NRF905 NORDIC SEMICONDUCTOR, NRF905 Datasheet - Page 34

• Manufacturer Part Number: NRF905
• Description: IC, TRANSCEIVER, 430 928MHZ, SMD
• Manufacturer: NORDIC SEMICONDUCTOR

Specifications of NRF905

• Transmitting Current: 9mA
• Data Rate: 50Kbps
• Frequency Range: 430MHz To 928MHz
• Modulation Type: GFSK
• Sensitivity Dbm: -100dBm
• Rf Ic Case Style: QFN
• No. Of Pins: 32
• Supply Voltage Range: 1.9V To 3.6V
• Output Power: 10dBm
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PRODUCT SPECIFICATION
nRF905 Single Chip 433/868/915 MHz Radio Transceiver
11.3 Single ended connection to 50 antenna
Figure 15 433MHz operating nRF905 Application schematic, single ended connection
to 50 antenna by using a differential to single ended matching network.
Figure 16 868-915MHz operating nRF905 Application schematic, single ended
connection to 50 antenna by using a differential to single ended matching network.
It is recommended to add pull up or pull down resistors on signals that can enter a
floating state. For the nRF905 it is recommended to have pull up on the CSN signal
and pull down on the MOSI and SCK signal.
Main office: Nordic Semiconductor ASA
Revision: 1.4
SPI_MISO
SPI_MOSI
PWR_UP
SPI_SCK
SPI_CSN
TRX_CE
uPCLK
TXEN
AM
CD
DR
VDD
C8
33pF
1
2
3
4
5
6
7
8
U1
nRF905
TRX_CE
PWR_UP
uPCLK
VDD
VSS
CD
AM
DR
- Vestre Rosten 81, N-7075 Tiller, Norway
C7
10nF
nRF905
C1
22pF
R1
1M
aaaaaaaa
X1
16 MHz
VDD_PA
ANT2
ANT1
VDD
IREF
VSS
VSS
VSS
VDD
Page 34 of 42
C2
22pF
C5
33pF
24
23
22
21
20
19
18
17
C6
4.7nF
VDD
R2
22K
C4
3.3nF
C10
18pF
C9
18pF
C11
Optional
- Phone [phone] -Fax [phone]
L1
12nH
L2
39nH
L3
39nH
C12
6.8pF
C3
180pF
June 2006
C13
Optional
50 ohm RF I/O