AMIS AMIS-14935
The AMIS-14935 (former MSC-LX1792) offers a patent pending, low-voltage, low-power and high efficiency amplifier for driving a high impedance speaker such as a hearing aid receiver or a headset. The AMIS-14935 consists of a pre-amplifier followed by a fixed gain class D amplifier. The input resistor and feedback resistor is external in the AMIS-14935 making it possible to set the gain arbitrarily, up to approximately 40dB.DESCRIPTION
The feedback resistor can also be potentiometer to facilitate volume control. KeyFEATURES
● Low Operating Current: 120µA Typical● Low Operating Voltage: 0.9V minimum
● Gain Set by External Resistors
● 3 output switch resistance settings: 48, 24 & 16Ω
● 5µVrms Input Referred Noise
APPLICATIONS
● Hearing aid applications● High impedance speaker/transducer applications Important: For the most current data, consult AMI Semiconductor’s website: Product Highlight Package Order Info TJ (°C): 10…15 J: Ceramic Dip 14-Pin NQFP: Plastic MLPM 8-Pin BD: Bare Die Note for hearing aid applications are covered by Knowles patents numbers US 4,592,087 & 4,689,819: AMI Semiconductor policy is not to sell the AMIS-14935 into hearing aid applications unless a patent license exist between customer and Knowles Corporation. Please contact AMIS for assistance with this. AMI Semiconductor 1 AMIS-14935 Audio Amplifier Absolute Maxium Ratings Input Logic Supply Voltage (VDD) Operating Temperature Range -0.3V to +3.0V 10°C to 55°C Note: Exceeding these ratings could cause damage to the device.