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NTE744 Integrated Circuit RF/IF Amp
Description: The NTE744 is a monolithic silicon integrated circuit that provides an rf amplifier, if amplifier, mixer, oscillator, AGC detector, and voltage regulator on a single chip. It is intended for use in super-heterodyne AM radio receiver applications particularly in automobiles. The NTE744 is supplied in a 14-lead dual-in-line plastic package and operates over the temperature range of -55 to 125C. Features: D Low-noise, low-Rb, rf stage in cascode connection-eliminates Miller-Effect regeneration and allows controlled power rise by the choice of external components. D Mixer-oscillator stage with internal feedback-eliminates need for tapped or multi-winding oscillator coils D Cascode if amplifier with controlled output impedance and negligible Miller Effect-eliminates regeneration and selectivity skewing D Frequency-counter AGC circuit-allows control of AGC response by selection of the coupling capacitor. D Integral regulation with built-in surge protection D Separately accessible amplifiers Absolute Maximum Ratings: DC Supply Voltage (Pin3), V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V DC Supply Voltage (IF Output, Pin6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V DC Supply Voltage (RF Output, Pin13) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V DC Supply Voltage (Mixer Output, Pin14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V DC Current (Pin3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35mA Power Dissipation (Up to TA = +55C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750mW Derate Above TA = 55C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.67mW/C Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125C Storage Temperatur Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Lead Temperature (During Soldering, 1/16" (1.59mm)from case, 10sec max), TL . . . . . . . . +265C
Electrical Characteristics: (TA = +25C unless otherwise specified)
Parameter Static Characteristics DC Voltage At Pin1, Pin4 At Pin2, Pin3, Pin14 At Pin5 At Pin6 At Pin7 At Pin8, Pin9 At Pin10, Pin11 At Pin12 At Pin13 V1, V4 V2, V3, V14 V5 V6 V7 V8, V9 V10, V11 V12 V13 - - - - - - - - - 4.7 6.8 0.25 12 0.76 0 0.71 0.71 4.0 - - - - - - - - - V V V V V V V V V Symbol Test Conditions Min Typ Max Unit
DC Current I1, I4, I5, I7, Into Pin1, Pin4, Pin5, Pin7, Pin8, Pin9, Pin10, Pin11, Pin12 I8, I9, I10, I12 Into Pin2 Into Pin3 Into Pin6 Into Pin13 Into Pin14 Performance Characteristics Sensitivity Input Signal to Dummy Antenna at fIN = 1MHz, 30% AM Modulation at fMOD = 400Hz, for 11mV Output at VO S/N Ratio of Output at VO with Modulation ON & the OFF, Input Signal = 100V, 30% AM Modulation at fMOD = 400Hz Input Signal set at 1MHz, 90% AM Modulation, Distortion at VO must be 10% Pin Connection Diagram I2 I3 I6 I13 I14
- - - - - -
0 1.2 15 4.3 4.5 0.17
- - - - - -
mA mA mA mA mA mA V
-
2.3
-
Signal-to-Noise Ratio
34
43
-
dB
Overload Distortion
160k 400k
-
V
Mixer Input OSC Tank VCC Mixer Bypass AGC Drive IF Output IF Input
1 2 3 4 5 6 7
14 Mixer Output 13 RF Output 12 RF Input 11 RF Bypass 10 AGC Capacitor 9 8 RF GND Substrate & IF Amp GND
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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