MAX2368EGM 查看數據表（PDF） - Maxim Integrated
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MAX2368EGM Datasheet PDF : 22 Pages
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Complete Dual-Band
Quadrature Transmitters
PIN
MAX2366 MAX2367 MAX2368
NAME
Pin Description (continued)
FUNCTION
32, 33
32, 33
—
TANKH-, Differential Tank Pins for the High-Frequency IF VCO. These pins are internally
TANKH+ biased to +1.6V.
34, 35
—
36
36
—
N.C.
No Connection. Leave these pins floating.
Reference Frequency Input. REF is internally biased to VCC - 0.7V and must
36
REF
be AC-coupled to the reference source. This is a high-impedance port
(25kΩ II 3pF).
Supply for the IF Charge Pump. This supply can differ from the system VCC.
37
37
37
VCC
Bypass as close to the pin as possible. The bypass capacitor must not share
its vias with any other branches.
High-Impedance Output of the IF Charge Pump. Connect to the tune input of
38
38
38
IFCP
the IF VCOs through the IF PLL loop filter. Keep the line from IFCP to the tune
input as short as possible to prevent spurious pickup, and connect the loop
filter as close to the tune input as possible.
39
39
39
VCC
Supply Pin for Digital Circuitry. Bypass as close to the pin as possible. The
bypass capacitor must not share its vias with any other branch.
High-Impedance Output of the RF Charge Pump. Connect to the tune input of
40
40
40
RFCP
the RF VCOs through the RF PLL loop filter. Keep the line from this pin to the
tune input as short as possible to prevent spurious pickup, and connect the
loop filter as close to the tune input as possible.
41
41
41
VCC
42
42
42
43
43
—
44
—
44
45, 46, 48 45, 46, 48 45, 46, 48
RFPLL
LOH
LOL
GND
47
47
—
RFH1
Supply for the RF Charge Pump. This supply can differ from the system VCC.
Bypass as close to the pin as possible. The bypass capacitor must not share
its vias with any other branches.
RF PLL Input. AC-couple this port to the RF VCO.
High-band RF LO Input Port. AC-couple to this port.
Low-band RF LO Input Port. AC-couple to this port.
Ground. Connect to PC board ground plane.
Transmitter RF Output for PCS Band (1700MHz to 2000MHz). This open-col-
lector output requires a pullup inductor to the supply voltage. The pullup
inductor may be part of the output matching network and may be connected
directly to the battery.
Exposed Exposed Exposed
paddle
paddle
paddle
GND
DC and AC GND Return for the IC. Connect to PC board ground plane using
multiple vias.
10 ______________________________________________________________________________________
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