CXA1498S/M [ETC]
Recording/Playback Equalizer Amplifier for StereoTape Recorder ; 录制/播放均衡器放大器StereoTape记录\n
| 型号： | CXA1498S/M |
| 厂家： | 
ETC |
| 描述： | Recording/Playback Equalizer Amplifier for StereoTape Recorder
|
| 文件： | 总13页 (文件大小：269K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CXA1498S/M
Recording/Playback Equalizer Amplifier for Stereo Tape Recorder
For the availability of this product, please contact the sales office.
Description
The CXA1498S/M is a bipolar IC designed as
equalizer amplifier for tape redorder recording/
playback. This IC is particularly well-suited for double
cassette deck applications. An on-chip filter serves to
greatly reduce the number of external parts.
CXA1498M
CXA1498S
30 pin SOP (Plastic)
30 pin SDIP (Plastic)
Features
• Recording equalizer amplifier × 2
(Monolithic filter eliminates the need for external
resonance circuit)
• AGC (automatic gain control) × 2
• Playback equalizer amplifier × 2
(Variable resistor eliminates the need for external
feedback resistor)
• Electronic switch for playback head
(Changes between A and B decks)
• Electronic switch for tape equalization
(120µs/70µs) (Independently for A and B decks)
• Electronic switch for metal tapes
• Electronic switch for normal/high speed dubbing
(Effective for both REC EQ and PB EQ)
• Recording mute function
(Soft mute is possible through use of an external
time constant circuit)
• DC controllable for fade IN/OUT
(Controls recording mute function)
• Playback mixing output pin provided
(For tune selection)
Applications
Recording/playback equalizer amplifier, playback
mixing amplifier and AGC for analog stereo tape
recorders
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings (Ta = 25°C)
• Supply voltage
• Operating temperature
• Storage temperature
• Allowable power dissipation
VCC
12
V
Topr –20 to +75 °C
Tstg –65 to +150 °C
PD SDIP
930
630
mW
mW
SOP
Recommended Operating Condition
Supply voltage
VCC
4.5 to 10.0
V
• Use of this IC simplifies the construction of double
cassette dubbing system
Block Diagram and Pin Configuration (Top View)
30
29
28
27
26
25
24
RFC
23
DECK
A/B
22
21
20
VG
19
AGC
30k
18
REC
IN
17
16
REC
OUT
PB IN1 PB IN2 PB FB1 PB FB2
100k
PB
OUT
RFS
DECK
-A EQ
REC
MUTE
VCC
VCC
30k
210k
PB EQ
CONTROL
MUTE
CONT
DECK
A/B
DECK- B
PB
VGS
DECK- A
REC EQ
AGC DET
DECK- A
PB
DECK
A/B
REC EQ
GND
BIAS &
I REF
REC EQ
CONTROL
DECK- B
210k
100k
PB IN1 PB IN2 PB FB1 PB FB2
PB
OUT
MS
OUT
DECK
-B EQ METAL
9
AGC
TC
REC
IN
REC
OUT
15
I REF SPEED
7
AGC
GND
1
2
3
4
5
6
8
10
11
12
13
14
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
– 1 –
E91860C49-ST
CXA1498S/M
Pin Description and Equivalent Circuit
(Ta = 25°C, VCC = 8V, no signal)
Description
Pin
No.
DC
voltage
I/O
resistance
Symbol
I/O
Equivalent circuit
VCC
RFS
× 6
× 6
1
2
PBIN1 L
PBIN2 L
Playback equalizer
amplifier input pins.
1
1
2
0V
I
—
147
29 PBIN2 R
30 PBIN1 R
× 2
29
30
GND
VCC
RFS
VCC
Playback equalizer
amplifier negative
feedback pins.
10p
10p
147
3
PBFB1 L
VCC
7k
1
× 3
0.8V
—
O
68kΩ
147Ω
28 PBFB1 R
× 5
500
147
3
5
210k
500
× 6
× 6
× 4
28
10k
10k
26
× 6
5
PBOUT L
Playback equalizer
amplifier output pins.
1
2.5V
26 PBOUT R
100k
GND
To 26
5
VCC
RFS
Connection pins for
the capacitor that
determines the
playback equalizer
amplifier's time
constant
× 5
× 5
147
7k
4
4
PBFB2 L
1
27
2.5V
—
—
27 PBFB2 R
(120µs, 70µs, etc.)
GND
VCC
VCC
× 2
Mixed output pin for
the L and R outputs of
the playback equalizer
amplifier.
