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_

+

GND

A3

B3

A1

B2

To Battery

Bias

Circuitry

IN–

IN+

C3

C2

B1

+

–

IN

SHUTDOWN

C1

†

_

+

GND

A3

B3

A1

B2

To Battery

Bias

Circuitry

IN–

IN+

C3

C2

B1

IN

SHUTDOWN

C1

†

(1)

TPA6203A1

SLOS364C – MARCH 2002 – REVISED SEPTEMBER 2003

Figure 29. Differential Input Application Schematic Optimized With Input Capacitors

Figure 30. Single-Ended Input Application Schematic

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.

Selecting Components

CMRR, PSRR, and the cancellation of the second

harmonic distortion diminishes if resistor mismatch

occurs. Therefore, it is recommended to use 1%

tolerance resistors or better to keep the performance

gain of the amplifier according to Equation 1.

optimized.

10