U4488BM Atmel, U4488BM Datasheet
U4488BM
Specifications of U4488BM
Related parts for U4488BM
U4488BM Summary of contents
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Features • 5-V Supply Voltage • Gain-controlled 3-stage Wide-band IF Amplifier • Active Carrier Generation by FPLL Principle (Frequency-Phase-Locked-Loop) for True Quadrature Demodulation • Complete Alignment-free AM Demodulator • Switchable Amplitude Detector for Gain Control, Which Operates as a Peak ...
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Circuit Description IF Amplifier and AGC IF Input Switch Standard Switch Internal Voltage Stabilizer FPLL, VCO AM Demodulator Quasi-split-Sound (QSS) Mixer Mute Switch U4488B 2 The symmetrical IF input signal from the external SAW filter is fed to the pins ...
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Pin Configuration Figure 2. Pinning DIP16 Pin Description Pin Symbol Function 1, 2 VI1,IF IF input 1 (symmetrical) 3 CAGC Capacitor for the AGC time constant 4 CREF Capacitor for the internal reference voltage 5 LF Loop filter 6 VO,AM ...
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Absolute Maximum Ratings Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in ...
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Electrical Characteristics +25°C; reference point pin 13, unless otherwise specified. S amb Parameters DC Supply (Pin 14) Supply voltage Supply current IF Input (Pins 1, 2 respectively 15 and 16) Minimum IF input signal ...
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Electrical Characteristics (Continued +25°C; reference point pin 13, unless otherwise specified. S amb Parameters (4) Intercarrier Output (Pin 12) DC output voltage Output resistance Intercarrier output signal Intercarrier bandwidth Weighted signal-to-noise ratio (CCIR 468) ...
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Figure 3. Test Circuit 680 680 Intercarrier frequency Standard L 32.4 MHz IF Standard B/G 33.4 38.9 MHz MHz 4797A–TVVCR–02/ µ SFT 5. U2860B SFT ...
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Internal Pin Configuration U4488B 8 Figure 4. Sound IF Inputs (Pins 1 and 2 Respectively 15, 16 Figure 5. AGC Time Constant (Pin 3) 3 Figure 6. Internal Reference Voltage (Pin ...
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Figure 7. Loop Filter (Pin 5) 5 Figure 8. AM Output (Pin 6) 1. 100 Figure 9. AGC Switch (Pin 7) 7 Figure 10. VCO (Pins 8 and 2. IDC ...
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U4488B 10 Figure 11. Mute Switch (Pin 10 Figure 12. IF Input Switch (Pin 11 Figure 13. Intercarrier Output (Pin 12) 12 3.5 V 2 2.0 V ...
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Ordering Information Extended Type Number U4488B-M Package Information Package DIP16 Dimensions in mm Alternative 4797A–TVVCR–02/04 Package DIP16 20.0 max 1.64 0.58 2.54 1.44 0.48 17. Remarks – 7.82 7.42 4.8 max 6.4 max 3.3 0.5 min ...
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