Datasheet SM5882AS, SM5883AS, SM5883BS, SM5885CS Datasheet (NPC)

Σ

Σ∆

Σ∆

DECO SM588 × series

NIPPON PRECISION CIRCUITS INC.

Audio 3rd-order Σ∆ D/A Converter

OVERVIEW

The Σ DECO SM588 × series, fabricated using NPC’s Molybdenum-gate CMOS process, are D/A converter ICs
for digital audio, that provide all the basic converter functions in miniature 8-pin packages. They each feature
built-in 8-times oversampling digital filter, Σ∆ jitter-compensated D/A converter, and post-analog lowpass fil­ter converter stages required for digital audio. They can sample at up to 96kHz for 16 or 24-bit input word
length. A type with built-in deemphasis filter is also available for applications requiring deemphasis.

FEATURES

3-wire Input

■

2-channel stereo configuration

■

256fs, 384fs, or 512fs system clock (applied by
product / version)

■

Input format
3-wire serial, MSB first, rear-packed
16 or 24-bit (applied by product / version)

■

8-times oversampling digital filter

• 32 dB stopband attenuation

• ±0.05 dB passband ripple

■

2-channel D/A converter

• 3rd-order noise shaper

• Oversampling operation

■

3rd-order post-analog lowpass filter

■

4.5 to 5.5 V supply voltage

■

8-pin SOP

■

Molybdenum-gate CMOS process

2-wire Input with Deemphasis Filter

■

2-channel stereo configuration

■

256fs, 384fs, or 512fs system clock (applied by
product / version)

■

Input format
2-wire serial, MSB first, rear-packed
16 or 24-bit (applied by product / version)

■

Deemphasis filter (fs = 44.1 kHz sample rate)

■

8-times oversampling digital filter

• 32 dB stopband attenuation

• ±0.05 dB passband ripple

■

2-channel D/A converter

• 3rd-order noise shaper

• Oversampling operation

■

3rd-order post-analog lowpass filter

■

4.5 to 5.5 V supply voltage

■

8-pin SOP

■

Molybdenum-gate CMOS process

APPLICATIONS

■

Audio equipment

PINOUTS

3-wire input 2-wire input with built-in deemphasis filter

CLK

1

4

5
88

8

5

DATA

BCKI

LRCI

ORDERING INFORMATION

Device Package

SM5882AS

SM5883AS

SM5883BS

SM5885CS

LO

VDD

VSS

RO

8-pin SOP

DATA

DEEM

LRCI

CLK

1

5
88

4

NIPPON PRECISION CIRCUITS—1

LO

8

VDD

VSS

RO

5

PACKAGE DIMENSIONS

(Unit : mm)

Weight : 0.07g

SM588 × series

4.4 0.2

6.2 0.3

0.15

+

−

0.05

0.1

0.4 0.2

0.695typ

5.2 0.3

0.05 0.05

1.5 0.1

1.27

0.10

0.4 0.1

0.12

M

SERIES LINEUP

Device Input length Type Pin 2 function Master clock

SM5882AS 16 2-wire input Deemphasis control 384fs

SM5883AS 16 3-wire input Bit clock input 384fs

SM5883BS 16 3-wire input Bit clock input 256fs

SM5885CS 24 3-wire input Bit clock input 512fs

0 to 10

NIPPON PRECISION CIRCUITS—2

BLOCK DIAGRAM

LRCI DATA

SM588 × series

CLK

Timing

control

9 Level

DEM DAC

9 Level

DEM DAC

Input interface

LR

Filter & attenuation

operation block

LR

Noise shaper

operation block

9 Level

DEM DAC

BCKI*

DEEM**

9 Level

DEM DAC

+−

LO VSS RO

* : Not available for 2-wire input type
** : Not available for 3-wire input type

VDD

+−

PIN DESCRIPTION

Number Name I/O Description

1 DATA I Serial data input

1

2

3 LRCI I Sample rate (fs) clock input. Left-channel input when HIGH, and right-channel input when LOW.

4 CLK I External clock input

5 RO O Right-channel analog output

6 VSS – Ground

7 VDD – Supply

8 LO O Left-channel analog output

BCKI

DEEM

2

I Bit clock input

I Deemphasis ON/OFF control (44.1 kHz, ON when HIGH)

