Datenblatt-Suchmaschine für elektronische Bauteile |
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ISL28233FUZ Datenblatt(PDF) 11 Page - Intersil Corporation |
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ISL28233FUZ Datenblatt(HTML) 11 Page - Intersil Corporation |
11 / 20 page 11 FN6560.1 May 29, 2009 voltage supplies are not practical using typical low offset precision op amps. For example, the typical ±100µV VOS and offset drift 0.5µV/°C of a low offset op amp would produce a DC error of >1V with an additional 5mV°C of temperature dependent error making it difficult to resolve DC input voltage changes in the micro-volt range. The ±8µV max VOS and 0.075µV/°C of the ISL28133 produces a temperature stable maximum DC output error of only ±80mV with a maximum temperature drift of 0.75µV/°C. The additional benefit of a very low 1/f noise corner frequency and some feedback filtering enables DC voltages and voltage fluctuations well below 100nV to be easily detected with a simple single stage amplifier. ISL28133 SPICE Model Figure 38 shows the SPICE model schematic and Figure 39 shows the net list for the ISL28133 SPICE model. The model is a simplified version of the actual device and simulates important parameters such as noise, Slew Rate, Gain and Phase. The model uses typical parameters from the ISL28133. The poles and zeros in the model were determined from the actual open and closed-loop gain and phase response. This enables the model to present an accurate AC representation of the actual device. The model is configured for ambient temperature of +25°C. Figures 40 through 47 show the characterization vs simulation results for the Noise Density, Frequency Response vs Close Loop Gain, Gain vs Frequency vs CL and Large Signal Step Response (4V). FIGURE 37. HIGH GAIN, PRECISION DC COUPLED AMPLIFIER - + 100 Ω RL VIN VOUT 1M Ω 1M Ω, 100 Ω ISL28133 -2.5V +2.5V ACL = 10kV/V CF 0.018µF ISL28133, ISL28233, ISL28433 |
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Ähnliche Beschreibung - ISL28233FUZ |
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