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AD7805BRS Datenblatt(PDF) 7 Page - Analog Devices |
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AD7805BRS Datenblatt(HTML) 7 Page - Analog Devices |
7 / 28 page AD7804/AD7805/AD7808/AD7809 –7– REV. A AD7804/AD7808 PIN FUNCTION DESCRIPTION AD7804 AD7808 Pin No. Pin No. Mnemonic Description 1 1, 6 AGND Ground reference point for analog circuitry. 2, 3 2, 3 VOUTB, VOUTA Analog output voltage from the DACs. 4 4 REFOUT Reference Output. This is a bandgap reference and is typically 1.23 V. 5 PD Active low input used to put the part into low power mode reducing current consumption to 1 µA. 7, 8 VOUTF, VOUTE Analog output voltages from the DACs. 59 FSIN Level-triggered control input (active low). This is the frame synchronization signal for the input data. When FSIN goes low, it enables the input shift register and data is transferred on the falling edges of CLKIN. 610 LDAC LDAC Input. When this digital input is taken low, all DAC registers are simultaneously updated with the contents of the data registers. If LDAC is tied permanently low, or is low on the sixteenth falling clock edge with timing similar to that of SDIN, an automatic update will take place. 7 11 SDIN Serial Data Input. These devices accept a 16-bit word. Data is clocked into the input shift register on the falling edge of CLKIN. 8 12 DGND Ground reference point for digital circuitry. 913 DVDD Digital Power Supply. 10 14 CLKIN Clock Input. Data is clocked into the input shift register on the falling edges of CLKIN. Duty Cycle should be between 40% and 60%. 11 15 CLR Asynchronous CLR Input. When this input is taken low, all Main DAC outputs are cleared either to VBIAS or to VBIAS/16 volts. All Sub DACs are also cleared and thus the transfer function of the Main DAC will remain centered around the VBIAS point. 16 NC No Connect. This pin should be left open circuit. 17, 18 VOUTH, VOUTG Analog output voltages from the DACs. 12 20 REFIN This is an external reference input for the DACs. When this reference is selected for a DAC in the control register, the analog output from the selected DAC swings around this point. 13 21 COMP Compensation Pin. This pin provides an output from the internal VDD/2 divider and is provided for ac bypass purposes only. This pin should be decoupled with 1 nF capacitors to both AVDD and AGND. This pin can be overdriven with an external reference, thus giving the facility for two external references on the part. 14, 15 22, 23 VOUTD, VOUTC Analog output voltage from the DACs. 16 19, 24 AVDD Analog Power Supply. +3.3 V to +5 V. AD7804 PIN CONFIGURATION TOP VIEW (Not to Scale) 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 AGND VOUTB VOUTA REFOUT FSIN LDAC SDIN DGND AVDD VOUTC VOUTD COMP REFIN CLR CLKIN DVDD AD7804 AD7808 PIN CONFIGURATION TOP VIEW (Not to Scale) 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 9 10 11 12 AD7808 NC = NO CONNECT DGND SDIN LDAC FSIN VOUTE AGND VOUTB VOUTA REFOUT VOUTF AGND PD DVDD CLKIN CLR NC VOUTH AVDD VOUTC VOUTD COMP VOUTG AVDD REFIN |
Ähnliche Teilenummer - AD7805BRS |
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Ähnliche Beschreibung - AD7805BRS |
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