Cirrus Logic CS4361 User Manual

Internal Voltage

Reference

Auto-Speed
Detecting PCM
Serial Interface

Level Translator

Mode Control

Analog & Digital Core

Supply (5 V)

Single-Ended

Outputs

(Six Channels

6

PCM Serial
Audio Input

Digital
Filters

Switch-Cap

DAC and

Analog Filters

Multi-bit
Modulators

External Mu te

Control

Mute Control

Serial Audio Port & Control

Supply (1.8 V to 5 V)

6

Digital

De-emphasis

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CS4361

20-Pin, 24-Bit, 192 kHz, 6-Channel D/A Converter

Features

 Multi-Bit Delta-Sigma Modulator
 24-Bit Conversion
 Automatically Detects Sample Rates Up To

192 kHz

 103 dB Dynamic Range
 -94 dB THD+N
 Low Clock-Jitter Sensitivity
 +5 V Core Power
 +1.8 V to +5 V Interface Power
 Filtered Line-Level Outputs
 On-Chip Digital De-emphasis
 Popguard
 Mute Output Control
 Small 20-pin TSSOP Package

®

Technology

Description

The CS4361 is a complete 6-channel digital-to-analog
output system including interpolation, multi-bit D/A con­version, and output analog filtering in a small 20-pin
package. The CS4361 supports all major audio data in­terface formats.

The CS4361 is based on a fourth-order, multi-bit, delta­sigma modulator with a linear analog low-pass filter.
This device also includes auto-speed mode detection
using both sample rate and master clock ratio as a
method of auto-selecting sampling rates between 2 kHz
and 216 kHz.

The CS4361 contains on-chip digital de-emphasis, op­erates from a single +5 V power supply with separate
built-in level shifter for the digital interface, and requires
minimal support circuitry. These features are ideal for
DVD players and recorders, digital televisions, home
theater and set-top box products, and automotive audio
systems.

The CS4361 is available in a 20-pin TSSOP Commer­cial grade package (-40 to 85° C). The CDB4361 is also
available for device evaluation and implementation su g­gestions. Please refer to “Ordering Information” on

page 23 for complete ordering information.

http://www.cirrus.com

Copyright  Cirrus Logic, Inc. 2011

(All Rights Reserved)

SEPT '11
DS672F2

Confidential Draft

TABLE OF CONTENTS

1. PIN DESCRIPTIONS .............................................................................................................................. 4

2. CHARACTERISTICS AND SPECIFICATIONS ...................................................................................... 5

RECOMMENDED OPERATING CONDITIONS .................................................................................... 5

ABSOLUTE MAXIMUM RATINGS ........................................................................................................ 5

DAC ANALOG CHARACTERISTICS - COMMERCIAL (-CZZ) ............................................................. 6

COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE ........................................ 7

DIGITAL INPUT CHARACTERISTICS ....................................... ... ... ... ... .... ... ... ... .... ... ... ........................8

POWER & THERMAL CHARACTERISTICS ......................................................................................... 8

SWITCHING CHARACTERISTICS - SERIAL AUDIO INTERFACE ...................................................... 9

3. TYPICAL CONNECTION DIAGRAM ................................................................................................... 11

4. APPLICATIONS ................................................................................................................................... 12

4.1 Master Clock .................................................................................................................................. 12

4.2 Serial Clock .................................................................................................................................... 12

4.2.1 External Serial Clock Mode ................................................................................................... 12

4.2.2 Internal Serial Clock Mode ................. ...................................................................................12

4.3 De-Emphasis ................................................................................................................................. 14

4.4 Mode Select ................................................................................................................................... 14

4.5 Initialization and Power-Down ........................................................................................................ 15

4.6 Output Transient Control ................................................................................................................ 16

4.6.1 Power-Up ................................................................. .... ...................................... ... ................ 16

4.6.2 Power-Down ................................ ... .... ... ... ....................................... ... ... .... ... ......................... 16

4.7 Grounding and Power Supply Decoupling ..................................................................................... 16

