LC78835KM Datasheet PDF - Sanyo Semicon Device

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LC78835KM
Sanyo Semicon Device

Part Number LC78835KM
Description 18 Bits Digital Filter and D/A Converter for Digital Audio
Page 14 Pages


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Ordering number : EN4624B
CMOS IC
LC78835K, 78835KM
18 Bits Digital Filter and D/A Converter
for Digital Audio
Overview
The LC78835K and 78835KM are 18-bit digital-to-analog
D/A converter CMOS ICs with an on-chip eight-times
oversampling digital filter. The LC78835 and the
LC78835M are pin compatible.
Features
• Digital filter
— 8 fs oversampling filter: 3-stage finite-impulse-
response (FIR) filter design (43rd-, 11th-, and third-
orders)
— De-emphasis filter: Supports fs = 32 kHz, 44.1 kHz,
or 48 kHz
— Soft mute
— Noise shaper
— Supports double-rate sampling
• D/A converter
— Dynamic level-shifting 18-bit digital-to-analog
converter
— On-chip 2-channel D/A converter (with
corresponding output)
— On-chip output op-amp
— Supports 384 fs, 392 fs, 448 fs, or 512 fs system
clock
— Single 5 V supply
— Permits low-voltage operation (3.5 V)
— Low-power silicon-gate CMOS process
Package Dimensions
unit: mm
3092-DIP24W
[LC78835K]
unit: mm
3155-MFP24
[LC78835KM]
SANYO: DIP24W
SANYO: MFP24
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
73696HA (OT)/N1094TH (OT)/82793JN No. 4624-1/14



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LC78835K, 78835KM
Specifications
Absolute Maximum Ratings at Ta = 25°C, VSS = 0°C
Parameter
Maximum supply voltage
Input voltage
Output voltage
Operating temperature
Storage temperature
Symbol
VDD max
VIN
VOUT
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
Allowable Operating Ranges
Parameter
Supply voltage
Reference voltage high
Reference voltage low
Operating temperature
Symbol
VDD
Vref H
Vref L
Topr
Conditions
min
3.5
VDD – 0.3
0
–30
Ratings
typ
5.0
max
5.5
VDD
0.3
+75
Unit
V
V
V
°C
DC Characteristics at Ta = –30 to +75°C, VDD = 3.5 to 5.5 V, VSS = 0 V
Parameter
Symbol
Conditions
Input high level voltage (1)
VIH1
3, 4, 5, 6, 7, 13, 14, 15, 16, 17 and 18 pin
Input low level voltage (1)
VIL1 3, 4, 5, 6, 7, 13, 14, 15, 16, 17 and 18 pin
Input high level voltage (2)
VIH2
11 pin
Input low level voltage (2)
VIL2
11 pin
Output high level voltage
VOH
9 pin: IOH = –3 mA
Output low level voltage
VOL 9 pin: IOL = 3 mA
Input leakage current
IL *, VI = VSS, VDD
Note: * 3, 4, 5, 6, 7, 11, 13, 14, 15, 16, 17 and 18 pin
min
2.2
0.7VDD
2.4
–25
AC Characteristics at Ta = –30 to +75°C, VDD = 3.5 to 5.5 V, VSS = 0 V
Parameter
Oscillation frequency
Clock pulse width
Clock pulse phase
BCLK pulse width
BCLK pulse phase
Data setup time
Data hold time
LRCK setup time
LRCK hold time
Symbol
fX
tCW
tCY
tBCW
tBCY
tDS
tDH
tLRS
tLRH
Conditions
XIN pin for crystal oscillator
With external clock input to other than XIN pin
With external clock input to other than XIN pin
min
1.0
18
40
60
120
40
40
40
40
Ratings
typ
max
0.8
0.3VDD
0.4
+25
Ratings
typ
max
25
1000
Unit
V
V
V
V
V
V
µA
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
No. 4624-2/14



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Audio Input Waveforms
LC78835K, 78835KM
Electrical Characteristics (1)
at Ta = 25°C, AVDD = DVDD = VrefH = 5.0 V, AGND = DGND = VrefL = 0 V, unless otherwise specified
Parameter
Symbol
Conditions
D/A converter resolution
Total harmonic distortion
Dynamic range
Crosstalk
Signal-to-noise ratio
Full-scale output voltage
Power dissipation
Output load resistance
RES
THD
DR
CT
S/N
VFS
Pd
RL
At 1 kHz, 0 dB*1
At 1 kHz, –60 dB
At 1 kHz, 0 dB
JIS-A
*2
21, 23 pin
Note: 1. “0 dB” signifies full scale.
2. XIN pulse width (pin 11) 1.5 to 3.5 V, fx = 16.9344 MHz
Test circuit: Based on application circuit
Ratings
Unit
min typ max
18 Bits
0.08 %
90 dB
–85 dB
96 dB
3.0 VP-P
135 200 mW
5 k
No. 4624-3/14



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LC78835K, 78835KM
Electrical Characteristics (2)
at Ta = 25°C, AVDD = DVDD = VrefH 3.5 V, AGND = DGND = VrefH = 0 V, unless otherwise specified
Parameter
Symbol
Conditions
D/A converter resolution
Total harmonic distortion
Dynamic range
Crosstalk
Signal-to-noise ratio
Full-scale output voltage
Power dissipation
Output load resistance
RES
THD
DR
CT
S/N
VFS
Pd
RL
At 1 kHz, 0dB*1
At 1 kHz, –60 dB
At 1 kHz, 0 dB
JIS-A
*2
21, 23 pin
Note: 1. “0 dB” signifies full scale.
2. XIN pulse width (pin 11) 1.0 to 2.5 V, fx = 16.9344 MHz
Test circuit: Based on application circuit
Ratings
Unit
min typ max
18 Bits
0.09 %
90 dB
–85 dB
96 dB
2.1 VP-P
50 75 mW
15 k
Block Diagram
Pin Assignment
No. 4624-4/14



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LC78835K 18 Bits Digital Filter and D/A Converter for Digital Audio LC78835K
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LC78835KM 18 Bits Digital Filter and D/A Converter for Digital Audio LC78835KM
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LC78835KM pdf

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