1. 3-wire type

2. 2-wire type with built-in deemphasis filter

NIPPON PRECISION CIRCUITS—3

SM588 × series

SPECIFICATIONS

Absolute Maximum Ratings

V

= 0 V

SS

Parameter Symbol Rating Unit

Supply voltage range V

Input voltage range

Storage temperature range T

Power dissipation P

1. All inputs
Also applicable during supply switching.

Recommended Operating Conditions

1

−

−

+

−

°

−

° C

0.3 to 7.0 V

V

SS

0.3 to V

0.3 V

DD

55 to 125

300 mW

C

V

STG

DD

IN

D

V

= 0 V

SS

Parameter Symbol Rating Unit

Supply voltage V

Operating temperature T

DD

OPR

DC Characteristics

V

= 4.5 to 5.5 V, V

DD

Parameter Symbol Condition

Current consumption

1

CLK HIGH-level input voltage V

CLK LOW-level input voltage V

CLK AC-coupled input voltage V

HIGH-level input voltage

LOW-level input voltage

CLK HIGH-level input current I

CLK LOW-level input current I

Input leakage current

1. V

= 5 V, CLK clock input frequency f

DD

Input data: NPC pattern.

2

2. Pins BCKI (3-wire type), DEEM (2-wire type with deemphasis filter), DATA, LRCI

= 0 V, Ta = − 40 to 85 ° C

SS

2

2

V

= 16.9344 MHz (384fs type)/11.2896 MHz (256fs type)/22.5792MHz (512fs type), no output load.

CLK

I

DD

INAC

V

I

LH

I

IH1

IL1

IH2

IL2

IH

IL

LL

Clock input 0.7V

Clock input – – 0.3V

V

= V

IN

DD

V

= 0 V 20 62 170 µA

IN

V

= V

IN

DD

V

= 0 V – – 1.0 µA

IN

4.5 to 5.5 V

40 to 85

Rating

min typ max

– 12.5 25.0 mA

DD

––V

DD

0.7 – – V

0.5V

DD

– – 0.2V

––V

DD

20 62 170 µA

– – 1.0 µA

Unit

V

p-p

V

NIPPON PRECISION CIRCUITS—4

AC Digital Characteristics

V

= 4.5 to 5.5 V, V

DD

System clock (CLK)

256fs type

= 0 V, Ta = − 40 to 85 ° C

SS

SM588 × series

Parameter Symbol

HIGH-level clock pulsewidth t

LOW-level clock pulsewidth t

Clock pulse cycle t

384fs type

Parameter Symbol

HIGH-level clock pulsewidth t

LOW-level clock pulsewidth t

Clock pulse cycle t

512fs type

Parameter Symbol

HIGH-level clock pulsewidth t

LOW-level clock pulsewidth t

Clock pulse cycle t

CWH

CWL

XI

CWH

CWL

XI

CWH

CWL

XI

Rating

Unit

min typ max

20.0 – 125 ns

20.0 – 125 ns

40.0 – 250 ns

Rating

Unit

min typ max

13.15 – 125 ns

13.15 – 125 ns

26.3 – 250 ns

Rating

Unit

min typ max

10 – 125 ns

10 – 125 ns

20 – 250 ns

CLK

t

CWL

V

IH1

0.5V

DD

V

t

CWH

t

XI

NIPPON PRECISION CIRCUITS—5

IL1

Serial inputs

3-wire type (BCKI, DATA, LRCI)

SM588 × series

ns

Parameter Symbol

BCKI HIGH-level pulsewidth t

BCKI LOW-level pulsewidth t

BCKI pulse cycle t

DATA setup time t

DATA hold time t

LRCI edge to first BCKI rising edge t

Last BCKI rising edge to LRCI edge t

BCKI

t

BCWH

t

BCWL

t

BCY

DATA

t

DS

LRCI

t

LB

2-wire type (DATA, LRCI)

t

DH

BCWH

BCWL

BCY

DS

DH

LB

BL

Rating

min typ max

Unit

50.0 – – ns

50.0 – – ns

1/(64fs) – – ns

50.0 – – ns

50.0 – – ns

50.0 – – ns

50.0 – – ns

V

0.35

DD

V

0.35

DD

V

0.35

DD

t

BL

Parameter Symbol Condition

DATA setup time t

DATA hold time t

LRCI edge to internal BCLK rising edge t

DS

DH

256fs/512fs 1.5t

LB

384fs 3.5t

Internal

BCLK

t

DS

DATA

LRCI

t

LB

Control input (DEEM: 2-wire type)

