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AD5940 Datasheet(PDF) 18 Page - Analog Devices |
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AD5940 Datasheet(HTML) 18 Page - Analog Devices |
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18 / 130 page  AD5940 Data Sheet Rev. 0 | Page 18 of 130 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 1 A B C D E F G 2 3 4 5 6 7 AFE4 AFE3 AIN2 AVDD VREF_1V82 SE0 CE0 RE0 RCAL1 AFE1 AIN1 AIN4/ LPF0 AIN3/ BUF_VREF1V8 DE0 VZERO0 RC0_1 RCAL0 AFE2 DNC AIN6 RC0_2 VBIAS0 RC0_0 VBIAS_CAP AIN0 DNC DNC AGND_REF GPIO1 VREF_2V5 AVDD_REG GPIO2 GPIO3 AGND DGND DGND DGND MOSI MISO RESET AVDD DVDD GPIO6 GPIO0 GPIO5 CS SCLK DNC IOVDD DVDD_ REG_1V8 GPIO7 XTALI XTALO GPIO4 DNC 8 ANALOG POWER/GROUND DIGITAL POWER/GROUND DIGITAL DNC = DO NOT CONNECT. AD5940 TOP VIEW (BALL SIDE DOWN) Not to Scale XTAL ANALOG REFERENCE AGND Figure 4. Pin Configuration Table 7. Pin Function Descriptions Pin No. Mnemonic Input/Output Supply Description A1 AFE4 Analog Uncommitted Analog Front End Pin 4. A2 AFE3 Analog Uncommitted Analog Front End Pin 3. A3 AIN2 Analog Uncommitted Analog Input Pin 2. This pin connects to the switch matrix. A4 AVDD Supply Analog Circuit Power. Short this pin to Pin F2 (AVDD). A5 VREF_1V82 Analog 1.82 V Reference Decoupling Capacitor Pin. A6 SE0 Analog Sense Electrode Input Pin for High Bandwidth and Low Bandwidth Loop Circuits. This pin connects to the switch matrix. A7 CE0 Analog Counter Electrode Input Pin for High Bandwidth and Low Bandwidth Loop Circuits. This pin connects to the switch matrix. A8 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 RCAL1 Analog Terminal B of Calibration Resistor (RCAL). Connect this pin to the switch matrix. B2 AFE1 Analog Uncommitted Analog Front End Pin 1. B3 AIN1 Analog Uncommitted Analog Input Pin 1. This pin connects to the switch matrix. B4 AIN4/LPF0 Analog Uncommitted Analog Input Pin 4 (AIN4). Low Power TIA Output Low-Pass Filter Capacitor Pin (LPF0). B5 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 DE0 Analog Analog Input Pin. This pin connects to the input and output of the high speed TIA. B7 VZERO0 Analog Low Power, Dual-Output DAC Zero Voltage Output Pin. |
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