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OPA363AIDR Datasheet(PDF) 8 Page - Texas Instruments |
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OPA363AIDR Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 27 page  OPA363, 2363, 364, 2364, 4364 SBOS259B 8 www.ti.com APPLICATIONS INFORMATION The OPA363 and OPA364 series op amps are rail-to-rail operational amplifiers with excellent CMRR, low noise, low offset, and wide bandwidth on supply voltages as low as ±0.9V. The OPA363 features an additional pin for shutdown/ enable function. These families do not exhibit phase reversal and are unity-gain stable. Specified over the industrial tem- perature range of –40 °C to +125°C, the OPA363 and OPA364 families offer precision performance for a wide range of applications. RAIL-TO-RAIL INPUT The OPA363 and OPA364 feature excellent rail-to-rail opera- tion, with supply voltages as low as ±0.9V. The input com- mon-mode voltage range of the OPA363 and OPA364 family extends 100mV beyond supply rails. The unique input topol- ogy of the OPA363 and OPA364 eliminates the input offset transition region typical of most rail-to-rail complimentary stage operational amplifiers, allowing the OPA363 and OPA364 to provide superior common-mode performance over the entire common-mode input range, as seen in Figure 1. This feature prevents degradation of the differential linearity error and THD when driving A/D converters. A simplified schematic of the OPA363 and OPA364 is shown in Figure 2. OPERATING VOLTAGE The OPA363 and OPA364 series op amp parameters are fully specified from +1.8V to +5.5V. Single 0.1 µF bypass capaci- tors should be placed across supply pins and as close to the part as possible. Supply voltages higher than 5.5V (absolute maximum) may cause permanent damage to the amplifier. Many specifications apply from –40 °C to +125°C. Parameters that vary significantly with operating voltages or temperature are shown in the Typical Characteristics. FIGURE 1. OPA363 and OPA364 have Linear Offset Over Entire Common-Mode Range. FIGURE 2. Simplified Schematic. TYPICAL CHARACTERISTICS (Cont.) At TCASE = +25°C, RL = 10kΩ, and connected to VS/2, VOUT = VS/2, VCM = VS/2, unless otherwise noted. SMALL-SIGNAL STEP RESPONSE (C L = 100pF) 250ns/div LARGE-SIGNAL STEP RESPONSE (C L = 100pF) 1 µs/div Common-Mode Voltage (V) –0.2 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 –2.5 –3.0 –3.5 Competitors OPA363 and OPA364 Regulated Charge Pump V OUT = VCC +1.8V Patent Pending Very Low Ripple Topology I BIAS V CC + 1.8V I BIAS I BIAS I BIAS V S I BIAS V OUT V IN– V IN+ |
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