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OPA340-EP Datasheet(PDF) 9 Page - Texas Instruments |
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OPA340-EP Datasheet(HTML) 9 Page - Texas Instruments |
9 / 19 page V =+5,G=+1,R =10kW S L 5 5 0 V IN V OUT OPA340-EP www.ti.com SBOS433A – AUGUST 2008 – REVISED APRIL 2011 APPLICATION INFORMATION 125 °C. Most behavior remains nearly unchanged The OPA340 is fabricated on a state-of-the-art throughout the full operating voltage range. 0.6-micron CMOS process. It is unity-gain stable and Parameters that vary significantly with operating suitable for a wide range of general-purpose voltages or temperature are shown in Typical applications. Rail-to-rail input/output makes it ideal for Characteristics. driving sampling A/D converters. In addition, excellent ac performance makes it well-suited for audio Rail-to-Rail Input applications. The class AB output stage is capable of driving 600- Ω loads connected to any point between The input common-mode voltage range of the V+ and ground. OPA340 extends 500 mV beyond the supply rails. This is achieved with a complementary input Rail-to-rail input and output swing significantly stage —an N-channel input differential pair in parallel increases dynamic range, especially in low-supply with a P-channel differential pair (as shown in applications. Figure 23 shows the input and output Figure 24). The N-channel pair is active for input waveforms for the OPA340 in unity-gain voltages close to the positive rail, typically configuration. Operation is from a single 5-V supply (V+) – 1.3 V to 500 mV above the positive supply, with a 10-k Ω load connected to VS/2. The input is a while the P-channel pair is on for inputs from 500 mV 5-VPP sinusoid. Output voltage is approximately below the negative supply to approximately 4.98 VPP. (V+) – 1.3 V. There is a small transition region, typically (V+) – 1.5 V to (V+) – 1.1 V, in which both Power-supply pins should be bypassed with 0.01- μF pairs are on. This 400-mV transition region can vary ceramic capacitors. ±300 mV with process variation. Thus, the transition region (both stages on) can range from (V+) – 1.8 V to (V+) – 1.4 V on the low end, up to (V+) – 1.2 V to (V+) – 0.8 V on the high end. The OPA340 is laser-trimmed to reduce the offset voltage difference between the N-channel and P-channel input stages, resulting in improved common-mode rejection and a smooth transition between the N-channel pair and the P-channel pair. However, within the 400-mV transition region PSRR, CMRR, offset voltage, offset drift, and THD may be degraded compared to operation outside this region. A double-folded cascode adds the signal from the two input pairs and presents a differential signal to the class AB output stage. Normally, input bias current is Figure 23. Rail-to-Rail Input and Output approximately 200 fA; however, input voltages exceeding the power supplies by more than 500 mV Operating Voltage can cause excessive current to flow in or out of the input pins. Momentary voltages greater than 500 mV The OPA340 is fully specified from 2.7 V to 5 V. beyond the power supply can be tolerated if the Parameters are ensured over the specified supply current on the input pins is limited to 10 mA. This is range —a unique feature of the OPA340 series. In easily accomplished with an input resistor, as shown addition, many specifications apply from –55°C to in Figure 25. Many input signals are inherently current-limited to less than 10 mA; therefore, a limiting resistor is not required. Copyright © 2008–2011, Texas Instruments Incorporated 9 |
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Similar Description - OPA340-EP_15 |
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