NTE1710
Integrated Circuit
Record/Playback Circuit for VCR
Description:
The NTE1710 is an integrated circuit in a 22Lead DIP type package designed for tape recorder and
VCR audio recording and playback. This device has builtin electronic switches for recording and
playback which include the ones for a noise reduction circuit.
Features:
D
Electronic Switches for REC/PLAY Operation Included (NoiseReduction Switches also Possible)
D
Low Noise (Noise Voltage Referred to Input = 0.95
V P.B., R
g
= 2.2k
, 20Hz to 20kHz)
D
Almost All Functions Necessary for REC/PLAY operation and AGC Circuit Included
D
Low Current Consumption
D
Muting Possible Externally
Absolute Maximum Ratings: (T
A
= +25
C unless otherwiser specified)
Supply Voltage, V
CC
14.4V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation, P
D
700mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
20
to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
55
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (V
CC
= 9V, T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max Unit
Closed Loop Output Voltage
On Playback Mode
V
O(PB)
P.B., Line Out, V
i
= 1kHz, 0.158mV
420
500
594
mV
On Record Mode
V
O(REC)
Rec., Rec Out, AGC: OFF, V
i
= 1kHz, 0.315mV
315
445
628
mV
Total Harmonic Distortion
THD
P.B., Line Out, V
i
= 1kHz, 1.58mV
0.06
0.1
%
Maximum Output Voltage
Line Output
V
O(max)
P.B., f = 1kHz, THD = 1%
1.7
2.2
V
rms
Recording Output
Rec., f = 1kHz, THD = 1%
1.7
2.2
V
rms
Output Noise Voltage
Playback Head Input
V
no
P.B., R
g
= 2.2k
, f = 20Hz to 20kHz
3.0
5.5
mV
Record MIC Input
Rec., R
g
= 2.2k
, f = 20Hz to 20kHz
1.5
2.5
mV
Record Line Input
Rec., R
g
= 0, f = 20Hz to 20kHz
0.14
0.3
mV
Playback Head Input
P.B., R
g
= 0, f = 20Hz to 20kHz
1.7
3.0
mV
Note 1. A capacitor of 10
F or over must be used between Pin11 and GND for the purpose of
preventing the AGC circuit oscillation when it is actually used.
Electrical Characteristics (Cont'd): (V
CC
= 9V, T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max Unit
AGC Output Voltage
V
O(AGC)
Rec., AGC: ON, Rec. Out, V
i
= 1kHz, 0.315mV
315
445
570
mV
Rec., AGC: ON, Rec. Out, V
i
= 1kHz, 31.5mV
700
825
950
mV
AGC Distortion
THDA
0.15
0.3
%
R/PSW Leakage Voltage
V
Leak(P/R)
Rec., Rec Out, V
i
(PB Input) 1kHz 16mV,
Rec. Input Shorted
1.0
6.0
mV
P.B., Line Out, V
i
(MIC Input) 1kHz 31.5mV,
P.B. Input Shorted
1.8
10
mV
Muting ON Leakage Voltage
V
Leak(Mute)
Rec., Rec Out, V
i
(MIC Input) 1kHz 0.5mV,
P.B. Input Shorted
50
100
V
Total Supply Current
I
tot
P.B., Mute: OFF
5.5
9.0
12.5
mA
Mode handling Voltage
Playback Mode
V
18P
0
0.7
V
Record Mode
V
18R
3.5
7.0
V
Muting Holding Voltage
OFF Mode
V
17OFF
0
0.9
V
ON Mode
V
17ON
2.4
4.0
V
Note 1. A capacitor of 10
F or over must be used between Pin11 and GND for the purpose of
preventing the AGC circuit oscillation when it is actually used.
V
CC
Pin Connection Diagram
MIC Input
Rec Neg Feedback
AGC Control
GND
Line Output
Muting Switch
Rec Input
1
2
3
4
EQ Input
EQ Neg Feedback
EQ Output
Buffer Input (Playback)
5
Buffer Feedback (Record)
6
Buffer Output
7
Line Input (Record)
8
Line Input (Playback)
22
21
20
19
MIC Neg Feedback
MIC Output
AGC Input
18
Record/Playback Switch
17
16
15
Rec Output
9
14
Reference Voltage
10
13
11
12
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