AMIS-14935 (former MSC-LX1792) offers patent pending, low-voltage, low

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AMIS-14935 (former MSC-LX1792) offers patent pending, low-voltage, low

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AMIS-14935 Audio Amplifier
AMIS-14935 (former MSC-LX1792) offers patent pending, low-voltage, low-power high efficiency amplifier driving high impedance speaker such hearing receiver headset. AMIS-14935 consists pre-amplifier followed fixed gain class amplifier. input resistor feedback resistor external AMIS-14935 making possible gain arbitrarily, approximately 40dB. feedback resistor also potentiometer facilitate volume control.
Operating Current: 120µA Typical Operating Voltage: 0.9V minimum Gain External Resistors output switch resistance settings: 5µVrms Input Referred Noise
Applications
Hearing applications High impedance speaker/transducer applications Important: most current data, consult Semiconductor's website: http://www.amis.com.
Product Highlight
Package Order Info
(°C): 10.15 Ceramic 14-Pin NQFP: Plastic MLPM 8-Pin Bare
Note hearing applications covered Knowles patents numbers 4,592,087 4,689,819: Semiconductor policy sell AMIS-14935 into hearing applications unless patent license exist between customer Knowles Corporation. Please contact AMIS assistance with this.
Semiconductor www.amis.com
AMIS-14935 Audio Amplifier
Absolute Maxium Ratings
Input Logic Supply Voltage (VDD) Operating Temperature Range -0.3V +3.0V 10°C 55°C
Note: Exceeding these ratings could cause damage device. voltages with respect Ground. Currents positive into, negative specified terminal.
Package
PACKAGE (Top View)
PACKAGE (Top View)
Settings
IMPSEL IMPSEL=VSS IMPSEL=VDD IMPSEL=Floating
Functional Name (Evaluation Samples)
OUTP OUTN PREOUT IMPSEL
Supply Voltage Ground Analog Audio Input Positive Output Voltage Negative Output Voltage Pre-Amplifier Output Output Resistance Select. Settings table below selections.
Semiconductor www.amis.com
AMIS-14935 Audio Amplifier
Recommended Operating Conditions
Parameter OPERATING CONDITIONS Supply Voltage Ground Symbol Test Conditions AMIS-14935 Units
Electrical Characteristics
Unless otherwise specified, following specifications apply over operating ambient temperature TA=25°C except where otherwise noted. Test conditions: VDD=1.3V, Parameter Switch Output Resistance Drive Switch Output Resistance Drive Switch Output Resistance High Drive Quiescent Current Drive Quiescent Current Drive Quiescent Current High Drive Bandwidth Frequency Bandwidth Frequency Output Switching Frequency Gain1 Power Supply Rejection Ratio Total Harmonic Distortion Symbol ROUT-L ROUT-M ROUT-HI IDDQL IDDQM IDDQH FMIN FMAX FCLK PSRR THD1 R1=50k, R2=500k R1=25k, R2=500k Input Reference R1=50k, R2=500k R1=50k, R2=500k, Vin=5mVrms, Fin=1kHz R1=25k, R2=500k, Vin=5mVrms, Fin=1kHz R1=50k, R2=500k, 100Hz-10kHz, weighting R1=25k, R2=500k, 100Hz-10kHz, weighting input signal R1=50k, R2=1000k, Fin=1kHz µVrms load Test Conditions VSS=0V, Circuit connected application schematic page Output loaded with 200Ohm series with 60mH.
AMIS-14935
Units
Input Referred Noise Output Clock Frequency Absolute Offset OutN-OutP
VN-20 FCLK VOFF-NP
Semiconductor www.amis.com
AMIS-14935 Audio Amplifier
Charts
Note: Graphs show distortion with load outputs.
Semiconductor www.amis.com
AMIS-14935 Audio Amplifier
Figure H-Bridge Impedance Supply Voltage (Lowest Impedance Setting).
Semiconductor www.amis.com
AMIS-14935 Audio Amplifier
Mechanicals MLPQ Package Outline
8-Pin Plastic MLP-Micro Exposed Millimeters 2.90 3.10 2.90 3.10 0.65 0.75 0.15 0.25 1.841 0.27 0.43 0.65 1.22 0.10 0.21 0.37 0.10 Inches 0.114 0.122 0.114 0.122 0.025 0.029 0.005 0.009 0.075 0.010 0.016 0.025 0.048 0.003 0.008 0.014 0.003
14-Pin Ceramic Millimeters 19.30 19.94 5.59 7.11 5.08 0.38 0.51 1.02 1.77 2.54 2.03 0.20 0.38 3.18 5.08 7.37 7.87 Inches 0.760 0.785 0.220 0.280 0.200 0.015 0.020 0.040 0.070 0.100 0.080 0.008 0.015 0.125 0.200 0.290 0.310
Note: Dimensions include mold flash protrusions; these shall exceed 0.155mm (.006") side. Lead dimension shall include solder coverage.
Semiconductor www.amis.com
AMIS-14935 Audio Amplifier
Mechanicals Bare
Millimeters 1.15 1.78 Inches 0.045 0.070
Note: Dimensions include mold flash protrusions; these shall exceed 0.155mm (.006") side. Lead dimension shall include solder coverage.
Semiconductor www.amis.com
AMIS-14935 Audio Amplifier
Using AMIS-14935 Hearing Assist Applications
Notes: When using volume control potentiometer, keep input resistor between 25kOhm 50kOhm optimum performance. Using lower than cause higher distortion using higher than cause output noise increase. Input coupling capacitor (C2) must present. Forms high pass filter together with resistor with approximate corner frequency 1/(2*3.14*R1*C2). facilitate supply filtering microphone.
AMIS-14935
suggested values indications only dependent microphone characteristic, quality supply supply rejection needed. Bypass capacitor needed. Shall kept (less than 1µF) since high value capacitance supply ground cause audible noise power down. IMPSel (Impedance select) should generally tied ground minimum switch impedance maximum drive capability.
Semiconductor www.amis.com
AMIS-14935 Audio Amplifier
Using AMIS-14935 Receiver Driver H-aid Ultra Power Audio System
Notes: optimum noise distortion performance input resistor recommended. Input coupling capacitor (C2) must present. Forms high pass filter together with resistor with approximate corner frequency 1/(2*3.14*R1*C2). Bypass capacitor (C1) needed dependent supply quality. This capacitor shall have
AMIS-14935
value (less than 1µF) since high value capacitance supply ground cause audible noise power down. other parts system requires higher capacitor value this capacitor placed battery side switch making total stored charge supply line small when system powered down (switch opened).
Semiconductor www.amis.com
Copyright 2003 Semiconductor rights reserved. Information furnished believed accurate reliable. However, Semiconductor assumes responsibility errors omissions information consequences such information. Semiconductor reserves right change information contained herein time without notice. This information provided without warranty kind, either expressed implied, including, limited implied warranties merchantability, fitness particular purpose, non-infringement intellectual property. title intellectual property rights including, without limitation, copyrights, trademarks, this information products owned Semiconductor, protected applicable laws. license under patent other intellectual property Semiconductor granted, implication, estoppel otherwise.

AMIS-14935 (former MSC-LX1792) offers patent pending, low-voltage, low

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