ATA5428-PLQW80 Atmel, ATA5428-PLQW80 Datasheet - Page 16
![RF Transceiver ASK/FSK Transceiver 434 and 868MHz](/photos/30/99/309912/qfn-48_sml.jpg)
ATA5428-PLQW80
Manufacturer Part Number
ATA5428-PLQW80
Description
RF Transceiver ASK/FSK Transceiver 434 and 868MHz
Manufacturer
Atmel
Datasheet
1.ATAB5428-8-WB.pdf
(100 pages)
Specifications of ATA5428-PLQW80
Wireless Frequency
226 KHz, 237 KHz
Interface Type
4-Wire SPI
Noise Figure
7 dB
Output Power
10 dBm
Operating Supply Voltage
2.4 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
QFN-48
Maximum Data Rate
20 Kbps
Minimum Operating Temperature
- 40 C
Modulation
ASK, FSK
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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16
ATA5423/ATA5425/ATA5428/ATA5429
Table 3-6.
The ATA5423/ATA5425/ATA5428/ATA5429 can also receive FSK and ASK modulated signals if
they are much higher than the I1dBCP. It can typically receive useful signals at 10 dBm. This is
often referred to as the nonlinear dynamic range which is the maximum to minimum receiving
signal and is 116 dB for 20 Kbit/s Manchester. This value is useful if two transceivers have to
communicate and are very close to each other.
Figure 3-5.
This high blocking performance even makes it possible for some applications using quarter
wave whip antennas to use a simple LC band-pass filter instead of a SAW filter in the receiver.
W h e n d e s i g n i n g s u c h a n L C f i l t e r t a k e i n t o a c c o u n t t h a t t h e 3 d B b l o c k i n g a t
433.92 MHz/2 = 216.96 MHz is 43 dBC and at 433.92 MHz/3 = 144.64 MHz is 48 dBC and at
2
cially that at 3
second LO harmonic receiving frequency with only 12 dBC blocking.
(433.92 MHz + 226 kHz) + –226 kHz = 868.066 MHz/868.518 MHz is 56 dBC. And espe-
Frequency Offset
+0.75 MHz
–
+1.5 MHz
–
+10 MHz
–
0.75 MHz
1.5 MHz
10 MHz
Blocking 6 dB Above Sensitivity Level with BER < 10
Close In 6 dB Blocking Characteristic and Image Response at 433.92 MHz
(433.92 MHz + 226 kHz) + 226 kHz = 1302.664 MHz the receiver has its
-10
70
60
50
40
30
20
10
0
-1.0
-0.8
Distance of Interfering to Receiving Signal (MHz)
Distance of Interfering to Receiving Signal (MHz)
-0.6
-0.4
Blocker Level
–
–
–
–
–
–
-0.2
45 dBm
45 dBm
38 dBm
38 dBm
30 dBm
30 dBm
0
0.2
0.4
0.6
–3
0.8
1.0
55 dBC/61 dBS
55 dBC/61 dBS
62 dBC/68 dBS
62 dBC/68 dBS
70 dBC/76 dBS
70 dBC/76 dBS
Blocking
4841D–WIRE–10/07
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