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DAC8775IRWFT Fiches technique(PDF) 5 Page - Texas Instruments |
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DAC8775IRWFT Fiches technique(HTML) 5 Page - Texas Instruments |
5 / 81 page 5 DAC8775 www.ti.com SLVSBY7 – FEBRUARY 2017 Product Folder Links: DAC8775 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated Pin Functions (continued) PIN DESCRIPTION NAME NO. IOUT_B 41 Current Output Pin (Channel B) VPOS_IN_B 42 Positive power supply for VOUT_B and IOUT_B VOUT_B 43 Voltage Output Pin (Channel B) AVDD 44 Power supply for all analog circuitry of the device except buck-boost converters and output amplifiers REFGND 45 Reference ground REFIN 46 Reference input REFOUT 47 Internal reference output. Connects to REFIN when using internal reference. VOUT_C 48 Voltage Output Pin (Channel C) VPOS_IN_C 49 Positive power supply for VOUT_C and IOUT_C IOUT_C 50 Current Output Pin (Channel C) VNEG_IN_C 51 Negative power supply for VOUT_C and IOUT_C VOUT_D 52 Voltage Output Pin (Channel D) VPOS_IN_D 53 Positive power supply for VOUT_D and IOUT_D IOUT_D 54 Current Output Pin (Channel D) VNEG_IN_D 55 Negative power supply for VOUT_D and IOUT_D DAC_AGND_CD 56 Analog GND DAC Channels C and D VSENSEN_D 57 Sense output pin for the negative voltage output (channel D) load connection. VSENSEP_D 58 Sense output pin for the positive voltage output (channel D) load connection. VSENSEN_C 59 Sense output pin for the negative voltage output (channel C) load connection. VSENSEP_C 60 Sense output pin for the positive voltage output (channel C) load connection. CCOMP_D 61 External compensation capacitor connection pin for VOUT_D . Addition of the external capacitor improves the stability with high capacitive loads at the VOUT_D pin by reducing the bandwidth of the output amplifier at the expense of increased settling time. HARTIN_D 62 Input pin for HART modulation. for IOUT_D CCOMP_C 63 External compensation capacitor connection pin for VOUT_C . Addition of the external capacitor improves the stability with high capacitive loads at the VOUT_C pin by reducing the bandwidth of the output amplifier at the expense of increased settling time. HARTIN_C 64 Input pin for HART modulation. for IOUT_C DVDD_EN 65 Internal power-supply enable pin. Connect this pin to PBKG to disable the internal DVDD, or leave this pin unconnected to enable the internal DVDD. When this pin is connected to PBKG, an external supply must be connected to the DVDD pin. DVDD 66 Digital Supply pin (Input/Output) Internal DVDD enabled when DVDD_EN is floating, External DVDD must be supplied when DVDD_EN is connected to PBKG ALARM 67 ALARM pin. Open drain output. External pull-up resistor required (10 kΩ). The pin goes low (active) when the ALARM condition is detected on any of the outputs (OUT_A through OUT_D) (open circuit, over temperature, watchdog timeout, and others). RESET 68 Reset input (active low). Logic low on this pin causes the device to perform a reset. A hardware reset must be issued using this pin after power up. PBKG 69 Chip substrate, connect to 0 V VNEG_IN_C 70 Negative power supply for VOUT_C VNEG_IN_D 71 Negative power supply for VOUT_D DCDC_AGND_CD 72 Analog GND Buck-Boost converter Channels C and D |
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