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NRF905

2 years ago 893
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Description

1、Module description: NRF905 is the Norway VLSI Nordic company introduced a single-chip RF transceiver, the operating voltage of 1.9 ~ 3.6V, 32 pin QFN package(5 * 5mm), working in the 433/868/915MHz three ISM (industrial, scientific and medical) channel, the channel between the conversion time is less than 650us.
nRF905 consists of a frequency synthesizer, a receiver demodulator, a power amplifier, a crystal oscillator and a modulator, Shockbursttm mode, automatic processing of the header and CRC (cyclic redundancy check), the use of the SPI interface and micro controller communication, configuration Often convenient. In addition, its power consumption is very low, with the output power of 10dBm when the current is only 11mA, working at the receiving mode when the current
For 12.5mA, built in idle mode and shutdown mode, easy to achieve energy saving. NRF905 is suitable for wireless data communication, wireless alarm and security System, wireless lock, wireless monitoring, home automation and toys, and many other fields. 2、Function Description: The real single chip 32 pin package GFSK transceiver chip works in the energy saving mode of ShockBurstTM working voltage is 1.9 ~ 3.6V. Multi channel work - ETSI/FCC compatible channel conversion time <650us
Low cost Bill of Material Extremely (BOM) without the addition of SAW (sound meter) filter
Adjustable output power up to 10dBm (MW) for carrier detection protocol before transmission
When the effective data packets sent / received the data ready signal to the listening to the arrival packet address matching data automatic processing of prefix and CRC automatic retransmission packet
Consumption is very low, with the output power of -10dBm emission when the current is only 11mA working in the receiving mode when the current is 12.5mA. 3、Description of each function module:

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4、Components and PCB diagram before welding:

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5、Physical map after welding:

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Documents

NRF905

NRF905

BOM

ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price LCSC Assembly Mounted SeeedStudio
1 nRF905 U1 QFN32G-0.5-5X5MM 1 nRF905 SeeedStudio 317070016
2 33PF C1,C5,C10 C-0603 3
3 16M X 16m 1
4 10PF C2,C3 C-0603 2
5 1M R1 3-0603 1
6 3.3nF C4 C-0603 1
7 22K R2 3-0603 1
8 4.7uF C6 C1206 1
9 10nF C7 C-0603 1
10 18PF C8,C9 C-0603 2
11 39nH L1,L3 3-0603 2
12 12nH L2 3-0603 1
13 180PF C11 C-0603 1
14 6.8PF C12,C13 C-0603 2
15 天线座 U2 天线弯头 1
16 HDR2X7 P1 HDR2X7 1

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