NTE NTE1580

NTE1580
Integrated Circuit
IF Amp & Detector
Description:
The NTE1580 is an IF amplifier in a 14–Lead DIP type package with a symmetrical FM demodulator
and an AF amplifier with adjustable output voltage. The AF amplifier is also provided with an output
for volume control and an input for VCR operation.
The input and output of the NTE1580 are especially designed for LC–circuits, but the input can also
be used with a ceramic filter.
Absolute Maximum Ratings:
Maximum Supply voltage (Pin11, Note 1), Vp = V11–1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V
Maximum Adjustment Voltage (Pin5), V5–1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
Maximum Total Power Dissipation, Ptot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mW
Bypass Resistance, R13–14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1kΩ
Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –15° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C
Note 1. Supply voltage operating range is 10V to 18V
Electrical Characteristics: (VP = 12V, TA = +25°C, f = 5.5MHz unless otherwise specified)
Parameter
Min
Typ
–
68
–
dB
–
30
60
µV
–
250
–
mV
50
60
–
dB
VIF12
–
30
–
mV
VIF8
–
20
–
mV
AF Voltage Gain
GV AF8–3
–
7.5
–
AF Adjustment
∆VO(AF)
20
28
36
dB
AF Output Voltage Control Range
∆VO(AF)
70
85
–
dB
IF Voltage Gain
Input Voltage Starting Limiting
IF Output Voltage at Limiting
(Peak–to–Peak)
AM Suppression
IF Residual Voltage Without De–Emphasis
Pin12
Pin8
Symbol
Test Conditions
GV IF6–14
Vi
∆f = ±50kHz, fm = 1kHz
VO IF(p–p)
α
∆f = ±50kHz, Vi = 500µV,
fm = 1kHz, m = 30%
R4–5 = 5kΩ, R5–1 = 13kΩ
Adjustment Resistor
R4–5
DC Voltage Portion at the AF Outputs
Pin12
V12–1
–
5.6
–
V
V8–1
–
4.0
–
V
Pin8
Note 2
Max Unit
1 to 10
kΩ
Note 2. Pin5 must be connected to Pin4, when volume control adjustment is not applicable.
Electrical Characteristics (Cont’d): (VP = 12V, TA = +25°C, f = 5.5MHz unless otherwise specified)
Parameter
Output Resistance of the AF outputs
Pin12
Pin8
Input Resistance of the AF Input
Stabilized Reference Voltage
Source Resistance of Reference
Voltage Source
Hum Suppression
Pin12
Pin8
Supply Current (Pin11)
Symbol
Min
Typ
RO12–1
–
1.1
–
kΩ
RO8–1
–
1.1
–
kΩ
RI3–1
–
2.0
–
kΩ
V4–1 = Vref
4.2
4.8
5.3
V
R4–1
–
12
–
Ω
V12/V11
–
30
–
dB
V8/V11
–
35
–
dB
IP = I11
9.5
13.5
17.5
mA
4.5pF
–
40
–
kΩ
6.0pF
15
–
–
kΩ
∆f = ±50kHz, Vi = 10µV,
fm = 1kHz, QO = 45
–
1.0
–
V
–
1.2
–
V
∆f = ±50kHz, Vi = 10µV,
fm = 1kHz, QO = 20
–
1.0
–
%
IF Input Impedance
AF Output Voltage
Pin12
|Zi|
VOAF(rms)
Pin8
Distortion
dtot
Test Conditions
Max Unit
Pin Connection Diagram
GND 1
Bias Decoupling 2
Recorder Audio Input 3
Volume Control Bias 4
Volume Control 5
IF Amp Output 6
Phase Shift Network 7
14 IF Input
13 IF Input Bias
12 Constant Level Audio Out
11 VCC
10 IF Amp Output
9 Phase Shift Network
8 Volume Controlled Audio Output
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