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PDF HA12226 Data sheet ( Hoja de datos )
| Número de pieza | HA12226 | |
| Descripción | Audio Signal Processor for Cassette Deck(Dolby B-type NR with Recording System) | |
| Fabricantes | Hitachi Semiconductor | |
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HA12226F/HA12227F
Audio Signal Processor for Cassette Deck
(Dolby B-type NR with Recording System)
ADE-207-270E (Z)
6th Edition
Dec. 2000
Description
The HA12226F/HA12227F are silicon monolithic bipolar IC providing Dolby noise reduction system*1,
music sensor system, REC equalizer system and each electronic control switch in one chip.
Note: 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.
The HA12227F is not built-in Dolby B-NR.
Functions
• Dolby B-NR*2 × 2 channel
• REC equalizer × 2 channel
• Music sensor × 1 channel
• Pass amp.
× 2 channel
• Each electronic control switch to change REC equalizer, bias, etc.
Note: 2. The HA12227F is not built-in Dolby B-NR.
Features
• REC equalizer is very small number of external parts and have 4 types of frequency characteristics
built-in.
• 2 types of input for PB, 1 type of input for REC.
• 70µ - PB equalizer changing system built-in.
• Dolby NR*2 with dubbing double cassette decks.
Unprocessed signal output available from recording out terminals during PB mode.
• Provide stable music sensor system, available to design music sensing time and level.
• Controllable from direct micro-computer output.
• Bias oscillator control switch built-in.
• NR ON / OFF and REC / PB fully electronic control switching built-in.
• Normal-speed / high-speed, Normal / Crom and PB equalizer fully electronic control switching built-in.
• Available to reduce substrate-area because of high integration and small external parts.
1 page  
HA12226F/HA12227F
Pin Description, Equivalent Circuit (VCC = 12 V, A system of single supply voltage,
Ta = 25°C, No Signal, The value in the show typical value.) (cont)
Pin No.
21
50
31, 45, 54
15
Terminal Name
V
CC
GND
NC
ALC ON/OFF
Note
V=V
CC
V=0V
No connection
I = 20 µA
Equivalent Circuit
Pin Description
Power supply
GND pin
No connection
Mode control input
V
22 k
I
16
17
18
19
20
22
23 *2
25
24
PB A/B
A 120/70
NORM/HIGH
B NORM/CROM
BIAS ON/OFF
RM ON/OFF
NR ON/OFF
LM ON/OFF
REC/PB/PASS
100 k
GND
2.5 V
100 k
+
−
100 k
Mode control input
26 MSOUT I = 0 µA
22 k
V
V VCC
I
MS output (to MPU) *1
D GND
Rev.6, Dec. 2000, page 5 of 86
5 Page 
HA12226F/HA12227F
Operating Mode Control
The HA12226F/HA12227F provide fully electronic switching circuits. And each operating mode control is
controlled by parallel data (DC voltage).
Table 2 Control Voltage
Pin No.
15, 16, 17, 18, 20,
22, 23*4, 25
Lo
−0.2 to 1.0
Mid
Hi
4.0 to V
CC
Unit
V
Test Condition
Input Pin Measure
19, 24
−0.2 to 1.0 2.0 to 3.0
4.0 to VCC
V
Notes: 1. Each pins are on pulled down with 100 kΩ internal resistor.
Therefore, it will be low-level when each pins are open.
But pin 24 is mid-level when it is open.
2. Over shoot level and under shoot level of input signal must be the standardized (High: VCC,
Low: −0.2 V).
3. For reduction of pop noise, connect 1 µF to 22 µF capacitor with mode control pins.
But it is impossible to reduce completely in regard to Line mute, therefore, use external mute at
the same time.
4. Non connection regarding the HA12227F.
Input Block Diagram and Level Diagram
The each level shown above is typical value MS
when offering PBOUT level to PBOUT pin.
REF
300mVrms PASS
PBOUT
REC
580mVrms
PB PASS/REC,
FLAT
PB/REC,
PB=5.7dB/5.7dB
AIN
(120µ)
PASS=0dB/21.4dB 300mVrms
300mVrms
21.3dB
PB
0dB
Dolby *1
RECOUT
BIN 25.9mVrms
R3 70µs
REC
B-NR
300mVrms
12k PASS
300mVrms
R4
15k
25.5mVrms
ALC
C2
4700pF
C1
0.1µF
R1
15k
RIN
200mVrms
R2 C3
2.2k 0.1µF
Note: 1. The HA12227F is not built-in Dolby B-NR.
Figure 2 Input Block Diagram
Rev.6, Dec. 2000, page 11 of 86
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HA12226.PDF ] | |
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