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AD7156BCPZ-REEL7 Arkusz danych(PDF) 7 Page - Analog Devices |
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AD7156BCPZ-REEL7 Arkusz danych(HTML) 7 Page - Analog Devices |
7 / 28 page AD7156 Rev. 0 | Page 7 of 28 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS GND 1 VDD 2 CIN2 3 CIN1 4 EXC2 5 SDA 10 SCL 9 OUT2 8 OUT1 7 EXC1 6 AD7156 TOP VIEW (Not to Scale) NOTES 1. THE EXPOSED PAD MUST BE CONNECTED TO GND OR IT MUST BE ISOLATED (FLOATING). Figure 3. Pin Configuration Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 GND Ground Pin. 2 VDD Power Supply Voltage. This pin should be decoupled to GND using a low impedance capacitor, such as a 0.1 μF X7R multilayer ceramic capacitor. 3 CIN2 CDC Capacitive Input Channel 2. The measured capacitance (sensor) is connected between the EXC2 pin and the CIN2 pin. If not used, this pin can be left open circuit or be connected to GND. When a conversion is performed on Channel 2, the CIN2 pin is internally connected to a high impedance input of the Σ-Δ modulator. When a conversion is performed on the other channel or in idle mode or power-down mode, the CIN2 pin is internally disconnected and left floating by the part. 4 CIN1 CDC Capacitive Input Channel 1. The measured capacitance (sensor) is connected between the EXC1 pin and the CIN1 pin. If not used, this pin can be left open circuit or be connected to GND. When a conversion is performed on Channel 1, the CIN1 pin is internally connected to a high impedance input of the Σ-Δ modulator. When a conversion is performed on the other channel or in idle mode or power-down mode, the CIN1 pin is internally disconnected and left floating by the part. 5 EXC2 CDC Excitation Output Channel 2. The measured capacitance is connected between the EXC2 pin and the CIN2 pin. If not used, this pin should be left as an open circuit. When a conversion is performed on Channel 2, the EXC2 pin is internally connected to the output of the excitation signal driver. When a conversion is per- formed on the other channel or in idle mode or power- down mode, the EXC2 pin is internally connected to GND. 6 EXC1 CDC Excitation Output Channel 1. The measured capacitance is connected between the EXC1 pin and the CIN1 pin. If not used, this pin should be left as an open circuit. When a conversion is performed on Channel 1, the EXC1 pin is internally connected to the output of the excitation signal driver. When a conversion is per- formed on the other channel or in idle mode or power- down mode, the EXC1 pin is internally connected to GND. 7 OUT1 Logic Output Channel 1. A high level on this output indicates proximity detected on CIN1. 8 OUT2 Logic Output Channel 2. A high level on this output indicates proximity detected on CIN2. 9 SCL Serial Interface Clock Input. This pin connects to the master clock line and requires a pull-up resistor if not provided elsewhere in the system. 10 SDA Serial Interface Bidirectional Data. This pin connects to the master data line and requires a pull-up resistor if not provided elsewhere in the system. |
Podobny numer części - AD7156BCPZ-REEL7 |
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Podobny opis - AD7156BCPZ-REEL7 |
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