500
147
500
5k
6
1
6
MS OUT
2.5V
O
147Ω
× 4
GND
– 2 –
CXA1498S/M
Pin
No.
DC
voltage
I/O
resistance
Symbol
I/O
—
Equivalent circuit
Description
VCC
VCC
Recording/playback
equalizer reference
current setting pin.
× 2
7
7
I REF
1.2V
—
147
5p
GND
GND
Tape speed switching
pin.
High: high speed
Low: normal speed
8
9
SPEED
B EQ
B deck equalizer
switching pin.
High: 70µs EQ
Low: 120µs EQ
VCC
VCC
8
B deck metal tape
switching pin.
High: metal tape
9
147
10
22
23
10 METAL
22 A EQ
—
I
—
Low: normal or CrO tape
2
A deck equalizer
switching pin.
High: 70µs EQ
Low: 120µs EQ
GND
A deck/B deck
playback switching pin.
High: PBIN2
23 DECK AB
Low: PBIN1
VCC
VCC
× 2
× 2
Connection pin for
the resistance and
capacitor that
200
500
× 2
11
AGC TC
0V
—
—
11
× 4
determines the AGC
attack recovery time
constant.
147
500
100k
200
GND
– 3 –
CXA1498S/M
Pin
No.
DC
voltage
I/O
resistance
Symbol
I/O
Equivalent circuit
Description
VCC
VCC
AGC pins for varying
the input resistance
according to the input
signal level over a
range from 100kΩ to
several 10Ω.
12
19
12 AGC_L
19 AGC_R
4V
I/O 100kΩ
200
200
100k
5k
VGS
× 4
GND
10k
VCC
VCC
VGS
1.8k
24k
50k
147
13 RECIN L
18 RECIN R
Recording equalizer
amplifier input pins.
13
18
4V
0V
4V
8V
4V
I
50kΩ
5p
GND
14
GND
14 GND
—
O
—
Ground pin.
VCC
VCC
5p
40k
× 3
500
15 RECOUT L
16 RECOUT R
Recording equalizer
amplifier output pins.
147
147Ω
15
16
500
× 10
VG
GND
Power supply voltage
pin.
VCC
17 VCC
—
—
—
17
VCC
VCC
3p
× 2
500
30k
Connection pin for the
capacitor that eliminates
ripple at the signal
147
To each
VGS
20
20 VG
15kΩ
500
× 4
30k
reference voltage.
GND
– 4 –
CXA1498S/M
Pin
No.
DC
voltage
I/O
resistance
Symbol
I/O
Equivalent circuit
Description
VCC
VCC
Recording mute control
pin.
Permits soft mute by
connecting an external
CR time constant circuit.
147
20k
20k
21
21 MUTE
—
I
—
× 3
× 3
2V
GND
VCC
VCC
VCC
Connection pin for the
resistance and
capacitor used for
generating stable
voltage by eliminating
ripple from the power
supply voltage.
2
147
24 RFC
8V
—
O
—
—
24
× 250
25
To each RFS
Stable voltage output
pin.
2
7.2V
25 RFS
GND
1
2
The values of DC voltage require connection of bias resistance between GND and Pins 1, 2, 29 and 30,
respectively.
The values of DC voltage require connection of a resistance between Pin 24 and VCC, and a capacitor
between Pin 24 and GND for eliminating ripple, respectively.
– 5 –
CXA1498S/M
Electrical Characteristics
Item
(Ta = 25°C, VCC = 8.0V)
Symbol
Vopr
ICC
Conditions
Single power supply
Min.
4.5
Typ.
