CXA1851 SONY [Sony Corporation], CXA1851 Datasheet - Page 2

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

Pin No.
Pin Description
1
2
3
4
5
6
7
8
9
GND
RF BYPASS
RF INPUT
PEAKING
OUT
P/S
(for DOWN
CONV.)
P/S
(for UP
CONV.)
V
(for Up
CONV.)
RF OUTPUT
GND
CC
Symbol
(Vcc=2.7V)
voltage (V)
Typical pin
2.7 to 4.5
0 to 4.5
0 to 4.5
0.12
0.0
1.1
0.9
2.7
0.0
REG
3
5
6
Equivalent circuit
REG
4
—2—
8
REG
2
GND pin for the down converter.
MIX input by-pass pin for the down
converter.
RF input pin for the down
converter. Because of high
impedance, a 4.7 nH external chip
inductor should be used for
impedance matching.
Emitter pin for the low-noise
amplifier. Connect an approximate-
ly 3 pF chip capacitor and an
approximately 22Ω chip resistor in
series to the GND.
Power saving control pin for the
down converter.
OFF when Vp/s≤1.0 V; ON when
Vp/s≥1.8 V
Power saving control pin for the up
converter.
OFF when Vp/s≤1.0 V; ON when
Vp/s≥1.8 V
Power supply for the up converter.
RF output pin for the up converter.
Connect this pin to the Pin 7 power
supply via the 15 nH chip inductor.
GND pin for the up converter RF
amplifier.
Description
CXA1851N