1221

NTE1221
Integrated Circuit
Stereo Preamp
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Maximum Supply Voltage, VCCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25V
Collector–Base Voltage (Q1), VCBO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
Collector–Emitter Voltage (Q1), VCEO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Emitter–Base Voltage (Q1), VEBO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V
Collector Current (Q1), IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +125°C
Recommended Operatin Conditions: (TA = +25°C unless otherwise specified)
Recommended Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
Electrical Characteristics: (TA = +25°C, VCC = 6V, f = 1kHz unless otherwise specified)
Parameter
Dissipation Current
Symbol
Test Conditions
I4, I13
Min Typ Max Unit
–
3.5
6.0
mA
Voltage Gain
VG
Vi = 0.5mV
57
61
–
dB
Output Voltage
VO
THD = 5%, RNF = 100Ω
1.0
1.5
–
V
Bandwidth
BW
Vi = 0.5mV, –3dB
–
400
–
kHz
Total Harmonic Distortion
THD
VO = 0.45V, RNF = 100Ω
–
0.5
0.9
%
Input Resistance
ri
–
90
–
kΩ
Output Resistance
ro
–
1
–
kΩ
Crosstalk
CT
–
–40
–
dB
Noise Voltage Converted to Input
VNI
VCC = 10V, Rg = 600Ω, NAB 4.8cm/s
–
1.0
3.0
µV
Collector Cutoff Current
ICBO
VCB = 15V
–
–
1.0
µA
Emitter Cutoff Current
IEBO
VEB = 4V
–
–
1.0
µA
DC Current Gain
hFE
VCB = 3V, IC = 1mA
70
–
–
–
0.5
–
Transistor Characteristics
Collector–Emitter Saturation Voltage
VCE(sat) IC = 1mA, IC/IB = 10mA
V
Pin Connection Diagram
14 Non–Invert Input Amp 2
Invert Input Amp 2 1
13 VCC Amp 2
12 Output Amp 2
Gain Adjust 2
Output Amp 1 3
VCC Amp 1 4
11 Freq Comp Amp 2
Non–Invert Input Amp 1 5
10 Q1 Base
9 Q1 Collector
Invert Input Amp 1 6
Gain Adjust 7
8 Q1 Emitter
14
8
1
7
.785 (19.95) Max
.300 (7.62)
.200 (5.08)
Max
.100 (2.45)
.600 (15.24)
.099 (2.5) Min
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