HA12226F Datasheet, PDF (11/86 Pages) Hitachi Semiconductor – Audio Signal Processor for Cassette Deck(Dolby B-type NR with Recording System)

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.
Lo
Mid
15, 16, 17, 18, 20, −0.2 to 1.0 
22, 23*⁴, 25
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 V_CC
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: V_CC,
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
ALC
25.5mVrms
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