This IC is designed to operate on single supply, shown by table 1.
Table 1Spply Voltage
ItemPower Supply Range
Single Supply9.5V to 15.0V
Reference Voltage
So little is the current drivability of AC refer ence (Vr ef) that the Vref voltage may be altered by A/B
switching of PB-EQ.
Provided it causes you anxiety, please use the constant 1/2 V
In addition, this IC has a capacitor charger for Vref pin.
V
CC
1
470Ω
30
GND
7
Vref
+
470µF
Figure 1 Reference Voltage Circuit
voltage circuit, for example, figure 1.
CC
Lch PB-EQ reference voltage
Lch REC-EQ reference voltage
Rch REC-EQ reference voltage
Rch PB-EQ reference voltage
Rev.2, Jun. 1997, page 7 of 34
Page 8
HA12211NT
Operating Mode Control
This IC provides fully electronic switching circuits. And each operating mode control is controlled by
parallel data (DC voltage).
Table 2Threshold Voltage (Vth)
Pin No.LoMidHiUnitTest Condition
20, 21, 22, 230.0 to 2.5—4.0 to V
CC
V
Input PinMeasure
V
240.0 to 1.02.0 to 3.04.0 to V
CC
V
Note:1. 20 to 23 pins are pulled down Lo level, and 24 pin is pulled to Mid level by the inside resistor
100kΩ.
2. Over shoot level and under shoot level of input signal must be the standardi ze d.
(High: V
, Low: –0.2V)
CC
Block Diagram
This IC can be constructed for simple system which has little external parts by used the head serving both
as Recording and Play back because of REC return SW built-in.
With output Hi-Z of REC-EQ and input muting, this IC is realized not only REC mute attenuation
sufficiently but reducing pop noise in REC muting.
Note: Referring to Parallel Data Format also.
C9
Tape IN
29
C11
AUX IN
27
19
PBOUT
+
–
B head
A head
RECOUT
R1
PB IN (B)
PB IN (A)
2
4
5
8
Hi-Z SW
RETURN SW
B
A
–
REC - EQ
+
+
–
Vref
Rev.2, Jun. 1997, page 8 of 34
1012
R7C7
Figure 2 Block Diagram (Lch)
14
17
Normal Speed
Normal Tape
PB - A, Tape IN Select
R18
R9
Page 9
HA12211NT
Level Diagram
It is the target that total play back output level is adjusted to 3 00mV; Dolby level, which the PB system
gain in all is included of external amplifier’s (Dolby IC etc.) as follows figure 3. Though A head
adjustment is independent of B, select the value of R9, R18 adequately.
Regarding REC-EQ adjust the gain in front of input to this IC.
The level diagram at 1kHz is shown by figure 4.
Note: 1. R1 needs the valu e mor e than 1kHz.
2. Depending on the employed REC/PB head and test tape characteristics, there is rare case that
the REC-EQ frequency characteristics of this IC can not be matched to the required
characteristics because of built-in resistors which determined the REC-EQ parameters in this
case, please inquire the responsible agent because of the adjustment of built-in resistors is
necessary.
300mV
(Dolby Level)
23.9mV
HA12134A
11.3mV
0.6mV
100kΩ
25.5dB 0 to 20.8dB20dB
+
–
10kΩ
100kΩ VR
VR = 11kΩ
Dolby IC
Figure 3 PB Level Diagram (Normal Speed, Normal Tape, 1kHz)
Rev.2, Jun. 1997, page 9 of 34
Page 10
HA12211NT
REC-EQ clip level
1.8V
300mV
(Dolby Level)
100mV
1kHz
Dolby IC
263mV
REC-EQ
Figure 4 REC Level Diagram (Normal Speed, Normal Tape, 1kHz)
5.6kΩ
R1
Rev.2, Jun. 1997, page 10 of 34
Page 11
HA12211NT
Absolute Maximum Rating (Ta = 25°C)
ItemSymbolRatingUnitNote
Max supply voltageV
Power dissipationP
Operating temperatureTopr–40 to +75°C
Storage temperatureTstg–55 to +125°C
Operating voltageVopr9.5 to 15V
max16V
CC
d
500mWTa ≤ 75°C
Rev.2, Jun. 1997, page 11 of 34
Page 12
HA12211NT
Electrical Characteristics (Ta = 25°C, VCC = 10.5V, Vref = 5.25V, PB-EQ standard DC
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third party’s rights, including
intellectual property rights, in connection with u se of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without
written approval from Hitachi.
7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
Sales Offices
Hitachi, Ltd.
Semiconductor & Integrated Circuits.
Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan
Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109
Hitachi Semiconductor
(America) Inc.
179 East Tasman Drive,
San Jose,CA 95134
Tel: <1> (408) 433-1990
Fax: <1>(408) 433-0223
Europe: http://www.hitachi-eu.com/hel/ecg
Asia : http://sicapac.hitachi-asia.com
Japan: http://www.hitachi.co.jp/Sicd/indx.htm
Hitachi Europe GmbH
Electronic Components Group
Dornacher Straße 3
D-85622 Feldkirchen, Munich
Germany
Tel: <49> (89) 9 9180-0
Fax: <49> (89) 9 29 30 00
Hitachi Europe Ltd.
Electronic Components Group.
Whitebrook Park
Lower Cookham Road
Maidenhead
Berkshire SL6 8YA, United Kingdom
Tel: <44> (1628) 585000
Fax: <44> (1628) 585160
Hitachi Asia Ltd.
Hitachi Tower
16 Collyer Quay #20-00,
Singapore 049318
Tel : <65>-538-6533/538-8577
Fax : <65>-538-6933/538-3877
URL : http://www.hitachi.com.sg
Hitachi Asia Ltd.
(Taipei Branch Office)
4/F, No. 167, Tun Hwa North Road,
Hung-Kuo Building,
Taipei (105), Taiwan
Tel : <886>-(2)-2718-3666
Fax : <886>-(2)-2718-8180
Telex : 23222 HAS-TP
URL : http://www.hitachi.com.tw
Copyright Hitachi, Ltd., 2000. All rights reserved. Printed in Japan.
Hitachi Asia (Hong Kong) Ltd.
Group III (Electronic Components)
7/F., North Tower,
World Finance Centre,
Harbour City, Canton Road
Tsim Sha Tsui, Kowloon,
Hong Kong
Tel : <852>-(2)-735-9218
Fax : <852>-(2)-730-0281
URL : http://www.hitachi.com.hk
Colophon 2.0
Rev.2, Jun. 1997, page 34 of 34
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.