Ordering number : EN6075 Monolithic Linear IC LA8520M Audio Signal-Processing IC with I/O Switching Overview The LA8520M is an I/O switching audio signal-processing IC for use in facsimile units and telephones. It integrates a crosspoint switch, a BTL power amplifier, an electronic volume control, a microphone amplifier, and other functions on a single chip. Applications system: seven 4-dB steps, receiver amplifier system: two 3-dB steps) • Low switching noise, low crosstalk characteristics (crosspoint switch) Package Dimensions unit: mm 3129-MFP36SD Personal facsimile units and telephones [LA8520M] 19 36 1 18 0.25 15.3 2.25 2.5max • Built-in BTL power amplifier (8 to 32 Ω load): VCC = 5 V, RL = 16 Ω, Pomax = 250 mW • Electronic volume control (BTL power amplifier 0.65 Features 7.9 Crosspoint switch (equivalent to an 8 × 8 switch) BTL power amplifier Electronic volume control Serial interface 0.4 0.8 0.85 0.1 • • • • 9.2 10.5 Functions SANYO: MFP36SD Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Symbol Conditions VCC max Allowable power dissipation Pd max Ta ≤ 70°C (Mounted on a glass-epoxy board: 114.3 × 76.1 × 1.6 mm3) Ratings Unit 15 V 600 mW Operating temperature Topr –20 to +70 °C Storage temperature Tstg –40 to +150 °C Ratings Unit Operating Conditions at Ta = 25°C Parameter Recommended supply voltage Allowable operating supply voltage range Symbol VCC Conditions 5 V VCCop 4.5 to 7.5 V VCCopbtl 4.5 to 9.0 V Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein. SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 30499RM (OT) No. 6075-1/17 LA8520M Electrical Characteristics at Ta = 25°C, VCC = 5 V, fin = 1 kHz, RL = 10 kΩ Parameter Crosspoint switch voltage gain Symbol Gsw Conditions Ratings min typ –2.5 –0.5 1.5 dB THD = 1.5 % –13 –7 — dBV 15 60 µVrms 40 42 dB 0.6 1.5 % 2.5 7.5 µVrms Vimax Crosspoint switch output noise voltage Nosw 20 to 20 kHz Microphone amplifier/TR amplifier voltage gain Gmic Vin = –53 dBV 38 THDmc Vin = –53 dBV — Microphone amplifier/TR equivalent input noise voltage Nimc Microphone amplifier/TR maximum voltage gain Gmax Receiver amplifier/OGM amplifier voltage gain Receiver amplifier/OGM amplifier output distortion Operational amplifier voltage gain Operational amplifier output distortion DR amplifier output level Unit Vin = –13 dBV Crosspoint switch maximum input level Microphone amplifier/TR output distortion max Rg = 620 Ω, 20 to 20 kHz 40 — — dB 18 20 22 dB 0.4 1.5 % 10 12 dB 0.4 1.5 Gre Vin = –33 dBV THDre Vin = –33 dBV Gop Vin = –13 dBV 8 THDop Vin = –13 dBV — –16.1 –13.6 –11.1 0.5 1.5 % –2 +0.5 +3 dBV Vodr Vin = –23 dBV, IN(8), OUT(32), sw(10) on DR amplifier output distortion THDdr Vin = –23 dBV, IN(8), OUT(32), sw(10) on Handset amplifier output level Vohd Vin = –16 dBV, IN(9), OUT(34), sw(0B) on Handset amplifier output distortion THDhd — 0.55 1.5 % Handset amplifier attenuator level 1 Att1 address (51) 2.3 3 3.7 dB Handset amplifier attenuator level 2 Att2 address (52) 3.45 4.15 4.85 dB Handset amplifier attenuator level 3 Att3 address (53) 5.4 6.1 6.8 Electronic volume control output level Vin = –16 dBV, IN(9), OUT(34), sw(0B) on % dBV dB Voevr Vin = –20 dBV, IN(9), OUT(28), sw(2D) on –22.9 –20.4 –17.9 dBV Electronic volume control step size Wevr Vin = –20 dBV, IN(9), OUT(28), sw(2D) on 2.9 3.8 4.6 dB Electronic volume control output noise voltage Noevr 20 to 20 kHz, OUT(28) — 25 60 µVrms [BTL Power Amplifier] Gpwr Vin = –20 dBV, RL = 16 Ω 18.2 19.7 21.2 Total harmonic distortion THDpw Vin = –30 dBV, RL = 16 Ω — 0.7 1.5 % Maximum BTL output power Pomax THD = 10 %, RL = 16 Ω 250 400 — mW Ripple rejection ratio SVRR Rg = 620 Ω, frin = 100 Hz, Vrin = –20 dBV, RL = 16 Ω 40 50 — dB Output noise voltage Nopw Rg = 620 Ω, 20 to 20 kHz, RL = 16 Ω — 20 60 µVrms kHz Voltage gain dB [CPU Interface] Clock frequency Fck — — 500 Input signal high level VH 3 — — V Input signal low level VL — — 1.5 V [VREF and Current Drain] Internal reference voltage (the pin 10 voltage) Vref Quiescent current 1 Icco1 With the BTL power amplifier on and the crosspoint switch off Quiescent current 2 Icco2 With the BTL