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DAC7563SDGST 데이터시트(PDF) 6 Page - Texas Instruments |
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DAC7563SDGST 데이터시트(HTML) 6 Page - Texas Instruments |
6 / 58 page V A OUT V B OUT GND LDAC CLR 1 2 3 4 5 6 7 8 9 10 SYNC SYNC SCLK SCLK D IN D IN AV DD AV DD V /V REFIN REFOUT V /V REFIN REFOUT 1 2 3 4 5 6 7 8 9 10 V A OUT V B OUT GND LDAC CLR DGS (Top View) DSC (Top View) MSOP Package SON Package Thermal Pad (1) DAC8562, DAC8563 DAC8162, DAC8163 DAC7562, DAC7563 SLAS719D – AUGUST 2010 – REVISED AUGUST 2012 www.ti.com PIN CONFIGURATIONS (1) It is recommended to connect the thermal pad to the ground plane for better thermal dissipation. Table 2. PIN DESCRIPTIONS PIN DESCRIPTION NAME NO. AVDD 9 Power-supply input, 2.7 V to 5.5 V Asynchronous clear input. The CLR input is falling-edge sensitive. When CLR is activated, zero scale (DACxx62) or mid-scale (DACxx63) is loaded to all input and DAC registers. This sets the DAC output CLR 5 voltages accordingly. The part exits clear code mode on the 24th falling edge of the next write to the part. If CLR is activated during a write sequence, the write is aborted. Serial data input. Data are clocked into the 24-bit input shift register on each falling edge of the serial clock DIN 8 input. Schmitt-trigger logic input GND 3 Ground reference point for all circuitry on the device In synchronous mode, data are updated with the falling edge of the 24th SCLK cycle, which follows a falling edge of SYNC. For such synchronous updates, the LDAC pin is not required, and it must be connected to GND permanently or asserted and held low before sending commands to the device. LDAC 4 In asynchronous mode, the LDAC pin is used as a negative edge-triggered timing signal for simultaneous DAC updates. Multiple single-channel commands can be written in order to set different channel buffers to desired values and then make a falling edge on LDAC pin to simultaneously update the DAC output registers. SCLK 7 Serial clock input. Data can be transferred at rates up to 50 MHz. Schmitt-trigger logic input Level-triggered control input (active-low). This input is the frame synchronization signal for the input data. When SYNC goes low, it enables the input shift register, and data are sampled on subsequent falling clock SYNC 6 edges. The DAC output updates following the 24th clock falling edge. If SYNC is taken high before the 23rd clock edge, the rising edge of SYNC acts as an interrupt, and the write sequence is ignored by the DAC756x/DAC816x/DAC856x. Schmitt-trigger logic input VOUTA 1 Analog output voltage from DAC-A VOUTB 2 Analog output voltage from DAC-B VREFIN / VREFOUT 10 Bidirectional voltage reference pin. If internal reference is used, 2.5-V output. 6 Submit Documentation Feedback Copyright © 2010–2012, Texas Instruments Incorporated Product Folder Links: DAC8562 DAC8563 DAC8162 DAC8163 DAC7562 DAC7563 |
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