SM5819HQF
NIPPON PRECISION CIRCUITS INC.—1
6-channel DSD-PCM Converter
OVERVIEW
The SM5819HQF is a 6-channel DSD data (64fs) to 4fs, 2fs or fs PCM data converter. During conversion, dec-
imation filtering is performed using a filter with selectable fixed coefficients (3 sets). Also, DSD inputs and
PCM outputs are available for use in master/slave clock mode operation, in a wide range of system configura-
tions, making it easy to construct a multi-channel DSD/PCM reproduction system.
FEATURES
512fs (22.5792MHz, fs = 44.1kHz), 1:2 to 2:1
duty master clock
DSD input and PCM output clock master/slave
switching
3-system external data input (3-wire format),
PCM output data/BCK/LRCK external input and
internal filter output switching
(BCK and LRCK are common to all 3 external
PCM data inputs)
Decimation filter coefficients
Fixed coefficients: 4fs-1/2fs-1/fs-1
PCM output mute operation
PCM output format: [MSB-first left-justified 32-
bit] or [IIS 32-bit]
(IIS 32-bit output bit clock frequency = 64
×
word
clock frequency)
FIR filter coefficients
64fs
4fs/2fs/fs: 960th-order (6-channel)
ROM coefficients: 24 valid data bits (4-bit MSB
extension at 4fs, 5-bit MSB extension at 2fs/fs)
+6dB DSD gain switching function
External/Internal system clock output switching
3.3V (3.0 to 3.6V) and 2.5V (2.3 to 2.7V) power
supplies
40 to 85
°
C operating temperature range
48-pin QFP package
APPLICATIONS
Multi-channel SA-CD players
SA-CD-compatible AV amplifiers
ORDERING INFORMATION
PINOUT
(Top view)
PACKAGE DIMENSIONS
(Unit: mm)
Device Package
SM5819HQF 48 -pin QFP
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
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
VDDL
SEL1FS
SEL4FS
DSGAIN
XMTPCM
VDDH
TEST1
SELEXT
VSS
TEST2
TEST3
TOUT1
VDDL
DIRPCK
FMTPCM
VSS
MCKOUT
VDDH
PBCK
PLRCK
POSLR
POCSW
POFLR
VSS
VDDL
MCK
TOUT2
VSS
EXIMCK
VDDH
EXIBCK
EXILRCK
EXISLR
EXICSW
EXIFLR
VSS
VDDL
DSBCK
DSIFL
DSIFR
DSICT
DSISW
DSISL
DSISR
DIRDSCK
SYNC
INIT
VSS
9 ± 0.4
7 ± 0.1
9 ± 0.4
7 ± 0.1
0.5 ± 0.2
0.125 0.025
+ 0.075
1.4 ± 0.1
1.7 MAX
0.1
0.5
0 ~ 10
0.18 0.05
+ 0.09
0.08
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—2
PIN DESCRIPTION
No. Name I/O Property
1
Input
voltage Description
1 VDDL
−−
2.5V Core power supply
2 SEL1FS I PD 3.3V PCM output rate select 1
L: 2fs/4fs, H: fs
3 SEL4FS I PD 3.3V PCM output rate select 2
L: 2fs, H: 4fs
4 SELEXT I PD 3.3V fs/2fs/4fs output and external data output select
L: fs/2fs/4fs data, H: external data (EXI**)
5 DSGAIN I PD 3.3V DSD signal gain setting
L: 100% modulation = 0dB, H: 50% modulation = 0dB
6 XMTPCM I PD 3.3V PCM output mute control input
L: Mute ON, H: Mute OFF
7 VDDH
−−
3.3V I/O power supply
8 TEST1 I PD 3.3V Test input 1 (must be open or tie LOW for normal operation)
9 TEST2 I PD 3.3V Test input 2 (must be open or tie LOW for normal operation)
10 TEST3 I PD 3.3V Test input 3 (must be open or tie LOW for normal operation)
