|
|
PDF LA8638V Data sheet ( Hoja de datos )
| Número de pieza | LA8638V | |
| Descripción | Low-voltage Compander IC for Cordless Telephones | |
| Fabricantes | Sanyo | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LA8638V (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
Ordering number : EN5776
Monolithic Linear IC
LA8638V
Low-voltage Compander IC
for Cordless Telephones
Overview
The LA8638V provides dynamic range expansion, noise
suppression for enhancing the quality of audio signals in
cordless telephones and other communications systems.
This single chip provides the functions that make it ideal
for cordless telephones: a compressor with a logarithmic
compression ratio of 1/2, expander with a logarithmic
expansion ratio of 2, splatter filter, microphone amplifier,
BTL amplifier, waveform shaper for the receiving signal,
muting for both receiving and transmitting signals, and
standby operation.
Functions
• Transmitter circuits: compressor, microphone amplifier,
limiter (IDC), muting, output level changes to user-
specified levels, and splatter filter
• Receiver circuits: expander, buffer amplifier for filters,
muting, output level changes to user-specified levels,
and BTL amplifier
• Other circuits: waveform shaper for the receiving signal
and standby operation
speaker with a load of 2 kΩ
• Standby operation that conserves battery power during
intermittent reception by disabling all but the waveform
shaper for the receiving signal
• Built-in splatter filter with user-specified fc
• Low-voltage operation (1.8 V to 5.5 V)
Package Dimensions
unit: mm
3191-SSOP30
[LA8638V]
Features
• Full processing of baseband signals for both receiving
and transmitting signals
• Built-in BTL receiver amplifier for driving a ceramic
SANYO: SSOP30
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum power supply voltage
Maximum power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
Pd max
Topr
Tstg
Ta ≤ 75°C
Operating Conditions at Ta = 25°C
Parameter
Recommended power supply voltage
Operating power supply voltage range
Symbol
VCC
VCCop
Conditions
Conditions
Ratings
7.0
100
–20 to +75
–40 to +125
Unit
V
mW
°C
°C
Ratings
2.4
1.8 to 5.5
Unit
V
V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
40398RM (OT) No. 5776-1/16
1 page  
Test Circuit
LA8638V
No. 5776-5/16
5 Page 
Continued from preceding page.
Pin Number Pin Name Pin Voltage
Indeterminate
25 CMP-RCT (when there is
no signal)
LA8638V
Equivalent Circuit
26
MIC-OUT
VCC/2
27
MIC-IN2
VCC/2
28
MIC-IN1
VCC/2 power
supply
30
TX-LVL-ADj
VCC/2
I/O Characteristics
TX-OUT (pin 23)
Input level, VIN — dBV
Splatter Filter Frequency Characteristics
VCC = 2.4 V; resistance
Description
Full-wave rectifier output for compressor
block (AC smoothing)
Microphone amplifier output
Microphone amplifier negative input
Microphone amplifier positive input
Pin for setting amplification for transmitter
output level switching
Crosstalk Characteristics
RX → TX (pin 23)
TX-MUTE (pin 23)
TX → RX (pin 10)
RX-MUTE (pin 10)
Input level, VIN — dBV
Current Drain —. VCC
BTL on
BTL off
Frequency, f — kHz
Standby
Power supply voltage, VCC — V
No. 5776-11/16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet LA8638V.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LA8638NV | LA8638NV |  Sanyo Semicon Device |
| LA8638V | Low-voltage Compander IC for Cordless Telephones | Sanyo |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |