Cirrus Logic CS4348 User Manual

PCM

Serial

Interface

Multibit

Modulator

Interpolation

Filter

Internal
Voltage

Reference

Switched

Capacitor

DAC and

Filter

Serial Audio

Input

Right
Output

Left
Output

Switched

Capacitor

DAC and

Filter

De-emphasis

Multibit

Modulator

Interpolation

Filter

3.3 V or 5 V

CS4344/5/8

10-Pin, 24-Bit, 192 kHz Stereo D/A Converter

Features

 Multi-bit Delta-Sigma Modulator

 24-bit Conversion

 Automatically Detects Sample Rates up to

192 kHz.

 105 dB Dynamic Range

 -90 dB THD+N

 Low Clock-Jitter Sensitivity

 Single +3.3 or +5 V Power Supply

 Filtered Line-Level Outputs

 On-chip Digital De-emphasis

 Popguard

 Small 10-pin TSSOP Package

®

Technology

Description

The CS4344 family members (CS4344, CS4345, and
CS4348) are complete, stereo digital-to-analog output
systems including interpolation, multibit D/A conversion
and output analog filtering in a 10-pin package. The
CS4344 family supports major audio data interface for­mats. Individual devices differ only in the supported
interface format.

The CS4344 family is based on a fourth-order multibit
delta-sigma modulator with a linear analog low-pass fil­ter. This family also includes autospeed mode detection
using both sample rate and master clock ratio as a
method of auto-selecting sampling rates between 2 kHz
and 200 kHz.

The CS4344 family contains on-chip digital deempha­sis, operates from a single +3.3 V or +5 V power supply,
and requires minimal support circuitry. These features
are ideal for DVD players & recorders, digital televi­sions, home theater and set top box products, and
automotive audio systems.

The CS4344 family is available in a 10-pin TSSOP
package in both Commercial (-10 to +85 °C) and Auto­motive grades (-40 to +85 °C). See Section 8. “Ordering

Information” on page 23 for complete details.

http://www.cirrus.com

Copyright  Cirrus Logic, Inc. 2013

(All Rights Reserved)

JUL ‘13

DS613F2

TABLE OF CONTENTS

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

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

SPECIFIED OPERATING CONDITIONS ............................................................................................... 5

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

DAC ANALOG CHARACTERISTICS .....................................................................................................6

DAC ANALOG CHARACTERISTICS - ALL MODES ............................................................................. 6

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

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

POWER AND 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 .................................................................................................................................. 15

4.4 Initialization and Power-Down ........................................................................................................ 15

4.5 Output Transient Control ................................................................................................................ 15

4.5.1 Power-Up .............................................................................................................................. 15

4.5.2 Power-Down .......................................................................................................................... 15

4.6 Grounding and Power Supply Decoupling ......................................................................................17

4.7 Analog Output and Filtering ............................................................................................................ 17

5. FILTER PLOTS ..................................................................................................................................... 18

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

7. PACKAGE DIMENSIONS .................................................................................................................... 22

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

8.1 Functional Compatibility ................................................................................................................. 23

8.2 Selection Guide .............................................................................................................................. 23

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

CS4344/5/8

2

CS4344/5/8

LIST OF FIGURES

Figure 1.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.Typical Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Figure 7.CS4344 Data Format (I2S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Figure 8.CS4345 Data Format (Left Justified) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Figure 9.CS4348 Data Format (Right Justified 16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 10.De-Emphasis Curve (Fs = 44.1kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Figure 11.CS4344/5/8 Initialization and Power-down Sequence . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 12.Single-Speed Stopband Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 13.Single-Speed Transition Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Figure 14.Single-Speed Transition Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Figure 15.Single-Speed Passband Ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Figure 16.Double-Speed Stopband Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Figure 17.Double-Speed Transition Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Figure 18.Double-Speed Transition Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

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

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

Figure 21.Quad-Speed Transition Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Figure 22.Quad-Speed Transition Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Figure 23.Quad-Speed Passband Ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

3

1. PIN DESCRIPTIONS

SDIN AOUTR

DEM

/SCLK VA

LRCK GND

MCLK AOUTL

VQ FILT+

1

2

3

4

5

6

7

8

9

10

Pin Name # Pin Description

SDIN 1 Serial Audio Data Input (Input) - Input for two’s complement serial audio data.

