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SSM2143P Datasheet(PDF) 8 Page - Analog Devices |
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SSM2143P Datasheet(HTML) 8 Page - Analog Devices |
8 / 8 page SSM2143 REV. 0 –8– LINE DRIVER/RECEIVER SYSTEM The SSM2143 and SSM2142 provide a fully integrated line driver/ receiver system. The SSM2142 is a high performance balanced line driver IC that converts an unbalanced input into a balanced output signal. It can drive large capacitive loads on long cables making it ideal for transmitting balanced audio signals. When com- bined with an SSM2143 on the receiving end of the cable, the sys- tem maintains high common-mode rejection and ultralow THD. The SSM2142 is designed with a gain of +2 and the SSM2143 with a gain of 1/2, providing an overall system gain of unity. The following data demonstrates the typical performance of the two parts together, measured on an Audio Precision at the SSM2143’s output. This configuration was tested with 500 feet Figure 30. THD+N vs. Frequency of SSM2142/SSM2143 System (VS = ±18 V, V IN = 5 V rms, with 80 kHz Filter) Figure 31. SSM2142/SSM2143 System Headroom– See Text—(VS = ±18 V, RL = 10 kΩ, 500' Cable) Figure 32. SSM2142/SSM2143 System DIM-100 Dynamic Intermodulation Distortion (VS = ±18 V, RL = 10 kΩ) of cable between the ICs as well as no cable. The combination of the two parts results in excellent THD+N and SNR and a noise floor of typically –105 dB over a 20 Hz to 20 kHz bandwidth. A comment on SSM2142/SSM2143 system headroom is neces- sary. Figure 31 shows a maximum signal handling of approximately ±22 dBu, but it must be kept in mind that this is measured be- tween the SSM2142’s input and SSM2143’s output, which has been attenuated by one half. Normally, the system would be shown as actually used in a piece of equipment, whereby the SSM2143 is at the input and SSM2142 at the output. In this case, the system could handle differential signals in excess of +24 dBu at the input and output, which is consistent with headroom requirements of most professional audio equipment. Figure 33. SSM2142/SSM2143 System Frequency Response (VS = ±18 V, VIN = 0 dBV, 500' Cable) 10 90 100 0% 5V 10 µs Figure 34. SSM2142/SSM2143 System Large Signal Pulse Response (VS = ±18 V, RL = 10 kΩ, No Cable) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 500' CABLE NO CABLE 500' CABLE NO CABLE N-8 0.200 (5.05) 0.125 (3.18) 0.150 (3.81) MIN 0.210 (5.33) MAX 0.430 (10.92) 0.348 (8.84) 0.280 (7.11) 0.240 (6.10) 4 5 8 1 0.070 (1.77) 0.045 (1.15) 0.022 (0.558) 0.014 (0.356) 0.325 (8.25) 0.300 (7.62) 0 - 15 0.100 (2.54) BSC 0.015 (0.381) 0.008 (0.204) SEATING PLANE 0.060 (1.52) 0.015 (0.38) SO-8 SEATING PLANE SEE DETAIL ABOVE 4 5 8 1 0.0688 (1.75) 0.0532 (1.35) 0.0098 (0.25) 0.0075 (0.19) 0.1574 (4.00) 0.1497 (3.80) 0.2440 (6.20) 0.2284 (5.80) 0.1968 (5.00) 0.1890 (4.80) 0.0192 (0.49) 0.0138 (0.35) 0.0500 (1.27) BSC 0.0098 (0.25) 0.0040 (0.10) × 45° 0.0196 (0.50) 0.0099 (0.25) 0.0500 (1.27) 0.0160 (0.41) PIN 1 0 °- 8° |
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