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CLC5602 Datasheet(PDF) 11 Page - National Semiconductor (TI) |
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CLC5602 Datasheet(HTML) 11 Page - National Semiconductor (TI) |
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11 / 12 page  11 http://www.national.com where Zo(5602)(jω) is the output impedance of the CLC5602 and |Zo(5602)(jω)| << Rm. The load voltage and current will fall in the ranges: The CLC5602’s high output drive current and low distortion make it a good choice for this application. Full Duplex Cable Driver The circuit shown in Figure 16 below, operates as a full duplex cable driver which allows simultaneous transmis- sion and reception of signals on one transmission line. The circuit on either side of the transmission line uses are CLC5602 as a cable driver, and the second CLC5602 as a receiver. VoA is an attenuated version of VinA, while VoB is an attenuated version of VinB. Figure 16: Full Duplex Cable Driver Rm1 is used to match the transmission line. Rf2 and Rg2 set the DC gain of the CLC5602, which is used in a difference mode. Rt2 provides good CMRR and DC offset. The transmitting CLC5602’s are shown in a unity gain configuration because they consume the least power of any gain, for a given load. For proper operation we need Rf2 = Rg2. The receiver output voltages are: where A is the attenuation of the cable, Zo(5602)(jω) is the output impedance of the CLC5602 (see the Closed-Loop Output Resistance plot), and |Zo(5602)(jω)| << Rm1. We selected the component values as follows: s Rf1 = 1.0kΩ, the recommended value for the CLC5602 at unity gain s Rm1 = Zo = 50Ω, the characteristic impedance of the transmission line s Rf2 = Rg2 = 750Ω ≥ Rm1, the recommended value for the CLC5602 at Av = 2 s These values give excellent isolation from the other input: The CLC5602 provides large output current drive, while consuming little supply current, at the nominal bias point. It also produces low distortion with large signal swings and heavy loads. These features make the CLC5602 an excellent choice for driving transmission lines. Rf1 + - Rt1 Z0 Rf2 - + 1/2 CLC5602 VinA Rg2 Rt2 Rm1 VoB Rf1 + - Rt1 Rf2 - + VinB Rg2 Rt2 Rm1 VoA 1/2 CLC5602 1/2 CLC5602 1/2 CLC5602 R(R || R ) – R 2 25 t2 f2 g2 m1 == Ω V V 38dB, f 5.0MHz oA(B) inB(A) ≈− = VV A V 2 1 R R Z(j ) R outA(B) inA(B) inB(A) f2 g2 o(5602) m1 ≈⋅ + ⋅ − + ω Vn V I I n o o ≤⋅ ≤ max max |
Similar Part No. - CLC5602 |
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Similar Description - CLC5602 |
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