NTE NTE1687 Datasheet

NTE1687

Linear Integrated Circuit

Dual, 2.5W (7.8W BTL) Audio Amp

Description:

The NTE1687 is a high performance stereo power amplifier in an 11–Lead SIP type package de­signed to deliver 1W/Ch into 4Ω or 2W bridged monaural into 8Ω. It is ideal for sensitive AM radio
applications, exhibiting lower wideband noise, lower distortion, and less AM radiation than conven­tional designs.

Features:

D Low AM Radiation
D Low Noise
D 3V, 4Ω, Stereo PO = 250mW
D Wide Supply Operation: 3V to 15V
D Low Distortion
D PO = 9W Bridged

Applications:

D Compact AM/FM Radios
D Stereo Tape Recorders and Players
D High Power Portable Stereos

Absolute Maximum Ratings:

Supply Voltage, V
Junction Temperature, T
Operating Temperature Range (Note 1), T
Storage Temperature Range, T

S

J

opr

stg

Lead Temperature (During Soldering, 10 sec), T

0°C to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65°C to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

L

18V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

+150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

+260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Note 1. For operation at ambient temperature greater than +25°C, the NTE1687 must be derated

based on a maximum +150°C junction temperature using a thermal resistance which de­pends upon mounting techniques,

Electrical Characteristics: (TA = 25°C, AV = 200 (46dB), T

= 25°C, VS = 12V, RL = 8Ω,

TAB

unless otherwise specified)

Parameter Test Conditions Min Typ Max Unit

Supply Current PO = 0W, Dual Mode – 25 40 mA
Operating Supply Voltage 3 – 15 V
Output Power THD = 10%,

f = 1kHz

Distortion f = 1kHz

Power Supply Rejection Ratio

(PSRR)
Channel Separation CBY = 100µF, f = 1kHz, CIN = 0.1µF, Output Referred –50 –64 – dB
Noise

DC Output Level 5.6 6 6.4 V
Input Impedance 50 100 350 kΩ
Input Offset Voltage – 5 – mV
Voltage Difference between

Outputs
Input Bias Current – 120 – nA

CBY = 100µF, f = 1kHz, CIN = 0.1µF, Output Referred,
V

RIPPLE

Equivalent
Input Noise
R = 0

RS = 0

VS = 12V, RL = 8Ω Dual Mode 2.0 2.5 – W/Ch
VS = 12V, RL = 8Ω Bridge Mode 7.2 9.0 – W
VS = 9V, RL = 4Ω Bridge Mode – 7.8 – W
VS = 9V, RL = 4Ω Dual Mode – 2.5 – W/Ch
PO = 50mW – 0.09 –
PO = 0.5W – 0.11 –
PO = 1W – 0.14 –

–40 –54 – dB

= 250mV

CIN = 0.1µF, BW = 20 – 20kHz – 1.4 – µV
CCIR/ARM – 1.4 –
Wideband – 2.0 –

– 10 20 mV

%

Pin Connection Diagram

(Front View)

11
10

9
8

7
6

5
4

3
2
1

Bypass
Output 1
Bootstrap 1
(–) Input 1

(+) Input 1
GND
(+) Input 2
(–) Input 2

Bootstrap 2
Output 2

(+) V

S