lt5579 Linear Technology Corporation, lt5579 Datasheet - Page 9

• Manufacturer Part Number: lt5579
• Description: 1.5ghz To 3.8ghz High Linearity Upconverting Mixer
• Manufacturer: Linear Technology Corporation

PIN FUNCTIONS
GND (Pins 1, 2, 5-7, 12-14, 16-18, 19-21, 23, 24): Ground
Connections. These pins are internally connected to the
exposed pad and should be soldered to a low impedance
RF ground on the printed circuit board.
IF
mode voltage on these pins is set internally to 570mV. The
DC current from each pin is determined by the value of
an external resistor to ground. The maximum DC current
through each pin is 60mA.
V
pins are connected together internally. Typical current
consumption is 226mA. These pins should be connected
together on the circuit board with external bypass capaci-
tors of 1000pF , 100pF and 10pF located as close to the
pins as possible.
CC
+
, IF
(Pins 8-11): Power Supply Pins for the IC. These
–
(Pins 3, 4): Differential IF Input. The common
RF (Pin 15): Single-Ended RF Output. This pin is con-
nected to an internal transformer winding. The opposite
end of the winding is grounded internally. An impedance
transformation may be required to match the output and a
DC decoupling capacitor is required if the following stage
has a DC bias voltage present.
LO (Pin 22): Single-Ended Local Oscillator Input. An internal
series capacitor acts as a DC block to this pin.
Exposed Pad (Pin 25): PGND. Electrical and thermal
ground connection for the entire IC. This pad must be
soldered to a low impedance RF ground on the printed
circuit board. This ground must also provide a path for
thermal dissipation.
LT5579
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5579f