RF2480 RFMD, RF2480 Datasheet - Page 4

• Manufacturer Part Number: RF2480
• Description: IC QUADRATURE MODULATOR 16-SOIC
• Manufacturer: RFMD

Specifications of RF2480

• Function: Modulator
• Lo Frequency: 800MHz ~ 2.5GHz
• Rf Frequency: 800MHz ~ 2.5GHz
• P1db: 3dBm
• Noise Floor: -158dBm/Hz
• Output Power: -3dBm
• Current - Supply: 50mA
• Voltage - Supply: 4.5 V ~ 6 V
• Test Frequency: 2GHz
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q5870916A

RF2480
4 of 8
Pin
10
11
12
13
14
1
2
3
4
5
6
7
8
9
Function
RF OUT
Q REF
GND2
GND2
GND2
GND3
GND1
GND1
GND1
VCC1
VCC2
I REF
PD
LO
Description
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 3.0V is recommended.
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 balanced
mode. This will increase the gain.
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.
Reference voltage for the Q mixer. This voltage should be the same as the
DC voltage supplied to the Q SIG pin. A voltage of 3.0V is recommended.
See pin 1 for more details.
Ground connection of the LO phase shift network. This pin should be con-
nected directly to the ground plane.
Same as pin 3.
Same as pin 3.
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 not required.
Power supply for all circuits except the RF output stage. An external capaci-
tor 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.
Ground connection for the RF output stage. This pin should be connected
directly to the ground plane.
Power supply for the RF output amplifier. An external capacitor is needed if
no other low frequency bypass capacitor is near by.
Ground connection for the LO and baseband amplifiers, and for the mixers.
This pin should be connected directly to the ground plane.
Same as pin 12.
Same as pin 12.
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
Q SIG
I SIG
P D
100 Ω
100 Ω
L O
425 Ω
425 Ω
2 0 0 Ω
Rev A4 DS060329
425 Ω
425 Ω
RF OUT
100 Ω
100 Ω
I REF
Q REF
V
C C