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TDA8578 Datasheet(PDF) 3 Page - NXP Semiconductors

Part No. TDA8578
Description  Dual common-mode rejection differential line receiver
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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TDA8578 Datasheet(HTML) 3 Page - NXP Semiconductors

 
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1995 Dec 15
3
Philips Semiconductors
Product specification
Dual common-mode rejection differential
line receiver
TDA8578
BLOCK DIAGRAM
Fig.1 Block diagram.
MBD209
TDA8578
VCC
12
8
11
1
5
6
7
9
16
V
CC
GND
INR
INR
INL
INL
OUTL
SVRR
OUTR
FUNCTIONAL DESCRIPTION
The TDA8578 contains two identical differential amplifiers
with a voltage gain of 0 dB. The device is intended to
receive line input signals. The device has a very high-level
of common-mode rejection and it eliminates ground noise.
The common-mode rejection keeps constant up to high
frequencies. The gain of the amplifiers is fixed at 0 dB. The
inputs have a high-input impedance and the output stage
is a class AB stage with a low-output impedance. For a
large common-mode rejection also at low frequencies, an
electrolytic input capacitor at the negative input pin is
advised. The input impedance is relative high, this would
result in a large settling time of the DC input voltage.
Therefore a quick charge circuit is included that charges
the input capacitor within 0.2 s.
All input and output pins are protected against high
electrostatic discharge conditions (4000 V, 150 pF, 150
Ω).
PINNING
SYMBOL
PIN
DESCRIPTION
INL+
1
positive input left
n.c.
2
not connected
n.c.
3
not connected
n.c.
4
not connected
INL
5
negative input left
INR
6
negative input right
INR+
7
positive input right
SVRR
8
half supply voltage
GND
9
ground
n.c.
10
not connected
OUTR
11
output right
OUTL
12
output left
n.c.
13
not connected
n.c.
14
not connected
n.c.
15
not connected
VCC
16
supply voltage
Fig.2 Pin configuration.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
TDA8578
GND
INR
INR
INL
INL
OUTL
SVRR
OUTR
n.c.
n.c.
n.c.
n.c.
n.c.
n.c.
n.c.
V CC
MBD210


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