Video Switch · 75Ω driver · Y/C mix MM1501
MITSUMI
·Measurement Procedures (MM1501 ~ MM1504)
Connect a DC ammeter to VCC pin and measure. Hereafter, short
the ammeter to use.
Consumption current
ICC
Input a 2.0VP
-
P (1.0VP P for MM1502 and MM1504), 100kHz sine
-
wave to SG1. If TP1 voltage is V1 and TP3 voltage is V2, find Gv
using the following formula:
Voltage gain
GV
GV = 20LOG (V2/V1) dB
In the above Gv measurement, if TP3 voltage at 10MHz is V3, find
fc as follows:
Frequency characteristic
Differential gain
fc
fc = 20LOG (V3/V2) dB
Input a 2.0VP
and measure differential gain at TP3.
APL = 10 ~ 90%
The same as for DG, but measure differential phase.
Input a 2.5VP P (1.25VP P for MM1502, MM1504), 1kHz sine wave to
-P (1.0VP-P for MM1502 and MM1504) staircase to SG1
DG
Differential phase
DP
-
-
Total harmonic distortion ratio
THD
SG1, connect a distortion factor meter to TP3 and measure.
Input a 100kHz sine wave to SG1. Change the amplitude of the sine
wave, and measure VD, the maximum amplitude under THD 1%, at
TP3.
Output dynamic range
Output offset voltage
VD
VOFF
Measure the DC voltage difference of each switch status at TP2.
VC1 = 2.1V and VC2 = 0.7V. Input a 2.0VP P, 4.43MHz sine wave to
-
SG1, and operate SW3. If TP3 voltage when there is an output
signal on the OUT pin is V4, and when there is no signal TP3
voltage is V5, then find CT by the following formula:
CT = 20LOG (V5/V4) dB
Impress an optional DC voltage on TP5 and TP6. Gradually
increase from VC1 = 0V. When TP6 voltage is output on TP2, TP4
voltage is VIH. Gradually lower from VC1 = VCC, and when TP5
voltage is output on TP2, TP4 voltage is VIL.
Cross talk
CT
VI
SW input voltage
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