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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TAS5711PHPR датащи(PDF) 40 Page - Texas Instruments |
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TAS5711PHPR датащи(HTML) 40 Page - Texas Instruments |
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40 / 74 page  TAS5711 SLOS600A – DECEMBER 2009 – REVISED AUGUST 2010 www.ti.com Shutdown Sequence Enter: 1. Write 0x40 to register 0x05. 2. Wait at least 1 ms + 1.3 × tstop (where tstop is specified by register 0x1A). 3. If desired, reconfigure by returning to step 4 of initialization sequence. Exit: 1. Write 0x00 to register 0x05 (exit shutdown command may not be serviced for as much as 240 ms after trim following AVDD/DVDD powerup ramp). 2. Wait at least 1 ms + 1.3 × tstart (where tstart is 300 ms when mid-Z ramp is enabled and is otherwise specified by register 0x1A). 3. Proceed with normal operation. Power-Down Sequence Use the following sequence to powerdown the device and its supplies: 1. If time permits, enter shutdown (sequence defined above); else, in case of sudden power loss, assert PDN = 0 and wait at least 2 ms. 2. Assert RESET = 0. 3. Drive digital inputs low and ramp down PVDD supply as follows: • Drive all digital inputs low after RESET has been low for at least 2 µs. • Ramp down PVDD while ensuring that it remains above 8 V until RESET has been low for at least 2 µs. 4. Ramp down AVDD/DVDD while ensuring that it remains above 3 V until PVDD is below 6 V and that it is never more than 2.5 V below the digital inputs. 40 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): TAS5711 |
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