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CS8191XDWFR20 数据表(PDF) 7 Page - Cherry Semiconductor Corporation |
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CS8191XDWFR20 数据表(HTML) 7 Page - Cherry Semiconductor Corporation |
7 / 8 page 7 Speedometer/Odometer or Tachometer Application In some cases a designer may wish to use the CS8191 only as a driver for an air-core meter having performed the F/V conversion elsewhere in the circuit. Figure 8 shows how to drive the CS8191 with a DC voltage ranging from 2V to 6V. This is accomplished by forcing a voltage on the F/VOUT lead. The alternative scheme shown in figure 9 uses an external op amp as a buffer and operates over an input voltage range of 0V to 4V. Figure 8. Driving the CS8191 from an external DC voltage. An alternative solution is to use the CS4101 which has a separate function generator input lead and can be driven directly from a DC source. Figure 8 and 9 are not tempera- ture compensated. Figure 9. Driving the CS8191 from an external DC voltage using an Op Amp Buffer. VIN 0V to 4V DC F/VOUT CP- CS8191 BIAS 100k W 100k W + - + - 10k W 100k W 100k W F/VOUT CP- CS8191 BIAS 10k W 100k W VREG N/C VIN 2V to 6V DC Figure 6 R1 - 3.9, 500mW R2 - 10k½ R3 - 3k½ R4 - 1k½ RT - Trim Resistor +/- 20 PPM/DEG. C C1 - 0.1µF C2 - With CS-8441 application, 10µF C3 - 0.1µF C4 - 0.47µF CT - 0.0033µF, +/- 30 PPM/¡C D1 - 1A, 600 PIV D2 - 50V, 500mW Zener Note 1: The product of CT and RT have a direct effect on gain and therefore directly effect temperature compensation. Note 2: C4 Range; 20pF to .2µF. Note 3: R4 Range; 100k½ to 500k½. Figure 7 Note 4: The IC must be protected from transients above 60V and reverse battery conditions. Note 5: Additional filtering on the FREQIN lead may be required. 1 CS8441 C2 Air Core Stepper Motor 200 W Odometer 1 CP+ 2 3 4 5 6 7 8 SQOUT FREQIN Gnd Gnd COS+ COS- 16 15 14 13 12 11 10 9 CP- F/VOUT VREG Gnd Gnd SINE+ SINE- BIAS D1 + C4 RT COSINE SINE Battery VCC CP+ R1 D2 C1 R4 Typical Speedometer Input Ground CT R3 R2 C3 Air Core Gauge Speedometer 1 CP+ 2 3 4 5 6 7 8 SQOUT FREQIN Gnd Gnd COS+ COS- 16 15 14 13 12 11 10 9 CP- F/VOUT VREG Gnd Gnd SINE+ SINE- BIAS D1 + C4 RT COSINE SINE Air Core Gauge Speedometer Battery VCC CP+ R1 D2 C1 R4 Typical Speedometer Input Ground CT R3 R2 C3 |
类似零件编号 - CS8191XDWFR20 |
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类似说明 - CS8191XDWFR20 |
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