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TS3002 bảng dữ liệu(PDF) 11 Page - Silicon Laboratories |
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TS3002 bảng dữ liệu(HTML) 11 Page - Silicon Laboratories |
11 / 13 page TS3002 TS3002 Rev. 1.0 Page 11 341mV can generate an FOUT output signal frequency range of 5.2kHz to 90kHz as well. It is recommended to use resistor values with a 1% tolerance. Using a Potentiometer to Trim the TS3002’s Output Frequency By using a fixed resistor and a potentiometer, the output frequency of the TS3002 can be trimmed as shown in Figure 4. By selecting a fixed resistor R1 with a tolerance of 0.1% and a potentiometer P1 with a 5% tolerance, the output frequency can be trimmed to provide a ±2% trimming range. As shown in Figure 5, R1+P1 and C2 set the output frequency to 25.052kHz when P1 = 0 Ω and with P1 =200kΩ, the resulting output frequency is 24.024kHz. Using Standard Resistors to Increase FOUT Resolution The TS3002 can be configured to provide a 0.1% resolution on the output frequency as shown in Figure 5. To do so, R1 can be set to approximately 10% of the value selected for R2. In addition, R2 and R1 should be chosen with a 0.1% and 1% tolerance, respectively. Since R2 is 90% of the total resistance, it has the largest impact on the resolution of the output frequency. With R1 = 91k Ω and R2 = 910kΩ, the output frequency is 90kHz and with R1 = 400k Ω and R2 = 4M Ω, the output frequency is 23kHz. Figure 5: Setting the TS3002’s Output Frequency to 0.1% Resolution using Standard Resistors. Figure 3: Configuring the TS3002 into a Voltage- Controlled Oscillator. Figure 4: Using a Fixed Resistor and a Potentiometer to Trim the TS3002’s Output Frequency. |
Số phần tương tự - TS3002 |
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Mô tả tương tự - TS3002 |
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