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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ML6424 датащи(PDF) 3 Page - Micro Linear Corporation |
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ML6424 датащи(HTML) 3 Page - Micro Linear Corporation |
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3 / 12 page  ML6424/ML6425 3 Pin # Name Description 1,3, VCC Positive supply voltages 5,11 (4.75V to 5.25V). 2,10, GND Ground voltages. 14 4 PULSE I/O U/V clamp switch control input/output pin. When MODE is low, U/V clamp control pulse can be applied to this input pin. When MODE is high, the internal circuit generates a U/V clamp control signal to produce an output pulse at this pin. When MODE is floating, do not apply any voltage to this pin since it is internally tied low in this case. (See table below) 6,7 VIN P, Input to the filter. The input voltage for VIN M the filter is applied to VIN P pin with respect to VIN M pin which is grounded. (With no connection to MODE pin, input signal range should be from VIN = 0.5V to 1.5V when RANGE = Low, VIN = 0V to 1V when RANGE = High). There is a 100 µA internal current source connected to each of these inputs. 8 RANGE Input signal range control when MODE is floating. When RANGE is low, the input signal range is 0.5V to 1.5V, when RANGE is tied high the input signal range is 0V to 1V. 9REXT Precision resistor to ground that defines the cutoff frequency of the filter. (Typical value = 10k Ω) 10% change in REXT produces a 10% change in fC (Fig. 28). PIN DESCRIPTION Pin # Name Description 12 MODE Input coupling mode control pin. When MODE is low, U/V signal can be applied through an external ac coupling capacitor to VIN P. When MODE is high, Y signal can be applied through an external AC coupling capacitor to VIN P. In this case, an internal circuitry clamps the sinc tip of the video input signal. When MODE is set to mid supply or left floating, input signal can be directly applied to the input without an AC coupling capacitor. 13 GAIN Three state gain control pin. GAIN tied low sets the input amplifier gain to 3/4 (0.75) and the output amplifier gain to 4/3 (1.333). When GAIN is tied high, the input amplifier gain is 3/2 (1.5) and the output amplifier gain is 4/3. When GAIN is set to mid supply or left to float, the input amplifier gain is 3/4 and the output gain is 8/3 (2.666). (See table below) 15,16 VOUT P, The output from the filter is derived VOUT M from the VOUT P pin with respect to the VOUT M pin which is grounded typically. It can drive 1VPP/75Ω (0.5V to 1.5V) or 2VPP/150Ω (0.5V to 2.5V). If the ouput common-mode level needs to be increased, it can be done by raising the potential of VOUT M. In this case, the output is measured from VOUT P with respect to GND. Gain Table Pulse Mode Table MODE INPUT COUPLING PULSE Low AC for U/V Input Float DC Internally biased High AC for Y Output GAIN INPUT INPUT OUTPUT OUTPUT OPTIMIZES SELECT BUFFER BUFFER GAIN GAIN Low 1VPP 0.75 1.333 1VPP — Float 1VPP 0.75 2.666 2VPP Differential Phase & Gain High 1VPP 1.50 1.333 2VPP Noise |
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