TAS5411-Q1: MUTE PIN spec of TAS5411-Q1

Xiaowei Bai1

Part Number: TAS5411-Q1

Hello Team,

can you help to clarify the MUTE pin spec of TAS5411? I didn't find it in the data sheet, example high/low threshold, sink current, pin architecture etc. thanks.

Xiaowei Bai

over 4 years ago

0 Gregg Scott over 4 years ago

TI__Mastermind 45085 points

Hello Xiaowei,

The MUTE pin spec is the same as the STANDBY pin specification. This is in section 7.3, Recommended Operating Conditions in the datasheet.

0 Xiaowei Bai1 over 4 years ago in reply to Gregg Scott

TI__Intellectual 1205 points

Hello Scott,

thank for your feedback, I have checked the STANDBY pin spec, but I found which is different between datasheet spec and my test. as below:

STANDBY PIN current is max 0.2uA, but MUTE current is about 140uA according to the test result(detail as below).

customer schematic:

Detail:

VAUD_VCC = 3.343V

VTP649 = 2.642V

VAP_MUTE = 2.493V

please help to confirm it on the EVM and clarify this issue, thanks very much.

0 Gregg Scott over 4 years ago in reply to Xiaowei Bai1

TI__Mastermind 45085 points

Xiaowei,

Please remove the capacitor and measure again. This can be a source of leakage current.

0 Xiaowei Bai1 over 4 years ago in reply to Gregg Scott

TI__Intellectual 1205 points

Hello Scott,

There is the same result when we removed capacitor, so can you help to clarify it? thanks..

Xiaowei Bai

0 Gregg Scott over 4 years ago in reply to Xiaowei Bai1

TI__Mastermind 45085 points

Hello Xiaowei,

I used a Keithley 2420 Sourcemeter to measure the current in the Standby pin when forced to 3.3Vdc without a series resistor. The current is measured is less than 0.001uA. I set the forced voltage to 2.493Vdc and I have the same measurement of 0.001uA.

I used my voltmeter to measure the voltage on the sourcemeter. The voltmeter current draw was 6.5uA. Your 140uA may be your voltmeter current measurement needs to measure the voltage.

0 Xiaowei Bai1 over 4 years ago in reply to Gregg Scott

TI__Intellectual 1205 points

Hello Scott,

can you help to test the MUTE PIN? because of customer report issue on the MUTE PIN.

and I have ask for customer to check the STANDBY pin.

140uA is calculated by dropping voltage on the resister, thanks..

Xiaowei

0 Xiaowei Bai1 over 4 years ago in reply to Xiaowei Bai1

TI__Intellectual 1205 points

Hello Scott,

I just confirmed the result from customer. actually this phenomenon is happened when TAS5411 going to STANDBY status, and it work well during TAS5411 in active status.

so do you think which is normal phenomenon? thanks.

Xiaowei

0 Gregg Scott over 4 years ago in reply to Xiaowei Bai1

TI__Mastermind 45085 points

Xiaowei,

The internal structure of the MUTE pin is the same as the STANDBY pin. The Mute pin can have a bit more current when in standby mode when pulled high. I measure 136uA.

0 Xiaowei Bai1 over 4 years ago in reply to Gregg Scott

TI__Intellectual 1205 points

Hello Scott,

thanks for your support and clarification. so I think that is the normal status, right?

Xiaowei

+1 Gregg Scott over 4 years ago in reply to Xiaowei Bai1

TI__Mastermind 45085 points

Xiaowei,

This is normal for the Mute pin when the device is in Standby mode. Please click Solved if this as solved your questions.

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TAS5411-Q1: MUTE PIN spec of TAS5411-Q1