Amplifier IC 1Channel Mono Class AB 400mW x 1 @ 100Ω 8-SO
Low Power Audio Amplifier
The 34119 is a low power audio amplifier integrated circuit intended for telephone applications, such as in speakerphones. It provides differential speaker outputs to maximize output swing at low supply voltages 2.0 V minimum. Coupling capacitors to the speaker are not required. Open loop gain is 80 dB, and the closed loop gain is set with two external resistors. A Chip Disable pin permits powering down and/or muting the input signal.
Features
• Wide Operating Supply Voltage Range 2.0 V to 16 V, Allows Telephone Line Powered Applications
• Low Quiescent Supply Current 2.7 mA Typ for Battery Powered Applications
• Chip Disable Input to Power Down the IC
• Low Power--Down Quiescent Current 65 µA Typ
• Drives a Wide Range of Speaker Loads 8.0 Ω and Up
• Output Power Exceeds 250 mW with 32 Ω Speaker
• Low Total Harmonic Distortion 0.5% Typ
• Gain Adjustable from <0 dB to >46 dB for Voice Band
• Requires Few External Components
• Pb-Free Packaging Designated by Suffix Code EF