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Satellite IF Switch
AC ELECTRICAL CHARACTERISTICS
(MAX12005 EV Kit, V CC = +3.0V to +3.5V, f IN = 950MHz, V IN = 70dB F V, T A = -40 N C to +85 N C, mode set to master, input gain stages
set to 0dB, RF inputs matched to 75 I , RF output loads = 75 I . Typical values are at +3.3V and at T A = +25 N C, unless otherwise
noted.) (Note 1)
PARAMETER
Operation Frequency
DISEQC_RX_ Tone Input Level
SYMBOL
f RF
V IN
CONDITIONS
f IN = 22kHz (Note 5)
MIN
950
60
TYP
MAX
2150
UNITS
MHz
mV P-P
0dB gain
0
Switch Gain at 950MHz (Note 3)
Cascade Input Switch Gain at
950MHz
|S 21|
+6dB gain
+12dB gain
+6
+12
0
dB
dB
Switch-to-Switch Gain Match
Gain Slope with Frequency
D |S 21 |
At 950MHz (Note 4)
Between 950MHz and 2150MHz
-1.5
+3
+3.5
dB
dB
Gain change from single output con-
Single-Input Source Gain Change
nected to a single input to four outputs
-0.4
dB
connected to a single input
Output level set to +89dB F V by varying
3rd-Order Intermodulation Product
(Case 1)
IM3
three equal amplitude tones at 955MHz,
962MHz, and 965MHz; measure products
-35
dBc
at 952MHz and 958MHz
Output level set to +89dB F V by varying
3rd-Order Intermodulation Product
(Case 2)
IM3
three equal amplitude tones at 2135MHz,
2142MHz, and 2145MHz; measure prod-
-34
dBc
ucts at 2132MHz and 2138MHz
RFIN1–RFIN8 Input Return Loss
CASCADE_IN1–CASCADE_IN4 Input
Return Loss
RFOUT1–RFOUT4 Output Return Loss
Switch Isolation
Port-to-Port Isolation
DiSEqC Clock
|S 11 |
|S 11 |
|S 22 |
f OSC
-12
-12
-12
55
33
8
dB
dB
dB
dB
dB
MHz
Note 1: Production tested at +25 N C; guaranteed by design and characterization at -40 N C and +85 N C.
Note 2: To supply the specified input-voltage-detect levels requires the use of a voltage-divider comprised of 12.7k I and 1.02k I
Q 0.5% tolerance resistors. The voltage being divided is expected to be V OL = 14.75V maximum and V OH = 16.75V minumum.
Note 3: The common input gain step is set by analog control. All gain measurements have only one output connect to each input.
Switch gain measurements do not include cascade inputs as part of the switch signal path.
Note 4: Switch-to-switch gain match is defined as each switch to every other switch gain match. Each switch must be set up with
the same input gain step.
Note 5: 60mV P-P square wave for f IN = 22kHz. For sine wave, the typical minimum is 100mV P-P .
3
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