UM10480
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© NXP B.V. 2011. All rights reserved.
User manual
Rev. 2 — 26 July 2011
6 of 13
NXP Semiconductors
UM10480
Variable gain amplifier BGA7210
5.2 Quick
tour
The customer software offers advanced features for controlling the current and
attenuation of the BGA7210. The software also provides a tick box for saving power and a
tick box for automatically selecting the optimal current per attenuation setting, yielding
maximum linearity.
5.3 Setting
current
The current to each amplifier can be set either automatically or manually.
•
Automatically: depending on the attenuator setting, each amplifier current setting is
selected automatically. This mode optimizes current consumption without
compromising linearity
•
Manually: each amplifier current can be set manually
5.4 Setting
attenuation
There are three methods available for setting attenuation in the range 0 dB to 31.5 dB
using:
•
the attenuator entry
•
attenuation slider
•
0.5 dB step button
5.5 Power
save
In Power save mode, the RF blocks are switched off but it is still possible to communicate
with the chip.
Fig 3.
User interface
019aac407
increase attenuation
attenuation slider
decrease attenuation
power save mode
attenuation entry
amplifier 2 current
amplifier 1 current
set optimal currents
device version
USB status
write status