4.8 Analog Output and Filtering ........................................................................................................... 16

4.9 Mute Control .................................................................................................................................. 17

5. PERFORMANCE PLOTS ..................................................................................................................... 18

6. PARAMETER DEFINITIONS ................................................................................................................ 21

7. PACKAGE INFORMATION .................................................................................................................. 22

8. ORDERING INFORMATION ................................................................................................................ 23

9. REVISION HISTORY ............................................................................................................................ 24

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LIST OF FIGURES

Figure 1.Equivalent Output Test Load ................................... ... .......................................... ... ... .................. 8

Figure 2.Maximum Loading .......................... ... ... .... ... ... ... .... ...................................... .... ... ... ... ..................... 8

Figure 3.External Serial Mode Input Timing .............................................................................................. 10

Figure 4.Internal Serial Mode Input Timing ............................................................................................... 10

Figure 5. Internal Serial Clock Generation ...... .......................................................................................... 10

Figure 6.Recommended Connection Diagram .......................................................................................... 11

Figure 7.CS4361 Data Format (I²S) ... .... ... ... ... ... .... ... ... .......................................... ... ................................ 13

Figure 8.CS4361 Data Format (Left-Justified) .......................................................................................... 13

Figure 9.CS4361 Data Format (Right-Justified 24) ................................... ... .... ... ... ... .... ... ... ... ... .... ... ... ...... 13

Figure 10.CS4361 Data Format (Right-Justified 16) ................................................................................. 14

Figure 11.De-Emphasis Curve (Fs = 44.1kHz) ......................................................................................... 14

Figure 12.CS4361 Initialization and Power-Down Sequence ................................................................... 15

Figure 13.Suggested Active-Low Mute Circuit .......................................................................................... 17

Figure 14.Single-Speed Stopband Rejection ............................................................................................ 18

Figure 15.Single-Speed Transition Band .................................................................................................. 18

Figure 16.Single-Speed Transition Band .................................................................................................. 18

Figure 17.Single-Speed Passband Ripple ...................... .... ... ... ... .... ... ... ... ... .... ... ... ................................... 18

Figure 18.Double-Speed Stopband Rejection .............................. .... ... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ......... 19

Figure 19.Double-Speed Transition Band ................................................................................................. 19

Figure 20.Double-Speed Transition Band ................................................................................................. 19

Figure 21.Double-Speed Passband Ripple .................................. .......................................... ................... 19

Figure 22.Quad-Speed Stopband Rejection ............................................................................................. 20

Figure 23.Quad-Speed Transition Band ...................................... .... ... ... ... ... .... ... ... ... .... ... ... ... ................... 20

Figure 24.Quad-Speed Transition Band ...................................... .... ... ... ... ... .... ... ... ... .... ... ... ... ................... 20

Figure 25.Quad-Speed Passband Ripple ................................................................................................. 20

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CS4361

LIST OF TABLES

Table 1. Common Clock Frequencies ....................................................................................................... 12

Table 2. Mode Pin Settings ....................................................................................................................... 14

3

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1
2
3
4
5

16
6
7
8

15

14

13

12
11

9
10

17

18

19

20

MUTEC

VL

AOUT1

SDIN1

AOUT2

SDIN2

AOUT3

SDIN3

AOUT4

DEM

/SCLK

VA

LRCK

GND

MCLK

AOUT5

RST

AOUT6

MODE

VQ

FILT+

1. PIN DESCRIPTIONS

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CS4361

Pin Name # Pin Description

SDIN1
SDIN2
SDIN3

DEM

/SCLK 5

LRCK 6
MCLK 7 Master Clock (Input) - Clock source for the delta-sigma modulator and digital filters.

VQ 11 Quiescent Voltage (Output) - Filter connection for internal quiescent voltage.
FILT+ 10
AOUT1

AOUT2
AOUT3
AOUT4
AOUT5
AOUT6

GND 14 Ground (Input) - ground reference.
VA 15 Analog Power (Input) - Positive power for the analog and core digital sections.
VL 1 Interface Power (Input) - Positive power for the digital interface level shifters.
RST
MUTEC 20 Mute Control (Output) - Control signal for optional external muting circuitry.
MODE 9 Mode Control (Input) - Selects operational modes (see Table 2).

