NRF402 Datasheet, PDF (5/16 Pages) List of Unclassifed Manufacturers – 433MHz Single Chip RF Transmitter

PRODUCT SPECIFICATION
nRF402 Single Chip RF Transmitter
IMPORTANT TIMING DATA
Timing information
The timing information for the different operations is summarised in Table 5.
(TX is transmit mode, Std.by is standby mode.)
Change of Mode
Std.byè TX
V_DD=0 è TX
Name Max Delay
t_ST
2ms
t_VT
4ms
Condition
Operational
mode
Start-up
Table 5 Switching times for nRF402
Switching between standby and TX-mode.
The maximum time from the PWR_UP input is set to “1”, until the synthesised
frequency is stable is t_ST, see Table 5 and Figure 4.
Std.by to TX
VDD
PWR_UP
DIN
2ms
ms
0
2
4
Figure 4 Timing diagram for nRF402 when going from standby to TX-mode
Powering up to transmit-mode (start-up).
Due to spurious emission when the power supply is switched on, the PWR_UP-input
must be kept low for 2ms after VDD > 2.7 V. Data (DIN) is valid within 2ms after
PWR_UP is high.
VDD=0 to TX
VDD
PWR_UP
DIN
2ms 2ms
ms
0
2
4
Figure 5. Timing diagram for nRF402, when powering up to TX-mode
Nordic VLSI ASA
Revision: 2.1
Vestre Rosten 81, N-7075 Tiller, Norway -
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February 2000