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AD5664R Datasheet(PDF) 9 Page - Analog Devices |
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AD5664R Datasheet(HTML) 9 Page - Analog Devices |
9 / 28 page AD5624R/AD5644R/AD5664R Rev. A | Page 9 of 28 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 1 VOUTA 10 VREFIN/VREFOUT 2 VOUTB 9 VDD 3 GND 8 DIN 4 VOUTC 7 SCLK 5 VOUTD 6 SYNC AD5624R/ AD5644R/ AD5664R TOP VIEW (Not to Scale) EXPOSED PAD TIED TO GND ON LFCSP PACKAGE Figure 3. Pin Configuration Table 7. Pin Function Descriptions Pin No. Mnemonic Description 1 VOUTA Analog Output Voltage from DAC A. The output amplifier has rail-to-rail operation. 2 VOUTB Analog Output Voltage from DAC B. The output amplifier has rail-to-rail operation. 3 GND Ground Reference Point for all Circuitry on the Part. 4 VOUTC Analog Output Voltage from DAC C. The output amplifier has rail-to-rail operation. 5 VOUTD Analog Output Voltage from DAC D. The output amplifier has rail-to-rail operation. 6 SYNC Active Low Control Input. This is the frame synchronization signal for the input data. When SYNC goes low, it powers on the SCLK and DIN buffers and enables the input shift register. Data is transferred in on the falling edges of the next 24 clocks. If SYNC is taken high before the 24th falling edge, the rising edge of SYNC acts as an interrupt and the write sequence is ignored by the device. 7 SCLK Serial Clock Input. Data is clocked into the input shift register on the falling edge of the serial clock input. Data can be transferred at rates up to 50 MHz. 8 DIN Serial Data Input. This device has a 24-bit shift register. Data is clocked into the register on the falling edge of the serial clock input. 9 VDD Power Supply Input. These parts can be operated from 2.7 V to 5.5 V, and the supply should be decoupled with a 10 μF capacitor in parallel with a 0.1 μF capacitor to GND. 10 VREFIN/VREFOUT The AD5624R/AD5644R/AD5664R have a common pin for reference input and reference output. When using the internal reference, this is the reference output pin. When using an external reference, this is the reference input pin. The default for this pin is as a reference input. |
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