AT86RF211DB-868LT Atmel, AT86RF211DB-868LT Datasheet - Page 18

• Manufacturer Part Number: AT86RF211DB-868LT
• Description: BOARD DAUGHTER AT86RF211/868MHZ
• Manufacturer: Atmel

Specifications of AT86RF211DB-868LT

• Module/board Type: Daughter Board
• For Use With/related Products: AT86RF211 @ 866MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: AT86RF211-DB868107; AT86RF211DB868107; AT86RF211DB868107; AT86RF211DB868LT

18
AT86RF211 (TRX01)
•
Qc = 8 x 0.8 + 13 x 48 + 4200 x 0.003 = 643 mA.ms
Number of 4.2s cycles = 4.7 10
12 months ± 1 month.
The conclusion is that the use of the transceiver with the feature of a stand-alone wake-
up mode allows to save energy and improve batteries' life.
–
–
–
Consumption is determined by sleep mode, oscillator settling & WL1.
During each 1610 ms cycle here are:
–
–
–
Qc = 8 x 0.8 + 3 x 29 + 4170 x 0.003 = 105.9 mA.ms
Number of 4181 ms cycles = 4.7 10
sponding to 6 years ± 20% (± 1.2 year).
With a single transmitter, the chip must send the data each time (so every 4.2 s)
With the same parameters, during each 4.2 s cycle Atmel has:
–
–
–
–
WL1 = 2 ms, WL2 = 16 ms, (1 ms + WPER + 8 ms +WL1) + 20% = 5 s, so
the worst case to make sure that the device is ready to answer before 5s is:
(1 ms + WPER + 8 ms + WL1) = 4166 ms => WPER = 4170 ms
('010101010').
as the WPER is short, there is no need to care about the discharge of the
SKFILT capacitor: the level remains constant.
since "request & answer" occurs typically once an hour, the corresponding
power consumption can be neglected.
8 ms: oscillator settling time, the consumption is 0.8 mA.
0.5 ms for the PLL + WL1 = 2.5 ms in reception mode (rounded to 3 ms).
3 µA during 4170 ms: sleep mode.
8 ms: oscillator settling time, the consumption is 0.8 mA.
0.5 ms for the PLL transmission mode.
48 mA during 13 ms: transmission of the information.
3 µA during 4.2 s: sleep mode.
9
/643 = 7 309 489 cycles of 4.2s, corresponds to
9
/105.9 = 44 381 490 cycles of 4181 ms corre-
2186A–WIRE–08/02