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SA5214D Datasheet(PDF) 3 Page - NXP Semiconductors |
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SA5214D Datasheet(HTML) 3 Page - NXP Semiconductors |
3 / 10 page Philips Semiconductors Product specification SA5214 Postamplifier with link status indicator 1998 Oct 07 3 PIN DESCRIPTIONS PIN NO. SYMBOL DESCRIPTION 1 LED Output for the LED driver. Open collector output transistor with 125 Ω series limiting resistor. An above threshold signal turns this transistor ON. 2 CPKDET Capacitor for the peak detector. The value of this capacitor determines the detector response time to the signal, supplementing the internal 10pF capacitor. 3 THRESH Peak detector threshold resistor. The value of this resistor determines the threshold level of the peak detector. 4 GNDA Device analog ground pin. 5 FLAG Peak detector digital output. When this output is LOW, there is data present above the threshold. This pin is normally connected to the JAM pin and has a TTL fanout of two. 6 JAM Input to inhibit data flow. Sending the pin HIGH forces TTL DATA OUT ON, Pin 10, LOW. This pin is normally connected to the FLAG pin and is TTL-compatible. 7 VCCD Power supply pin for the digital portion of the chip. 8 VCCA Power supply pin for the analog portion of the chip. 9 GNDD Device digital ground pin. 10 VOUT TTL output pin with a fanout of five. 11 RPKDET Peak detector current resistor. The value of this resistor determines the amount of discharge current available to the peak detector capacitor, CPKDET. 12 RHYST Peak detector hysteresis resistor. The value of this resistor determines the amount of hysteresis in the peak detector. 13 IN2A Non-inverting input to amplifier A2. 14 OUT1A Non-inverting output of amplifier A1. 15 IN2B Inverting input to amplifier A2. 16 OUT1B Inverting output of amplifier A1. 17 CAZN Auto-Zero capacitor pin (Negative terminal). The value of this capacitor determines the low-end frequency response of the preamp A1. 18 CAZP Auto-Zero capacitor pin (Positive terminal). The value of this capacitor determines the low-end frequency response of the preamp A1. 19 IN1A Non-inverting input of the preamp A1. 20 IN1B Inverting input of the preamp A1. BLOCK DIAGRAM RPKDET 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 43 2 1 A1 A2 A3 A4 A5 A6 A7 GATED AMP OUTPUT BUFFER OUTPUT DISABLE PEAK DETECT LED DRIVER HYSTERESIS VCCA VCCD OUT1A OUT1B A8 IN2B IN2A VOUT JAM FLAG LED IN1B IN1A CAZP CAZN GNDA GNDD THRESH CPKDET RHYST SD00350 Figure 2. Block Diagram |
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