Parameter Description - Ebyte E78 Series User Manual

Chengdu Ebyte Electronic Technology Co., Ltd
TCXO crystal voltage
configuration
Recommended
operating frequency
Power supply
voltage
Communication
level

1.2 Parameter description

When designing the power supply circuit for the module, it is recommended to reserve more than 30% of the

remaining amount, and the whole machine is conducive to long-term stable operation；
The current required for the instant of launch is large but often because the launch time is extremely short, the total

energy consumed may be smaller；
When customers uses an external antenna, the impedance matching degree between the antenna and the module at

different frequency points will affect the magnitude of the transmission current to varying degrees;
The current consumed by the RF chip in the pure receiving state is called the receiving current. Some RF chips

with communication protocols or developers have loaded some self-developed protocols on the whole machine,
which may cause the receiving current of the test to be too large；
The current in the purely receiving state is often mA level, and the "receiving current" of the μA level needs to be

processed by the developer through software;
The shutdown current is often much smaller than the current consumed by the power supply part of the whole

machine at no load, without being overly demanding;
Since the material itself has a certain error, a single LRC component has an error of ±0.1%. However, since a

plurality of LRC components are used in the entire RF loop, there is a case where error accumulation occurs,
resulting in a difference in emission current and reception current of different modules;
Reducing the transmit power can reduce power consumption to some extent, but reducing the transmit power

emissions for a number of reasons reduces the efficiency of the internal PA.
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E78-400M22S1A User Manual
3.3 V
490 MHz
3.7 V
3.7 V
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