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TAS2505: About Electrical Characteristics in TAS2505 data sheet

user777540
Expert 1020 points
Part Number: TAS2505


Hello,


There is a description of "Power down POR, / RST held low, AVDD = 1.8V, IOVDD = 1.8 V, SPKVDD = 4.2 V, DVDD = 1.8 V" in the Device setup line of SHUTDOWN POWER CONSUMPTION.
Is the current consumption in each part the values shown in the table by controlling / RST to low with all power supplies turned on?

Best regards,

  • 0
    TI__Guru* 84915 points

    Hi, 

    My colleague will that a look at this question and will answer as soon as possible.

    Best regards,
    Luis Fernando Rodríguez S.

  • 0
    TI__Mastermind 22312 points

    Hello, 

    If you are referring to this table above found in the Electrical Characteristics of the datasheet. 

    Yes, the values as seen in the table are with the power supplies turned on to the given voltages and the power down POR (power-on reset) and /RST held low. 

    Please let me know if you have further questions. 

    All the best, 

    Carolina Gomez

  • 0 in reply to Caro Walter
    Expert 1020 points

    Hello,

    In the response SHUTDOWN POWER CONSUMPTION, even if the operation is as follows, is the current consumption set to the value in the table by setting / RST = low at the end?
    If the current consumption does not decrease with this control, what kind of control should I do?

    1. Turn on all power supplies and set / RST = high.
    2. Perform normal operations (register control and communication with the CPU).
    3. Set / RST = low.

    Best regards,

  • 0 in reply to user777540
    TI__Mastermind 22312 points

    Hello, 

    Did you disable POR? The function consumes approximately 35 uA from DVDD. 

    Best Regards, 

    Carolina

  • 0 in reply to Caro Walter
    Expert 1020 points

    Hello,

    POR is not disabled.

    In the response SHUTDOWN POWER CONSUMPTION, even if the operation is as follows, is the current consumption set to the value in the table by setting / RST = low at the end?

    1. Turn on all power supplies and set / RST = high.

    2. Perform normal operations (register control and communication with the CPU).

    3. Set / RST = low.

    Best regards,

  • 0 in reply to user777540
    TI__Mastermind 22312 points

    Hello, 

    POR should be disabled, this can be done by setting Page 1, Reg 1, bit D3 =1. 

    Yes the /RST should be held low at the end. 

    All the best, 

    Carolina 

  • 0 in reply to Caro Walter
    TI__Mastermind 22312 points

    Additionally, 

    Are you setting /rst low by the pin or by a software reset using the register bit?

    /RST pin resets I2C, I2S, signal processing and all registers, while SW_RST from register bit resets only the signal processing and all registers but not the digital interfaces. 

    Best Regards, 

    Carolina Gomez

  • 0 in reply to Caro Walter
    Expert 1020 points

    Hello,

    About SHUTDOWN POWER CONSUMPTION of Electrical Characteristics
    If the operation is as follows, will the current consumption become the typical value in the table by setting / RSTpin = low at the end?

    1. Turn on all power supplies and set / RSTpin = high.

    2. POR  Do not power down(Page 1, Reg 1, bit D3 =0) 
    3. Perform normal operations (register control and communication with the CPU).

    4. POR  Power down(Page 1, Reg 1, bit D3 =1) 
    5. Set / RSTpin = low.

    Best regards,

  • 0 in reply to user777540
    TI__Mastermind 22312 points

    Hello, 

    What power on sequence are you using? Are you using internal LDO? 

    All the best, 

    Carolina Gomez

  • 0 in reply to Caro Walter
    Expert 1020 points

    Hello,

    What power on sequence are you using?

    Are you using internal LDO? 

    →The internal LDO is not used.

    The configuration is “Figure 1-2. Typical Circuit Configuration”.

    Can you tell me about the following?

    About SHUTDOWN POWER CONSUMPTION of Electrical Characteristics
    If the operation is as follows, will the current consumption become the typical value in the table by setting / RSTpin = low at the end?

    1. Turn on all power supplies and set / RSTpin = high.

    2. POR  Do not power down(Page 1, Reg 1, bit D3 =0) 
    3. Perform normal operations (register control and communication with the CPU).

    4. POR  Power down(Page 1, Reg 1, bit D3 =1) 
    5. Set / RSTpin = low.

    Best regards,

  • 0 in reply to user777540
    TI__Mastermind 22312 points

    Hello, 

    Yes that is the correct sequence. 

    Are you performing the measurements on one of our EVMs? 

    All the best, 

    Carolina Gomez