LT5526 LINER [Linear Technology], LT5526 Datasheet - Page 7

• Manufacturer Part Number: LT5526
• Description: High Linearity, Low Power Downconverting Mixer
• Manufacturer: LINER [Linear Technology]

PI FU CTIO S
BLOCK DIAGRA
NC (Pins 1, 4, 8, 13, 16): Not Connected Internally. These
pins should be grounded on the circuit board for improved
LO-to-RF and LO-to-IF isolation.
RF
These pins must be driven with a differential signal. Each
pin must also be connected to a DC ground capable of
sinking 7.5mA (15mA total). This DC bias return can be
accomplished through the center-tap of a balun or with
shunt inductors. An impedance transformation is required
to match the RF input to 50Ω (or 75Ω).
EN (Pin 5): Enable Pin. When the input 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 enable pin input
current is 55µA for EN = 5V and 0.01µA when EN = 0V.
V
Typical current consumption is 11mA. This pin should be
externally connected to the other V
with 100pF and 0.01µF capacitors.
V
Typical current consumption is 2.5mA. This pin should be
externally connected to the other V
with 100pF and 0.01µF capacitors.
CC1
CC2
+
U
, RF
(Pin 6): Power Supply Pin for the LO Buffer Circuits.
(Pin 7): Power Supply Pin for the Bias Circuits.
–
(Pins 2, 3): Differential Inputs for the RF Signal.
U
U
W
CC
CC
pins and decoupled
pins and decoupled
2
3
RF
RF
17
+
–
5
EXPOSED
PAD
EN
AMPLIFIER
LINEAR
BIAS
7
V
CC2
LO
BALANCED
DOUBLE-
+
15 14
MIXER
6
V
LO
CC1
GND (Pins 9, 12): Ground. These pins are internally
connected to the Exposed Pad for better isolation. They
should be connected to ground on the circuit board,
though they are not intended to replace the primary
grounding through the Exposed Pad of the package.
IF
Signal. An impedance transformation may be required to
match the outputs. These pins must be connected to V
through impedance matching inductors, RF chokes or a
transformer center-tap.
LO
Oscillator Signal. The LO input is internally matched to
50Ω; however, external DC blocking capacitors are re-
quired because these pins are internally biased to approxi-
mately 1.7V DC. Either LO input can be driven with a
single-ended source while connecting the unused input to
ground through a DC blocking capacitor.
Exposed Pad (Pin 17): Circuit Ground Return for the
Entire IC. This must be soldered to the printed circuit board
ground plane.
LO BUFFER
–
SPEED
–
HIGH
–
and IF
, LO
+
(Pins 14, 15): Differential Inputs for the Local
+
(Pins 10, 11): Differential Outputs for the IF
GND
GND
IF
IF
5526 BD
+
–
12
11
10
9
LT5526
7
5526f
CC