Car Deck(Decode only Dolby B-type NR with PB Amp.) | |
| Fabricantes | Hitachi Semiconductor | |
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HA12228F/HA12229F
Audio Signal Processor for Car Deck
(Decode only Dolby B-type NR* with PB Amp.)
ADE-207-325A
2nd Edition
Dec. 2000
Description
HA12228F/HA12229F are silicon monolithic bipolar IC providing Dolby noise reduction system*, music
sensor, PB equalizer system in one chip.
Notes: 1. Dolby is a trademark of Dolby Laboratories Licensing Corporation.
A license from Dolby Laboratories Licensing Corporation is required for the use of this IC.
2. HA12229F is not built-in Dolby B-NR.
Functions
• PB equalizer
• Music sensor
• Dolby B-NR (Only HA12228F)
• Line mute SW
× 2 channel
× 1 channel
× 2 channel
× 2 channel
Features
• Different type of PB equalizer characteristics selection (120 µs/70 µs) is available with fully electronic
control switching built-in.
• Easy interface with the PB head. (The PB-EQ resistance self-containing)
• Changeable to Forward, Reverse-mode for PB head with fully electronic control switching built-in.
• Available to change music sensing level by external resistor.
• Available to change response of music sensor by external capacitor.
• Music sensing level, built-in switch to change a band (MSGV).
• NR ON/OFF fully electronic control switching built-in. (Only HA12228F)
• Line mute control switching built-in.
• Available to connect direct with MPU.
• These ICs are strong for a cellular phone noise.
1 page  
HA12228F/HA12229F
Pin Description, Equivalent Circuit (VCC = 9 V single supply, Ta = 25°C, No Signal,
The value in the table shows typical value.) (cont.)
Pin No. Terminal Name Note
20 MUTE ON/OFF —
Equivalent Circuit
Description
Mode control input
21 *1
19
17
18
16
NR ON/OFF
120/70
F/R
S/R(MS G )
V
MSOUT
—
22 k
100 k
GND
VCC
I
MS output (to MPU) *2
10 MS Gv(S)
V = VCC/2
11 MS Gv(R)
31 NFI(R)
V = VCC/2
200 100 k
GND
V
90 k
MS gain terminal *2
VCC Equalizer output for
time constant
V
40 NFI(L)
Notes: 1. Non connection regarding HA12229F.
2. MS: Music Sensor
to Vref
Rev.2, Dec. 2000, page 5 of 51
5 Page 
HA12228F/HA12229F
Table 3 Switching Truth Table
Pin No.
Pin Name
Lo
Hi
17
Forward/Reverse
Forward
Reverse
18
Search/Repeat
Search (FF or REV)
Repeat (Normal speed)
19
120 µ/70 µ
70 µ (Metal or Chrome) 120 µ (Normal)
20
MUTE ON/OFF
MUTE-OFF
MUTE-ON
21*
NR ON/OFF
NR-OFF
NR-ON
Notes: * Non connection regarding HA12229F.
1. Each pins are on pulled down with 100 kΩ internal resistor.
Therefore, it will be low-level when each pins are open.
2. Over shoot level and under shoot level of input signal must be the standardized.
(High: VCC, Low: –0.2 V)
3. Reducing pop noise is so much better for 10 kΩ to 22 kΩ resisitor and 1 µF to 22 µF capacitor
shown figure 2.
Input Pin 10 to 22kΩ
+ 1 to 22µF
MPU
Figure 2 Interface for Reduction of Pop Noise
Rev.2, Dec. 2000, page 11 of 51
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HA12229F.PDF ] | |
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