NRF9E5 Datasheet, PDF (26/104 Pages) List of Unclassifed Manufacturers – 433/868/915MHz RF Transceiver with Embedded 8051 Compatible Microcontroller and 4 Input, 10 Bit ADC

PRODUCT SPECIFICATION
nRF9 E5 Single Chip Transceiver with Embedded Microcontroller and ADC
9.3 Standby Mode
Standby mode is used to minimize average current consumption while not transmitting
or receiving and still maintaining short start up times to ShockBurst^TM RX and
ShockBurst^TM TX. In this mode the crystal oscillator have to be active. The
configuration word content is maintained during standby.
9.4 Output Power Adjustment
The power amplifier in nRF905 can be programmed to four different output power
settings by the configuration register. By reducing output power, the total TX current is
reduced.
Power setting
RF output power
DC current consumption
00
-10 dBm
11.0 mA
01
-2 dBm
10
6 dBm
11
10 dBm
14.0 mA
20.0 mA
30.0 mA
Conditions: VDD = 3.0V, VSS = 0V, TA = 27ºC, Load impedance = 400 Ω.
Table 17 RF output power setting for the nRF905.
9.5 Modulation
The modulation of nRF905 is Gaussian Frequency Shift Keying (GFSK) with a data-rate
of 100kbps. Deviation is ±50kHz. GFSK modulation results in a more bandwidth
effective transmission-link compared with ordinary FSK modulation.
The data is internally Manchester encoded (TX) and Manchester decoded (RX). That is,
the effective symbol-rate of the link is 50kbps. By using internally Manchester
encoding, no scrambling in the u-controller is needed.
Main office: Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway -Phone [phone] - Fax [phone]
Revision: 1.1
Page 26 of 104
June 2004