PDF AN6175K Data sheet ( Hoja de datos )

Número de pieza	AN6175K
Descripción	Hands-free Speech Network IC
Fabricantes	Panasonic Semiconductor
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No Preview Available ! ICs for Telephone AN6175K Hands-free Speech Network IC s Overview The AN6175K is a speech network IC incorporating a hands-free function. It provides for a high-quality hands- free telephone or handset telephone. The hands-free telephone function(HF)includes : • MIC amplifier capable of mute and gain control • Background noise monitoring • Voice switching attenuation control • Symmetrical transmitter/receiver attenuators • Dynamic loudspeaker amplifier The handset telephone function(HF)includes: • Automatic pad capable of detecting transmission distance • MIC amplifier • Receiver preamplifier • Dynamic loudspeaker amplifier s Features • Provides all the functions required of a hands-free or handset telephone. • Can operate on line voltage (requiring no external power supply). • Consumes minimal current. • Provides for an external filter ensuring a wide range of howling suppression. • Mute mode for hands-free operation • Background noise monitoring to improve transmission quality • 100 mW loudspeaker output (at IL=100mA) • Built-in power supply and low-voltage regulator • DIP package with 42-pins or QFH package with 44-pins AN6175K 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 13.7±0.3 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 4.76±0.25 Unit : mm 0.96±0.25 3.3±0.25 3 ∼ 15° 15.3±0.25 0.3+−00.1.05 SDIP package with 42 pins (SDIP042-P-0600A) 1 1 page ICs for Telephone s Electrical Characteristics (cont.) (Ta=25±2°C) Parameter HF transmitter Trans. gain (1) Trans. gain (2) Trans. noise Trans. att. gain (1) Trans. att. gain range (1) Trans. att. idling gain (1) Trans. att. gain (2) Trans. att. gain range (2) Trans. att. idling gain (2) HF receiver Rec.gain (1) Rec. gain (2) Rec. distortion Symbol Condition GFS1 GFS2 NFS GTA MAX1 GTA MIN1 GTA IDL1 GTA MAX2 GTA MIN2 GTA IDL2 Vin4= –65dBm IL=20mA Vin4= –65dBm IL=120mA Rg=2kΩ, IL=20mA with a CCITT filter Vin4= –60dBm IL=20mA Vin4= –60dBm IL=20mA Vin4= –60dBm IL=20mA Vin4= –60dBm IL=20mA Vin4= –60dBm IL=20mA Vin4= –60dBm IL=20mA Vin3= –50dBm GFR1 IL=20mA Vin3= –50dBm GFR2 IL=120mA Vin3= –50dBm TSP IL=20mA Rec. max output (1) VSP1 TSP=5%, IL=20mA Rec. max output (2) Rec. noise Rec. att. gain (1) Rec. att. gain range (1) Rec. att. idling gain (1) Rec. att. gain (2) Rec. att. gain range (2) Rec. att. idling gain (2) Rec. att. volume characteristics VSP2 NFR GRA MAX1 GRA MIN1 GRA IDL1 GRA MAX2 GRA MIN2 GRA IDL2 GRA VRM TSP=5%, IL=120mA Rg=2kΩ, IL=20mA with a CCITT filter Vin3= – 40dBm IL=20mA Vin3= – 40dBm IL=20mA Vin3= – 40dBm IL=20mA Vin3= – 40dBm IL=120mA Vin3= – 40dBm IL=120mA Vin3= – 40dBm IL=120mA Vin3= – 40dBm IL=20mA AN6175K min typ max Unit 57 60 63 dB 63 66 69 dB –58 dBm 28 31 34 dB 45 48 dB 1 4 7 dB 33 36 39 dB 47 50 dB 3 6 9 dB 34 37 40 dB 40 43 46 dB 1.5 5.0 % –10 –7 dBm 47 dBm –60 dBm 9 12 15 dB 49 52 dB –15 –12 –9 dB 14 17 20 dB 53 56 dB –13 –10 –7 dB –4 –2 0 dB s Electrical Characteristics (Design Values for Reference) (Ta=25±2°C) Parameter Symbol Condition HS power supply HS mode internal reference voltage (1) HS mode internal reference voltage (2) HS mode internal reference voltage (3) HS mode AC impedance Vrs VSPS VBGS ZACS Pin31 high, Pin32 high, IL=20mA Pin31 high, Pin32 high, IL=20mA Pin31 high, Pin32 high, IL=20mA Pin31 high, Pin32 high, IL=20mA Design value 1.0 2.0 1.17 610 Unit V V V Ω 5 5 Page ICs for Telephone AN6175K MIC Preamplifier Gain/Frequency Characteristics Adjustment The external components, R12, R13, C6, and C45, determine the MIC preamplifier gain/frequency characteristics in the HS mode as shown in Fig. 2—2. R12 and C6 form a low-pass filter, and R13 and C45 form a high-pass filter. AN6175K Vr To APC + – 3 MAI VCC1 R14 R13 C45 R12 C6 4 MAO Referring to Fig.2—2, the MIC preamplifier gain, G(HSMIC), is cal- culated as follows : G (HSMIC) = 20log {1/ (2π f C6)}// R12 {1/ (2π f C45)} + R13 (dB) In the standard condition, R12=R13=10 kΩ, C6=102 pF, and C45 = 0.1µF. ECM Fig.2—2 MIC Preamplifier The HS mode transmitter frequency characteristics are calculated as follows : • High-band cutoff frequency, fHC=1/(2πC6 · R12) • Low-band cutoff frequency, fLC=1/(2πC45 · R13) Referring to the above calculations : • For the low-pass filter, the larger the C6 capacitance, the lower the cutoff frequency, or the smaller the capacitance, the higher the frequency. • For the high-pass filter, the larger the C45 capacitance, the lower the cutoff frequency, or the smaller the capacitance, the higher the frequency. See Fig.2—3. Larger C45 Smaller C45 Larger C6 Smaller C6 Standard C45 Standard C6 300 1k 4k Input Frequency (Hz) Fig.2—3 HS Mode Transmitter Frequency Characteristics 11 11 Page

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