NTE NTE1710 Datasheet

NTE1710

Integrated Circuit

Record/Playback Circuit for VCR

Description:

The NTE1710 is an integrated circuit in a 22–Lead DIP type package designed for tape recorder and
VCR audio recording and playback. This device has built–in electronic switches for recording and
playback which include the ones for a noise reduction circuit.

Features:

D Electronic Switches for REC/PLAY Operation Included (Noise–Reduction Switches also Possible)
D Low Noise (Noise Voltage Referred to Input = 0.95µV P.B., Rg = 2.2kΩ, 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: (TA = +25°C unless otherwiser specified)
Supply Voltage, V
Power Dissipation, P

CC

D

Operating Temperature Range, T
Storage Temperature Range, T

stg

opr

–20° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–55° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14.4V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

700mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Characteristics: (VCC = 9V, TA = +25°C unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Closed Loop Output Voltage

On Playback Mode

On Record Mode V
Total Harmonic Distortion THD P.B., Line Out, Vi = 1kHz, 1.58mV – 0.06 0.1 %
Maximum Output Voltage

Line Output

Recording Output Rec., f = 1kHz, THD = 1% 1.7 2.2 – V
Output Noise Voltage

Playback Head Input
Record MIC Input Rec., Rg = 2.2kΩ, f = 20Hz to 20kHz – 1.5 2.5 mV
Record Line Input Rec., Rg = 0, f = 20Hz to 20kHz – 0.14 0.3 mV
Playback Head Input P.B., Rg = 0, f = 20Hz to 20kHz – 1.7 3.0 mV

V

O(PB)

O(REC)

V

O(max)

V

no

P.B., Line Out, Vi = 1kHz, 0.158mV 420 500 594 mV
Rec., Rec Out, AGC: OFF, Vi = 1kHz, 0.315mV 315 445 628 mV

P.B., f = 1kHz, THD = 1% 1.7 2.2 – V

P.B., Rg = 2.2kΩ, f = 20Hz to 20kHz – 3.0 5.5 mV

rms
rms

Note 1. A capacitor of 10µF 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): (VCC = 9V, TA = +25°C unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

AGC Output Voltage V

AGC Distortion THD–A – 0.15 0.3 %
R/P–SW Leakage Voltage V

Muting ON Leakage Voltage V

Total Supply Current I
Mode handling Voltage

Playback Mode
Record Mode V

Muting Holding Voltage

OFF Mode
ON Mode V

O(AGC)

Leak(P/R)

Leak(Mute)

tot

V

18–P
18–R

V

17–OFF

17–ON

Rec., AGC: ON, Rec. Out, Vi = 1kHz, 0.315mV 315 445 570 mV
Rec., AGC: ON, Rec. Out, Vi = 1kHz, 31.5mV 700 825 950 mV

Rec., Rec Out, Vi (PB Input) 1kHz 16mV,
Rec. Input Shorted

P.B., Line Out, Vi (MIC Input) 1kHz 31.5mV,
P.B. Input Shorted

Rec., Rec Out, Vi (MIC Input) 1kHz 0.5mV,
P.B. Input Shorted

P.B., Mute: OFF 5.5 9.0 12.5 mA

– 1.0 6.0 mV

– 1.8 10 mV

– 50 100 µV

0 – 0.7 V

3.5 – 7.0 V

0 – 0.9 V

2.4 – 4.0 V

Note 1. A capacitor of 10µF or over must be used between Pin11 and GND for the purpose of

preventing the AGC circuit oscillation when it is actually used.

Pin Connection Diagram

EQ Input

EQ Neg Feedback

EQ Output

Buffer Input (Playback)

Buffer Feedback (Record)

Buffer Output

Line Input (Record)

Line Input (Playback)

Line Output

GND

AGC Control

1
2
3
4
5
6
7
8

22
21
20
19
18
17
16
15

10 13
11 12

MIC Input
MIC Neg Feedback
MIC Output
AGC Input

Record/Playback Switch
Muting Switch

Rec Input
Rec Neg Feedback
Rec Output9 14

Reference Voltage
V

CC