11 TOUT1 O
−−
Test output 1
12 VSS
−−
Ground
13 VDDL
−−
2.5V Core power supply
14 DIRPCK I PD 3.3V PCM output PBCK/PLRCK I/O select
L: Output (master mode), H: Input (slave mode)
15 FMTPCM I PD 3.3V PCM output format select
L: MSB-first left-justified 32-bit, H: IIS 32-bit
16 VSS
−−
Ground
17 MCKOUT O 12mA
System clock output (selected by SELEXT)
18 VDDH
−−
3.3V I/O power supply
19 PBCK I/O S, 6mA 3.3V PCM output BCK bit clock
20 PLRCK I/O S, 6mA 3.3V PCM output LRCK word clock
21 POSLR O 2mA
PCM data output: surround left/right-channel
22 POCSW O 2mA
PCM data output: center/subwoofer channel
23 POFLR O 2mA
PCM data output: front left/right-channel
24 VSS
−−
Ground
25 VDDL
−−
2.5V Core power supply
26 TOUT2 O
−−
Test output 2
27 MCK I
3.3V Master clock input: 512fs (22.5792MHz, fs = 44.1kHz)
28 VSS
−−
Ground
29 EXIMCK I
3.3V External system clock input
30 VDDH
−−
3.3V I/O power supply
31 EXIBCK I S 3.3V External PCM data BCK bit clock input
32 EXILRCK I S 3.3V External PCM data LRCK word clock input
33 EXISLR I
3.3V External PCM data input: surround left/right-channel
34 EXICSW I
3.3V External PCM data input: center/subwoofer channel
35 EXIFLR I
3.3V External PCM data input: front left/right-channel
36 VSS
−−
Ground
37 VDDL
−−
2.5V Core power supply
38 DSBCK I/O S, 6mA 3.3V DSD data input bit clock. Controlled by DIRDSCK
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—3
39 DSIFL I
3.3V DSD data input: front left-channel
40 DSIFR I
3.3V DSD data input: front right-channel
41 DSICT I
3.3V DSD data input: center channel
42 DSISW I
3.3V DSD data input: subwoofer channel
43 DSISL I
3.3V DSD data input: surround left-channel
44 DSISR I
3.3V DSD data input: surround right-channel
45 DIRDSCK I PD 3.3V DSBCK I/O select
L: input (slave), H: output (master)
46 SYNC I S, PU 3.3V Forced synchronization input (active-HIGH edge)
47 INIT I S, PU 3.3V Initialization input: Active-LOW, Resync on “L
“H”
48 VSS
−−
Ground
1. S = Schmitt, PU = pull-up resistor, PD = pull-down resistor, mA = output current
No. Name I/O Property
1
Input
voltage Description
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—4
BLOCK DIAGRAM
DSIFL
DSIFR
DSICT
DSISL
DSISR
DSISW
DSGAIN
SEL1FS
SEL4FS
XMTPCM
EXIFLR
EXISLR
FIR FILTER
and
DOWN SAMPLING
UNIT
PCM
MUTE
ROM
24bit 1440word
(fs 480w)
(2fs 480w)
(4fs 480w)
EXICSW
INT/EXT.
DATA
SELECT
FMTPCM
POFLR
POSLR
POCSW
INT/EXT.
CLOCK
SELECT
CLOCK
GENERATOR
and
TIMING
CONTROL
SELEXT
PBCK
PLRCK
MCKOUT
SYNC
INIT
DIRDSCK
DSBCK
MCK (Internal Clocks)
DIRPCK
TEST1
TEST2
TEST3 TOUT2
TEST
CONTROL
TOUT1
EXILRCK
EXIBCK
EXIMCK
PCM
I/F
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—5
SPECIFICATIONS
Absolute Maximum Ratings
V
SS
= 0V
Recommended Operating Conditions
V
SS
= 0V
DC Electrical Characteristics
V
DDH
= 3.0 to 3.6V, V
DDL
= 2.3 to 2.7V, V
SS
= 0V, T
OPR
= –40 to 85
°
C unless otherwise noted.
