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OPA348AIDBVRG4 Datasheet(PDF) 8 Page - Texas Instruments |
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OPA348AIDBVRG4 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 32 page -0.5 Common-Mode Voltage (V) OFFSET VOLTAGE vs FULL COMMON-MODE VOLTAGE RANGE 0 V- 0.5 1.5 1 2.5 2 3.5 3 4.5 5 4 5.5 2 1.5 1 0.5 0 -0.5 -1 -1.5 -2 V+ 5V 0V G = +1V/V, V = +5V S 20 s/div m Output (Inverted on Scope) OPA348 OPA2348 OPA4348 SBOS213G – NOVEMBER 2001 – REVISED MARCH 2013 www.ti.com APPLICATION INFORMATION COMMON-MODE VOLTAGE RANGE The OPA348 series op amps are unity-gain stable and suitable for a wide range of general-purpose The input common-mode voltage range of the applications. OPA348 series extends 200mV beyond the supply rails. This is achieved with a complementary input The OPA348 series features wide bandwidth and stage—an N-channel input differential pair in parallel unity-gain stability with rail-to-rail input and output for with a P-channel differential pair. The N-channel pair increased dynamic range. Figure 19 shows the input is active for input voltages close to the positive rail, and output waveforms for the OPA348 in unity-gain typically (V+) – 1.2V to 300mV above the positive configuration. Operation is from a single +5V supply supply, while the P-channel pair is on for inputs from with a 100k Ω load connected to VS/2. The input is a 300mV below the negative supply to approximately 5VPP sinusoid. Output voltage is approximately (V+) – 1.4V. There is a small transition region, 4.98VPP. typically (V+) – 1.4V to (V+) – 1.2V, in which both pairs are on. This 200mV transition region, shown in Power-supply pins should be bypassed with 0.01 μF Figure 20, can vary ±300mV with process variation. ceramic capacitors. Thus, the transition region (both stages on) can range from (V+) – 1.7V to (V+) – 1.5V on the low end, up to (V+) – 1.1V to (V+) – 0.9V on the high end. Within the 200mV transition region PSRR, CMRR, offset voltage, offset drift, and THD may be degraded compared to operation outside this region. Figure 19. The OPA348 Features Rail-to-Rail Input/Output OPERATING VOLTAGE The OPA348 series op amps are fully specified and tested from +2.5V to +5.5V. However, supply voltage may range from +2.1V to +5.5V. Parameters are tested over the specified supply range—a unique Figure 20. Behavior of Typical Transition Region feature of the OPA348 series. In addition, all at Room Temperature temperature specifications apply from –40°C to +125°C. Most behavior remains virtually unchanged throughout the full operating voltage range. Parameters that vary significantly with operating voltages or temperature are shown in the Typical Characteristics. 8 Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: OPA348 OPA2348 OPA4348 |
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