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AT86RF212 数据表(PDF) 10 Page - ATMEL Corporation |
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AT86RF212 数据表(HTML) 10 Page - ATMEL Corporation |
10 / 172 page 10 3 Application Schematic 3.1 Basic Application Schematic A basic application schematic of the AT86RF212 with a single-ended RF connector is shown in Figure 3-1. The 50 Ω single-ended RF input is transformed to the 100 Ω differential RF port impedance using balun B1. The capacitors C1 and C2 provide AC coupling of the RF input to the RF port. Regulatory rules like FCC 47 CFR section 15.247 [4], ETSI EN 300 220-1 [5], and ERC/REC 70-03 [6] may require an external filter F1, depending on used transmit power levels. Figure 3-1. Basic Application Schematic 8 7 6 5 4 3 2 1 9 10 11 12 13 14 15 16 25 26 27 28 29 30 31 32 AT86RF212 DIG3 DIG4 AVSS RFP RFN AVSS DVSS 17 18 19 20 21 22 23 24 DVSS CLKM IRQ MISO DVSS MOSI SCLK CB3 CB4 XTAL CX1 CX2 CB1 CB2 RF VDD /RST /SEL C1 C2 B1 F1 C3 R1 The power supply bypass capacitors (CB2, CB4) are connected to the external analog supply pin (EVDD, pin 28) and external digital supply pin (DEVDD, pin 15). Capacitors CB1 and CB3 are bypass capacitors for the integrated analog and digital voltage regulators to ensure stable operation. All bypass capacitors should be placed as close AT86RF212 8168C-MCU Wireless-02/10 |
类似零件编号 - AT86RF212 |
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类似说明 - AT86RF212 |
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