NTE1604 Integrated Circuit FM IF System for Car Radio Description: The NTE1604 is an integrated circuit in a 16–Lead SIP type package designed for use in FM car stereo receivers. This device features versatile muting characteristics and allows receiver designers to realize the muting performance according to their design concept. Functions: D IF Amplification/Limiter D AFC Output D Muting Bandwidth D Quadrature Detector D D D D Signal Meter Output Muting Under Weak Signal Strength AF Preamplifier AGC Output Features: D Versatile Mutings a. When Muting Operation is Performed under a Weak Signal Strength, an Attenuation Slope of the Audio Output Against the Input Signal Strength Varaitions can be Set at any Given value b. Maximum Muting Attenuation can be Selected Between about 6dB to 40dB c. Input Signal Strength level which Actuates the Muting Circuit can be Set Freely D High Limiting Sensitivity (25dbµ Typ. with Muting OFF) Provides a Fine Quieting Characteristic D High Signal–to–Noise Ratio: 78dB Typ D Low Distortion (0.05% Typ) Available, if used with Double–Tuned Circuits D Good AM Rejection Ratio (63dB with 6 Stages of Differential IF Amplifiers) D Signal Merter Drive Output Proportional to the Input Signal Strength in dB D Clamped (±VBE) AFC Output, Bandwidth Adjustable D Delayed AGC Output for Front End Circuit Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Maximum Supply Voltage (Pin12), VCCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V Maximum Supply Current (Pin12), ICCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA Allowable Power Dissipation, PDmax TA = +25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 640mW TA = +70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 460mW Input Voltage (Pin1 to Pin2), vi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1VP–P Flow–In Current (Pin2, Pin3), I2, I3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.2mA Flow–In Current (Pin6), I6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2mA Flow–Out Current (Pin5, Pin15, Pin16), I5, I15, I16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1mA Flow–Out Current (Pin13, Pin14), I13, I14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2mA 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V VCC Range on Operation, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5V to 16V Electrical Characteristics: (TA = +25°C, VCC = 8V, f = 10.7MHz unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Quiescent Current ICCO Quiescent 15 21 27 mA Current Dissipation ICC vin = 100dBµ 20 25 30 mA Demodulated Output vo vin = 100dBµ, 400Hz, 100% MOD 200 260 320 mVrms Total Harmonic Distortion THD vin = 100dBµ, 400Hz, 100% MOD – 0.05 0.2 % Signal–to–Noise Ratio S/N vin = 100dBµ, 400Hz, 100% MOD 72 78 – dB Input Limiting Voltage vi(lim) vo: 3dB Down, 400Hz, 100% MOD – 25 29 dBµ V14 = 2.0V 22 26 32 dBµ 10 15 20 dB 24 28 32 dB vi = 100dBµ, V14 = 2V 140 210 370 kHz Muting Sensitivity Muting Attenuation vi(mute) Mute (ACC) V6 = 2V (22kΩ) V6 = 5V (22kΩ) Muting Bandwidth BW (mute) vi = 100dBµ, 400Hz, 100% MOD AM Rejection Ratio AMR vi = 100dBµ, FM: 400Hz, 100% MOD, AM: 1kHz, 30% MOD 50 63 – dB Muting Drive Output V14–0 Quiescent 3.5 4.2 5.0 V vi = 100dBµ 0.0 0.0 0.3 V V15–0 Quiescent 0.0 0.1 0.3 V V15–50 vi = 50dBµ 0.8 1.4 2.0 V V15–70 vi = 70dBµ 1.6 2.4 3.2 V V15–100 vi = 100dBµ 4.5 5.3 6.0 V Quiescent 3.5 4.1 4.5 V vi = 100dBµ 0.0 0.02 0.3 V V14–100 Signal Meter Output AGC Output V16–0 V16–100 Offset Voltage V7–13 Quiescent, Pin7 to Pin13 –0.25 0.0 +0.25 V V8–13 Quiescent, Pin8 to Pin13 –0.5 0.0 +0.5 V Pin Connection Diagram (Front View) 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 AGC “S” Meter Mute Drive Vref VCC Quad Input GND IF Output AF Output AFC Mute Input Mute Attenuation Adjust GND Bypass Bypass IF Input .953 (24.1) .127 (3.2) .257 (6.5) .334 (8.48) 1 16 .125 (3.17) .059 (1.5) .118 (3.0)