8.0
Max. Unit
10.0
15.5
V
Operating voltage
Current consumption
Reference input level
Reference output level
NORM/120µs-NORM, No signal
NORM-NORM, 315Hz
NORM-NORM, 315Hz
7.0
11.5
mA
VIN
–34.5 –33.0 –31.5 dBm
VOUT
—
60.0
8.0
—
–6.0
63.5
10.0
0.19
—
—
dBm
dB
SN
(A-WTG)
S/N ratio
(NORM-NORM)
Rg = 5kΩ, “A”-WTG filter
RL = 2.7kΩ, 1kHz, THD = 1%
RL = 2.7kΩ, 1kHz, 0dB
NORM-NORM
SH
—
dB
Signal handling
Total harmonic
distortion
THD
0.5
%
VOFF
FNN-1
FNN-2
FNN-3
FCN-1
FCN-2
FCN-3
FMN-1
FMN-2
FMN-3
FNH-1
FNH-2
FNH-3
FCH-1
FCH-2
FCH-3
FMH-1
FMH-2
FMH-3
MT-1
3.8
–1.6
2.4
6.4
3.4
6.1
9.4
3.2
5.1
7.6
–1.4
3.9
7.0
3.1
7.6
10.3
3.7
7.7
9.8
—
4.13
–0.4
3.9
4.5
0.8
V
Output offset voltage
3kHz, –20dB
For NORM-
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
NORM-NORM mode
frequency
characteristics
8kHz, –20dB
12kHz, –20dB
3kHz, –20dB
8kHz, –20dB
12kHz, –20dB
3kHz, –20dB
8kHz, –20dB
12kHz, –20dB
5kHz, –20dB
15kHz, –20dB
20kHz, –20dB
5kHz, –20dB
15kHz, –20dB
20kHz, –20dB
5kHz, –20dB
15kHz, –20dB
20kHz, –20dB
5.4
NORM at 315Hz
–20dB
8.9
11.4
5.8
4.6
For NORM-
NORM at 315Hz
–20dB
CrO2-NORM mode
frequency
characteristics
7.6
9.1
11.4
4.4
13.4
5.6
METAL-NORM mode
frequency
characteristics
For NORM-
NORM at 315Hz
–20dB
6.6
8.1
9.6
11.6
1.0
–0.2
5.7
For NORM-
NORM at 315Hz
–20dB
NORM-HIGH mode
frequency
characteristics
7.5
9.5
12.0
5.5
4.3
CrO2-HIGH mode
frequency
characteristics
For NORM-
NORM at 315Hz
–20dB
9.4
11.2
15.3
6.1
12.8
4.9
METAL-HIGH mode
frequency
characteristics
For NORM-
NORM at 315Hz
–20dB
9.2
10.7
14.8
12.3
NORM-NORM, 1kHz, +8dB
–85.0 –80.0
–6.0 –4.0
Recording mute ratio
NORM-NORM, 1kHz, 2.0V
(pin voltage)
Recording mute
characteristics
MT-2
–8.0
dB
AGC-L
AGC-B
THD-A
RIN = 10kΩ, 1kHz, –25dBm
RIN = 10kΩ, 1kHz, –15dBm
RIN = 10kΩ, 1kHz, 0.0dBm
–31.0 –29.0 –27.0 dBm
AGC level
–2.0
—
0.0
0.8
2.0
1.5
dB
%
Channel balance
AGC distortion
– 6 –
CXA1498S/M
Item
Symbol
PB-REF
Conditions
Min.
Typ.
Max. Unit
315Hz, -70dBm, Frequency
characteristics standard (0dB)
120µs-NORM mode
frequency
–27.0 –25.0 –23.0 dBm
characteristics
F120-N
F70-N
F120-H
F70-H
SH
For 2.7kHz, –58.5dBm, at 315Hz –1.5
For 4.5kHz, –53.8dBm, at 315Hz –1.2
0.0
0.3
1.5
1.8
3.7
4.1
—
dB
dB
70µs-NORM frequency
120µs-HIGH frequency
70µs-HIGH frequency
Signal handling
For 5.3kHz, –52.5dBm, at 315Hz
For 9.1kHz, –47.8dBm, at 315Hz
RL = 2.7kΩ, 1kHz, THD = 1%
RL = 2.7kΩ, 1kHz, –52dBm
0.7
1.1
2.2
dB
2.6
dB
–10.0
—
–3.0
0.19
dBm
%
THD
0.5
Total harmonic distortion
S/N ratio
(120µs-NORM)
SN (A-WTG) Rg = 2.2kΩ, “A”-WTG filter
55.0
60.0
—
dB
VOFF
RFB
120µs-NORM, Rg = 100kΩ
2.2
150
—
2.5
210
0.3
0.0
2.8
270
1.0
1.5
V
Output offset voltage
DC feedback resistance
Input bias resistance
MIX output voltage
kΩ
µA
dB
RIN
V-MIX
120µs-NORM, 2.7kHz, –52dBm
