Description
The A21SP16 is a differential class-D BTL power amplifier. It is able to drive up to 2.3 W into a 4  load and 1.4 W into a 8  load at 5 V. It achieves outstanding efficiency (88% typ.) compared to classical Class-AB audio amps. The gain of the device can be controlled via two external gain-setting resistors. Pop & click reduction circuitry provides low on/off switch noise while allowing the device to start within 5 ms. A standby function (active low) allows the reduction of current consumption to 10 nA typ. VDD 1/A1 7/C1 8/C2 9/C3 4/B1 6/B3 2/A2 3/A3 5/B2 VDD ININ+ GND STBY GND OUT+ OUTVDD 1/A1 7/C1 8/C2 9/C3 4/B1 6/B3 2/A2 3/A3 5/B2 VDD ININ+ GND STBY GND OUT+ OUT-