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SA5214D Datasheet(PDF) 3 Page - NXP Semiconductors

No. de pieza SA5214D
Descripción Electrónicos  Postamplifier with link status indicator
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Fabricante Electrónico  PHILIPS [NXP Semiconductors]
Página de inicio  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

SA5214D Datasheet(HTML) 3 Page - NXP Semiconductors

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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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