Pin summary
Parameter Symbol Rating Unit
Supply voltage 1 V
DDH
–0.3 to 4.0 V
Supply voltage 2 V
DDL
–0.3 to 3.0 V
Input voltage (3.3V) V
IN
–0.3 to V
DDH
+ 0.5 V
Power dissipation P
D
200 mW
Storage temperature range T
STG
–55 to 125
°
C
Parameter Symbol Rating Unit
Supply voltage 1 V
DDH
3.0 to 3.6 V
Supply voltage 2 V
DDL
2.3 to 2.7 V
Operating temperature T
OPR
–40 to 85
°
C
Parameter Pin Symbol Condition
Rating
Unit
min typ max
Current consumption 1 VDDH I
DDH
All pins no load
––5mA
Current consumption 2 VDDL I
DDL
––60mA
Input voltage
“H" level (*1) V
IH
V
DDH
= 3.6V 2.0 V
“L" level (*1) V
IL
V
DDH
= 3.0V 0.8 V
Schmitt-trigger voltage
Positive (*2) V
T+
1.1 2.4 V
Negative (*2) V
T–
0.6 1.8 V
Hysteresis voltage (*2) V
H
0.1 V
Output voltage
"H" level (*3) V
OH
I
OH
= –2mA (Type1)
I
OH
= –6mA (Type2)
I
OH
= –12mA (Type3)
V
DDH
– 0.4 V
"L" level (*3) V
OL
I
OL
= +2mA (Type1)
I
OL
= +6mA (Type2)
I
OL
= +12mA (Type3)
0.4 V
Input leakage current (*1, 2) I
LI
–5 5
µ
A
Pull-down resistor (*4) R
PD
V
I
= V
DDH
60 120 288 k
Pull-up resistor (*5) R
PU
V
I
= V
SS
60 120 288 k
(*1) Input pins and bidirectional (input/output) pins in input mode
(*2) Inputs with Schmitt characteristic and bidirectional (input/output) pins in input mode
(*3)
Output pins and bidirectional (input/output) pins in output mode
Type 3: MCKOUT
Type 2: DSBCK, PBCK, PLRCK
Type 1: Outputs excluding those above
(*4) Inputs with pull-down resistor
(*5) Inputs with pull-up resistor
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—6
AC Electrical Characteristics
V
DDH
= 3.0 to 3.6V, V
DDL
= 2.3 to 2.7V, V
SS
= 0V, T
OPR
= –40 to 85
°
C, fs = 44.1kHz unless otherwise noted.
When DSBCK and PLRCK clocks are supplied by external clock input, their frequencies are related to the
MCK input frequency by the following frequency divider ratios.
(DSBCK) cycle = 8
×
MCK cycle (64fs)
(PLRCK) cycle [4fs mode] = 128
×
MCK cycle (4fs)
(PLRCK) cycle [2fs mode] = 256
×
MCK cycle (2fs)
(PLRCK) cycle [fs mode] = 512
×
MCK cycle (fs)
System clock
MCK pin
External system clock
EXIMCK pin
Parameter Symbol
Rating
Unit
min typ max
"H"-level pulsewidth t
MCWH
13 ns
"L"-level pulsewidth t
MCWL
13 ns
Pulse cycle t
MCY
40 44.29 (1/512fs) ns
Rise/fall time t
r
, t
f
10 ns
Parameter Symbol
Rating
Unit
min typ max
"H"-level pulsewidth t
ECWH
13 ns
"L"-level pulsewidth t
ECWL
13 ns
Pulse cycle t
ECY
40 ns
Rise/fall time t
er
, t
ef
10 ns
0.9VDDH
MCK
trtf
tMCWH tMCWL
tMCY
0.5VDDH
0.1VDDH
0.9VDDH
EXIMCK
ter tef
tECWH tECWL
tECY
0.5VDDH
0.1VDDH
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—7
DSD input
DSBCK pin
DSIFL, DSIFR, DSISL, DSISR, DSICT, DSISW pins
Note. DSD clock pulsewidth and DSD clock pulse cycle when DSBCK is in input mode.
