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AD5941 Datasheet(PDF) 20 Page - Analog Devices |
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AD5941 Datasheet(HTML) 20 Page - Analog Devices |
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20 / 134 page  AD5940/AD5941 Data Sheet Rev. C | Page 20 of 134 Table 7. Pin Function Descriptions Pin No. Mnemonic Input/Output Supply Description AD5940 AD5941 A1 28 AFE4 Analog Uncommitted Analog Front End Pin 4. A2 27 AFE3 Analog Uncommitted Analog Front End Pin 3. A3 37 AIN2 Analog Uncommitted Analog Input Pin 2. This pin connects to the switch matrix. A4 41 AVDD Supply Analog Circuit Power. Short this pin to Pin F2 (AVDD). A5 43 VREF_1V82 Analog 1.82 V Reference Decoupling Capacitor Pin. The recommended capacitor value is 4.7 µF. A6 45 SE0 Analog Sense Electrode Input Pin for High Bandwidth and Low Bandwidth Loop Circuits. This pin connects to the switch matrix. A7 47 CE0 Analog Counter Electrode Input Pin for High Bandwidth and Low Bandwidth Loop Circuits. This pin connects to the switch matrix. A8 48 RE0 Analog Reference Electrode Input Pin for High Bandwidth and Low Bandwidth Loop Circuits. This pin connects to positive node of the switch matrix. B1 33 RCAL1 Analog Terminal B of Calibration Resistor (RCAL). Connect this pin to the switch matrix. B2 34 AFE1 Analog Uncommitted Analog Front End Pin 1. B3 38 AIN1 Analog Uncommitted Analog Input Pin 1. This pin connects to the switch matrix. B4 40 AIN4/LPF0 Analog Uncommitted Analog Input Pin 4 (AIN4). Low Power TIA Output Low-Pass Filter Capacitor Pin (LPF0). B5 36 AIN3/BUF_VREF1V8 Analog Uncommitted Analog Input Pin 3 (AIN3). 1.82 V Reference Buffered Output (BUF_VREF1V8). This pin connects to the switch matrix. B6 46 DE0 Analog Analog Input Pin. This pin connects to the input and output of the high speed TIA. B7 9 VZERO0 Analog Low Power, Dual-Output DAC, Zero Voltage Output Pin. Connect a 100 nF capacitor to this pin. B8 2 RC0_1 Analog Low Power TIA Reconstruction Filter 0 Feedback Pin 1. This pin is connected to the output of the low power TIA. C1 32 RCAL0 Analog Terminal A of Calibration Resistor. Connect this pin to the switch matrix. C2 35 AFE2 Analog Uncommitted Analog Front End Pin 2. C3, D3 N/A DNC Analog Do Not Connect. Do not connect to this pin. C4 42 AGND Ground Analog Ground. Short this pin to Pin E3 (AGND). C5 N/A AIN6 Analog Uncommitted Analog Input Pin 6. C6 1 RC0_2 Analog Low Power TIA Reconstruction Filter 0 Pin 2. This pin can be left open (optional). C7 8 VBIAS0 Analog Low Power, Dual-Output DAC Bias Voltage Output Pin. Connect a 100 nF capacitor to this pin. C8 3 RC0_0 Analog Low Power TIA Feedback Pin. This pin is connected to the feedback of the low power TIA. D1 31 VBIAS_CAP Analog ADC 1.11 V Input Bias Decoupling Capacitor Pin. The recommended capacitor value is 470 nF. D2 39 AIN0 Analog Uncommitted Analog Input Pin 0. This pin connects to the switch matrix. D4, G1, G8 7, 10, 24 DNC Not applicable Do Not Connect. Do not connect to this pin. D5 44 AGND_REF Ground Analog Reference Ground. D6 20 GPIO1 Digital input/output General-Purpose Input/Output Pin 1. D7 4 VREF_2V5 Analog 2.5 V Analog Reference Decoupling Capacitor Pin. Connect a 470 nF capacitor to this pin. D8 5 AVDD_REG Supply Analog Regulator Decoupling Capacitor Pin. |
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