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LC78856 Schematic ( PDF Datasheet ) - Sanyo Semicon Device

Teilenummer LC78856
Beschreibung Built-in Digital Filter D/A Converters for Digital Audio
Hersteller Sanyo Semicon Device
Logo Sanyo Semicon Device Logo 




Gesamt 8 Seiten
LC78856 Datasheet, Funktion
Ordering number : EN*5128A
Preliminaly
CMOS LSI
LC78856M, 78856V
Built-in Digital Filter D/A Converters
for Digital Audio
Overview
The LC78856M and LC78856V are ∑∆-type digital-audio
D/A converter circuits with built-in digital filters.
Features
• 8× oversampling digital filter
• Digital de-emphasis (supports fs = 44.1 kHz)
• Soft muting
• Double speed support
• Support for a 384fs system clock
• PWM outputs
• 5 V single-voltage power supply
• Si-gate CMOS process
Package Dimensions
unit: mm
3091A-MFP28
[LC78856M]
unit: mm
3191-SSOP30
[LC78856V]
SANYO: MFP28
SANYO: SSOP30
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Maximum input voltage
Maximum output voltage
Operating temperature
Storage temperature
Symbol
VDD max
VIN max
VOUT max
Topr
Tstg
Conditions
Ratings
–0.3 to +7.0
–0.3 to VDD + 0.3
–0.3 to VDD + 0.3
–30 to +75
–40 to +125
Unit
V
V
V
°C
°C
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
53096HA (OT)/62095HA (OT) No. 5128-1/8






LC78856 Datasheet, Funktion
LC78856M, 78856V
3. One-Bit D/A Converter Block
The 1-bit D/A converter accepts 8fs data input and outputs a 384fs 1-bit data stream.
LC78856M/V Inputs
1. Input Data Format
• Format 1 (MODE = high)
• Format 2 (MODE = low)
2. Control Signals (CNT1 to CNT3)
Symbol
CNT1
CNT2
CNT3
Function
Emphasis switching
Standard speed/double speed
Soft mute
L
Off
Standard speed
Off
H
On
Double speed
On
3. Initialization
The LC78856M and LC78856V requires initialization when power is first applied and when settings are changed.
The LC78856M and LC78856V is initialized by setting the RSTB pin low. The length of the low-level period must
extend 1 µs beyond the point where the XIN input is applied. When RSTB is low, all digital filter and noise shaper
internal data is set to 0, and the D/A converter outputs an analog 0.
No. 5128-6/8

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