Parameter Symbol

Rise time t

Fall time t

Rating

min typ max

Unit

50 – – ns

50 – – ns

XI

XI

– 2.5t

– 4.5t

XI

XI

0.35

t

DH

0.35

0.35

Rating

min typ max

r

f

– – 50 ns

– – 50 ns

ns

V

DD

V

DD

V

DD

Unit

DEEM

0.5VDD

tf tr

0.2VDD

0.5VDD

0.2VDD

0.35V

DD

NIPPON PRECISION CIRCUITS—6

SM588 × series

AC Analog Characteristics

256fs type specification (SM5883BS) : VSS = 0 V, VDD = 5 V, 16-bit input type,
crystal oscillator frequency f

= 11.2896 MHz, Ta = 25 °C

OSC

Parameter Symbol Condition

Total harmonic distor tion THD + N 1 kHz, 0 dB – 0.0035 0.0130 %

LSI output level V

Evaluation board output level V

Dynamic range D.R 1 kHz, −60 dB 90.4 96.4 – dB

Signal-to-noise ratio S/N 1 kHz, 0dB/ −∞ 92.8 98.8 – dB

Channel separation Ch. Sep 1 kHz, −∞ −0dB 87.5 93.5 – dB

Note: These parameters are measured using the measurement block diagram (page 8) and the measurement circuit (page 9).

OUT1

OUT2

1 kHz, 0 dB – 1.09 – V

1 kHz, 0 dB – 1.33 – V

min typ max

Rating

384fs type specification (SM5882AS, SM5883AS) : VSS = 0 V, VDD = 5 V, DEEM = 0 V (2-wire type),
16-bit input type, crystal oscillator frequency f

Parameter Symbol Condition

Total harmonic distor tion THD + N 1 kHz, 0 dB – 0.003 0.0120 %

LSI output level V

Evaluation board output level V

Dynamic range D.R 1 kHz, −60 dB 90.4 96.4 – dB

Signal-to-noise ratio S/N 1 kHz, 0dB/ −∞ 93.0 99.0 – dB

Channel separation Ch. Sep 1 kHz, −∞ −0dB 88.5 94.5 – dB

OUT1

OUT2

= 16.9344 MHz, Ta = 25 °C

OSC

Rating

min typ max

1 kHz, 0 dB – 1.09 – V

1 kHz, 0 dB – 1.33 – V

Unit

rms

rms

Unit

rms

rms

Note: These parameters are measured using the measurement block diagram (page 8) and the measurement circuit (page 9).

512fs type specification (SM5885CS) : VSS = 0 V, VDD = 5 V, 24-bit input type,
crystal oscillator frequency f

Parameter Symbol Condition

Total harmonic distor tion THD + N 1 kHz, 0 dB – 0.0035 0.0130 %

LSI output level V

Evaluation board output level V

Dynamic range D.R 1 kHz, −60 dB 92.0 98.0 – dB

Signal-to-noise ratio S/N 1 kHz, 0dB/ −∞ 92.8 98.8 – dB

Channel separation Ch. Sep 1 kHz, −∞ −0dB 87.5 93.5 – dB

Note: These parameters are measured using the measurement block diagram (page 8) and the measurement circuit (page 9).

= 22.5792MHz, Ta = 25 °C

OSC

OUT1

OUT2

1 kHz, 0 dB – 1.09 – V

1 kHz, 0 dB – 1.33 – V

Rating

min typ max

Unit

rms

rms

NIPPON PRECISION CIRCUITS—7

AC analog measurement block diagram

256fs/384fs

CLK

BCLK*

LRCK(fs)

