ATA5423_06 ATMEL [ATMEL Corporation], ATA5423_06 Datasheet - Page 12

• Manufacturer Part Number: ATA5423_06
• Description: UHF ASK/FSK Transceiver
• Manufacturer: ATMEL [ATMEL Corporation]

3.3
12
Sensitivity versus Supply Voltage, Temperature and Frequency Offset
ATA5423/25/28/29
Table 3-2.
Table 3-3.
Table 3-4.
To calculate the behavior of a transmission system it is important to know the reduction of the
sensitivity due to several influences. The most important are frequency offset due to crystal
oscillator (XTO) and crystal frequency (XTAL) errors, temperature and supply voltage depen-
dency of the noise figure and IF filter bandwidth of the receiver.
sensitivity at 433.92 MHz/FSK/20 Kbit/s/±16 kHz/Manchester versus the frequency offset
between transmitter and receiver with T
VS1 = VS2 = 2.4V, 3.0V and 3.6V.
433.92 MHz
Frequency
RF Frequency
868.3 MHz
315 MHz
345 MHz
915 MHz
433.92 MHz
868.3 MHz
315 MHz
345 MHz
915 MHz
RF
f
433.92
RF
868.3
315
345
915
/MHz
Input Matching to 50Ω
Measured Sensitivity FSK, ±16 kHz, Manchester, dBm, BER = 10
Measured Sensitivity 100% ASK, Manchester, dBm, BER = 10
BR_Range_0
–
–109.0 dBm
–109.5 dBm
–106.0 dBm
–105.5 dBm
1.0 Kbit/s
110.0 dBm
BR_Range_0
–
–
–
–
–
1.0 Kbit/s
117.0 dBm
117.0 dBm
116.0 dBm
112.5 dBm
112.5 dBm
BR_Range_0
–
–110.5 dBm
–109.5 dBm
–106.5 dBm
–106.0 dBm
C
2.4 Kbit/s
110.5 dBm
2.4
1.8
1.8
1.2
1.3
1
/pF
BR_Range_0
–
–
–
–
–
amb
2.4 Kbit/s
117.5 dBm
117.5 dBm
116.5 dBm
113.0 dBm
113.0 dBm
= –40°C, +25°C and +105°C and supply voltage
BR_Range_1
–
–109.0 dBm
–108.0 dBm
–105.5 dBm
–105.0 dBm
5.0 Kbit/s
109.0 dBm
L
1
5.6
6.8
27
47
43
/nH
BR_Range_1
–
–
–
–
–
5.0 Kbit/s
115.0 dBm
115.0 dBm
114.0 dBm
111.5 dBm
111.0 dBm
BR_Range_2
–
–107.5 dBm
–107.0 dBm
–104.0 dBm
–103.5 dBm
10 Kbit/s
108.0 dBm
Figure 3-2
–3
shows the typical
BR_Range_2
–3
–
–
–
–
–
BR_Range_3
4841C–WIRE–05/06
–
–107.0 dBm
–106.0 dBm
–103.5 dBm
–103.0 dBm
113.5 dBm
113.0 dBm
112.5 dBm
109.5 dBm
109.0 dBm
10 Kbit/s
Q
66
67
70
52
107.0 dBm
50
20 Kbit/s
L1