Accel Instruments TS200 User Manual
Also see for TS200: Quick start guide
                     | |
Contents
| 
15Line Transient MeasurementLDO/SMPSTS200ModInput OutputDUTLoadFunctionGeneratorOr AWGOscilloscopeCH1 CH2Figure 8. Line transient measurement setup.Most LDOs and switch-mode power supply (MSPS) specified their linetransient specifications. Line transient response specifies its output voltagechange after an input voltage step change. For example, an LDO specified itsoutput voltage deviates less than 5mV for a 200mV input voltage step from3.6V to 3.8V in 10 microseconds. This is also called line step response.Figure 8 shows how to measure line transient response. A function generatorgenerates a square pulse with a specific rise and fall time (i.e. 10us). Thefunction generator is connected to the Mod input of TS200 and the TS200output is connected to the device under test. Typically the TS200 is set to DC-couple. Set the function generator’s pulse high and low voltages generate thetransient step. For example, to generate a 3.6V to 3.8V voltage step, set thefunction generator output voltage low to 3.6V and output high voltage to 3.8V.If B-version is used, set the output voltage low to 0.36V and output highvoltage to 0.38V, since the TS200 gain is 20dB.It is recommended to keep the DUT input capacitor to minimum (0.1uF or less)to allow faster rise and fall time. Use as short cables as possible (Less than 12inches) connecting TS200 output and the DUT. Twist the cables to together tominimize inductance.To measure the line transient step, connect an oscilloscope probe (CH1) to theDUT input and another probe (CH2) to the DUT output as shown in Figure 8.The transient response is measured at CH2. Figure 9 shows an example of linetransient measurement. |
This manual is suitable for:
manualsdatabase
Your AI-powered manual search engine