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NXP
NXP Semiconductors. NXP
1SV254_ Datasheet PDF : 0 Pages
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The NXP BGA7204 and BGA7210 are monolithic digital
variable-gain amplifiers (VGAs) that operate over an extremely
wide range with high linearity and high output power.
Designed for the transmit path of wireless architectures, these
VGAs can be used to control the power level to the power
amplifier. The up-converted signals are fed to the VGA, and
thus help compensate for variations in cell load and the
presence of aging infrastructure equipment.
The BGA7204 operates in the range between 0.4 and 2.75 GHz,
while the BGA7210 operates between 0.7 and 3.8 GHz. By
supporting more than 2 GHz of bandwidth, these devices can
be used to populate several frequency bands.
An integrated power-save mode makes it possible to reduce
consumption even more, to just 15 mA during a receive slot.
This can effectively reduce the current consumption in Time
Division Duplexing (TDD) systems up to 45%.
The BGA7210 builds on the BGA7204 by adding flexible
current setting across its two amplifiers, depending on the
attenuation state. The serial peripheral interface is used to set
the attenuation state, and, using a similar method, to set the
current through the first and second amplifiers. The desired
configuration is set by software and enables current savings of
as much as 75 mA.
Higher output power, higher peak gain, and smaller attenuator
step sizes enable engineers to use fewer components and
provide greater control to maintain and optimize performance
in the transmit chain.
Smart routing (with no connection crosses) reduces the number
of board connections, simplifies design-in, and decreases the
design footprint by 25%. The monolithic design increases
reliability and ensures high quality.
Schematic of BGA7210 evaluation board (OM7921)
VSUP
C23
L1
C22
C12
C26
PUPMXG/
C14
PWRDN CLK SERIN SS SEROUT VDDD VCC1
24
23 22
21 20
19
17
16
VDDA
C18
15 VCC2
C17
C1 RF_IN 29
12 RF_OUT
C25
C24
L2
C27
Csh
RF_OUT
aaa-000665
Digital VGAs
Type
number
Package
BGA7204 SOT617-3
BGA7210 SOT617-3
frange
[min]
(MHz)
400
700
1450
2100
700
1400
1700
2200
3400
frange
[max]
(MHz)
@ VCC
(V)
@ ICC
[typ]
(mA)
700
5
115
1450
5
115
2100
5
115
2750
5
115
1400
5
185
1700
5
185
2200
5
185
2800
5
185
3800
5
185
Gp @
minimum
attenuation
(dB)
18.5
18.5
17.5
16.5
30.0
29.5
29.0
28.0
26.0
Attenuation
range
(dB)
31.5
31.5
30.5
30.0
31.5
31.5
31.5
30.5
29.5
IP3O
[typ]
(dBm)
38.0
37.5
36.0
34.0
39.0
37.0
35.0
35.0
27.0
PL(1dB)
[typ]
(dBm)
21.0
21.0
20.5
20.0
21.0
21.0
21.0
23.0
19.0
NF
[typ]
(dB)
7.0
6.5
6.5
7.0
6.5
6.5
6.5
7.0
8.0
NXP Semiconductors RF Manual 16th edition
45
 

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