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LT5527 Datasheet(PDF) 7 Page - Linear Technology

Part # LT5527
Description  400MHz to 3.7GHz 5V High Signal Level Downconverting Mixer
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT5527 Datasheet(HTML) 7 Page - Linear Technology

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LT5527
7
5527fa
PIN FUNCTIONS
NC (Pins 1, 2, 4, 8, 13, 14, 16): Not Connected Internally.
These pins should be grounded on the circuit board for
improved LO-to-RF and LO-to-IF isolation.
RF (Pin 3): Single-Ended Input for the RF Signal. This pin
is internally connected to the primary side of the RF input
transformer, which has low DC resistance to ground. If
the RF source is not DC blocked, then a series blocking
capacitor must be used. The RF input is internally matched
from 1.7GHz to 3GHz. Operation down to 400MHz or up
to 3700MHz is possible with simple external matching.
EN (Pin 5):
Enable Pin. When the input enable voltage is
higher than 3V, the mixer circuits supplied through Pins 6,
7, 10 and 11 are enabled. When the input voltage is less
than 0.3V, all circuits are disabled. Typical input current
is 50μA for EN = 5V and 0μA when EN = 0V. The EN pin
should not be left floating. Under no conditions should the
EN pin voltage exceed VCC + 0.3V, even at start-up.
VCC2 (Pin 6): Power Supply Pin for the Bias Circuits.
Typical current consumption is 2.8mA. This pin should
be externally connected to the VCC1 pin and decoupled
with 1000pF and 1μF capacitors.
VCC1 (Pin 7): Power Supply Pin for the LO Buffer Circuits.
Typical current consumption is 23.2mA. This pin should
be externally connected to the VCC2 pin and decoupled
with 1000pF and 1μF capacitors.
GND (Pins 9, 12): Ground. These pins are internally
connected to the backside ground for improved isola-
tion. They should be connected to the RF ground on the
circuit board, although they are not intended to replace
the primary grounding through the backside contact of
the package.
IF, IF+ (Pins 10, 11):
Differential Outputs for the IF
Signal. An impedance transformation may be required to
match the outputs. These pins must be connected to VCC
through impedance matching inductors, RF chokes or a
transformer center tap.
LO (Pin 15): Single-Ended Input for the Local Oscillator
Signal. This pin is internally connected to the primary side
of the LO transformer, which is internally DC blocked. An
external blocking capacitor is not required. The LO input is
internally matched from 1.2GHz to 5GHz. Operation down
to 380MHz is possible with simple external matching.
Exposed Pad (Pin 17): Circuit Ground Return for the
Entire IC. This must be soldered to the printed circuit
board ground plane.
BLOCK DIAGRAM
15
7
11
3
6
5
10
DOUBLE-BALANCED
MIXER
LINEAR
AMPLIFIER
LIMITING
AMPLIFIERS
LO
VCC2
VCC1
EN
IF+
12
GND
17
EXPOSED
PAD
IF
9
GND
5527 BD
BIAS
RF
VCC1
REGULATOR


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