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| FAN3800 -- Mono / Stereo Audio Amplifier with Microphone Pre-Amplifier and EMU Interface October 2007 FAN3800 -- Mono / Stereo Audio Amplifier with Microphone Pre-Amplifier and EMU Interface Features Regulated positive supply Negative supply generator allows ground-centered output swing Dual speaker drivers with mono/stereo switch capability Capable of driving 16mW RMS per channel Complete external microphone interface Enhanced mini-USB bus detection and interface circuitry Manual and remote send-end switch interface Pop and click suppression Single 2.7V to 4.5V operation 2kV ESD (HBM) protection MLP 24-pin package Description The FAN3800 is a low-cost solution that integrates the many discrete parts currently used in stereo headset applications. It provides mono / stereo speaker drivers and a complete microphone interface. Additionally, the FAN3800 allows headset detection and identification through a 5-pin, enhanced mini-USB (EMU) bus. Manual and remote send-end switching is supported. The FAN3800 speaker drivers are designed to operate with a ground-centered output signal. This allows removal of large and expensive DC blocking capacitors. In addition, it allows interfacing with externally powered speakers. The speaker drivers are capable of driving up to 16mW RMS per channel. FAN3800 delivers a complete solution for interfacing an external microphone. The microphone interface provides a regulated, high PSRR supply, differential input sense to single-ended output driver amplifiers, and output muting. Gain is fixed at 36dB and can be attenuated externally with a resistor divider network. Send-end switching automatically routes the microphone output to the D+ output. When activated, the speakers switch from stereo to mono mode, both driven by the D- input. Pop and click noise is minimized during switching. Send-end information can be generated manually through an external switch or through the EMU bus interface. GND SW1 CP1 CP2 VS V+ Applications One-piece stereo/mono headset with microphone EMU to 3.5mm stereo headphone adapter EMU to 2.5 or 3.5 adapter for stereo headset with microphone ID MUTE BYPASS MIC+ MICMICSUP MICOUT SPKLIN SPKRIN MICSW GND D- CPOUT V- MLP-24 4x4mm SPKLOUT VS SPKROUT D+ Figure 1. FAN3800 Pin Out Ordering Information Part Number FAN3800MLP24X (c) 2007 Fairchild Semiconductor Corporation FAN3800 * Rev. 1.0.0 Pb-Free Package 24-Pin Molded Leadless Package (MLP) Packing Method Pack www.fairchildsemi.com FAN3800 -- Mono / Stereo Audio Amplifier with Microphone Pre-Amplifier and EMU Interface Block Diagram V+ CP1 CP2 CPOUT VVpos SPKLOUT VS 2.5V Suppl y Vpos MIC BIAS Neg Suppl y V0dB VS V- SPKLIN VBUS DD+ ID GND D+ R mono SPKRIN Vpos 0dB DD- Vpos SPKROUT VBYPASS R stereo MICBIAS MICSUP R mic ID Bias SEND/END N.O. SW 1 MICRid 102k Audi o Removal Filter 38dB DMIC+ Bias R mic MICOUT GND GND MICSW V+ MUTE R1 MUTE R2 Figure 2. Block Diagram (c) 2007 Fairchild Semiconductor Corporation FAN3800 * Rev. 1.0.0 www.fairchildsemi.com 2 FAN3800 -- Mono / Stereo Audio Amplifier with Microphone Pre-Amplifier and EMU Interface Pin Assignments GND SW1 CP1 CP2 VS V+ ID MUTE BYPASS MIC+ MICMICSUP SPKLIN MICOUT SPKRIN GND MICSW D- CPOUT V- MLP-24 4x4mm SPKLOUT VS SPKROUT D+ Figure 3. FAN3800 Pin Out Pin Definitions Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Name ID MUTE BYPASS MIC+ MICMICSUP MICOUT MICSW GND DSPKLIN SPKRIN D+ SPKROUT VS SPKLOUT VCPOUT CP2 CP1 VS GND V+ SW1 Type Input