RF25A-12 データシートの表示（PDF） - Conexant Systems
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RF25A-12 Datasheet PDF : 17 Pages
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RF25A
Pin #
Name
34
VCC_MIX
35
MIX_IN
36
IF_TRAP
Rx ASIC
Table 1. RF25A Pin Assignments and Signal Descriptions (3 of 3)
Description
Voltage supply pin for the mixers. An RF bypass capacitor should be connected from this pin
to ground. It should be connected as close to the device as possible with very short trace
lengths.
Cellular mixer input.
The parallel LC circuit is tuned to the cellular IF frequency.
Equivalent Circuit
Pin 37
37
MIXEMIT
38
NC
39
LNA_OUT
40
NC
Typical ground connection, but a 1.5 nH emitter degeneration can be used to improve mixer
input IP3.
No connection.
This is an open collector LNA output. An inductor must be connected to VCC. The matching is
done externally to the chip.
See Pin 35
No connection.
6
Conexant – Preliminary.
1011110A
Proprietary Information
August 4, 2000
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