CXA1851 SONY [Sony Corporation], CXA1851 Datasheet - Page 3

• Manufacturer Part Number: CXA1851
• Description: Up/Down Converter for 900 MHz-Band Mobile Communications
• Manufacturer: SONY [Sony Corporation]

Pin No.
10
11
12
13
14
15
16
17
18
19
20
MIX OUT1
MIX OUT2
GND
IF BYPASS
IF INPUT
OSC INPUT
(for UP
CONV.)
OSC
BYPASS
(for UP
CONV.)
OSC
BYPASS
(for DOWN
CONV.)
OSC
BYPASS
(for DOWN
CONV.)
Vcc
(for DOWN
CONV.)
IF OUTPUT
Symbol
voltage (V)
Typical pin
2.7 to 4.5
1.03
1.03
1.85
1.85
1.45
2.3
2.3
0.0
1.8
1.8
14
15
18
Equivalent circuit
10
—3—
11
20
16
17
REG
13
MIX output pin for the up
converter.
MIX output pin for the up
converter. Connect an approxi-
mately 4.7 nH chip inductor and
an approximately 3.5 pF chip
capacitor between this pin and
Pin 10 to form a tank circuit.
GND pin for the oscillator buffer
amplifier and mixer blocks of the
up converter.
IF input by-pass pin for the up
converter.
IF input pin for the up converter.
Because of high impedance, an
external matching circuit is
necessary which consists of a 220
nH
approximately
capacitor.
Oscillator input pin for the up
converter. A matching circuit
consisting of a 51Ω resistor is
necessary.
Oscillator input by-pass pin for the
up converter.
Oscillator input by-pass pin for the
down converter.
Oscillator input pin for the down
converter. A matching circuit
consisting of a 51Ω resistor is
necessary.
Power supply for the down
converter.
IF output pin for the down
converter.
chip
Description
inductor
1.5
pF
CXA1851N
and
chip
an