Note. The data, with DSBCK timing above, enters the internal circuits on the falling edge of the MCK clock. Consequently, if the timing changes, the circuit
must be resynchronized using INIT or SYNC.
Parameter Symbol
Rating
Unit
min typ max
DSD clock pulsewidth tDSCW 150 177.16 ns
DSD clock pulse cycle tDSCY 300 354.31 (1/64fs) ns
DSD data setup time tDSS 50 ns
DSD data hold time tDSH 50 ns
DSI**: DSIFL, DSIFR, DSISL, DSISR, DSICT, DSISW pins
DSBCK
t
DSCW
t
DSCW
t
DSCY
t
DSS
t
DSH
DSI**
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—8
PCM output
PLRCK, PBCK, POFLR, POSLR, POCSW pins
Note. The PCM output relationship applies when the external inputs (EXI**) are not in through mode.
Note. fs/2fs/4fs bit clock and word clock relationship applies when PBCK and PLRCK are in input mode.
Parameter Symbol
Rating
Unit
min typ max
BCK clock pulsewidth
4fs
tPBCW
40 44.29 ns
2fs 40 88.58 – ns
fs 40 177.15 – ns
BCK clock pulse cycle
4fs
tPBCY
80 88.58 (1/256fs) ns
2fs 80 177.15 (1/128fs) ns
fs 80 354.31 (1/64fs) ns
Word CK setup time tPLBS 30 ns
Word CK hold time tPLBH 10 ns
Bit CK data delay time tPBDLY 0 15 ns
Word CK data delay time tPLDLY 0 15 ns
PO**: POFLR, POSLR, POCSW pins
tPBCW
PBCK
tPBCW
tPBCY
PLRCK
tPLBH tPLBS
tPLDLY tPBDLY
PO**
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—9
Clock outputs
MCKOUT, DSBCK, PLRCK, PBCK pins
Note. Applies when MCK clock is output on MCKOUT in through mode.
Note. Applies when each word/bit clock on DSBCK, PBCK, PLRCK is in output mode.
Through-mode output
MCKOUT, PBCK, PLRCK, POFLR, POSLR, POCSW pins
Parameter Symbol
Rating
Unit
min typ max
MCKOUT output delay time tCKODLY 0 10 ns
Word/bit clock output delay time tCKDLY 0 10 ns
Through inputs Through outputs Condition tTHDLY MAX Unit
EXIMCK MCKOUT
PCM outputs with external inputs selected
10 ns
EXIBCK PBCK 10 ns
EXIWCK PLRCK 10 ns
EXIFLR POFLR 15 ns
EXISLR POSLR 15 ns
EXICSW POCSW 15 ns
MCKOUT
t
CKODLY
t
CKDLY
Word/Bit clock outputs
MCK
t
CKODLY
Through mode output
t
THDLY
Through mode input
t
THDLY
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—10
Initialization and resynchronization
INIT, SYNC pins
Parameter Symbol
Rating
Unit
min typ max
Initialization time tINTM 6 × tMCY ––ns
Resynchronization pulsewidth tSYCW 6 × tMCY ––ns
t
INTM
INIT
SYNC
t
SYCW
t
INTM
VDDH 3.0V
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—11
FUNCTIONAL DESCRIPTION
Data Input/Output Formats
DSD input format
DSD input data is read in on the rising edge of the DSBCK bit clock.
PCM output format
The PCM output format can be assigned to either of two types below using FMTPCM. The output data is in 32-
bit 2s complement form. The PLRCK and PBCK frequencies are set in response to the fs/2fs/4fs switch mode.
However, when external inputs are selected, the inputs are passed to the output in through mode, regardless of
the assigned format.
(1) MSB-first left-justified 32-bit (FMTPCM = “L”)
If more than 32 bit clock cycles are input during a word clock cycle HIGH-level or LOW-level pulse, all bits
after the 32nd bit are output as “0”.
When PLRCK and PBCK are set to output mode, the number of bit clock cycles during a word clock HIGH-
level or LOW-level pulse is fixed at 32.