Input Output Input Input Output Output Input Input Input Input Input Input Output Output Input Output Input Output I/O I/O Input Input Output Input Identification pin Microphone mute control input Description External 100nF capacitor used for pop/click suppression High-side differential MIC input Low-side differential MIC input Microphone supply pin Microphone amplifier output tap for setting gain and shifting the DC bias level Output of microphone amplifier AC coupled to the D+ switch IC ground DC biased EMU bus input for send-end enable Left audio channel input Right audio channel input DC biased EMU bus input for identification Driven by MICOUT in mono mode Right speaker driver output Supply input from host device (3.3V typical) Left speaker driver output Filtered negative supply driven by CPOUT Charge pump unfiltered output Charge pump external cap pin Charge pump external cap pin Supply input from host device (3.3V typical) IC ground Positive power supply output for decoupling capacitor Send-end switch input (c) 2007 Fairchild Semiconductor Corporation FAN3800 * Rev. 1.0.0 www.fairchildsemi.com 3 FAN3800 -- Mono / Stereo Audio Amplifier with Microphone Pre-Amplifier and EMU Interface Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol VS VI/O TJ TSTG TL Supply Voltage Parameter Analog and Digital I/O Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10 seconds) Min. -0.3 GND-0.3 -40 Max. +6.0 VCC+0.3 +150 +80 +240 Unit V V C C C Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol VS TA ZLOAD VIN D+/DVBIAS D+/D JA Supply Voltage Temperature Range Parameter Min. 2.7 -20 14 0 1.25 Typ. 3.3 27 32 Max. 4.5 60 VS Unit V C V V C/W Speaker Load Impedance D+,D- ,SPKLIN,SPKRIN Input Range D- / D+ Bias Level in Audio Mode Package Thermal Resistance, JEDEC Standard Multi-Layer Boards, Still Air 1.39 40 1.53 (c) 2007 Fairchild Semiconductor Corporation FAN3800 * Rev. 1.0.0 www.fairchildsemi.com 4 FAN3800 -- Mono / Stereo Audio Amplifier with Microphone Pre-Amplifier and EMU Interface Electrical Characteristics TA = 25C, VS = 3.0V, audio inputs at -6dBV and AC coupled with 1F, speaker outputs DC coupled into 16 loads referenced to 1kHz, ID = VIL, CBYPASS = 100nF, unless otherwise noted. Symbol IS tSUPPLY Parameter Supply Current(1) Power-Up Stabilization Time Power Supply Noise Rejection at MIC Output No load Conditions Min. Typ. 5.6 Max. 6.0 10 Units mA ms Power Supply Characteristics V+, V- within 90% of final value 217Hz 12% duty cycle square wave 2.7V to 3.2V at VS Output (D+) in Vrms as single wideband measurement within psophometric filter 217Hz 12% duty cycle square wave 2.7V to 3.2V at VS Output (D+) in Vrms as single wideband noise measurement within 20Hz - 20kHz, A weighted Supply current = 1mA During detection, mono mode (external 150k 30% D+ pull-up to 2.775V 3% During detection, stereo mode (external 150k 30% D+ pull-up to 2.775V 3% During detection (external 4M pull-down to GND) Multi-function button disabled Multi-function button enabled Send-end active, 102k pull-down resistor Send -end Active, 102k pull-down resistor Voltage divider from phone and external 102k pull-down resistors Voltage divider from phone and external 102k pull-down resistors Send-end inactive D-, mono mode; D-, stereo mode D+, stereo mode D+, mono mode VS = 0 Mono mode Stereo or mono mode 200 300 1 33 33 200 1.4 1.0 100 1.0 -80 dBV(a) PSRRMIC -80 dBV(p) PSRRSPKR Power Supply Noise Rejection at Speaker Output Microphone Bias Supply(1) VMIC 2.0 2.1 2.2 V D+/D- Line