NTE1214
Integrated Circuit
AM Tuner System
Description:
The NTE1214 is a high integrated circuit in a 16–Lead DIP type package designed for use in the AM
system of high grade receivers. This device contains most of the functions needed for AM receiving.
Functions:
DRF Amplifier
DFrequency Counter
DIF Amplifier
DDetector
DAGC
DSignal Meter Driving
Features:
DRF Amplifier Stage:
Good quieting sensitivity by means of low noise transistors and cascade connecting.
DFrequency Converter Stage:
Splendid spurious characteristics by means of reduction of high frequency distortion in local
oscillation and differential mixer.
DIF Amplifier Stage:
Reasonable distortion by wide output dynamic range.
DDetector Stage:
Low distortion even at deep modulation considering diagonal clip or negative clip.
DAGC Stage:
Wide AGC range and good large input signal characteristics by AGC’d IF and RF amplifier
stage.
DSignal Meter Driving Stage:
Excellent linearity to input signal.
DOthers:
Stabilized biasing against supply voltage drifting over all stages. Particularly superior com-
pensation circuit in IF amplifier. Less deterioration of gain, detector output, and distortion in
low supply voltage range in order to get wide supply voltage range (7V* to 16V).
* Needs to vary peripheral parts and its value of RF and local oscillator stage for the purpose of low
supply voltage operation.
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Maximum Supply Voltage (Pin3, Pin11), VCCmax 16V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage (Pin4, Pin5), vo24V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage (Pin2), vi0 to 4V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Current (Pin3, Pin4, Pin5, Pin11), ICC 30mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flow–Out Current (Pin15), I15 2mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Allowable Power Dissipation (TA ≤ +70°C), PDmax 450mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, Topr –20° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, Tstg –40° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Operating Conditions: (TA = +25°C unless otherwise specified)
Recommended Supply Voltage, VCC 12V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (TA = +25°C, VCC = 12V, f = 1000kHz, fm = 400Hz unless otherwise
specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Current Dissipation ICC No Input –16 23 mA
Detector Output voInput 23dB, 30% MOD –27.5 –23.0 –dBm
Input 80dB, 30% MOD –16 –13 –10 dBm
Signal–to–Noise Ratio S/N Input 23dB, 30% MOD 16 20 –dB
Input 80dB, 30% MOD 49 53 –dB
Total Harmonic Distortion THD Input 80dB, 80% MOD –0.5 1.0 %
Input 107dB, 30% MOD –0.3 1.0 %
Signal Meter Driving Output VSM Input 107dB, 30% MOD 0.40 0.44 0.48 V
Note 1. 0dBm is defined as 0.775V, and in IF circuit 0dB is 1µV of IHF input at the use of IHF dummy
antenna.
IF System VCC
2nd IF Amp Output
3rd IF Amp Input Tune
3rd IF Amp Input
Pin Connection Diagram
Converter VCC
OSC Tank Circuit
Converter Output
DC Return (Substrate)
Detector Output
AGC Bypass
RF Amp DC Bypass
Converter Input
RF Amp Output
RF T une
RF Amp DC Bypass 1
2
3
4
5
6
7
8
16
15
14
13
Tune Meter Output
12
11
10
9
16 9
18
.785 (19.9) Max
.200 (5.08)
Max
.245
(6.22)
Min
.300 (7.62)
.700 (17.7)
.100 (2.54)
.260 (6.6) Max