–1.5
Ripple filter output
current
RFIO
VCH
VCL
10.0
2.5
—
—
—
—
VCC
1.0
mA
V
Threshold voltage of mode
control pin
Control voltage “High”
level
Threshold voltage of mode
control pin
Control voltage “Low”
level
GND
V
NORM-NORM = NORMAL Tape, NORMAL Speed
CrO2-NORM = CrO2 Tape, NORMAL Speed
METAL-NORM = METAL Tape, NORMAL Speed
120µs-NORM = EQ: 120µs, NORMAL Speed
70µs-NORM = EQ: 70µs, NORMAL Speed
NORM-HIGH = NORMAL Tape, HIGH Speed
CrO2-HIGH = CrO2 Tape, HIGH Speed
METAL-HIGH = METAL Tape, HIGH Speed
120µs-HIGH = EQ: 120µs, HIGH Speed
70µs-HIGH = EQ: 70µs, HIGH Speed
– 7 –
CXA1498S/M
( R )
( L )
R E C O U T R C O U T
/ 2 5 V
C 2 7 1 0 0 µ
C C V
( R )
G N D
( L )
R 3 9 5 . 1 k
R 4 0 5 . 1
R E C I N
R C I N
R 3 8 6 2
/ 2 5 V C 2 2 1 0 µ
R 3 7 6 2 k
C 2 3 4 . 7 µ
/ 2 5 V
/ 2 5 V
( R )
A G C
( L )
A C
C 2 1 1 0 µ R 3 5 1 0 k
R 3 6 1 0 k
/ 2 5 V
C 2 0 1 0 µ
T C
A C
V G
R 3 4 3 0 0 k
/ 2 5 V
C 1 9 7 µ
/ 2 5 V C 1 8 1 µ
R 3 1 1 k
/ 2 5 V C 1 7 1 µ
R 3 0 1 k
M U T E
R E C
M E T A L
/ 2 5 V C 1 6 1 µ
R 2 8 1 k
/ 2 5 V C 1 5 1 µ
R 2 7 1 k
E Q
E Q
D C K - B
D E C K - A
/ 2 5 V C 1 4 1 µ
R 2 6 1 k
/ 2 5 V C 1 3 1 µ
R 2 5 1 k
A / B
S P E E D
I R E F
D E C K
/ 2 5 V
C 1 2 1 0 0 µ
R F C
R 2 4 1 0 k
R 2 1 4 7 0
R 2 3 2 7 k
R 2 0 2 . 7 k
R F S
M S O U T
( R )
( L )
P B O U T
P B F B 2
P B F B 1
P B I N 2
P B O U T
R 1 7 2 . 7 k
R 1 8 2 . 7 k
( R )
( R )
( R )
( R )
( L )
P B F B 2
( L )
P F B 1
R 1 3 2 k
R 1 2 2 . 2 k
/ 2 5 V C 3 4 . 7 µ
/ 2 5 V C 4 4 . 7 µ
( L )
P I N 2
R 1 1 6 8 0 k
R 9 0 k
R 8 1 0 0 k R 1 0 6 8 0 k
/ 2 5 V C 2 4 . 7 µ
R 7 6 8 0 k
/ 2 5 V C 1 4 . 7 µ
R 6 6 8 0 k
( L )
P B I N 1
P B I N 1
R 5 1 0 0 k
R 4 1 0 0 k
R 2 2 . 2 k
R 3 2 . 2 k
– 8 –
CXA1498S/M
C 2 5 1 0 0 µ
C 2 4 0 . 4 µ
C 2 3 0 . 4 7 µ
( R E C O U T )
D o l b y N R I C
f r o m D o l b y N R I C
( R E C O U T )
D o l b y N R I C
f r o m D o l b y N R I C
L I N E I N
L I N E I N
R 1 3 1 0 k
R 1 2 1 0 k
D o l b y N R I C ( R E C I N )
t o D o l b y N R I C
D o l b y N R I C ( R E C I N )
t o D o l b y N R I C
C 1 8 4 . 7 µ
C 1 7 4 . 7 µ
R 1 1 1 M
C 1 5 4 7 µ
R 9 1 0 k
( M E T A L / M E T A L )
R E C M U T E
D E C K - A E Q
D E C K A / B
M E T A L
R 1 0 1
C 1 4 4 . 7 µ
R 8 1 0 k
C 1 3 4 . 7 µ
R 7 1 0 k
D E C K - B E Q
C 1 2 4 . 7 µ
R 6 1 0 k
C 1 1 4 . 7 µ
R 5 1 0 k
S P E E D
C 1 0 4 . 7 µ
C 9 4 . 7 µ
R 4 1 0 k
C 8 1 0 0 µ
F i l t e r O U T
t o A M S
D o l b y N R I C ( P B I N )
t o D o l b y N R I C
D o l b y N R I C ( P B I N )
t o D o l b y N R I C
– 9 –
CXA1498S/M
Notes on Operation
(1) Operation mode control (each mode of recording and playback equalizers)
1: Playback equalizer switching (120µs/70µs)
(Pins 9, 22 and 23)
DECK A-EQ (Pin 22)
DECK B-EQ (Pin 9)
L
H
L
H
L
120µs (A-DECK)
70µs (A-DECK)
Follows A-EQ control.
