at86rf211 ATMEL Corporation, at86rf211 Datasheet - Page 21
at86rf211
Manufacturer Part Number
at86rf211
Description
Fsk Transceiver For Ism Radio Applications
Manufacturer
ATMEL Corporation
Datasheet
1.AT86RF211.pdf
(48 pages)
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Part Number
Manufacturer
Quantity
Price
Part Number:
at86rf211S
Manufacturer:
ATMEL/爱特梅尔
Quantity:
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Company:
Part Number:
at86rf211SW
Manufacturer:
LSI
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Figure 27. Typical Output Power of the PA for T = 25°C and V
Hardware Control
1942C–WIRE–06/02
14
12
10
-2
8
6
4
2
0
26
An automatic level control loop (ALC) is integrated, in order to minimize the sensitivity of
the PA to the temperature, process and power supply variations. For instance, at +85°C,
the output power is about 2 dB less than at 25°C. At -40°C, the output power is higher
than at 25°C. The ALC is controlled by a current which is generated in the following way:
Figure 26. ALC of the Power Amplifier
The max output power is determined by R
obtained with R
18 k
Decreasing this value to 10 k
+10 dBm at 915 MHz (typical values for conducted output power).
31
is the nominal value for a +10 dBm output in the 868 MHz frequency band.
36
POWER
1.25 V
Output Power
(v)
= 10 k .
41
Isupply (mA)
U
CC
= 3V
will lead to +14 dBm at 433 MHz, +12 dBm at 868 MHz,
I
R
46
POWER
18 k
i
ref
=
R
POWER
V
51
POWER
power control
433MHz
digital
3 bits
and the maximum output power is
868MHz
56
DAC
915MHz
61
AT86RF211
I
To ALC
OUT
21