4

2
34Serial Audio Data Input (Input) - Input for two’s complement serial audio data.

De-emphasis/External Serial Clock Input (Input) - used for de-emphasis filter control or external serial
clock input.

Left Right Clock (Input) - Determines which channel, Left or Right, is currently active on the serial
audio data line.

Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling
circuits.

19
18
17
16
13
12

Analog Output (Output) - The full scale analog output level is specified in the Analog Characteristics
specification table.

8 Reset (Input) - Applies reset to the internal circuitry when low.

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CS4361

2. CHARACTERISTICS AND SPECIFICATIONS

RECOMMENDED OPERATING CONDITIONS

AGND = 0 V; all voltages with respect to ground.

Parameters Symbol Min Nom Max Units

DC Power Supply
Specified Temperature Range Commercial T

VA
VL

A

4.75

1.7

-40 - +85 C

5.0

3.3

5.25

5.25

V
V

ABSOLUTE MAXIMUM RATINGS

AGND = 0 V; all voltages with respect to ground.

Parameters Symbol Min Max Units

DC Power Supply
Input Current, Any Pin Except Supplies I

Digital Input V oltage (pin 8, RST
Digital Input V oltage (all other digital pins) V
Ambient Operating Temperature (power applied) T
Storag e Temperature T

WARNING:Operation at or beyond these limits may result in permanent damage to the device. Normal operation

is not guaranteed at these extremes.

)V

VA
VL

in

IND
IND

op

stg

-0.3

-0.3

-±10mA

-0.3 VA+0.4 V

-0.3 VL+0.4 V

-55 125 °C

-65 150 °C

6.0
VA

V
V

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CS4361

DAC ANALOG CHARACTERISTICS - COMMERCIAL

Test Conditions (unless otherwise specified). VA = 5.0 V, VL = 3.3 V, and TA = 25° C. Full-scale input sine wave.
Measurement Bandwidth is 10 Hz to 20 kHz. See (Note 1). Specifications apply to all channels unless otherwise

indicated.

Parameter Min Typ Max Unit

Dynamic Performance

Dynamic Range 18 to 24-Bit A-weighted

unweighted

16-Bit A-weighted

unweighted

99
96
90
87

103
100

96
93

-

-

-

-

Total Harmonic Distortion + Noise

18 to 24-Bit Ch. 1-2, 0 dB

Ch. 3-4, 0 dB
Ch. 5-6, 0 dB

-20 dB

-60 dB

16-Bit Ch. 1-2, 0 dB

Ch. 3-4, 0 dB
Ch. 5-6, 0 dB

-20 dB

-60 dB

-

-

-

-

-

-

-

-

-

-

-93

-90

-94

-80

-40

-92

-89

-93

-73

-33

-86

-83

-87

-76

-36

-85

-82

-86

-67

-27

DAC Analog Characteristics - All Modes

Parameter Symbol Min Typ Max

Interchannel Isolation (1 kHz) - 100 - dB

DC Accuracy

Interchannel Gain Mismatch - 0.1 0.25 dB
Gain Drift - 100 - ppm/°C

Analog Output

Full Scale Output Voltage 0.60•VA 0.65•VA 0.70•VA Vpp
Quiescent Voltage V

Max DC Current draw from an AOUT pin I
Max Current draw from VQ I
Min AC-Load Resistance (see Figure 2)R
Max Load Capacitance (see Figure 2)C
Output Impedance Z

Q

OUTmax

Qmax

L
L

OUT

-0.5•VA-VDC

-10-A

- 100 - A

-3-k

- 100 - pF

- 100 - 

dB
dB
dB
dB

dB
dB
dB
dB
dB
dB
dB
dB
dB
dB

Notes:

