ML6424 데이터 시트보기 (PDF) - Micro Linear Corporation
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ML6424 Datasheet PDF : 12 Pages
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PIN DESCRIPTION
Pin #
1,3,
5,11
Name
VCC
Description
Positive supply voltages
(4.75V to 5.25V).
2,10, GND
14
Ground voltages.
4
PULSE I/O U/V clamp switch control input/output
pin. When MODE is low, U/V clamp
control pulse can be applied to this
input pin. When MODE is high, the
internal circuit generates a U/V clamp
control signal to produce an output
pulse at this pin. When MODE is
floating, do not apply any voltage to
this pin since it is internally tied low in
this case. (See table below)
6,7 VIN P, Input to the filter. The input voltage for
VIN M the filter is applied to VIN P pin with
respect to VIN M pin which is
grounded. (With no connection to
MODE pin, input signal range should
be from VIN = 0.5V to 1.5V when
RANGE = Low, VIN = 0V to 1V when
RANGE = High). There is a 100µA
internal current source connected to
each of these inputs.
8
RANGE Input signal range control when
MODE is floating. When RANGE is
low, the input signal range is 0.5V to
1.5V, when RANGE is tied high the
input signal range is 0V to 1V.
9
REXT
Precision resistor to ground that
defines the cutoff frequency of the
filter. (Typical value = 10kΩ)
10% change in REXT produces a 10%
change in fC (Fig. 28).
ML6424/ML6425
Pin #
12
Name
MODE
Description
Input coupling mode control pin.
When MODE is low, U/V signal can
be applied through an external ac
coupling capacitor to VIN P. When
MODE is high, Y signal can be applied
through an external AC coupling
capacitor to VIN P. In this case, an
internal circuitry clamps the sinc tip of
the video input signal. When MODE is
set to mid supply or left floating, input
signal can be directly applied to the
input without an AC coupling capacitor.
13 GAIN Three state gain control pin. GAIN tied
low sets the input amplifier gain to 3/4
(0.75) and the output amplifier gain to
4/3 (1.333). When GAIN is tied high,
the input amplifier gain is 3/2 (1.5) and
the output amplifier gain is 4/3. When
GAIN is set to mid supply or left to
float, the input amplifier gain is 3/4
and the output gain is 8/3 (2.666).
(See table below)
15,16
VOUT P,
VOUT M
The output from the filter is derived
from the VOUT P pin with respect to
the VOUT M pin which is grounded
typically. It can drive 1VPP/75Ω (0.5V
to 1.5V) or 2VPP/150Ω (0.5V to 2.5V).
If the ouput common-mode level
needs to be increased, it can be done
by raising the potential of VOUT M. In
this case, the output is measured from
VOUT P with respect to GND.
MODE
Low
Float
High
INPUT COUPLING
AC for U/V
DC
AC for Y
Pulse Mode Table
PULSE
Input
Internally biased
Output
GAIN INPUT INPUT
SELECT
BUFFER
GAIN
OUTPUT OUTPUT OPTIMIZES
BUFFER
GAIN
Low
Float
1VPP
1VPP
0.75
0.75
1.333
2.666
1VPP
2VPP
—
Differential
Phase
& Gain
High 1VPP 1.50
1.333
2VPP
Noise
Gain Table
3
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