fs= 44.1kHz

/512fs

SM588× series

Evaluation

Board

NF Corporation

CD Player

EVA. Filter3346A

*Not available for 2-wire type

Serial Interface Adaptor

corresponds to SIA-2322

DATA= 16/24bit

Left

Channel

100kΩ Input Impedance

Audio Precision System Two

corresponds to SYS-2322

Right
Channel

AC analog measurement conditions

Parameter

Total harmonic distor tion THD + N

Dynamic range D.R D-RANGE

Signal-to-noise ratio S/N Not used

Channel separation Ch. Sep Not used 20 kHz lowpass filter

1. Pins LO and RO should have an output load of 10 kΩ (min).

1

Symbol

OUT

3346A left/right-channel selector

switch

Not used

Audio Precision System Two audio

analyzer with built-in filter

20 kHz lowpass filter Output level V

22 kHz lowpass filter
A-WTD

NIPPON PRECISION CIRCUITS—8

AC analog measurement circuit

SM588× series

33k

68p

22k

L ch. OUT

100

+−

2.2u

1

8

−

NJM

2100

+

2

27k 33k

−+

−+

33u 33u

100p

100k

VCC

+

−

470u

VEE

R ch. OUT

100

2.2u

+−

100p

100k

0.1u

22k

7

−

NJM

685

27k 33k

−+

33u 33u

2100

+

−+

22k

−

+

33u

330p

33u

−

+

22k

3

−

+

68p

33k

33u

330p

0.01u

LO

DATA

SM5882/83/85

VSS

VDD

BCKI

/DEEM

LRCI

LRCI

DATA

BCKI/DEEM

CLK

RO

CLK

11

10

−+

X'tal

6

10p10p

1

100u

16.9344MHz(384fs)

2

3

VDD VSS

11.2896MHz(256fs)

22.5792MHz(512fs)

Ext. CLK

0.01u

13

14

12

3

7

4

9

8

56

0.01u

1M

74HCU04

1

2

5

Int. CLK

4

NIPPON PRECISION CIRCUITS—9

Theoretical Filter Characteristics

Overall characteristics

SM588× series

Parameter

Passband ripple 0 to 0.4535fs 0 to 20.0 kHz −0.05 – +0.05

Stopband attenuation 0.5465fs to 7.4535fs 24.1 to 328.7 kHz 32 – –

Built-in analog LPF compensation 0.4535fs 20.0 kHz – −0.34 –

Frequency band Attenuation (dB)

f @ fs = 44.1 kHz min typ max

Overall frequency characteristic

0

10

20

30

Gain(dB)

40

50

60

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0

(× fs)

Passband characteristic

0.0

0.2

0.4

Gain(dB)

0.6

0.8

0.000 0.125 0.250 0.375 0.500

0.4535

(× fs)

NIPPON PRECISION CIRCUITS—10

SM588× series

2-wire input, deemphasis ON overall characteristics

Parameter

Passband ripple 0 to 0.4535fs 0 to 20.0 kHz −0.09 – +0.23

Stopband attenuation 0.5465fs to 7.4535fs 24.1 to 328.7 kHz 36 – –

Built-in analog LPF compensation 0.4535fs 20.0 kHz – −0.34 –

Frequency band Attenuation (dB)

f @ fs = 44.1 kHz min typ max

Deemphasis ON overall frequency characteristic

0

10

20

30

Gain(dB)

40

50

60

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0

(× fs)

Deemphasis ON passband characteristic

0

2

4

6

Gain(dB)

8

10

12

0.000 0.125 0.250 0.375 0.500

0.4535

(× fs)

NIPPON PRECISION CIRCUITS—11

SM588× series

FUNCTIONAL DESCRIPTION

System Clock (CLK)

The system clock CLK frequency varies with device within the series as shown below, where fs is the input

frequency on LRCI.

Note that the input clock accuracy and signal-to-noise ratio greatly influence the AC analog characteristics.
The D/A converter operates at the speed shown in the following table.

Table 1. System clock

Device Master clock

A version 384fs 48fs

B, C version 256/512fs 32fs

DAC oversampling

operation

System Reset

The SM588× series devices incorporate a built-in power-ON reset circuit for system reset.

When power is applied, the internal arithmetic operation and output timing counter are reset, and then reset
again and timing synchronized to the external input on the next LRCI rising edge. After system reset, the out­puts are muted until the 9th rising of LRCI when output muting is released.

When the timing is reset, the PWM outputs may generate an output noise. An external muting circuit may be
required to prevent this output noise.