(2) IIS 32-bit (FMTPCM = “H”)
In this format, there are 32 bit clock cycles per word clock cycle regardless of the input/output settings.
DSI**: DSIFL, DSIFR, DSISL, DSISR, DSICT, DSISW pins
PO**: POFLR, POSLR, POCSW pins
PO**: POFLR, POSLR, POCSW pins
DSBCK
DSI**
(1/64fs)
PLRCK
(1/fs, 1/2fs, or 1/4fs)
31 30 29 28
MSB
PBCK
PO** 2 1 0 31 30
LSB
29 28 2 1 0 31 30
Lch (POSLR, POFLR)
Center (POCSW)
Rch (POSLR, POFLR)
SubWoofer (POCSW)
PLRCK
(1/fs, 1/2fs, or 1/4fs)
031 30 29 4 3 2 0 31 30
MSB
031
LSB
PBCK
PO** 29 4 3 2
Rch (POSLR, POFLR)
SubWoofer (POCSW)
Lch (POSLR, POFLR)
Center (POCSW)
1 1 1
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—12
Data Output Selection
PCM output selection
The PCM output and decimation filter processing is set by SEL4FS, SEL1FS and SELEXT, as shown in the
following table.
The external data setting (SELEXT) has priority over the 4fs/2fs/fs selection setting (SEL1FS, SEL4FS).
Also, the fs setting (SEL1FS) has priority over the 4fs/2fs setting (SEL4FS).
In the case of 4fs mode, the PCM data is a setting which passes through passband. When the DSGAIN is set
to HIGH, it may clip depending on signal. Therefore, please use at DSGAIN = LOW.
Clock Input/Output Selection and Resynchronization Operation
DSD clock input/output switching
The DSD input bit clock (DSBCK) can be switched between input and output by DIRDSCK.
PCM clock input/output switching
The PCM output word clock (PLRCK) and bit clock (PBCK) can be switched between input and output by
DIRPCK.
However, when external data is selected using SELEXT, the clocks PLRCK and PBCK are switched to outputs,
regardless of the DIRPCK setting, thus care must be exercised with external connections.
Setting PCM output system Clock
output Filter
processing
SEL1FS SEL4FS SELEXT POFLR POSLR POCSW PLRCK
PBCK MCKOUT
LHL
DSIFL
DSIFR
DSISL
DSISR
DSICT
DSISW 4fs MCK 4fs
960th-order
LLL
DSIFL
DSIFR
DSISL
DSISR
DSICT
DSISW 2fs MCK 2fs
960th-order
H L or H L DSIFL
DSIFR
DSISL
DSISR
DSICT
DSISW fs MCK fs
960th-order
L or H L or H H EXIFLR EXISLR EXICSW EXILRCK
EXIBCK EXIMCK Invalid
Setting I/O state
DIRDSCK DSBCK
L Input (Slave)
H Output (Master)
Setting I/O state
DIRPCK PLRCK
PBCK
L Output (Master)
H Input (Slave)
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—13
Input clock sync operation and resynchronization
The internal computation and interface processing for data output is event driven, with the word boundary edge
of the word clock as the trigger. This ensures the output signals are synchronized, regardless of the word clock
and bit clock input/output settings.
The DSD input comprises data read into a buffer on the rising edge of the DSBCK bit clock (BUF_A) and data
in another buffer internally delayed by half a bit clock cycle (BUF_B), and then a buffer is selected when the
PCM output event occurs in order to avoid DSD input signal transitions.
Synchronization of whichever data buffer is selected occurs when the word boundary edge of the word clock is
detected after the first DSBCK falling edge following a rising edge on INIT or SYNC.
1) On the first DSBCK falling edge after a rising edge of SYNC or INIT, (IN_PHASE) is a phase reference sig-
nal for input data buffer selection.
2) Then, the input data buffer selected is determined by the logic level of IN_PHASE when the first PLRCK
word boundary edge is detected.
When synchronization is adjusted using INIT or SYNC (resynchronization), 1 DSD data unit may be lost or
repeated depending on the phase difference between input/output clocks.
