NRF905 NORDIC SEMICONDUCTOR, NRF905 Datasheet - Page 32

• 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

Component
PRODUCT SPECIFICATION
nRF905 Single Chip 433/868/915 MHz Radio Transceiver
11 APPLICATION EXAMPLES
11.1 Differential Connection to a Loop Antenna
Figure 13 nRF905 Application schematic, differential connection to a loop antenna
(433MHz).
Table 15 Recommended external components, differential connection to a loop
antenna (433MHz).
Main office: Nordic Semiconductor ASA
Revision: 1.4
C10
C11
C12
C13
U1
X1
C1
C2
C3
C4
C5
C6
C7
C8
C9
R1
R2
SPI_MISO
SPI_MOSI
PWR_UP
SPI_SC K
SPI_C SN
TRX_C E
uPCLK
TXEN
AM
CD
DR
NP0 ceramic chip capacitor, (Crystal oscillator)
NP0 ceramic chip capacitor, (Crystal oscillator)
NP0 ceramic chip capacitor, (PA supply decoupling)
X7R ceramic chip capacitor, (PA supply decoupling)
NP0 ceramic chip capacitor, (Supply decoupling)
X7R ceramic chip capacitor, (Supply decoupling)
X7R ceramic chip capacitor, (Supply decoupling)
NP0 ceramic chip capacitor, (Supply decoupling)
NP0 ceramic chip capacitor, (Antenna tuning)
NP0 ceramic chip capacitor, (Antenna tuning)
NP0 ceramic chip capacitor, (Antenna tuning)
NP0 ceramic chip capacitor, (Antenna tuning)
NP0 ceramic chip capacitor, (Antenna tuning)
0.1W chip resistor, (Crystal oscillator bias)
0.1W chip resistor, (Reference bias)
nRF905 Transceiver
Crystal, C
L
= 12pF
VDD
C8
33pF
0603
Description
- Vestre Rosten 81, N-7075 Tiller, Norway
1
2
3
4
5
6
7
8
U1
nRF905
TRX_C E
PWR_UP
uPCLK
VDD
VSS
CD
AM
DR
C7
10nF
0603
Page 32 of 42
nRF 905
aaaaaaaa
C1
22pF
0603
aaaaaaaa
R1
1M
X1
16 MHz
VDD_PA
ANT2
ANT1
IR EF
VDD
VSS
VSS
VSS
VDD
C2
22pF
0603
C5
33pF
0603
24
23
22
21
20
19
18
17
QFN32L/5x5
LxWxH =
4.0x2.5x0.8
C6
4.7nF
0603
Size
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
VDD
R2
22K
0603
- Phone [phone] -Fax [phone]
C12
27pF
C13
27pF
C4
3.3nF
0603
J1
Loop Antenna, 433MHz
35x20mm
Value
180
3.3
4.7
3.9
6.8
4.7
22
22
33
10
33
27
27
22
16
1
C3
180pF
C9
3.9pF
C10
6.8pF
C11
4.7pF
60ppm
Tol.
±0.1
±0.1
±0.1
10%
10%
10%
5%
5%
5%
5%
5%
5%
5%
5%
1%
June 2006
Units
MHz
M
k
pF
pF
pF
nF
pF
nF
nF
pF
pF
pF
pF
pF
pF