SANYO LC78855KM Datasheet
Ordering number : EN*4999
93098HA (OT) / 83194TH (OT) No. 4999-1/9
LC78855KM
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Digital Audio D/A Converter
with Built-in Digital Filters
CMOS LSI
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.
Overview
The LC78855KM is a Σ∆ D/A converter with built-in
digital filters for use in digital audio products.
Features
•8×oversampling digital filters
• Digital de-emphasis (for Fs = 44.1 kHz)
• Digital attenuation (with serial input)
• Soft muting (with parallel inputs)
• Supports double-speed playback.
• Supports a 384 fs system clock.
• PWM output
• Single 5 V power supply
• Si gate CMOS process
Package Dimensions
unit: mm
3091-MFP28
Preliminary
Specifications
Absolute Maximum Ratings at Ta = 25°C
Allowable Operating Ranges at Ta = –30 to +75°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
DD
max –0.3 to +7.0 V
Maximum input voltage V
IN
max –0.3 to VDD+ 0.3 V
Maximum output voltage V
OUT
max –0.3 to VDD+ 0.3 V
Operating temperature Topr –30 to +75 °C
Storage temperature Tstg –40 to +125 °C
Parameter Symbol Conditions min typ max Unit
Supply voltage V
DD
4.5 5.0 5.5 V
Input voltage range V
IN
0V
DD
V
[LC78855KM]
SANYO: MFP28
DC Characteristics at Ta = –30 to +75°C, VDD= 4.5 to 5.5 V, VSS= 0 V
AC Characteristics at Ta = –30 to +75°C, VDD= 4.5 to 5.5 V, VSS= 0 V
Timing Diagrams
No. 4999-2/9
LC78855KM
Parameter Symbol Conditions
Ratings
Unit
min typ max
Input high level voltage (1) V
IH
1 The XIN pin 0.7 V
DD
V
Input low level voltage (2) V
IL
1 The XIN pin 0.3 V
DD
V
Input high level voltage (1) V
IH
2 Pins other than the XIN pin 2.2 V
Input low level voltage (2) V
IL
2 Pins other than the XIN pin 0.8 V
Output high level voltage V
OHIOH
= –1 µA VDD– 0.1 V
Output low level voltage V
OLIOL
= 1 µA 0.1 V
Allowable power dissipation Pd V
DD
= 5.0 V 175 250 mW
Parameter Symbol Conditions
Ratings
Unit
min typ max
Oscillator frequency f
X
16.9 18.5 MHz
BCLK frequency f
BCX
2.4 MHz
BCLK pulse width t
WB
100 ns
Data setup time t
DS
20 ns
Data hold time t
DH
20 ns
LRCK setup time t
LS
50 ns
LRCK hold time t
LH
50 ns
CNT1 pulse period t
SHIFT
1000 ns
CNT1 pulse width t
WS
300 ns
CNT2 pulse width t
WL
300 ns
Analog Characteristics at Ta = 25°C, VDD= 5.0 V
Note: * For a 1 kHz, 0 dB input, measured in the circuit presented as a sample application circuit.
Block Diagram
Pin Assignment
No. 4999-3/9
LC78855KM
Parameter Symbol Conditions
Ratings
Unit
min typ max
Total harmonic distortion THD + N 1 kHz, 0 dB 0.01 %
Signal-to-noise ratio S/N JIS-A 93 dB
Crosstalk CT 1 kHz, 0 dB 80 dB
Full-scale output level VFS * 1.7 Vrms
Dynamic range DR JIS-A 83 dB
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