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參數(shù)資料
| 型號： | LT5528 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 400MHz to 3.7GHz High Signal Level Downconverting Mixer |
| 中文描述： | 400MHz至3.7GHz高信號電平下變頻混頻器 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 221K |
| 代理商： | LT5528 |
7
LT5527
5527f
PIU
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
50
μ
A for EN = 5V and 0
μ
A when EN = 0V. The EN pin should
not be left floating. Under no conditions should the EN pin
voltage exceed V
CC
+ 0.3V, even at start-up.
V
CC2
(Pin 6):
Power Supply Pin for the Bias Circuits.
Typical current consumption is 2.8mA. This pin should be
externally connected to the V
CC1
pin and decoupled with
1000pF and 1
μ
F capacitors.
V
CC1
(Pin 7):
Power Supply Pin for the LO Buffer Circuits.
Typical current consumption is 23.2mA. This pin should
be externally connected to the V
CC2
pin and decoupled
with 1000pF and 1
μ
F capacitors.
GND (Pins 9, 12):
Ground. These pins are internally
connected to the backside ground for improved isolation.
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 V
CC
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 DIAGRA
15
7
11
3
6
5
10
DOUBLE-BALANCED
MIXER
LINEAR
AMPLIFIER
LIMITING
AMPLIFIERS
LO
V
CC2
V
CC1
EN
IF
+
12
GND
17
EXPOSED
PAD
IF
–
9
GND
5525 BD
BIAS
RF
V
CC1
REGULATOR
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