LA74308LP_08 SANYO [Sanyo Semicon Device], LA74308LP_08 Datasheet

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LA74308LP_08

Manufacturer Part Number
LA74308LP_08
Description
Audio Interface for DSC
Manufacturer
SANYO [Sanyo Semicon Device]
Datasheet
1.LA74308LP_08.pdf (16 pages)
Ordering number : ENA0898A
LA74308LP
Overview
Features
Specifications
Maximum Ratings at Ta=25°C
* Printed circuit board mounting condition (40mm × 50mm × 0.8mm: glass epoxy) 2S2P (Four layers printed circuit board)
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
The LA74308LP is a SPEAKER AMP and MIC AMP built-in audio interface for DSC.
It incorporates an 8/16kHz trap and supports CODECs with a sampling rate of 8kHz or 16kHz.
• Three-wire type SERIAL communication
• MIC AMP
• MIC power supply incorporated (with built-in pull-up resistor)
• ALC AMP
• 4th order LPF + trap (compatible with REC/PB changeover, trap frequency selectable from 8kHz and 16kHz)
• SPEAKER AMP (The BEEP signal can be mixed.)
• Electronic VOLUME (controlled by serial communication)
• LINE output (with SERIAL MUTE and MUTE transistor)
• STANDBY control
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. 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
device, the customer should always evaluate and test devices mounted in the customer
equipment.
Parameter
'
s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
V CC max
Pd max
Topr
Tstg
Symbol
Monolithic Linear IC
Audio Interface for DSC
Ta≤85°C *
Conditions
51408 TI IM / 82907 TI IM 20060927-S00005 No.A0898-1/16
'
s products or
Ratings
-55 to +150
-10 to +85
500
5.0
Unit
mW
°C
°C
V

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LA74308LP_08 Summary of contents

Page 1

Ordering number : ENA0898A LA74308LP Overview The LA74308LP is a SPEAKER AMP and MIC AMP built-in audio interface for DSC. It incorporates an 8/16kHz trap and supports CODECs with a sampling rate of 8kHz or 16kHz. Features • Three-wire type ...

Page 2

Operating Conditions 25°C Parameter Recommended operating voltage Allowable operating voltage range Electrical Characteristics at Ta=25° A=3.0V SP=3.3V, f=1kHz, with the VREF capacitance charging circuit in the OFF MODE Parameter Symbol Circuit current V ...

Page 3

Continued from preceding page. Parameter Symbol MIC output system MIC voltage gain VGMIC MIC output distortion HDMIC MIC output noise voltage VNOMIC MIC IN max input level VINMMX MIC V CC output voltage VMIC Control system Serial CLOCK frequency FCLK ...

Page 4

Description of the Content of Serial Communication DATA No. LSB 0 LINE MUTE Tr. 1 VREF capacitance charging circuit SW 2 MIC AMP POWER SW 3 ALC AMP POWER SW 4 REC/PB changeover SW 5 LPF characteristics (TRAP) changeover SW ...

Page 5

POWER ON RESET Condition (SERIAL communication) H Power Supply L H STANDBY control (Pin POWER ON PULSE (Signal inside IC C.S. (Pin Data (Pin Clock (Pin ...

Page 6

BIAS MODE Canceling State (SERIAL communication) H Power Supply L H STANDBY control (Pin POWER ON PULSE (Signal inside IC C.S. (Pin 6) L Data15=0 H Data (Pin Clock (Pin 7) L ...

Page 7

Electrical Characteristics Measurement Method at Ta=25° A=3.0V SP=3.3V, f=1kHz with the VREF capacitance charging circuit in the OFF MODE LA74308LP No.A0898-7/16 ...

Page 8

LA74308LP No.A0898-8/16 ...

Page 9

LA74308LP No.A0898-9/16 ...

Page 10

Description of Pin Functions Pin No. 1 Speaker input 2 EVR output 3 STANDBY control 4 LINE output 5 LINE MUTE Tr. output 6 C.S. input 7 CLOCK input 8 DATA input 9 GND 10 PB input ...

Page 11

Block Diagram T17 600Ω A SW17 ∼ B 0.01μF 6.2kΩ SW18 6.2kΩ 2.2kΩ 19 VREF 20 + 4.7μF T21 21 SPK8Ω 1μF T22 23 3.3V T23 24 SPK GND LA74308LP T16 MIC OUT A MIC ...

Page 12

LPF Characteristics 2.00E+01 0.00E+00 -2.00E+01 -4.00E+01 -6.00E+01 -8.00E+01 -1.00E+02 1.00E+02 EVR Characteristics 0 -10 -20 -30 -40 -50 -60 -70 -80 - SPK Output Level & Distortion Rate LA74308LP SPK output & THD characteristics (PB IN Max input ...

Page 13

LA74308LP Input/output Pattern Table PIN Pin Name DC voltage 1.27V At PB reference input Output level = -9dBV 23 SPK OUT- 1.27V At PB reference input Output level = -9dBV 2 EVR OUT 1.5V 3 STANDBY L ...

Page 14

Continued from preceding page. PIN Pin Name DC voltage 9 GND 1.5V Reference input level REC OUT 1.5V Reference input level 13 ALC DET 14 ALC IN (REC) 1.5V Reference input ...

Page 15

Continued from preceding page. PIN Pin Name DC voltage 16 MIC OUT (REC) 1.5V LPF OUT (PB) 17 MIC IN 1.5V Reference input level Max input level 18 MIC V CC 2.30V 19 VREFL 2.30V 20 SP GND 0V 24 ...

Page 16

Application Circuit MIC IN 0.01μF 18 2.2kΩ 4.7μ MIC V CC VREF 20 SPK 8Ω charging circuit 3.3V 1μ 0.1μF BEEP IN SANYO Semiconductor Co.,Ltd. assumes no responsibility for ...

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