ATA5823 ATMEL Corporation, ATA5823 Datasheet - Page 22

• Manufacturer Part Number: ATA5823
• Description: Uhf Ask/fsk Transceiver Ata5823 Ata5824
• Manufacturer: ATMEL Corporation

Table 7-7.
22
Frequency
433.92
433.92
433.92
(MHz)
868.3
868.3
868.3
315
315
315
ATA5823/ATA5824
Measured Output Power and Current Consumption with V
TX Current
(mA)
10.5
16.7
11.2
17.8
11.5
16.3
8.5
8.6
9.3
An internal programmable resistor SETPWR is programmable with the control register 8,
described in
adjust the output power by connection it like in the application
on page
lower than needed for the target output power and reduced with the programmable resistor dur-
ing production test until the target power is as close as possible to the target. For example, if
using 433.92 MHz at 5 dBm, a resistor of 12k instead of 24k is used and values of PWSET
between 25 and 29 can be used to achieve an output power within 5 dBm ±0.5 dB over produc-
tion. In full-duplex mode this internal resistor is used to reduce the output power for full-duplex
operation versus the power in half-duplex operation. Note that this resistor is temperature stable
but has tolerances of ±20% and introduces, therefore, additional output power tolerances, it is
recommended to adjust output power during the production test if using the SETPWR resistor.
Figure 7-12. Power Setting and Output Matching
9. To do that the output power should be adjusted with an external resistor about 50%
Output Power
Table 12-25 on page
(dBm)
10.5
–0.3
0.4
5.7
0.1
6.2
5.4
9.5
11
RF
OUT
C
3
(k )
R1
56
27
27
56
33
15
22
22
22
VPWR_H
43. It can be used in conjunction with an external resistor to
AVCC
C
1
R
L
1
1
VPWR_H
AVCC
AVCC
AVCC
0
0
0
0
0
0
10
S1
8
9
C
2
= V
RF_OUT
R_PWR
PWR_H
ATA5820/ATA5821
S2
R
Lopt
2500
2300
1170
= 3V, T
920
350
890
300
471
245
( )
Figure 5-1 on page 8
amb
(nH)
= 25°C
82
68
56
56
12
15
L
47
33
10
1
Q
28
32
35
40
38
43
58
54
57
L1
0.75
(pF)
1.5
2.2
3.9
1.5
2.7
1.0
1.0
1.5
4829D–RKE–06/06
C
or
1
Figure 6-1
(pF)
3.3
C
0
0
0
0
0
0
0
0
3