power amplifier off and the crosspoint switch off 2.1 2.25 2.4 V — 21 29 mA — 14.5 21 mA No. 6075-2/17 Block Diagram and Application Power supply LA8520M 8 to 32 Ω Units (resistance: Ω, capacitance: F) No. 6075-3/17 LA8520M Data generator Power supply Test Circuit Diagram Units (resistance: Ω, capacitance: F) No. 6075-4/17 LA8520M Serial Data Format A6 to A0: Setting for the crosspoint switch and control switch address (hexadecimal → binary) D: Controls the on/off state of the crosspoint switch and control switch. D = 1: Crosspoint switch on, BTL amplifier on D = 0: Crosspoint switch off, BTL amplifier off (The electronic volume control and attenuator can be set to either 0 or 1.) Address table Input - Output LINE HAND RF1 RF2 DOOR AUX EVR OP RE. — 07 0D 14 — 21 29 2F TR. 01 — 0E 15 1B 22 — 30 RF1 02 08 38 16 1C 23 2A 31 RF2 03 09 0F 39 1D 24 2B 32 DOOR — 0A 10 17 — 25 2C 33 AUX 04 0B 11 18 1E 26 2D 34 MIC 05 — 12 19 1F 27 — 35 OGM 06 0C 13 1A 20 28 2E 36 OP — — — — — — 37 — Other addresses Address Mode 00 All crosspoint switches off, default settings for the control switches 3F BTL power amplifier on (The default state is off.) 40 Electronic volume control 0 dB ← Default setting 41 Electronic volume control –4 dB 42 Electronic volume control –8 dB 43 Electronic volume control –12 dB 44 Electronic volume control –16 dB 45 Electronic volume control –20 dB 46 Electronic volume control –24 dB 47 Electronic volume control –28 dB 50 Handset amplifier attenuator 0 dB ← Default setting 51 Handset amplifier attenuator –3 dB 52 Handset amplifier attenuator –4 dB 53 Handset amplifier attenuator –6 dB No. 6075-5/17 LA8520M Serial Data Timing • fMAX (Maximum clock frequency) • tWL (Low-level clock pulse width) • tWH (High-level clock pulse width) • tCS (Chip enable setup time) • tCH (Chip enable hold time) • tDS (Data setup time) • tDH (Data hold time) • tWC (Chip enable pulse time) 500 kHz At least 1 µs At least 1 µs At least 1 µs At least 1 µs At least 1 µs At least 1 µs At least 1 µs No. 6075-6/17 LA8520M Usage Notes • Microphone and TR amplifiers Since these two amplifiers are designed for high gain (they support gains up to 40 dB), they cannot be used as buffer amplifiers. Use at lower gains may result in loss of phase margin and oscillation. Therefore, the gain must be set to a value of at least 6 dB. • Handset amplifier output (pin 34) A resistor (of at least 150 Ω) must be inserted in series if this output is connected directly to a dynamic speaker. • BTL power amplifier Input The phase compensation capacitor C4 is not required if the high-frequency noise reduction capacitor C1 is not used. Also, the phase compensation capacitors C2, C3, and C4 should be placed as close as possible to the IC pins, with C2 located the closest. • Inter-pin shorting This IC may be damaged or destroyed if power is applied with any pins shorted together. Therefore, when mounting this IC to a printed circuit board always check for pin shorting caused by stray solder or any other foreign material before applying power. • Load shorting This IC may be damaged or destroyed if it is operated for extended periods with the load shorted. Do not allow the load to be shorted. • The slightest fluctuations in operating conditions may cause the ratings to be exceeded if this IC is operated in the vicinity of the maximum ratings. Since this can lead to destruction of the device, applications must be designed with adequate margins with respect to the power-supply voltage and other parameters so that the maximum ratings are never exceeded. No. 6075-7/17 LA8520M Pin Functions Unit (resistance: Ω) Pin No. Pin Pin voltage (V) 1 RE-NF 2.25 RE amplifier noise filter 2 RE-OUT 2.25 RE amplifier output 14 OGM-OUT 2.25 OGM amplifier output 15 OGM-NF 2.25 OGM amplifier noise filter 16 OP-NF 2.25 Operational amplifier noise filter 17 OP-OUT 2.25 Operational amplifier output 3 TR-OUT 2.25 TR amplifier output 4 TR-NIN 2.25 TR amplifier minus input 5 TR-PIN 2.25 TR amplifier plus input 11 MIC-PIN 2.25 Microphone amplifier plus input 12 MIC-NIN 2.25 Microphone amplifier minus input 13 MIC-OUT 2.25 Microphone amplifier output 6 RF1-IN 2.25 RF1 input 7 RF2-IN 2.25 RF2 input 9 AUX-IN 2.25 Auxiliary input 8 DR-IN 2.25 Door phone input Notes Equivalent circuit Continued on next page. No. 6075-8/17 LA8520M Continued from preceding page. Unit (resistance: Ω) Pin No. Pin Pin voltage (V) 10 VREF 2.25 Internal circuit reference voltage (about 2.25 V) • Circuits other than the BTL amplifier operate using this potential as a reference. 