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AD7302BRUZ 데이터시트(PDF) 5 Page - Analog Devices |
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AD7302BRUZ 데이터시트(HTML) 5 Page - Analog Devices |
5 / 16 page AD7302 –5– REV. 0 PIN FUNCTION DESCRIPTIONS Pin No. Mnemonic Function 1-8 D7–D0 Parallel Data Inputs. Eight-bit data is loaded to the input register of the AD7302 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 and A/B to write data to the selected DAC register. 11 A/B DAC Select. Address pin used to select writing to either DAC A or DAC B. 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 both DAC outputs are simultaneously updated with the contents of their DAC registers. If LDAC is permanently tied low, the DACs are updated on the rising edge of WR. 14 CLR Asynchronous Clear Input (Active Low). When this input is taken low the DAC registers are loaded with all zeroes and the DAC outputs are cleared to zero volts. 15 VDD Power Supply Input. These parts can be operated from 2.7 V to 5.5 V and should be decoupled to AGND. 16 REFIN External Reference Input. This can used as the reference for both DACs. The range on this reference input is 1 V to VDD/2. If REFIN is directly tied 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 VOUTB Analog output voltage from DAC B. The output amplifier can swing rail to rail on its output. 19 VOUTA Analog output voltage from DAC A. 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) AD7302 (MSB) DB7 AGND VOUTB VOUTA DGND DB6 DB5 DB4 CLR VDD REFIN DB3 DB2 DB1 (LSB) DB0 CS WR A/B PD LDAC |
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