The APA2176/2176A,APA2177,APA2178 is a stereo, fixed gain, and cap-free headphone driver which is available in TQFN4x4 20-pin, TQFN3x3 16-pin (APA2176A) or TSSOP-16 package. Dual supply voltage pro

Features

No Output Capacitor Required

Dual Supply Voltage (PVDD>VDD)

– VDD=1.8 ~5.5V

– PVDD=2.2 ~ 5.5V

Meeting VISTA Requirements

Output Power

at 1% THD+N

-200mW, at VDD=3.3V, PVDD=5.0V, RL=16Ω

-55mW, at VDD=1.8V, PVDD=3.0V, RL=16Ω

at 10% THD+N

-270mW, at VDD=3.3V, PVDD=5.0V, RL=16Ω

-70mW, at VDD=1.8V, PVDD=3.0V, RL=16Ω

Less External Components Required

High PSRR: 80dB at 217Hz

Fast Start-Up Time : 120µs

Short-Circuit and Thermal Protection

Surface-Mount Package

– TQFN4x4-20B (with Enhanced Thermal Pad)

– TSSOP-16

– TQFN3x3-16 (with Enhanced Thermal Pad)

General Description

The APA2176/2176A,APA2177,APA2178 is a stereo, fixed gain, and cap-free

headphone driver which is available in TQFN4x4 20-pin,

TQFN3x3 16-pin (APA2176A) or TSSOP-16 package. Dual

supply voltage provides higher efficiency and better power

ripple rejection.

The APA2176/2176A is designed with ground-reference

output and no need the output capacitors for DC blocking.

The advantages of eliminating the output capacitor are

saving the cost, PCB’s space, and component height.

The built-in gain setting can minimize the external com-

ponent counts and save the PCB space. High PSRR pro-

vides increased immunity to noise and RF rectification. In

addition to these features, a fast start-up time and small

package size make the APA2176/2176A an ideal choice

for portable multimedia devices.

Moreover, the APA2176/2176A is also equipped other

features. For example, at THD+N=1%, it is capable of

driving 200mW at V DD=3.3V, PV DD=5.0V into 16Ω. In

addition, it provides thermal and short circuit protections.

Simplified Application Circuit

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