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AD7801BR Datenblatt(PDF) 4 Page - Analog Devices |
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AD7801BR Datenblatt(HTML) 4 Page - Analog Devices |
4 / 16 page AD7801 –4– REV. 0 PIN FUNCTION DESCRIPTIONS Pin No. Mnemonic Function 1–8 D7–D0 Parallel Data Inputs. 8-bit data is loaded to the input register of the AD7801 under the control of CS and WR. 9 CS Chip Select. Active low logic input. 10 WR Write Input. WR is an active low logic input used in conjunction with CS to write data to the input register. 11 DGND Digital Ground 12 PD Active low input used to put the part into low power mode reducing current consumption to less than 1 µA. 13 LDAC Load DAC Logic Input. When this logic input is taken low the DAC output is updated with the contents of its DAC register. If LDAC is permanently tied low the DAC is updated on the rising edge of WR. 14 CLR Asynchronous Clear Input (Active Low). When this input is taken low the DAC register is loaded with all zeroes and the DAC output is cleared to zero volts. 15 VDD Power Supply Input. This part can be operated from +2.7 V to +5.5 V and should be decoupled to GND. 16 REFIN External Reference Input. This can be used as the reference for the DAC. The range on this reference input is 1 V to VDD/2. If REFIN is tied directly to VDD the internal VDD/2 reference is selected. 17 AGND Analog Ground reference point and return point for all analog current on the part. 18 NC No Connect Pin. 19 VOUT Analog Output Voltage from the DAC. The output amplifier can swing rail to rail on its output. 20 DGND Digital Ground reference point and return point for all digital current on the part. PIN CONFIGURATION 14 13 12 11 17 16 15 20 19 18 10 9 8 1 2 3 4 7 6 5 TOP VIEW (Not to Scale) AD7801 NC = NO CONNECT (MSB) DB7 AGND NC VOUT DGND DB6 DB5 DB4 CLR VDD REFIN DB3 DB2 DB1 (LSB) DB0 CS WR DGND PD LDAC |
Ähnliche Teilenummer - AD7801BR |
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Ähnliche Beschreibung - AD7801BR |
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