LX1790 I N T E G R A T E D Low Voltage, Low Power, AudioMite™ Class-D Audio Amplifier P R O D U C T S P RODUCTION D ATA S HEET KEY FEATURES The MSC-LX1790 also comes with The MSC-LX1790 offers a patent pending, low voltage, low power, and three output switch resistance settings to high efficiency amplifier for driving a accommodate different receivers. It is hearing aid receiver. It comes with three delivered in bare die form. programmable gain settings of 14dB, 20dB and 26dB. ! Low Operating Current: 100µA Typical ! Low Operating Voltage: 0.9V minimum ! 3 Gain Settings: 14, 20 & 26dB ! 3 Output Switch Resistance Settings: 48, 24 & 16 Ω 2 ! Small Form Factor: 2.03mm Bare die APPLICATIONS W W W. Microsemi .COM DESCRIPTION ! Hearing Aid IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com PRODUCT HIGHLIGHT C LOCK D IN Σ P RE A MP H BRIDGE CMP S PEAKER Simplified Block Diagram LX1790 PACKAGE ORDER INFO TJ (°°C) 10 to 55 Copyright 2001 Rev. 1.0,2002-05-08 J Cermic Dip 14 -Pin LX1790CJ Plastic Dip 8-Pin LX1790CLM LM BD Microsemi INTEGRATED PRODUCTS 5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541 Bare Die 7-Pin LX1790CBD Page 1 LX1790 I N T E G R A T E D Low Voltage, Low Power, AudioMite™ Class-D Audio Amplifier P R O D U C T S P RODUCTION D ATA S HEET PACKAGE PIN OUT Input Logic Supply Voltage (VDD) .............................................................. -0.3V to +3.0V Operating Temperature Range........................................................................ 10°C to 55°C IMP SEL (100,952) V SS (1590,818) OUT N (1590,609) Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal. OUT P IN (1590,349) (100,279) V DD GAIN SEL (1590,105) (100,100) (0,0) Pad Locations Are (X MIN , Y MIN ) and are in µm BD (Bottom View) VSS 1 8 VDD OUTN 2 7 OUTP IMPSEL 3 6 GAINSEL 5 IN 4 W W W. Microsemi .COM ABSOLUTE MAXIMUM RATINGS LM PACKAGE (Top View) OUTN 1 14 OUTP VSS 2 13 VDD 3 12 4 11 5 10 6 9 GAINSEL 7 8 IN IMPSEL J PACKAGE (Top View) FUNCTIONAL PIN DESCRIPTION PIN NAME PIN NO 8 PIN LM PIN NO 14 PIN J VDD 8 13 VSS 1 2 Ground IN 5 8 Analog Audio Input OUTP 7 14 Positive Output Voltage DESCRIPTION Supply Voltage 2 1 Negative Output Voltage 6 9 Gain Select. See Settings table below for selections. IMPSEL 3 6 Output Resistance Select. See Settings table below for selections. PACKAGE DATA OUTN GAINSEL SETTINGS Copyright 2001 Rev. 1.0,2002-05-08 PIN GAINSEL=VDD IMPSEL=VSS GAINSEL=VSS IMPSEL=VDD GAINSEL=Floating IMPSEL=Floating GAINSEL 14dB 20dB 26dB IMPSEL 16Ω 24Ω 48Ω Microsemi INTEGRATED PRODUCTS 5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541 Page 2 LX1790 I N T E G R A T E D Low Voltage, Low Power, AudioMite™ Class-D Audio Amplifier P R O D U C T S P RODUCTION D ATA S HEET Parameter ! Symbol Test Conditions Min LX1790 Typ Max Units OPERATING CONDITIONS Supply Voltage VDD Ground VSS 0.9 1.5 0 V V ELECTRICAL CHARACTERISTICS Unless otherwise specified, the following specifications apply over the operating ambient temperature TA=25°C except where otherwise noted. Test conditions: VDD=1.3V, VSS=0V, RLOAD=200Ω in Series with 60mH Parameter Symbol Switch Output Resistance @ Low Drive Switch Output Resistance @ Med Drive Switch Output Resistance @ High Drive Test Conditions Min LX1790 Typ ROUT-L 48 ROUT-M 24 ROUT-HI 16 Quiescent Current @ Low Drive IDDQL 100 Quiescent Current @ Med Drive IDDQM 110 Quiescent Current @ High Drive IDDQH 120 3dB Bandwidth – mid Frequency FMIN 3dB Bandwidth – max Frequency FMAX Output Switching Frequency 40 All gain settings Max Units Ω 19 µA 100 20 FCLK Hz KHz 200 KHz Gain Setting 1 A1 VIN = 100mVRMS @ 1KHz 12 14 16 dB Gain Setting 2 A2 VIN = 50mVRMS @ 1KHz 18 20 22 dB Gain Setting 3 A3 VIN = 25mVRMS @ 1KHz 24 26 28 dB Power Supply Rejection Ratio Total Harmonic Distortion @ Gain = 14dB Total