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TLC070AID Datasheet(PDF) 18 Page - Texas Instruments |
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TLC070AID Datasheet(HTML) 18 Page - Texas Instruments |
18 / 48 page TLC070, TLC071, TLC072, TLC073, TLC074, TLC075, TLC07xA FAMILY OF WIDEBANDWIDTH HIGHOUTPUT DRIVE SINGLE SUPPLY OPERATIONAL AMPLIFIERS SLOS219E − JUNE 1999 − REVISED SEPTEMBER 2006 18 WWW.TI.COM POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 APPLICATION INFORMATION driving a capacitive load When the amplifier is configured in this manner, capacitive loading directly on the output will decrease the device’s phase margin leading to high frequency ringing or oscillations. Therefore, for capacitive loads of greater than 10 pF, it is recommended that a resistor be placed in series (RNULL) with the output of the amplifier, as shown in Figure 47. A minimum value of 20 Ω should work well for most applications. CLOAD RF Input Output RG RNULL _ + Figure 47. Driving a Capacitive Load offset voltage The output offset voltage, (VOO) is the sum of the input offset voltage (VIO) and both input bias currents (IIB) times the corresponding gains. The following schematic and formula can be used to calculate the output offset voltage: V OO + V IO 1 ) R F R G " I IB ) R S 1 ) R F R G " I IB– R F + − VI + RG RS RF IIB− VO IIB+ Figure 48. Output Offset Voltage Model |
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