ATA5811_06 ATMEL [ATMEL Corporation], ATA5811_06 Datasheet - Page 11

• Manufacturer Part Number: ATA5811_06
• Description: UHF ASK/FSK TRANSCEIVER
• Manufacturer: ATMEL [ATMEL Corporation]

Table 5-3.
Table 5-4.
5.3
Figure 5-2.
4689F–RKE–08/06
RF Frequency
RF Frequency
433.92 MHz
433.92 MHz
868.3 MHz
868.3 MHz
315 MHz
315 MHz
-109.0
-108.0
-106.0
-104.0
-103.0
-102.0
-100.0
-107.0
-105.0
-110.0
-101.0
-99.0
-98.0
-96.0
-97.0
-95.0
Sensitivity versus Supply Voltage, Temperature and Frequency Offset
-100
Measured Sensitivity FSK, 16 kHz, Manchester, dBm, BER = 10
Measured Sensitivity 100% ASK, Manchester, dBm, BER = 10
Measured Sensitivity 433.92 MHz/FSK/20 Kbit/s/±16 kHz/Manchester versus Frequency Offset, Tempera-
ture and Supply Voltage
-80
BR_Range_0
BR_Range_0
–117.0 dBm
–116.0 dBm
–112.5 dBm
–110.0 dBm
–109.0 dBm
–106.0 dBm
1.0 Kbit/s
1.0 Kbit/s
-60
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.
-40
Frequency Offset (kHz)
-20
BR_Range_0
BR_Range_0
–117.5 dBm
–116.5 dBm
–113.0 dBm
–110.5 dBm
–109.5 dBm
–106.5 dBm
2.4 Kbit/s
2.4 Kbit/s
0
20
BR_Range_1
BR_Range_1
–114.0 dBm
–111.5 dBm
–109.0 dBm
–108.0 dBm
–105.5 dBm
40
–115 dBm
5.0 Kbit/s
5.0 Kbit/s
amb
= –40°C, +25°C and +105°C and supply voltage
60
-3
80
-3
BR_Range_2
BR_Range_2
–113.5 dBm
–112.5 dBm
–109.5 dBm
–108.0 dBm
–107.0 dBm
–104.0 dBm
10 Kbit/s
10 Kbit/s
ATA5811/ATA5812
100
Figure 5-2
V
V
V
V
V
V
V
V
V
S
S
S
S
S
S
S
S
S
shows the typical
= 2.4V, T
= 3.0V, T
= 3.6V, T
= 3.0V, T
= 2.4V, T
= 3.0V, T
= 3.6V, T
= 2.4V, T
= 3.6V, T
BR_Range_3
–107.0 dBm
–106.0 dBm
–103.5 dBm
20 Kbit/s
amb
amb
amb
amb
amb
amb
amb
amb
amb
= -40˚C
= -40˚C
= -40˚C
= +105˚C
= +25˚C
= +25˚C
= +25˚C
= +105˚C
= +105˚C
11