The individual outputs should be muted by a minimum interval, given below, to avoid these data glitches.
[4fs PCM output] 36 clock cycles in PLRCK (4fs) mode
[2fs PCM output] 18 clock cycles in PLRCK (2fs) mode
[fs PCM output] 10 clock cycles in PLRCK (fs) mode
DSI**: DSIFL, DSIFR, DSISL, DSISR, DSICT, DSISW pins
Figure 1. Input timing synchronization operation using INIT and SYNC
;;;;;;;;;;
;;;;;;;;;;
;;;;;;;;;;
;;;;;;;;;;
;;;;;;;;;;
;;;;;;;;;;
;;;;;;;;;;
;;;;;;;;;;
;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;
;;;;
;
;;
;
;;;;
;;;;
;
;;
;
;;;;
SNYC/INIT
DSI** D (n) D (n+1) D (n+2) D (n+3) D (n+3)
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;
;;;;;;;
;;;;;;;
;;;;;;;
;;;;;;;
;;;;;;;
;;;;;;;
;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;;;;;;
;;;
;;;
;;;
;;;
;;;
;;;
;;;
;;;
;;;;
;;;;
;;;;
;;;;
;;;;
;;;;
;;;;
;;;;
DSBCK
(BUF_A)
;;;;;;;
;;;;;;;
;;;;;;;
;;;;;;;
;;;;;;;
;;;;;;;
;;;;;;;
;;;;;;;
DA (n) DA (n+1) DA (n+2) DA (n+3)
(BUF_B)
DB (n) DB (n+1) DB (n+2) DB (n+2)
(IN_PHASE)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(PCM_SEL)
PLRCK (Word boundary edge)
(Filter Input)
DB (n+1) DB (n+2)
DB (n-1)
(Select "BUF_A")
DA (n-1) DA (n) DA (n+1)
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—14
External input data and external system clock output switching
(1) Switching to external input data
When SELEXT is switched LOW to HIGH, the PCM data output is immediately switched to external
input data.
PLRCK and PBCK are similarly switched immediately to EXILRCK and EXIBCK in through mode,
respectively, regardless of the DIRPCK setting.
(2) Switching to external system clock
The MCKOUT system clock output can be switched between MCK and EXIMCK using SELEXT, as
given below.
SELEXT = “L”: MCK output
SELEXT = “H”: EXIMCK output
Note that neither MCK nor EXIMCK clock should be stopped during the switching interval to prevent a
micro-pulse being generated when switching.
The switching interval lasts from when SELEXT changes state until both clocks have made 4 transitions.
During this interval, the LOW-level clock pulsewidth of the first clock is extended until the rising edge of
the second clock occurs.
When the switching interval ends, the unused clock may then be stopped.
Figure 2. MCK EXIMCK switching
Figure 3. EXIMCK MCK switching
MCK
EXIMCK
SELEXT
MCKOUT
OFF
ON
(Switching time)
(MCK OFF) (EXIMCK ON)
MCK
EXIMCK
SELEXT
MCKOUT
OFF
ON
(Switching time)
(MCK ON)(EXIMCK OFF)
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—15
DSD Gain Switching
The PCM output can be adjusted such that 0dB corresponds to 50% modulation level DSD input signal using
DSGAIN, as given below.
DSGAIN = “L” : 100% modulation = 0dB (PCM)
DSGAIN = “H” : 50% modulation = 0dB (PCM) * with +6dB internal amplification
Note. When DSGAIN = “H”, note that any input DSD signal with modulation of 50% level or higher will be amplitude limited, resulting in output signal clip-
ping.
Note. In the case of 4fs mode, the PCM data is a setting which passes through passband. When the DSGAIN is set to HIGH, it may clip depending on sig-
nal. Therefore, please use at DSGAIN = LOW.
Mute Function
The PCM outputs can be muted using XMTPCM, as given below. Muting is applied immediately before output.
When PCM muting is set ON, the PCM outputs are directly set to value “0”.
