NRF401-IC ETC, NRF401-IC Datasheet - Page 8

• Manufacturer Part Number: NRF401-IC
• Description: 433mhz Single Chip RF Transceiver
• Manufacturer: ETC

PRODUCT SPECIFICATION
nRF401 Single Chip RF Transceiver
An additional notch filter (L and C) at the 50
dependent on the application requirements (see application note nAN400-05).
A single ended antenna may also be connected to nRF401 using an 8:1 impedance RF
transformer. The RF transformer must have a centre tap at the primary side for VDD
supply.
RF output power
The external bias resistor R3 connected between the RF_PWR pin and VSS sets the
output power. The RF output power may be set to levels up to +10dBm. In Figure 8
the output power is plotted for power levels down to, but not limited to, -8.5dBm for a
differential load of 400 . DC power supply current versus external bias resistor value
is shown in Figure 9.
Nordic VLSI ASA -
Revision: 1.5
Figure 9. Total chip current consumption vs. external power setting resistor (R3) for
Figure 8. RF output power vs. external power setting resistor (R3) for nRF401.
-10
30,0
25,0
20,0
15,0
10,0
10
-2
-4
-6
-8
5,0
0,0
8
6
4
2
0
0
0
Vestre Rosten 81, N-7075 Tiller, Norway -
20
20
22
22
27
27
33
40
33
40
39
39
47
47
60
56
60
56
68
Total Chip Current
68
RF Output Power
nRF401.
Page 8 of 18
80
80
Resistor Value [k ]
Resistor Value [k ]
82
82
100
100
100
100
RF input/output may be necessary
120
120
120
120
Phone [phone] - Fax [phone]
140
140
150
150
160
160
180
180
180
180
200
200
May 2000