6

1. One LSB of triangular PDF dither added to data.

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CS4361

COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE

The filter characteristics have been norma lized to th e sample rate (Fs) and can be referenced to the desired sam­ple rate by multiplying the given characteristic by Fs. (See Note 5)

Parameter Symbol Min Typ Max Unit

Single-Speed Mode

Passband (Note 2) to -0.05 dB corner

to -3 dB corner
Frequency Response 10 Hz to 20 kHz -.01 - +.08 dB
StopBand .5465 - - Fs
StopBand Attenuation (Note 3) 50 - - dB
Group Delay tgd - 1 0/Fs - s
De-emphasis Error (Note 4) Fs = 44.1 kHz - - +.05/-.25 dB

Double-Speed Mode

Passband (Note 2) to -0.1 dB corner

to -3 dB corner
Frequency Response 10 Hz to 20 kHz -.05 - +.2 dB
StopBand .5770 - - Fs
StopBand Attenuation (Note 3) 55 - - dB
Group Delay tgd - 5 /F s - s

Quad-Speed Mode

Passband (Note 2) to -0.1 dB corner

to -3 dB corner
Frequency Response 10 Hz to 20 kHz 0 - +0.00004 dB
StopBand 0.7 - - Fs
StopBand Attenuation (Note 3) 51 - - dB
Group Delay tgd - 2.5/Fs - s

0
0

0
0

0
0

-

-

-

-

-

-

.4780
.4996

.4650
.4982

0.397

0.476

Fs
Fs

Fs
Fs

Fs
Fs

2. Response is clock-dependent and will scale with Fs.

3. For Single-Speed Mode, the measurement bandwidth is 0.5465 Fs to 3 Fs.
For Double-Speed Mode, the measurement bandwidth is 0.577 Fs to 1.4 Fs.
For Quad-Speed Mode, the measurement bandwidth is 0.7 Fs to 1 Fs.

4. De-emphasis is available only in Single-Speed Mode.

5. Amplitude vs. Frequency plots of this data are available in “Performance Plots” on page 18.

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AOUTx

AGND

3.3 µF

V

out

R

L

C

L

Figure 1. Equivalent Output Test Load Figure 2. Maximum Loading

100

50

75

25

2.5

51015

Safe Operating

Region

Capacitive Load -- C (pF)

L

Resistive Load -- R (k)

L

125

3

20

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CS4361

DIGITAL INPUT CHARACTERISTICS

Parameters Symbol Min Typ Max Units

High-Level Input Voltage -all input Pins except RST (% of VL) V
Low-Level Input Voltage -all input Pins except RST (% of VL) V
High-Level Input Voltage -RST pin (Note 6) (% of VL) V
Low-Level Input Voltage -RST pin (% of VL) V
Input Leakage Current (Note 7) I

IH
IL
IH
IL

in

70% - - V

- - 30% V

90% - - V

- - 10% V

--±10A

Input Capacitance - 8 - pF

6. RST pin has an input threshold relative to VL, but is VA tolerant.

7. I

for LRCK is ±20 A max.

in

POWER & THERMAL CHARACTERISTICS

Parameters Symbol

Power Supplies

Power Supply Current normal operation

(Note 8)

power-down state (Note 9)

Power Dissipation normal operation

power-down state (Note 9)
Package Thermal Resistance 
Power Supply Rejection Ratio (Note 10) (1 kHz)

(60 Hz)

8. Current consumption increases with increasing FS and increasing MCLK. Typ and Max values are
based on highest FS and highest MCLK. Current variance betwee n speed modes is small.

9. Power-Down Mode is defined when all clock and data lines are held static.

10. Valid with the recommended capacitor values on VQ and FILT+
agram in Section 4.

Min Typ Max

I

A

I

L

I

A

I

L

JA

PSRR -

-

-

-

-

-

-

-72-°C/Watt

-

as shown in the typical connection di-

5V Nom

66

0.1

300

26

331

1.63

60
40

90

1

-

-

455

-

-

-

Units

mW
mW

mA
mA

A
A

dB
dB

8