XMTPCM = “L” : all PCM outputs muting ON
XMTPCM = “H” : all PCM outputs muting OFF
The mute function is only active for internal computation of fs/2fs/4fs output. It is inactive for external input to
output connection in through mode.
Initialization Operation
The power must be applied in order of VDDL and VDDH. Please avoid the continuous power supply injection
of only VDDH. (less than 1 second)
After power is applied, INIT must be held LOW for the rated interval to initialize the device. During initializa-
tion, the outputs have the following states.
When INIT goes HIGH, synchronization operation begins as described in the section “Input clock sync opera-
tion and resynchronization”.
Note that if the PCM signal muting is ON during initialization, muting operation continues until it is released.
The system clock input on MCK must be applied during initialization.
Figure 4. DSD modulation level
Pin state
PCM data outputs LOW in internal data output mode
External input to output connection in through mode
DSBCK HIGH in output (master) mode
PBCK HIGH in internal data output mode
External bit clock input to output connection in through mode
PLRCK
LOW in 32-bit left-justified output mode
HIGH in IIS output mode
External word clock input to output connection in through mode
MCKOUT MCK or EXIMCK, whichever is currently selected.
+1.0
+0.5
0
-0.5
-1.0
[00000000h]
[7FFFFFFFh]
[7FFFFFFFh]
[80000000h]
[80000000h]
[00000000h]
0dB when
DSGAIN="H"
0dB when
DSGAIN="L"
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—16
BUILT-IN FILTER CHARACTERISTICS
Filter Mode Cutoff Characteristics
-10
0
10
0 102030405060708090
100 [kHz]
[dB]
fs
2fs
4fs
-180
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-5
-4
-3
-2
-1
0
1
0 10203040506070
[kHz]
[dB]
fs
2fs
4fs
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—17
Filter Mode Ripple Characteristics
Note. In the case of 4fs mode, the PCM data is a setting which passes through passband. When the DSGAIN is set to HIGH, it may clip depending on sig-
nal. Therefore, please use at DSGAIN = LOW.
2fs
fs
-0.008692
-0.008690
-0.008688
-0.008686
-0.008684
-0.008682
-0.008680
05
10 15 20 25 30 35 40 45 50
[kHz]
[dB]
-0.008700
-0.008698
-0.008696
-0.008694
4fs
-0.000006
-0.000004
-0.000002
0.000000
0.000002
0.000004
0.000006
0.000008
0.000010
0 5 10 15 20 25 30 35 40 45 50 [kHz]
[dB]
-0.000010
-0.000008
SM5819HQF
NIPPON PRECISION CIRCUITS INC.—18
NC0407AE 2004.10
Please pay your attention to the following points at time of using the products shown in this document.
The products shown in this document (hereinafter “Products”) are not intended to be used for the apparatus that exerts harmful influence on
human lives due to the defects, failure or malfunction of the Products. Customers are requested to obtain prior written agreement for such
use from NIPPON PRECISION CIRCUITS INC. (hereinafter “NPC”). Customers shall be solely responsible for, and indemnify and hold NPC
free and harmless from, any and all claims, damages, losses, expenses or lawsuits, due to such use without such agreement. NPC reserves
the right to change the specifications of the Products in order to improve the characteristic or reliability thereof. NPC makes no claim or
warranty that the contents described in this document dose not infringe any intellectual property right or other similar right owned by third
parties. Therefore, NPC shall not be responsible for such problems, even if the use is in accordance with the descriptions provided in this
document. Any descriptions including applications, circuits, and the parameters of the Products in this document are for reference to use the
Products, and shall not be guaranteed free from defect, inapplicability to the design for the mass-production products without further testing
or modification. Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in
compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested
appropriately take steps to obtain required permissions or approvals from appropriate government agencies.
NIPPON PRECISION CIRCUITS INC.
4-3, Fukuzumi 2-chome, Koto-ku,
Tokyo 135-8430, Japan
Telephone: +81-3-3642-6661
Facsimile: +81-3-3642-6698
http://www.npc.co.jp/
Email: sales@npc.co.jp