Why are you connecting a DAC to the sense resistor in a constant current sink? The voltage across the resistor should not vary very much. It will a teeny bit, but your DAC may not resolve the change. sorry, this was not very clear.the unknown resistor (Rx) its a power resistor (the...
放大器类型: High Output Current Amplifier 高度: 8.51 mm 长度: 10.16 mm 电源类型: Dual 宽度: 4.58 mm 双重电源电压: +/- 12 V, +/- 15 V, +/- 18 V en - 输入电压噪声密度: 36 nV/sqrt Hz In—输入噪声电流密度: 0.003 pA/sqrt Hz 最大双重电源电压: +/- 35 V 最小双重电源电压: +/...
As the DAC and op amps get faster, they as well move closer to the transmitting antenna. It notes, however, that the op amp used for transimpedance amplifier needs to slew fast enough to match the DAC's output, sink or source its full-scale current and drive the load. It states that...
If there is no load connected to the MOSFET drain (i.e. drain supply is OFF), even a small positive voltage on the (+) op-amp input will drive the MOSFET gate to the max supply voltage of the op-amp because the (-) op-amp input will stay at zero volts because there is no cu...
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d admit to it — you found it would light up. Once, anyway. The excess current blows up the LED which is why you need a current-limiting resistor. However, those current limiting resistors are really a poor excuse for a current source or sink. In many applications, you need a real ...
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The offset is added on top of the 2.0 V full-scale, current-share output signal. See Figure 15. ISHARE DRIVE AMPLIFIER This amplifier is a buffer with enough current source capability to drive the current-share circuits of several slave power supplies. It has negligible current sink capability...
Incorporated Amplifiers: Op Amps Interfacing op amps to high-speed DACs, Part 2: Current-sourcing DACs By Jim Karki Member, Technical Staff, High-Performance Analog Introduction Most high-speed DACs are current-steering DACs that are designed with complementary outputs that either source or sink ...
3.3 V AVDD DAC5675A IOUT1 50 Ω 100 Ω IOUT2 50 Ω 1:1 RLOAD 50 Ω 3.3 V AVDD Figure 1. Typical Output Interface for a High-Speed, Current Steering Output DAC This particular DAC wants to sink current from a supply voltage that is equal to the positive supply voltage of the DAC...