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TLC271BCP датащи(PDF) 3 Page - Texas Instruments |
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TLC271BCP датащи(HTML) 3 Page - Texas Instruments |
3 / 74 page TLC271, TLC271A, TLC271B LinCMOS ™ PROGRAMMABLE LOW-POWER OPERATIONAL AMPLIFIERS SLOS090C – NOVEMBER 1987 – REVISED AUGUST 1997 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 bias-select feature (continued) Table 1. Effect of Bias Selection on Performance TYPICAL PARAMETER VALUES MODE TYPICAL PARAMETER VALUES TA = 25°C, VDD = 5V HIGH BIAS MEDIUM BIAS LOW BIAS UNIT TA = 25 C, VDD = 5 V RL = 10 kΩ RL = 100 kΩ RL = 1 MΩ PD Power dissipation 3.4 0.5 0.05 mW SR Slew rate 3.6 0.4 0.03 V/ µs Vn Equivalent input noise voltage at f = 1 kHz 25 32 68 nV/ √Hz B1 Unity-gain bandwidth 1.7 0.5 0.09 MHz φm Phase margin 46 ° 40 ° 34 ° AVD Large-signal differential voltage amplification 23 170 480 V/mV bias selection Bias selection is achieved by connecting the bias select pin to one of three voltage levels (see Figure 1). For medium-bias applications, it is recommended that the bias select pin be connected to the midpoint between the supply rails. This procedure is simple in split-supply applications, since this point is ground. In single-supply applications, the medium-bias mode necessitates using a voltage divider as indicated in Figure 1. The use of large-value resistors in the voltage divider reduces the current drain of the divider from the supply line. However, large-value resistors used in conjunction with a large-value capacitor require significant time to charge up to the supply midpoint after the supply is switched on. A voltage other than the midpoint can be used if it is within the voltages specified in Figure 1. bias selection (continued) VDD 1 M Ω 1 M Ω 0.01 µF Low Medium High To the Bias Select Pin BIAS MODE BIAS-SELECT VOLTAGE (single supply) Low Medium High VDD 1 V to VDD – 1 V GND Figure 1. Bias Selection for Single-Supply Applications high-bias mode In the high-bias mode, the TLC271 series features low offset voltage drift, high input impedance, and low noise. Speed in this mode approaches that of BiFET devices but at only a fraction of the power dissipation. Unity-gain bandwidth is typically greater than 1 MHz. medium-bias mode The TLC271 in the medium-bias mode features low offset voltage drift, high input impedance, and low noise. Speed in this mode is similar to general-purpose bipolar devices but power dissipation is only a fraction of that consumed by bipolar devices. |
Аналогичный номер детали - TLC271BCP |
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Аналогичное описание - TLC271BCP |
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