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ATA5746-PXQW Datasheet(PDF) 11 Page - ATMEL Corporation |
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ATA5746-PXQW Datasheet(HTML) 11 Page - ATMEL Corporation |
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11 / 44 page  11 4596B–RKE–06/07 ATA5745/ATA5746 [Preliminary] 2.5 RX Supply Current Versus Temperature and Supply Voltage Table 2-7 shows the typical supply current of the receiver in Active mode versus supply voltage and temperature with VS = VS3V_AVCC = VS5V. 2.6 Blocking, Selectivity As can be seen in Figure 2-6 on page 11, and Figure 2-7 and Figure 2-8 on page 12, the receiver can receive signals 3 dB higher than the sensitivity level in the presence of large block- ers of –34.5 dBm or –28 dBm with small frequency offsets of ±3 MHz or ±20 MHz. Figure 2-6, and Figure 2-7 on page 12 show the narrow-band blocking, and Figure 2-8 on page 12 shows the wide-band blocking characteristic. The measurements were done with a useful signal of 315 MHz, FSK, 10 Kbits/s, ±38 kHz, Manchester, BR_Range2 with a level of –105 dBm + 3 dB = –102 dBm, which is 3 dB above the sensitivity level. The figures show how much larger than –102 dBm a continuous wave signal can be, until the BER is higher than 10 –3. The measurements were done at the 50 Ω input shown in Figure 2-1 on page 6. At 3 MHz, for ex am ple, th e b l o cke r can be 6 7 .5 d B C h i gh er th an –10 2 d Bm , or –102 dBm + 67.5 dBC = –34.5 dBm. Figure 2-6. Close-in 3-dB Blocking Characteristic and Image Response at 315 MHz Table 2-6. Measured Current in Active Mode ASK VS = VS3V_AVCC = VS5V 2.7V 3.0V 3.3V T amb = –40°C 5.4 mA 5.5 mA 5.6 mA T amb = 25°C 6.4 mA 6.5 mA 6.6 mA T amb = 105°C 7.4 mA 7.5 mA 7.6 mA Table 2-7. Measured Current in Active Mode FSK VS = VS3V_AVCC = VS5V 2.7V 3.0V 3.3V T amb = –40°C 5.6 mA 5.7 mA 5.8 mA T amb = 25°C 6.6 mA 6.7 mA 6.8 mA T amb = 105°C 7.6 mA 7.7 mA 7.8 mA -10.0 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 Distance from Interfering to Receiving Signal (MHz) |
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