ICs for VCR
1
AN3328S
2-head recording and playback amplifier IC (A2) for HiFi VCR
s
Overview
The AN3328S is a 2-head recording and play-
back amplifier IC for HiFi audio, and realized
reduction of pin numbers. The package is a small
outline of 16 pins, 1.27 mm pitch and supply volt-
age is 5 V of single supply.
s
Features
Damping-less amp. in playback system
No adjustment of recording current by AGC
3-step switchover of recording current level with
the current emphasis switch (typ.
1.8 dB)
s
Applications
HiFi VCR
SOP016-P-0225C
Unit: mm
s
Block Diagram
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
HA1
HA2
L
H
Det
Curr.
Amp.
AGC
REC / PB select
HSW
CH1 in
GND (small signal)
CH2 in
REC reg2
REC out
REC C
GND
REC reg1
Curr. emph. SW
PB out & REC / mute
REC in
V
CC
REC curr. monitor
10.09
0.20
16
9
1
8
(0.60)
0.40
0.10
Seating plane
Seating plane
4.30
0.20
6.40
0.30
1.50
0.20
0.10
0.10
0.65
0.10
0.65
0.10
1.27
+
0.10
0.15
-
0.05
0
to 10
0.50
0.20
AN3328S
ICs for VCR
2
Pin No.
Description
1
Audio head SW
2
REC regulator1
3
Head amp. input ch.1
4
GND (small signal)
5
Head amp. input ch.2
6
REC regulator2
7
REC out
8
Curr. emph. SW
Pin No.
Description
9
REC curr. monitor (control)
10
V
CC
11
REC AGC det
12
GND
13
REC input
14
PB out & REC / mute SW
15
REC C
16
REC/PB select SW
s
Pin Descriptions
Parameter
Symbol
Rating
Unit
Supply voltage
V
CC
6
V
Supply current
I
CC
mA
Power dissipation
*2
P
D
240
mW
Operating ambient temperature
*1
T
opr
-20 to +70
C
Storage temperature
*1
T
stg
-55 to +125
C
Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for T
a
=
25
C.
*2: The power dissipation shown is for the IC package in free air at T
a
=
70
C.
s
Absolute Maximum Ratings
Parameter
Symbol
Range
Unit
Supply voltage
V
CC
4.5 to 5.5
V
s
Recommended Operating Range
ICs for VCR
AN3328S
3
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
REC
I
10(REC)
V
CC
=
5.0 V
56
(66)
76
mA
Circuit current
REC / PB SW: High
REC
I
7
V
CC
=
5.0 V
44
(48)
52
mA[p-p]
AGC level
REC / PB SW: High
REC
DI
7
V
CC
=
5.0 V
(0.2)
1.0
dB
AGC control characteristics
REC / PB SW: High
REC Recording current
D
7
V
CC
=
5.0 V, REC / PB SW: High
(
-
43)
-
35
dB
2nd harmonic distortion
V
IN
=
260 mV[p-p], 2 MHz
REC
V
16H
V
CC
=
5.0 V, REC / Mute SW: Low
3.6
Vcc
V
Mode hold voltage
V
IN
=
260 mV[p-p], 2 MHz
REC
V
8L
V
CC
=
5.0 V
0
1.2
V
Over REC hold voltage
REC / PB SW: High
REC
V
8M
V
CC
=
5.0 V
1.8
3.2
V
Normal hold voltage
REC / PB SW: High
REC
V
8H
V
CC
=
5.0 V
3.8
Vcc
V
S-VHS hold voltage
REC / PB SW: High
REC
I
7L
I
7
V
CC
=
5.0 V
1.3
(1.8)
2.3
dB
Over REC current ratio
REC / PB SW: High
REC
I
7H
I
7
V
CC
=
5.0 V
-
2.3
(
-
1.8)
-
1.3
dB
S-VHS current ratio
REC / PB SW: High