120µs (B-DECK) 70µs (B-DECK)
DECK A/B
(Pin 23)
H
Follows B-EQ control.
2: Normal/double speed switching
(Pin 8)
Both playback and recording equalizers are switched in normal/double speed switching.
For double speed, both playback and
recording systems are switched to
double speed characteristics of each
setting mode:
L
H
SPEED Pin 8
Playback EQ
Recording EQ
Normal speed
Normal speed
Double speed
Double speed
(PB-EQ: 120µs, 70µs)
(REC-EQ: NORMAL, CrO2, METAL)
3: Recording equalizer switching (NORMAL, CrO2, METAL)
(Pins 9 and 10)
METAL (Pin 10)
L
H
L
NORMAL (Type-I)
CrO2 (Type-II)
METAL (Type-IV)
METAL (Type-IV)
DECK B-EQ
(Pin 9)
H
(2) Recording mute (REC MUTE: ON/OFF)
(Pin 21)
The recording mute function of the CXA1498S is controlled by a recording mute circuit to vary the electric
volume for recording equalizer amplifier gain by applying the DC voltage to REC MUTE (Pin 21).
Recording mute ON Attenuation –6dB Recording mute OFF
REC MUTE
GND ≤ VCL ≤ 0.5V
2.0V
3.5V ≤ VCH ≤ VCC
Control voltage
– 10 –
CXA1498S/M
Recording equalizer vs. Frequency characteristics (Normal speed)
25
0dB = NORM-NS mode
315Hz, –25dBm at Rec Out
20
15
10
METAL-NS
CrO2-NS
5
0
NORM-NS
–5
0.125
1.0
10
50
FREQ [kHz]
Recording equalizer vs. Frequency characteristics (Double speed)
25
0dB = NORM-NS mode
315Hz, –25dBm at Rec Out
20
15
10
METAL-HS
CrO2-HS
5
0
NORM-HS
–5
0.125
1.0
10
50
FREQ [kHz]
Playback equalizer vs. Frequency characteristics
60
120µs-NS
120µs-HS
70µs-NS
70µs-HS
5
dB/
20
0.050 0.1
1.0
10
20
FREQ [kHz]
– 11 –
CXA1498S/M
AGC output voltage characteristics
–10
–15
–20
–25
–30
–35
AGC OFF
AGC ON
–35
–30
–25
–20
–15
–10
–5
0
5
Input level [dBm]
AGC total harmonic distortion
1.0
0.1
0.01
–35 –30 –25 –20 –15 –10 –5
Input level [dBm]
0
5
– 12 –
CXA1498S/M
Package Outline
CXA1498S
Unit: mm
30PIN SDIP (PLASTIC) 400mil
+ 0.4
26.9 – 0.1
30
16
0° to 15°
1
15
1.778
0.5 ± 0.1
0.9 ± 0.15
PACKAGE STRUCTURE
EPOXY / PHENOL RESIN
MOLDING COMPOUND
LEAD TREATMENT
LEAD MATERIAL
SONY CODE
EIAJ CODE
SDIP-30P-01
SOLDER PLATING
COPPER ALLOY
1.8g
SDIP030-P-0400-A
JEDEC CODE
PACKAGE WEIGHT
CXA1498M
30PIN SOP (PLASTIC) 375mil
+ 0.4
– 0.1
+ 0.4
18.8
2.3
– 0.05
30
16
0.10
0.1 ± 0.1
A
1
15
+ 0.1
0.2
– 0.05
0.45 ± 0.1
1.27
0° to 10°
DETAIL
A
± 0.12
M
PACKAGE STRUCTURE
PACKAGE MATERIAL
LEAD TREATMENT
EPOXY RESIN
SOLDER PLATING
SONY CODE
EIAJ CODE
SOP-30P-L03
SOP030-P-0375-C
COPPER / 42 ALLOY
0.7g
LEAD MATERIAL
JEDEC CODE
PACKAGE WEIGHT
– 13 –
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