NCV1124 ON Semiconductor, NCV1124 Datasheet - Page 5

• Manufacturer Part Number: NCV1124
• Description: Dual Variable−reluctance Sensor Interface IC
• Manufacturer: ON Semiconductor

thresholds. As the sin wave input threshold is increased, the
low side clamps become active (Figure 4). Increasing the
amplitude further (Figure 5), the high−side clamp becomes
active. These internal clamps allow for voltages up to −250 V
and 250 V on the sensor side of the setup (with R1 = R2 =
22 k) (reference the diagram page 1).
function has on the circuit. The input threshold (negative) is
switched from a threshold of −160 mV to +160 mV when
DIAG goes from a low to a high. There is no hysteresis when
DIAG is high.
Figure 3 shows the part operating near the minimum input
Figure 6 shows the effect using the diagnostic (DIAG)
Figure 3. Minimum Threshold Operation
OUT1, 2.0 V/div
Figure 4. Low−Side Clamp
20 ms/div
20 ms/div
IN1, 200 mV/div
OUT1, 2.0 V/div
IN1, 5.0 V/div
CIRCUIT DESCRIPTION
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NCV1124
5
Figure 5. Low− and High−Side Clamps
OUT1, 2.0 V/div
Figure 6. Diagnostic Operation
20 ms/div
20 ms/div
IN1, 5.0 V/div
DIAG
5.0 V/div
IN1
1.0 V/div
OUT1
5.0 V/div