VDD

123 910

LRCI

Internal

Reset

LO

RO

Output Muted

Figure 1. System reset timing

NIPPON PRECISION CIRCUITS—12

SM588× series

Audio Data Input

Input data format (DATA)

The input data has a format that varies with device within the series, as shown below.

Table 2. Input format

Device Input length Format

SM5882/SM5883

SM5885

1. The 2-wire type supports bit clocks of 48fs (384fs) or 64fs (256fs/512fs) only.

2. The 3-wire type supports bit clocks of up to 64fs.

Input timing

3-wire input (DATA, LRCI, BCKI)

Serial data bits on DATA are read into the SIPO register (serial-to-parallel converter register) on the rising
edge of the bit clock BCKI, and then converted to parallel data.

The arithmetic operation and output timing are independent of the input timing. Accordingly, after a reset, as
long as the clock frequency ratio between LRCI and the system clock CLK is maintained, phase differences
between LRCI, BCKI and the system clock CLK do not affect the functional operation. Also, any jitter present
on the data input clock does not appear as output pulse jitter.

1

2

16 bits

24 bits

MSB first, bit serial, rear-packed,
2s complement

2-wire input (DATA, LRCI)

Serial data bits on DATA are read into the SIPO register (serial-to-parallel converter register) on the rising
edge of an internally generated bit clock, and then converted to parallel data.

Deemphasis Filter (DEEM: 2-wire input)

The 2-wire type with built-in digital deemphasis filter is designed to operate at 44.1 kHz. Deemphasis is ON
when DEEM is HIGH, and OFF when DEEM is LOW.

NIPPON PRECISION CIRCUITS—13

SM588× series

TIMING DIAGRAMS

2-wire Input Type with Deemphasis Filter Built-in

DATA

Internal bit clock

(Generated by system clock)

LRCI

3-wire Input Type

Left

Channel

MSB LSB

24 bit clock (384fs type)

32 bit clock (256fs/512fs type)

16 or 24 bit

1/fs

LSB

Right

Channel

MSB

16 or 24 bit

24 bit clock (384fs type)

32 bit clock (256fs/512fs type)

DATA

BCKI

(64fs MAX)

LRCI

Left

Channel

1/fs

16 or 24 bit

MSB LSB

Right

Channel

LSB

MSB

16 or 24 bit

NIPPON PRECISION CIRCUITS—14

SM588× series

TYPICAL APPLICATIONS

Input Interface Examples (fs = 44.1kHz)

16.9344MHz (384fs)

44.1kHz

3-wire input type

System clock 384fs

11.2896MHz (256fs)

44.1kHz

3-wire input type

System clock 256fs

X'tal

X'tal

LRCI

BCKI

DATA

LRCI

BCKI

DATA

CKI

SM5882/83/85

CKI

SM5882/83/85

16.9344MHz (384fs)

44.1kHz

2-wire input type

System clock 384fs

11.2896MHz (256fs)

44.1kHz

2-wire input type

System clock 256fs

X'tal

X'tal

LRCI

DATA

LRCI

DATA

CKI

SM5882/83/85

CKI

SM5882/83/85

22.5792MHz (512fs)

44.1kHz

3-wire input type

System clock 512fs

X'tal

LRCI

BCKI

DATA

CKI

SM5882/83/85

44.1kHz

2-wire input type

System clock 512fs

X'tal

22.5792MHz (512fs)

LRCI

DATA

CKI

Note that the output analog characteristics and other specifications are not guaranteed for a particular format or application circuit.

SM5882/83/85

NIPPON PRECISION CIRCUITS—15

SM588× series

NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to

improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility for

the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits

are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision

Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification.

The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or

malfunction of the products. Customers are requested to comply with applicable laws and regulations in effect now and hereinafter,

including compliance with export controls on the distribution or dissemination of the products. Customers shall not export, directly or

indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies.

NIPPON PRECISION CIRCUITS INC.

4-3, Fukuzumi 2-chome

Koto-ku, Tokyo 135-8430, Japan

Telephone: [phone]

NIPPON PRECISION CIRCUITS INC.

Facsimile: [phone]

http://www.npc.co.jp/

Email: sales

@npc.co.jp

NIPPON PRECISION CIRCUITS—16

NC9720GE 2000.11