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Chengdu Ebyte Electronic Technology Co., Ltd

E21-400G37 User Manual

Copyright ©2012–2019, hengdu Ebyte Electronic Technology Co., Ltd

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Note:

1. TXEN and RXEN cannot be opened at the same time at any time, which may cause direct damage to

PA module.

2. The bottom bonding pad is connected to the internal GND, which needs to be coated with silicone

grease for heat dissipation or welded to the base plate to enhance heat dissipation.

Chapter 4 Basic Operation

4. 1 Hardware design

It is recommended to use DC regulated power supply to supply power to the module. The ripple coefficient

of the power supply should be as small as possible. The module should be reliably grounded. It is recommended

to use power supply above 20W;

Please pay attention to the correct connection of the positive and negative poles of the power supply. If

the connection is reversed, the module may be permanently damaged;

Please check the power supply to ensure that it is between the recommended power supply voltages. If it exceeds

the maximum value, the module will be permanently damaged;

Please check the stability of the power supply, and the voltage cannot fluctuate significantly and frequently;

When designing power supply circuit for modules, it is often recommended to reserve more than 30% margin,

which is conducive to long-term stable operation of the whole machine;

The module shall be as far away from power supply, transformer, high-frequency wiring and other parts with

large electromagnetic interference as possible;

High frequency digital wiring, high frequency analog wiring and power wiring must avoid the lower part of

the module. If it is really necessary to pass under the module, suppose that the module is welded on the

Top Layer, and the top layer of the module contact part is paved with copper (all are paved with copper and

well grounded), and must be close to the digital part of the module and routed on the Bottom Layer;

If the module is welded or placed in the top layer, it is also wrong to randomly route in the bottom layer

or other layers, which will affect the stray and receiving sensitivity of the module to varying degrees;

If there are components with large electromagnetic interference around the module, it will also greatly affect

the performance of the module. According to the intensity of the interference, it is recommended to keep

away from the module properly. If circumstances permit, appropriate isolation and shielding can be done;

Assuming that there are wiring (high-frequency digital, high-frequency analog, power wiring) with large

electromagnetic interference around the module will also greatly affect the performance of the module, it

is recommended to keep away from the module appropriately according to the intensity of the interference,

and appropriate isolation and shielding can be done if circumstances permit;

The antenna installation structure has a great impact on the module performance. It is necessary to ensure

that the antenna is exposed, preferably vertically upwards. When the module is installed inside the enclosure,

high-quality antenna extension cable can be used to extend the antenna outside the enclosure;

The antenna must not be installed inside the metal shell, which will greatly weaken the transmission distance.

Pay attention to the good grounding, large area of grounding, small power ripple, increase the filter capacitor

and try to be close to the VCC and GND pins of the module;

Содержание E21-400G37S

Страница 1: ...E21 400G37S User Manual ISM band 433 470MHz patch type PA LNA amplifier module...

Страница 2: ...c curve 4 Chapter 3 Mechanical Dimensions and Pin Definitions 6 Chapter 4 Basic Operation 7 4 1 Hardware design 7 4 2 Software Edit 8 Chapter 5 Basic Application 8 5 1 Basic circuit 8 Chapter 6 FAQ 9...

Страница 3: ...el or otherwise The test data obtained in this paper are all from the test of the Yibaite laboratory and the actual results may be slightly different It is hereby declared that all trade names tradema...

Страница 4: ...for receiving and transmitting control switching SOP chip design mode ultra small size very easy to embed the entire scheme is designed according to industrial grade and the back is large area of bar...

Страница 5: ...4 7 5 7 6 7 5V is recommended to ensure the best performance Operating temperature 40 25 85 Industrial grade design Operating frequency band MHz 410 493 ISM band Power waste Emission current mA 1400...

Страница 6: ...Chengdu Ebyte Electronic Technology Co Ltd E21 400G37 User Manual Copyright 2012 2019 hengdu Ebyte Electronic Technology Co Ltd 5 2 3 1 Power 2 3 2 Smith and SWR...

Страница 7: ...ransmission mode effective at high level support 3 3V 5V level 8 RXEN Input Receive mode enable active at high level support 3 3V 5V level 9 GND Ground wire connected to reference ground 10 PIN Input...

Страница 8: ...dule If it is really necessary to pass under the module suppose that the module is welded on the Top Layer and the top layer of the module contact part is paved with copper all are paved with copper a...

Страница 9: ...and low level select mode support 3 3 5V level L L Sleep mode When the module enters the sleep mode PA and LNA do not work L H Receiving mode When the module enters the receiving mode PA does not work...

Страница 10: ...the module is poor or the quality of the antenna itself is poor 6 2 Modules are easily damaged Please check the power supply to ensure that it is between the recommended power supply voltages If it ex...

Страница 11: ...90 sec Peak temperature Tp Peak temperature 220 235 230 250 Aveage ramp down rate Tp to Tsmax Average falling rate 6 second max 6 second max Time 25 to peak temperature Time from 25 to peak temperatur...

Страница 12: ...cellent performance and reasonable price Model Type Frequency Gain Size Feeder Interface Feature MHz dBi cm cm TX433 XP 200 Sucker 400 470 4 1 9 200 SMA J Ultra short straight omnidirectional antenna...

Страница 13: ...ethod Revision History Version Revision date Description Maintainer 1 0 2021 8 31 First published LJ 1 1 2022 10 12 Parameter confirmation Yan About us Hotline 4000 330 990 Telephone 028 61399028 Supp...

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