REC
V
14H(REC)
V
CC
=
5.0 V
3.6
Vcc
V
Mute hold voltage 1
REC / PB SW: High
REC
V
14L(REC)
V
CC
=
5.0 V
0
1.4
V
Mute hold voltage 2
REC / PB SW: High
PB
I
10(PB)
V
CC
=
5.0 V
9
(13)
17
mA
Circuit current
REC / PB SW: Low
PB
G
3-14
V
CC
=
5.0 V, REC / PB SW: Low
72
(76)
80
dB
CH1 gain
HSW: High, V
IN
=
0.1 mV[p-p], 2 MHz
PB
G
5-14
V
CC
=
5.0 V, REC / PB SW : Low
72
(76)
80
dB
CH2 gain
HSW: Low, V
IN
=
0.1 mV[p-p], 2 MHz
PB
DG
3-14
V
CC
=
5.0 V, REC / PB SW: Low
0
(0.5)
1
dB
CH1 1.5 M / 2 M gain ratio
HSW: High, V
IN
=
0.1 mV[p-p], 2 MHz
PB
DG
5-14
V
CC
=
5.0 V, REC / PB SW: Low
0
(0.5)
1
dB
CH2 1.5 M / 2 M gain ratio
HSW: Low, V
IN
=
0.1 mV[p-p], 2 MHz
PB
G
3-14
V
CC
=
5.0 V, REC / PB SW: Low
-
2
0
2
dB
CH1 / CH2 gain ratio
G
5-14
V
IN
=
0.1 mV[p-p], 2 MHz
Noise referred to PB
N
3-14
V
CC
=
5.0 V
1.0
mV[rms]
CH1 input
REC / PB SW: Low HSW: High
Noise referred to PB
N
5-14
V
CC
=
5.0 V
1.0
mV[rms]
CH2 input
REC / PB SW: Low HSW: Low
s
Electrical Characteristics at T
a
= 25C
Note) The typical value in the parenthesis is not the guaranteed one.
AN3328S
ICs for VCR
4
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
REC Cross modulation
CMD
0.4M
V
CC
=
5.0 V
(
-
45)
dB
distortion at 0.4 MHz
REC / PB SW: High
REC Cross modulation
CMD
0.9M
V
CC
=
5.0 V
(
-
52)
dB
distortion at 0.9 MHz
REC / PB SW: High
REC
I
M
/ I
7
V
CC
=
5.0 V
-
40
dB
Muting ratio
REC / PB SW: High
PB
CT
1
V
CC
=
5.0 V
-
40
dB
Crosstalk CH1 to CH2
REC / PB SW: Low
PB
CT
2
V
CC
=
5.0 V
-
40
dB
Crosstalk CH2 to CH1
REC / PB SW: Low
PB CH1, Output 2nd
D
3-14
V
CC
=
5.0 V, HSW: High
-
50
dB
harmonic distortion
REC / PB SW: Low
PB CH2, Output 2nd
D
5-14
V
CC
=
5.0 V, HSW : Low
-
50
dB
harmonic distortion
REC / PB SW: Low
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
PB
V
16L
V
CC
=
5.0 V
0
1.4
V
Mode hold voltage
REC / PB SW: Low
PB
V
1H(PB)
V
CC
=
5.0 V
3.6
V
CC
V
CH1 hold voltage
REC / PB SW: Low
PB
V
1L(PB)
V
CC
=
5.0 V
0
1.4
V
CH2 hold voltage
REC / PB SW: Low
PB
DV
OFFSET
V
CC
=
5.0 V
20
mV[p-p]
HSW DC unbalanced
REC / PB SW: Low
s
Electrical Characteristics at T
a
= 25C (continued)
Design reference data
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Note) The typical value in the parenthesis is not the guaranteed one.
ICs for VCR
AN3328S
5
Pin No.
Equivalent Circuit
Description
Voltage
Remark
1
Audio head SW
Input signal
At open :
High
(ch.1 Select)
2
REC regulator 1
D.C
3
Head amp. input
ch.1
4
GND (small signal)
5
Head amp. input
ch.2
s
Terminal Equivalent Circuits
23 k
3 k
3 k
3 k
2.5 V
1
5 V
0 V
46.6 k
101.2 k
18 k
REC: ON
2
1.125 k
6 k
2.1 V
380
15 k
3
0.7 V
380
15 k
1.125 k
6 k
2.1 V
5
0.7 V
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