1223

NTE1223
Integrated Circuit
Low Noise High Gain Pre−Amplifier Circuit
For General Purpose Audio Pre−Amplifiers
Features:
D External initial stage emitter resistor which determines feedback voltage gain and assures better temperature characteristics.
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Power Dissipation (TA ≤ 75°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mW
Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55° to +125°C
Electrical Characteristics: (VCC = 9V, f = 1kHz, TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
−
1.3
2.3
mA
Total Circuit Current
Itot
Closed Circuit Voltage Gain
Gvo
Vi = 0.1mV
75
80
−
dB
Output Voltage (AC)
Vo
THD = 1%
1.5
2
−
Vrms
THD
VO= 0.3V
−
0.07
0.2
%
−
130
−
kΩ
−
0.8
1.5
µVrms
Total Harmonic Distortion
Input Resistance
Ri
Input Referred Noise Voltage
Vni
Rg = 2.2kΩ
Pin Connection Diagram
(Front View)
7 VCC
6 Output
5 Bypass
4 GND
3 Feedback
2 Input
1 Equalization
.118 (3.0)
.728 (18.5) Max
.248
(6.3
Max
.095 (2.42)
1
7
.118 (3.0) Min
.100 (2.54)
.600 (15.24)
.012 (0.32)
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