/SCLK

DEM

LRCK

MCLK 4 Master Clock (Input) - Clock source for the delta-sigma modulator and digital filters.

VQ 5 Quiescent Voltage (Output) - Filter connection for internal quiescent voltage.

FILT+

AOUTL

GND 8 Ground (Input) - ground reference.

VA 9 Analog Power (Input) - Positive power for the analog and digital sections.

AOUTR

2 De-Emphasis/External Serial Clock Input (Input) - used for deemphasis filter control or external serial

clock input.

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

data line.

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

circuits.

7 Left Channel Analog Output (Output) - The full scale analog output level is specified in the Analog Char-

acteristics specification table.

10 Right Channel Analog Output (Output) - The full scale analog output level is specified in the Analog

Characteristics specification table.

CS4344/5/8

4

CS4344/5/8

2. CHARACTERISTICS AND SPECIFICATIONS

(All Min/Max characteristics and specifications are guaranteed over the Specified Operating Conditions. Typical
performance characteristics and specifications are derived from measurements taken at nominal supply voltage
and T

= 25C.)

A

SPECIFIED OPERATING CONDITIONS

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

Parameters Symbol Min Nom Max Units

DC Power Supply VA 4.75

3.00

Specified Temperature Range -CZZ

-DZZ

T

A

-10

-40

5.0

3.3

5.25

3.47

-

-

+70
+85

V
V

C
C

ABSOLUTE MAXIMUM RATINGS

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

Parameters Symbol Min Max Units

DC Power Supply VA -0.3 6.0 V
Input Current, Any Pin Except Supplies I
Digital Input Voltage V
Ambient Operating Temperature (power applied) T
Storage Temperature T

in

IND

op

stg

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

is not guaranteed at these extremes.

-±10mA

-0.3 VA+0.4 V

-55 125 °C

-65 150 °C

5

CS4344/5/8

DAC ANALOG CHARACTERISTICS

(Full-Scale Output Sine Wave, 997 Hz (Note 1), Fs = 48/96/192 kHz; Test load RL = 3 k, CL = 10 pF (Figure 1).
Measurement Bandwidth 10 Hz to 20 kHz, unless otherwise specified.)

5V Nom 3.3V Nom

Parameter

Dynamic Performance for CS4344/5/8-CZZ (-10 to 70°C)

Dynamic Range 18 to 24-Bit A-weighted

unweighted

16-Bit A-weighted

unweighted

Total Harmonic Distortion + Noise

18 to 24-Bit 0 dB

-20 dB

-60 dB

16-Bit 0 dB

-20 dB

-60 dB

Dynamic Performance for CS4344/5-DZZ (-40 to 85°C)

Dynamic Range 18 to 24-Bit A-weighted

unweighted

16-Bit A-weighted

unweighted

Total Harmonic Distortion + Noise

18 to 24-Bit 0 dB

-20 dB

-60 dB

16-Bit 0 dB

-20 dB

-60 dB

Min Typ Max Min Typ Max Unit

99
96
90
87

-

-

-

-

-

-

95
92
86
83

-

-

-

-

-

-

105
102

96
93

-90

-82

-42

-90

-73

-33

105
102

96
93

-90

-82

-42

-90

-73

-33

-

-

-

-

-85

-76

-36

-84

-67

-27

-

-

-

-

-82

-72

-32

-82

-63

-23

97
94
90
87

93
90
86
83

103
100

96
93

-

-

-

-

-

-

-

-

-

-

-

-

-90

-80

-40

-90

-73

-33

103
100

96
93

-90

-80

-40

-90

-73

-33

-85

-74

-34

-84

-67

-27

-82

-70

-30

-82

-63

-23

-

-

-

-

-

-

-

-

dB
dB
dB
dB

dB
dB
dB
dB
dB
dB

dB
dB
dB
dB

dB
dB
dB
dB
dB
dB

Notes:

