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DRV134PAG4 Datasheet(PDF) 8 Page - Burr-Brown (TI) |
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DRV134PAG4 Datasheet(HTML) 8 Page - Burr-Brown (TI) |
8 / 12 page 8 ® DRV134, 135 APPLICATIONS INFORMATION The DRV134 (and DRV135 in SO-8 package) converts a single-ended, ground-referenced input to a floating differ- ential output with +6dB gain (G = 2). Figure 1 shows the basic connections required for operation. Decoupling ca- pacitors placed close to the device pins are strongly recom- mended in applications with noisy or high impedance power supplies. The DRV134 consists of an input inverter driving a cross- coupled differential output stage with 50 Ω series output resistors. Characterized by low differential-mode output impedance (50 Ω) and high common-mode output imped- ance (1.6k Ω), the DRV134 is ideal for audio applications. Normally, +VO is connected to +Sense, –VO is connected to –Sense, and the outputs are taken from these junctions as shown in Figure 1. For applications with large dc cable offset errors, a 10 µF electrolytic nonpolarized blocking capacitor at each sense pin is recommended as shown in Figure 2. FIGURE 1. Basic Connections. FIGURE 2. Complete Audio Driver/Receiver Circuit. V IN Gnd +V O A2 10k Ω 50 Ω 50 Ω All resistors 30k Ω unless otherwise indicated. SOL-16 pin numbers in parentheses. +Sense –Sense –V O G = +6dB V+ (12) 6 A3 A1 10k Ω 1 µF V– DRV134 DRV135 5 (11) 1 µF 4 (6) 3 (5) 8 (14) 7 (13) 2 (4) 1 (3) V IN Gnd A2 10k Ω 50 Ω 50 Ω All resistors 30k Ω unless otherwise indicated. Pin numbers shown for DIP and SO-8 versions. NOTE: (1) Optional 10 µF electrolytic (nonpolarized) capacitors reduce common-mode offset errors. INA134 (G = 1): V O = 2VIN INA137 (G = 1/2): V O = VIN A3 A1 10k Ω DRV134 DRV135 4 3 8 +V O –V O +V O –V O 7 2 1 INA134, INA137 RECEIVER DRIVER BALANCED CABLE PAIR V O 5 6 1 2 3 10 µF(1) 10 µF(1) |
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