Characteristics VOH D+ VOL D+ VOL DVEN LOW VEN HIGH Output High Voltage D+(1) Output Low Voltage D+ (1) Output Low Voltage D-(1) D- Voltage to Disable MFB(1) D- Voltage to Enable MFB(1) 2.0 0.8 0.8 0.5 V V V V V ID Line Characteristics VOH VOL VIH VIL IIN ZiDZiD+ ZOD+ Zi MICSUP ZL D+ ZL SPKR Mute Input VIH VIL Input High Voltage(1) Input Low Voltage(1) Mute-line floating 1.5 0.8 V V Output High Voltage(1) Output Low Voltage(1) Input High Voltage - Stereo Mode(1) Input Low Voltage - Mono Mode(1) Input Leakage Current(2) D- Input Impedance(1) D+ Input Impedance(1) D+ Output Impedance(2) MICSUP input Impedance(2) Maximum Load Impedance on D+(2) Maximum Load Impedance on SPKROUT & SPKLOUT(2) 0.8 0.2 V V V V nA k k k pF nF Input/Output Impedance Continued on the following page... (c) 2007 Fairchild Semiconductor Corporation FAN3800 * Rev. 1.0.0 www.fairchildsemi.com 5 FAN3800 -- Mono / Stereo Audio Amplifier with Microphone Pre-Amplifier and EMU Interface Electrical Characteristics (Continued) TA = 25C, VS = 3.0V, audio inputs at -6dBV and AC coupled with 1F, speaker outputs DC coupled into 16 loads referenced to 1kHz, ID = VIL, CBYPASS = 100nF, unless otherwise noted. Symbol AMIC Gain(1) Parameter Conditions 1kHz, no divider on MICOUT, Input = -58dBV Input = -58dBV, no divider on MICOUT, referenced to 1kHz Input = -44dBV at 1kHz Microphone output resistors, R1 = R2 = 800 Input loaded with 2 through 1F cap. Psophometric weighted output Input = -26dBV at 1kHz, 16 loads (1) Min. 37.5 -3.0 Typ. 38.0 Max. 38.5 0.5 Units dB dB Microphone Pre-Amplifier 20Hz to 100Hz FRMIC Frequency Response(1) 100Hz to 20kHz -0.5 0.5 -65 -80 dB SINAD dBVp THDMIC NOISEMIC Distortion(2) Idle Noise(2) Speaker Amplifier ASPK Gain(1) -0.5 -1.5 -0.5 0 0.5 1.5 0.5 -65 -75 -65 -65 0.5 -65 dB SINAD dBV(A) dB dB dB dB dB dB 20Hz to 15kHz referenced to 1kHz 15kHz to 20kHz referenced to 1kHz FRSPK Frequency Response Input = -26dBV THDSPK NOISESPK XTLKMS XTLKSM AMATCH XTLKSPK Distortion(2) Idle Noise(2) Microphone to Speaker Crosstalk(2) Speaker to Microphone Crosstalk(2) Matching of L & R Channels(2) Crosstalk Between L & R Channel(2) Input = -6dBV at 1kHz No input Input at microphone to give D+ = -6dBV, measure at speaker output D- = -6dBV, measure at D+ Input = -26dBV, 20Hz to 20kHz Input = -26dBV Notes: 1. 100% tested at TA = 25C. 2. Guaranteed by design and characterization. 3. Microphone path noise measured using psophometric weighting function (see Figure 4). 4. Speaker path noise measured using A-type weighting. (c) 2007 Fairchild Semiconductor Corporation FAN3800 * Rev. 1.0.0 www.fairchildsemi.com 6 FAN3800 -- Mono / Stereo Audio Amplifier with Microphone Pre-Amplifier and EMU Interface Typical Characteristics MIC Path Psophometric Weighting 4 -6 -16 -26 Relative Gain (dB) -36 -46 -56 -66 -76 -86 -96 10 100 Frequency (Hz) Hi Limit Gain (dB) Low Limit 1000 10000 Figure 4. Microphone Path Psophometric Weighting Function (c) 2007 Fairchild Semiconductor Corporation FAN3800 * Rev. 1.0.0 www.fairchildsemi.com 7 FAN3800 -- Mono / Stereo Audio Amplifier with Microphone Pre-Amplifier and EMU Interface Physical Dimensions Figure 5. 24-Pin Molded Leadless Package (MLP) (c) 2007 Fairchild Semiconductor Corporation FAN3800 * Rev. 1.0.0 www.fairchildsemi.com 8 www.fairchildsemi.com FAN3800 -- Mono / Stereo Audio Amplifier with Microphone Pre-Amplifier and EMU Interface (c) 2007 Fairchild Semiconductor Corporation FAN3800 * Rev. 1.0.0 9 |
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