RF2484PCK RFMD, RF2484PCK Datasheet - Page 5

• Manufacturer Part Number: RF2484PCK
• Description: KIT EVAL FOR RF2484
• Manufacturer: RFMD
• Type: Modulatorr

Specifications of RF2484PCK

• Frequency: 800MHz ~ 2.2GHz
• For Use With/related Products: RF2484
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 689-1041

Rev A8 DS080403
Pin
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
Function
RF OUT
Q SIG
I REF
I SIG
GND
GND
GND
GND
GND
GND
GND
VCC
VCC
PD
LO
Description
Ground connection. This pin should be connected directly to the ground
plane.
Same as pin 1.
Same as pin 1.
The input of the phase shifting network. This pin has an internal DC block-
ing capacitor. This port is voltage-driven so matching at different frequen-
cies is generally not required.
Same as pin 1.
Power supply. An external capacitor is needed if no other low frequency
bypass capacitor is nearby.
Power Down control. When this pin is "low," all circuits are shut off. A "low"
is typically 1.2V or less at room temperature.When this pin is "high" (V
all circuits are operating normally. If PD is below V
performance will be degraded. Operating in this region is not recom-
mended, although it might be useful in some applications where power
control is required.
RF Output. This pin has an internal DC blocking capacitor. At some frequen-
cies, external matching may be needed to optimize output power. A small
amount of DC current may be present at this output. As a result, if the volt-
age at this pin is measured using a high impedance probe, some DC volt-
age may be observed at this output.
Same as pin 1.
Same as pin 6.
Same as pin 1.
Same as pin 1.
Baseband input to the Q mixer. This pin is DC coupled. The input drive level
determines output power and linearity performance; for better carrier sup-
pression, sideband suppression, and dynamic range, the drive level should
be as high as possible to meet the required linearity performance. The rec-
ommended DC level for this pin is 4.1V.
For optimum carrier suppression, the DC voltages on I REF, Q REF, I SIG
and Q SIG should be adjusted slightly to compensate for inherent undes-
ired internal DC offsets; for optimum sideband suppression, phase and sig-
nal amplitude on IREF, Q REF, I SIG and Q SIG should be adjusted slightly to
compensate for inherent undesired internal offsets. See RFMD AN0001
for more detail.
Baseband input to the I mixer. This pin is DC coupled. The input drive level
determines output power and linearity performance; for better carrier sup-
pression, sideband suppression, and dynamic range, the drive level should
be as high as possible to meet the required linearity performance. The rec-
ommended DC level for this pin is 4.1V; see pin 13 for more information.
Reference voltage for the I mixer. This voltage should be the same as the
DC voltage supplied to the I SIG pin. A voltage of 4.1V is recommended;
see pin 13 for more information.
The SIG and REF inputs are inputs of a differential amplifier. Therefore the
REF and SIG inputs are interchangeable. If swapping the I SIG and I REF
pins, the Q SIG and Q REF also need to be swapped to maintain the correct
phase. It is also possible to drive the SIG and REF inputs in a differential
mode. This will increase the gain.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ([phone] or [e-mail].
CC
, output power and
CC
),
Interface Schematic
P D
L O
RF2484
1 0 0 Ω
1 0 0 Ω
1 0 0 Ω
2 0 0 Ω
1 p
1 p
1 p
RF OUT
V
V
V
V
C C
C C
C C
C C
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