RF2498PCBA-41X View Datasheet(PDF) - RF Micro Devices
Part Name
Description
MFG CO.
'RF2498PCBA-41X' PDF : 22 Pages View PDF
RF2498
Pin Function Type Description
1
GPS+
AO GPS IF output. Open collector.
Interface Schematic
GPS+
GPS-
2
GPS-
AO GPS IF output. Open collector.
3
CDMA+
AO CDMA IF output. Open collector.
See pin 1.
CDMA+
CDMA-
4
CDMA-
AO CDMA IF output. Open collector.
See pin 3.
5
FM+
AO FM IF output. Open collector. “Current combiner” IF interface to
FM+
FM-
SAW filter recommended. (See “IF Output Matching Network” sec-
tion.)
6
FM-
AO FM IF output. Open collector. “Current combiner” IF interface to See pin 5.
SAW filter recommended. (See “IF Output Matching Network” sec-
tion.)
7
VCC2
P VCC connection for internal LO amplifiers. Internal RF bypass
capacitor. External bypass capacitor between 1nF and 47nF
required.
8
LO IN
AI LO single-end input. Matched to 50Ω.
LO IN
70 Ω
9
LO OUT
AO LO output. Internal DC block.
10
/2 SELECT
DI Logic input. Low enables /2 circuitry in cellular mode.
See pin 11.
The divider is disabled when BAND SEL (pin 27) is high, regard-
less of the state of pin 10. The divider can only be enabled when
BAND SEL is low and pin10 is low. Pin 10 can be tied to a low
state allowing BANDSEL (pin 27) to control the LO divider func-
tion, if using a single LO input source.
11
TX BUFF
DI Logic input. High enables TX LO output buffer amplifiers.
ENABLE
TX BUF
12 PCS RFA VCC P VCC connection for PCS mixer preamplifier.
13 PCS MIX IN AI PCS mixer RF single-end input.
PCS MIX IN
14 CELL MIX IN AI Cellular mixer RF single-end input. Matched to 50Ω.
CELL MIX IN
10 of 22
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A3 DS030711
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