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MAX4138 Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX4138 Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 4 page MAX4136, MAX4137, MAX4138 Configuration The MAX4135 EV kit can easily be configured to evalu- ate the MAX4136, MAX4137, or MAX4138. The primary differences between the four parts are the number of output channels (four or six), and either fixed (2V/V) or adjustable gain ( ≥2V/V). Refer to Table 1 and to the MAX4135/MAX4136 and MAX4137/MAX4138 data sheets for further information. Evaluating the MAX4136 To evaluate the MAX4136, simply order a free sample (MAX4136EWG), replace the MAX4135 with the MAX4136 on the PC board, and select and install the gain-setting resistors for the desired gain. Evaluating the MAX4137 To evaluate the MAX4137, order a free sample (MAX4137EWG) and replace the MAX4135 with the MAX4137 on the PC board. Keep the 0 Ω resistor in RG and leave RF open. Note that the four output channels correspond to those labeled OUT2–OUT5, and are selected via SEL2–SEL5 on SW1 (see Table 2). Evaluating the MAX4138 To evaluate the MAX4138, simply order a free sample (MAX4138EWG), replace the MAX4135 with the MAX4138 on the PC board, and select and install the gain-setting resistors for the desired gain. Note that the four output channels correspond to those labeled OUT2–OUT5, and are selected via SEL2–SEL5 on SW1 (see Table 2). Layout Considerations The MAX4135 EV kit layout has been optimized for high-speed signals and low distortion, with careful attention given to grounding, power-supply bypassing, and signal-path layout. The small, surface-mount, ceramic bypass capacitors (C2, C4, C5, and C6) have been placed as close to the four MAX4135 supply pins as possible. The ground plane has been removed around and under the MAX4135 to reduce stray capac- itance. The removal of ground plane around the input SMA connector reduces distortion. MAX4135 Evaluation Kit 2 _______________________________________________________________________________________ Table 1. Gain Configuration Table 2. Output Channel Selection 6 6 No. OF OUTPUTS User selected Open RF MAX4136 MAX4135 PART ≥ 2 Fixed at 2 GAIN V/V User selected 0 Ω RG ≥ 2 Fixed at 2 User selected 0 Ω 4 4 User selected Open MAX4138 MAX4137 S SE EL L1 1 No. OF OUTPUTS PART S SE EL L2 2 SW1 SWITCH SETTINGS S SE EL L4 4 S SE EL L3 3 S SE EL L6 6 S SE EL L5 5 OUT2 OUT1 OUT4 OUT3 OUT6 6 OUT5 MAX4135 OUT2 OUT1 OUT4 OUT3 OUT6 6 OUT5 OUT1 — OUT3 OUT2 — 4 OUT4 MAX4137 MAX4136 OUT1 — OUT3 OUT2 — 4 OUT4 MAX4138 |
Similar Part No. - MAX4138 |
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Similar Description - MAX4138 |
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