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

DAC ANALOG CHARACTERISTICS - ALL MODES

Parameter Symbol Min Typ Max Unit

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

Max AC-Load Resistance (see Figure 2 on page 8)R

Max Load Capacitance (see Figure 2 on page 8)C

Output Impedance Z

Q

OUTmax

Qmax

L

L

OUT

6

-0.5•VA-VDC

-10-A

- 100 - A

-3-k

- 100 - pF

- 100 - 

CS4344/5/8

COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE

(The filter characteristics have been normalized to the sample rate (Fs) and can be referenced to the desired sam­ple rate by multiplying the given characteristic by Fs.) See

Parameter Symbol Min Typ Max Unit

Combined Digital and On-chip Analog Filter Response—Single-Speed Mode

(Note 6)

Passband (Note 2) to -0.1 dB corner

to -3 dB corner

Frequency Response 10 Hz to 20 kHz -.175 - +.01 dB

StopBand .5465 - - Fs

StopBand Attenuation (Note 3) 50 - - dB

Group Delay tgd - 10/Fs - s

De-emphasis Error (Note 5) Fs = 32 kHz

Fs = 44.1 kHz

Fs = 48 kHz

0
0

-

-

-

-

-

-

-

-

.35

.4992

+1.5/+0

+.05/-.25

-.2/-.4

Fs
Fs

dB
dB
dB

Combined Digital and On-chip Analog Filter Response—Double-Speed Mode

Passband (Note 2) to +0.1 dB corner

to -3 dB corner

Frequency Response 10 Hz to 20 kHz -.15 - +.15 dB

StopBand .5770 - - Fs

StopBand Attenuation (Note 3) 55 - - dB

Group Delay tgd - 5/Fs - s

0
0

-

-

.22

.501

Fs
Fs

Combined Digital and On-chip Analog Filter Response—Quad-Speed Mode

Passband (Note 2) to -0.1 dB corner

to -3 dB corner

Frequency Response 10 Hz to 20 kHz -.12 - +0 dB

StopBand 0.7 - - Fs

StopBand Attenuation (Note 3) 51 - - dB

Group Delay tgd - 2.5/Fs - s

0
0

-

-

0.110

0.469

Fs
Fs

Notes:

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. Refer to Figure 2.

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

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

7

CS4344/5/8

AOUTx

AGND

3.3 µF

V

out

R

L

C

L

100

50

75

25

2.5

51015

Safe Operating

Region

Capacitive Load -- C (pF)

L

Resistive Load -- R (k)

L

125

3

20

DIGITAL INPUT CHARACTERISTICS

Parameters Symbol Min Typ Max Units

High-Level Input Voltage (% of VA) V
Low-Level Input Voltage (% of VA) V
Input Leakage Current (Note 7) I

IH

IL

in

Input Capacitance - 8 - pF

60% - - V

- - 30% V

--±10A

7. Iin for LRCK is ±20 A max.

POWER AND THERMAL CHARACTERISTICS

5 V Nom 3.3 V Nom

Parameters Symbol Min Typ Max Min Typ Max Units

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 8) (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. Variance between 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 3.

I

A

I

A

JA

PSRR -

-

-

-

-

22

220
110

1.1

30

-

150

-

-

-

-

-

16

100

53

0.33

21

-

69

-

-95- -95-°C/Watt
50

-

40

-

-

as shown in the typical connection di-

-

-

50
40

-

-

mA

A

mW
mW

dB
dB

Figure 1. Output Test Load

8

Figure 2. Maximum Loading