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