-3 dB

c

I I

1

f

2 R C

S

F

I

R

Gain

R

19

TPA6211A1-Q1

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SBOS555C – JUNE 2011 – REVISED AUGUST 2016

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Table 4. Design Parameters

PARAMETER

EXAMPLE VALUE

Power supply voltage

2.5 V to 5.5 V

Current

4 mA to 5 mA

Shutdown

High > 1.55 V

Low < 0.5 V

Speaker

3

Ω, 4 Ω, or 8 Ω

8.2.1.2 Detailed Design Procedure

8.2.1.2.1

(18)

Resistor matching is very important in fully differential amplifiers. The balance of the output on the reference

voltage depends on matched ratios of the resistors. CMRR, PSRR, and the cancellation of the second harmonic

distortion diminishes if resistor mismatch occurs. Therefore, TI recommends 1%-tolerance resistors or better to

optimize performance.

8.2.1.2.2

The internal voltage divider at the BYPASS pin of this device sets a mid-supply voltage for internal references

capacitor, the slower the rise time.

8.2.1.2.3

The TPA6211A1-Q1 device does not require input coupling capacitors when driven by a differential input source

capacitors.

Equation 19.

(19)

Figure 32. Input Filter Cutoff Frequency

100 Hz. Equation 19 is reconfigured as Equation 20.