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AMC7891 Datasheet(PDF) 3 Page - Texas Instruments |
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AMC7891 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 41 page AMC7891 www.ti.com SBAS518A – AUGUST 2011 – REVISED DECEMBER 2011 AMC7891 Pin Functions (continued) PIN I/O DESCRIPTION NO. NAME 11 DACOUT2 O DAC2 buffered output. (0 V to AVDD). Can source/sink up to 10 mA. 12 DACOUT1 O DAC1 buffered output. (0 V to AVDD). Can source/sink up to 10 mA. 13 DACOUT0 O DAC0 buffered output. (0 V to AVDD). Can source/sink up to 10 mA. 14 AGND2 I Analog ground. Ground reference point for all analog circuitry on the device, AGND. Connect AGND1 and AGND2 to the same potential, AGND. 15 GPIOC3 I/O General purpose digital I/O C3. Maximum voltage is set by GPIOVDD 16 GPIOC2 I/O General purpose digital I/O C2. Maximum voltage is set by GPIOVDD 17 GPIOC1 I/O General purpose digital I/O C1. Maximum voltage is set by GPIOVDD 18 GPIOC0 I/O General purpose digital I/O C0. Maximum voltage is set by GPIOVDD 19 DAV O ADC data available indicator. Open-drain, active low output. In direct-mode, DAV goes low when an ADC conversion cycle finishes. In auto-mode a 1 µs pulse appears on this pin when the conversion cycle finishes (see ADC Operation for details). DAV stays high when deactivated. If used, an external 10 k Ω pull-up resistor to GPIOVDD is required. If unused, the pin can be connected to DGND. 20 GPIOB3 I/O General purpose digital I/O B3. Maximum voltage is set by GPIOVDD 21 GPIOB2 I/O General purpose digital I/O B2. Maximum voltage is set by GPIOVDD 22 GPIOB1 I/O General purpose digital I/O B1. Maximum voltage is set by GPIOVDD 23 GPIOB0 I/O General purpose digital I/O B1. Maximum voltage is set by GPIOVDD 24 GPIOA3 I/O General purpose digital I/O A3. Maximum voltage is set by GPIOVDD 25 GPIOA2 I/O General purpose digital I/O A2. Maximum voltage is set by GPIOVDD 26 GPIOA1 I/O General purpose digital I/O A1. Maximum voltage is set by GPIOVDD 27 GPIOA0 I/O General purpose digital I/O A1. Maximum voltage is set by GPIOVDD 28 AIN0 I Uncommitted analog input 0. (0 V to 5 V) 29 AIN1 I Uncommitted analog input 1. (0 V to 5 V) 30 AIN2 I Uncommitted analog input 2. (0 V to 5 V) 31 AIN3 I Uncommitted analog input 3. (0 V to 5 V) 32 AIN4 I Uncommitted analog input 4. (0 V to 5 V) 33 AIN5 I Uncommitted analog input 5. (0 V to 5 V) 34 AIN6 I Uncommitted analog input 6. (0 V to 5 V) 35 AIN7 I Uncommitted analog input 7. (0 V to 5 V) 36 REF I/O Used as external ADC reference input when the internal reference buffer is disabled in register AMC_power, ref_on = ‘0’ (default). A decoupling capacitor is recommended between the external reference output an AGND for noise filtering. Used as internal reference output when the internal reference buffer is enabled in register AMC_power, ref_on = ‘1’. Requires a 4.7 µF decoupling capacitor to AGND when used as reference output. An external buffer amplifier with high impedance input is required to drive an external load. – THERMAL – The thermal pad is located on the package underside. Connect to the board ground plane using multiple vias. PAD Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): AMC7891 |
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