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MCRF451 датащи(PDF) 9 Page - Microchip Technology |
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MCRF451 датащи(HTML) 9 Page - Microchip Technology |
9 / 50 page 2003 Microchip Technology Inc. DS40232H-page 9 MCRF450/451/452/455 TABLE 2-7: PAD FUNCTION TABLE FIGURE 2-2: EXTERNAL CIRCUIT CONFIGURATION FOR MCRF450 Name Function Ant. Pad A Connected to antenna coil L1. Ant. Pad B Connected to antenna coils L1 and L2 for MCRF450/451/455, NC for MCRF452. V SS Connected to antenna coil L2. Device ground during Test mode. (V SS = substrate) F CLK For device test only. Leave floating or connect to V SS in applications. CLK V DD For device test only. Leave floating in applications. Note: NC = Not Connected. Ant. A Ant. B L1 V SS L2 C MCRF450 Note: Substrate = V SS L1 > L2 (a) Two inductors and one capacitor ftuned 1 2π LTC ---------------------- = fdetuned 1 2π L1C ---------------------- = LT L1 L2 2LM ++ = Where: LM = mutual inductance of L1 and L2 LT = Total antenna inductance between Ant. A and VSS LM KL1L2 = K = coupling coefficient of two inductors (0 ≤ K ≤ 1) Ant. A Ant. B L V SS C1 MCRF450 Note: Substrate = V SS C1 ≥ C2 (b) One inductor and two capacitors ftuned 1 2π LTCT -------------------------- = fdetuned 1 2π LC1 ---------------------- = CT C1C2 C1 C2 + -------------------- = C2 Note: Input parasitic capacitance between Antenna A and V SS pads = 3.5 pF. See application notes, AN710 and AN830 for antenna circuit design. |
Аналогичный номер детали - MCRF451 |
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Аналогичное описание - MCRF451 |
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