19 CE VCC Chip enable input 20 DI VCC Data input 21 CL VCC Clock input 24 P-OUT1 0.44 VCC Notes Equivalent circuit BTL power amplifier output 1 To 27 pin 26 P-IN 0.44 VCC BTL power amplifier minus input 23 P-OUT2 0.44 VCC BTL power amplifier output 2 27 P-VREF 0.44 VCC BTL power amplifier reference voltage To 24 pin Continued on next page. No. 6075-9/17 LA8520M Continued from preceding page. Unit (resistance: Ω) Pin No. Pin Pin voltage (V) 28 VR-OUT 2.25 Electronic volume control output 29 AUX-OUT 2.25 Auxiliary output 30 DR-OUT 2.25 Door phone output 31 RF2-OUT 2.25 RF2 output 32 RF1-OUT 2.25 RF1 output 35 LN-OUT 2.25 Line output 33 HD-NF 2.25 Handset amplifier noise filter 34 HD-OUT 2.25 Handset amplifier output 18 GND — 22 P-VCC 5 V applied 25 P-GND — 36 VCC 5 V applied Notes Equivalent circuit Ground Power amplifier power supply Power amplifier ground Power supply No. 6075-10/17 Total harmonic distortion (%) Input level (dBV) Input level (dBV) Crosspoint Switch Input Dynamic Range Thermal Characteristics Input level (dBV) Electronic Volume Control Output Distortion Thermal Characteristics Output total harmonic distortion (%) Handset Amplifier Output Distortion Thermal Characteristics Output power (mW) VCC = 5 V Resistance: 16 Ω BTL Amplifier Output Distortion Thermal Characteristics LA8520M Total harmonic distortion (%) Total harmonic distortion (%) No. 6075-11/17 Quiescent current (mA) Step width (dB) Output power (mW) BTL Amplifier Output Distortion Characteristics Temperature (°C) Quiescent Current Thermal Characteristics Temperature (°C) ATT Attenuation Thermal Characteristics Temperature (°C) Electronic Volume Control Step Width Thermal Characteristics LA8520M Attenuation (dB) Total harmonic distortion (%) No. 6075-12/17 Total harmonic distortion (%) Total harmonic distortion (%) Output level (V rms) RE Amplifier Output Distortion Characteristics Output level (dBV) Door Phone Amplifier Output Distortion Characteristics Output level (V rms) Handset Amplifier Output Distortion Characteristics Output power (mW) BTL Amplifier Output Distortion Characteristics LA8520M Total harmonic distortion (%) Total harmonic distortion (%) No. 6075-13/17 Total harmonic distortion (%) Total harmonic distortion (%) Input level (dBV) Crosspoint Switch Input Dynamic Range Characteristics Output level (V rms) Microphone and TR Amplifiers Output Distortion Characteristics Output level (V rms) OGM Amplifier Output Distortion Characteristics Output level (V rms) Operational Amplifier Output Distortion Characteristics LA8520M Total harmonic distortion (%) Output total harmonic distortion (%) No. 6075-14/17 Crosstalk level (dBV) Step width (dB) Supply voltage (V) Crosstalk VCC Dependence Input level (dBV) Input Crosstalk Characteristics Supply voltage (V) Attenuator Attenuation VCC Dependence Supply voltage (V) Electronic Volume Control Step Width VCC Dependence LA8520M Attenuation (dB) Crosstalk level (dBV) No. 6075-15/17 Output noise (dBV) Ripple rejection ratio (dB) Supply voltage (V) Quiescent Current VCC Dependence Supply voltage (V) BTL Amplifier Output Noise VCC Dependence Supply voltage (V) Output Noise VCC Dependence Supply voltage (V) BTL Amplifier Ripple Rejection Ratio VCC Dependence LA8520M Output noise (dBV) Quiescent current (mA) No. 6075-16/17 LA8520M Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer’s products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer’s products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification” for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of March, 1999. Specifications and information herein are subject to change without notice. PS No. 6075-17/17