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Número de pieza | LC78856M | |
Descripción | Built-in Digital Filter D/A Converters for Digital Audio | |
Fabricantes | Sanyo Semicon Device | |
Logotipo | ||
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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
1 page LC78856M, 78856V
Pin Functions
SSOP
1
2
3
4
5
6
7
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
MFP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Symbol
RSTB
CNT1
CNT2
CNT3
BCLK
LRCK
DATA
MODE
CKO
XVDD
XIN
XOUT
XGND
DGND
MRO
TEST
AVDD4
OUTRA
AGND2
OUTRB
AVDD3
AVDD2
OUTLB
AGND1
OUTLA
AVDD1
MLO
DVDD
Operating Description
Function
Reset input (A low-level input resets the LSI internal circuits.)
Emphasis on/off switching input
Standard speed/double speed switching input
Soft mute input
Bit clock input
LR clock input
Digital audio data input
Input format setting
Clock output
Oscillator amplifier power supply
Oscillator amplifier input
Oscillator amplifier output
Oscillator amplifier ground
Digital system ground
Right channel mute signal output
Test pin (Must be tied low in normal operation.)
Analog system power supply
Right channel output A
Analog system ground
Right channel output B
Analog system power supply
Analog system power supply
Left channel output B
Analog system ground
Left channel output A
Analog system power supply
Left channel mute signal output
Digital system power supply
The LC78856M and LC78856V internal circuits can be roughly divided into the digital filter block and the 1-bit D/A
converter block.
[Digital Filter Block]
1. Standard Speed
The LC78856M and LC78856V implements 8× oversampling using three FIR filters: a 43rd-order filter, an 11th-
order filter, and a 3rd-order filter. A 1st-order IIR filter is used for de-emphasis.
2. Double Speed
Double-speed playback is used, for example, for dubbing CDs to audio tape at double speed. Here, the same
frequency is used for XIN, but BCLK, LRCK and DATA are input at twice the rates used in standard-speed
playback. After de-emphasis is applied with a 1st-order IIR filter, the signal is 4× oversampled using a 43rd-order
FIR filter and a 3rd-order FIR filter.
No. 5128-5/8
5 Page |
Páginas | Total 8 Páginas | |
PDF Descargar | [ Datasheet LC78856M.PDF ] |
Número de pieza | Descripción | Fabricantes |
LC78856 | Built-in Digital Filter D/A Converters for Digital Audio | Sanyo Semicon Device |
LC78856M | Built-in Digital Filter D/A Converters for Digital Audio | Sanyo Semicon Device |
LC78856V | Built-in Digital Filter D/A Converters for Digital Audio | Sanyo Semicon Device |
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