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XR2008IMP8MTR Datasheet(PDF) 10 Page - Exar Corporation |
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XR2008IMP8MTR Datasheet(HTML) 10 Page - Exar Corporation |
10 / 17 page © 2014 Exar Corporation 10 / 17 exar.com/XR1008 Rev 1B XR1008, XR2008 Application Information General Description The XR1008 family are a single supply, general purpose, voltage-feedback ampli ers fabricated on a complementary bipolar process. The XR1008 offers 75MHz unity gain bandwidth, 50V/μs slew rate, and only 505μA supply current. It features a rail-to-rail output stage and is unity gain stable. Figures 1, 2, and 3 illustrate typical circuit congurations for non-inverting, inverting, and unity gain topologies for dual supply applications. They show the recommended bypass capacitor values and overall closed loop gain equations. Figure 4 shows the typical non-inverting gain circuit for single supply applications. The common mode input range extends to 300mV below ground in single supply operation. Exceeding these values will not cause phase reversal. However, if the input voltage exceeds the rails by more than 0.5V, the input ESD devices will begin to conduct. The design uses a Darlington output stage. The output stage is short circuit protected and offers “soft” saturation protection that improves recovery time. + - Rf 0.1μF 6.8μF Output G = 1 + (Rf/Rg) Input +Vs -Vs Rg 0.1μF 6.8μF RL Figure 1: Typical Non-Inverting Gain Circuit + - Rf 0.1μF 6.8μF Output G = - (Rf/Rg) For optimum input offset voltage set R1 = Rf || Rg Input +Vs -Vs 0.1μF 6.8μF RL Rg R1 Figure 2: Typical Inverting Gain Circuit + - 0.1μF 6.8μF Output G = 1 Input +Vs -Vs 0.1μF 6.8μF RL Figure 3: Unity Gain Circuit + - Rf 0.1μF 6.8μF Out In +Vs + Rg Figure 4: Single Supply Non-Inverting Gain Circuit For optimum response at a gain of +2, a feedback resistor of 1kΩ is recommended. Figure 5 illustrates the XR1008 frequency response with both 1kΩ and 2kΩ feedback resistors. Frequency (MHz) 0.1 1 10 100 G = 2 RL = 1kΩ Rf = 1kΩ Rf = 2kΩ Figure 5: Frequency Response vs. Rf |
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Similar Description - XR2008IMP8MTR |
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