參數(shù)資料
型號(hào): LT5512EUF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 無繩電話/電話
英文描述: 1kHz-3GHz High Signal Level Down-Converting Mixer
中文描述: TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PQCC16
封裝: 4 X 4 MM, PLASTIC, MO-220WGGC, QFN-16
文件頁數(shù): 6/12頁
文件大?。?/td> 267K
代理商: LT5512EUF
LT5512
6
5512f
PIU
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
+
, RF
(Pins 2, 3):
Differential Inputs for the RF Signal.
These pins must be driven with a differential signal. Each
pin must be connected to a DC ground capable of sinking
15mA (30mA total). This DC bias return can be accom-
plished through the center-tap of a balun, or with shunt
inductors. An impedance transformation is required to
match the RF input to 50
(or 75
).
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 50
μ
A for EN = 5V and 0
μ
A when EN = 0V.
V
CC1
(Pin 6):
Power Supply Pin for the LO Buffer Circuits.
Typical current consumption is 22mA. This pin should be
externally connected to the other V
CC
pins, and decoupled
with 100pF and 0.01
μ
F capacitors.
V
CC2
(Pin 7):
Power Supply Pin for the Bias Circuits.
Typical current consumption is 4mA. This pin should be
externally connected to the other V
CC
pins, and decoupled
with 100pF and 0.01
μ
F capacitors.
GND (Pins 9 and 12):
Ground. These pins are internally
connected to the backside ground for better isolation.
They should be connected to 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
, LO
+
(Pins 14, 15):
Differential Inputs for the Local
Oscillator Signal. They can also be driven single-ended by
connecting one to an RF ground through a DC blocking
capacitor. These pins are internally biased to 2V; thus, DC
blocking capacitors are required. An impedance transfor-
mation is required to match the LO input to 50
(or 75
).
GROUND (Pin 17) (Backside Contact):
Circuit Ground
Return for the Entire IC. This must be soldered to the
printed circuit board ground plane.
V
CC1
V
CC2
RF
+
RF–
LO
+
LO–
IF
+
IF–
2
17
9
10
11
12
3
15
14
6
7
5
LINEAR
AMPLIFIER
HIGH-SPEED
LO BUFFER
BIAS
GND
GND
EN
BACKSIDE
GROUND
DOUBLE-BALANCED
MIXER
5512 BD
15mA
15mA
Figure 1.
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