Harmonic Distortion @ Gain = 20dB Total Harmonic Distortion @ Gain = 26bd PSRR Input Reference 45 dB THD14 VIN = 50mVRMS @ 1KHz 0.3 % THD20 VIN = 25mVRMS @ 1KHz 0.3 % THD26 VIN=12mVRMS @ 1KHz 0.3 % VN-14 Gain = 14dB, 100Hz – 10Khz, A-Weighted 20 µV Input Referred Noise VN-20 Gain = 20dB, 100Hz – 10Khz, A-weighted 10 µV Input Referred Noise VN-26 Gain = 26dB, 100Hz – 10Khz, A-weighted 6 µV Input Resistance RIN-14 Gain = 14dB 120 KΩ Input Resistance RIN-20 Gain = 20dB 83 KΩ Input Resistance RIN-26 Gain = 26dB Output clock frequency FCLK Copyright 2001 Rev. 1.0,2002-05-08 VOFF-NP No input signal Microsemi INTEGRATED PRODUCTS 5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541 KΩ 53 140 200 300 KHz -5 0 5 mV Page 3 ELECTRICALS Input Referred Noise DC Offset OutN-OutP W W W. Microsemi .COM RECOMMENDED OPERATING CONDITIONS LX1790 I N T E G R A T E D Low Voltage, Low Power, AudioMite™ Class-D Audio Amplifier P R O D U C T S P RODUCTION D ATA S HEET W W W. Microsemi .COM CHARTS THD vs input level 4 3.5 THD [%] 3 2.5 2 1.5 1 0.5 0 0 20 40 60 80 100 Input [mVrms] Figure 1 – THD vs. Input Level FIN = 1kHz, Gain = 20dB (Note: clip level at 90mVrms) LX1790 H-bridge on impedance 30 Ron [Ohm] 25 20 15 10 5 CHARTS 0 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 Supply voltage Figure 2 – H-Bridge Impedance vs. Supply Voltage (Lowest Impedance Setting) Copyright 2001 Rev. 1.0,2002-05-08 Microsemi INTEGRATED PRODUCTS 5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541 Page 4 LX1790 I N T E G R A T E D Low Voltage, Low Power, AudioMite™ Class-D Audio Amplifier P R O D U C T S P RODUCTION D ATA S HEET BD 7-Pin Bare Die Dim 1.78m m X Y Z (100,952) MILLIMETERS MIN MAX 1.15 1.78 0.190 0.216 INCHES MIN MAX 0.045 0.070 0.0075 0.0085 (1590,818) W W W. Microsemi .COM MECHANICALS 1.15m m (1590,609) (1590,349) (100,279) (1590,105) (100,100) (0,0) J Pad Locations Are (X M IN , Y M IN ) and are in µm 14-Pin Ceramic Dip A Dim 1 L C F K H G D J M INCHES MIN MAX 0.760 0.785 0.220 0.280 0.200 0.015 0.020 0.040 0.070 0.100 BSC 0.080 0.008 0.015 0.125 0.200 0.290 0.310 15° MECHANICALS A B C D F G H J K L M B MILLIMETERS MIN MAX 19.30 19.94 5.59 7.11 5.08 0.38 0.51 1.02 1.77 2.54 BSC 2.03 0.20 0.38 3.17 5.08 7.37 7.87 15° Note: 1. Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006”) on any side. Lead dimension shall not include solder coverage. Copyright 2001 Rev. 1.0,2002-05-08 Microsemi INTEGRATED PRODUCTS 5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541 Page 5 LX1790 I N T E G R A T E D Low Voltage, Low Power, AudioMite™ Class-D Audio Amplifier P R O D U C T S P RODUCTION D ATA S HEET LM 8-Pin Plastic MLP-Micro Exposed Pad Dim A K J E B H I C D G F Internally Connected together, but isolated from all other terminals A B C D E F G H I J K MILLIMETERS MIN MAX 2.90 3.10 2.90 3.10 0.65 0.75 0.15 0.25 1.841 BSC 0.27 0.43 0.65 BSC 1.22 BSC 0 0.10 0.21 0.37 0 0.10 INCHES MIN MAX 0.114 0.122 0.114 0.122 0.025 0.029 0.005 0.009 0.075 BSC 0.010 0.016 0.025 BSC 0.048 BSC 0 0.003 0.008 0.014 0 0.003 W W W. Microsemi .COM MECHANICALS Note: 1. Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006”) on any side. Lead dimension shall not include solder coverage. MECHANICALS Copyright 2001 Rev. 1.0,2002-05-08 Microsemi INTEGRATED PRODUCTS 5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541 Page 6 LX1790 I N T E G R A T E D P R O D U C T S Low Voltage, Low Power, AudioMite™ Class-D Audio Amplifier P RODUCTION D ATA S HEET W W W. Microsemi .COM NOTES NOTES PRODUCTION DATA – Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not necessarily include testing of all parameters. Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright 2001 Rev. 1.0,2002-05-08 Microsemi INTEGRATED PRODUCTS 5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541 Page 7