CS4341A
24-Bit, 192 kHz Stereo DAC with Volume Control
Features
Description
z 101
The CS4341A is a complete stereo digital-to-analog system including digital interpolation, fourth-order deltasigma digital-to-analog conversion, digital de-emphasis,
volume control, channel mixing and analog filtering. The
advantages of this architecture include: ideal differential
linearity, no distortion mechanisms due to resistor
matching errors, no linearity drift over time and temperature and a high tolerance to clock jitter.
dB Dynamic Range
z -91 dB THD+N
z +3.3 V or +5 V Power Supply
z 50 mW with 3.3 V supply
z Low Clock Jitter Sensitivity
z Filtered Line-level Outputs
z On-Chip Digital De-emphasis for 32, 44.1,
and 48 kHz
z ATAPI Mixing
z Digital Volume Control with Soft Ramp
The CS4341A accepts data at all standard audio sample
rates up to 192 kHz, consumes very little power, operates over a wide power supply range and is pin
compatible with the CS4341, as described in section 3.1.
These features are ideal for DVD audio players.
– 94 dB Attenuation
– 1 dB Step Size
– Zero Crossing Click-Free Transitions
z Up
to 200-kHz Sample Rates
z Automatic Mode Detection for Sample Rates
between 4 and 200 kHz
z Pin Compatible with the CS4341
SC L/CCLK
SDA/CDIN
AD 0/C S
Control Port
Interface
RST
SDIN
Serial Audio
Interface
LRCK
M UTEC
External
Mute Control
Interpolation Filter
SCLK
ORDERING INFORMATION
CS4341A-KS
16-pin SOIC, -10 to 70 °C
CS4341A-KSZ, Lead Free 16-pin SOIC, -10 to 70 °C
CDB4341A
Evaluation Board
Volume Control
∆ Σ DAC
Analog Filter
AO UTA
∆ Σ DAC
Analog Filter
AO UTB
Mixer
Interpolation Filter
Volume Control
÷2
MCLK
Cirrus Logic, Inc.
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2004
(All Rights Reserved)
JUL ‘04
DS582F2
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CS4341A
TABLE OF CONTENTS
1. PIN DESCRIPTION ................................................................................................................... 5
2. TYPICAL CONNECTION DIAGRAM ...................................................................................... 6
3. APPLICATIONS ........................................................................................................................ 7
3.1 Upgrading from the CS4341 to the CS4341A .................................................................... 7
3.2 Sample Rate Range/Operational Mode Detect .................................................................. 7
3.2.1 Auto-Detect Enabled ............................................................................................. 7
3.2.2 Auto-Detect Disabled ............................................................................................ 7
3.3 System Clocking ................................................................................................................ 8
3.4 Digital Interface Format ...................................................................................................... 8
3.5 De-Emphasis Control ......................................................................................................... 9
3.6 Recommended Power-up Sequence ................................................................................. 9
3.7 Popguard® Transient Control ........................................................................................... 10
3.7.1 Power-up ............................................................................................................. 10
3.7.2 Power-down ........................................................................................................ 10
3.7.3 Discharge Time ................................................................................................... 10
3.8 Grounding and Power Supply Arrangements .................................................................. 10
3.9 Control Port Interface ....................................................................................................... 11
3.9.1 Rise Time for Control Port Clock ......................................................................... 11
3.9.2 MAP Auto Increment ........................................................................................... 11
3.9.3 I2C Mode ............................................................................................................. 12
3.9.3a I2C Write ............................................................................................... 12
3.9.3b I2C Read .............................................................................................. 13
3.9.4 SPI Mode ............................................................................................................ 14
3.9.4a SPI Write .............................................................................................. 14
3.10 Memory Address Pointer (MAP)
.............................................................................. 15
Contacting Cirrus Logic Support
For all product questions and inquiries contact a Cirrus Logic Sales Representative.
To find one nearest you go to www.cirrus.com
IMPORTANT NOTICE
"Preliminary" product information describes products that are in production, but for which full characterization data is not yet available. Cirrus Logic, Inc. and its
subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is
provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders,
that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment,
including those pertaining to warranty, patent infringement, and limitation of liability. No responsibility is assumed by Cirrus for the use of this information, including use of
this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. This document is the property of Cirrus and
by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual
property rights. Cirrus owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within
your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent does not extend to other copying such as copying for general distribution,
advertising or promotional purposes, or for creating any work for resale.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE
PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED
FOR USE IN AIRCRAFT SYSTEMS, MILITARY APPLICATIONS, PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, LIFE SUPPORT PRODUCTS
OR OTHER CRITICAL APPLICATIONS (INCLUDING MEDICAL DEVICES, AIRCRAFT SYSTEMS OR COMPONENTS AND PERSONAL OR AUTOMOTIVE
SAFETY OR SECURITY DEVICES). INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF
THE CUSTOMER OR CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER
AGREES, BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM
ANY AND ALL LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES.
Purchase of I2C components of Cirrus Logic, Inc., or one of its sublicensed Associated Companies conveys a license under the Phillips I2C Patent Rights to use
those components in a standard I2C system.
Cirrus Logic, Cirrus, and the Cirrus Logic logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks or service marks of their respective owners.
2
DS582F2
CS4341A
3.10.1 INCR (Auto Map Increment Enable) ............................................................................ 15
3.10.2 MAP (Memory Address Pointer) .................................................................................. 15
4. REGISTER QUICK REFERENCE .......................................................................................... 16
5. REGISTER DESCRIPTION .................................................................................................... 17
5.1 Mode Control 1 (address 00h) .......................................................................................... 17
5.2 Mode Control 2 (address 01h) .......................................................................................... 17
5.3 Transition and Mixing Control (address 02h).................................................................... 19
5.4 Channel A Volume Control (address 03h) ........................................................................ 22
5.5 Channel B Volume Control (address 04h) ........................................................................ 22
6. CHARACTERISTICS AND SPECIFICATIONS ...................................................................... 23
SPECIFIED OPERATING CONDITIONS ............................................................................. 23
ABSOLUTE MAXIMUM RATINGS ......................................................................................... 23
ANALOG CHARACTERISTICS (CS4341A-KS) ..................................................................... 24
COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE ........................ 26
SWITCHING SPECIFICATIONS - SERIAL AUDIO INTERFACE .......................................... 29
SWITCHING SPECIFICATIONS - CONTROL PORT INTERFACE ....................................... 30
SWITCHING SPECIFICATIONS - CONTROL PORT INTERFACE ....................................... 31
DC ELECTRICAL CHARACTERISTICS ................................................................................ 32
DIGITAL INPUT CHARACTERISTICS ................................................................................... 32
DIGITAL INTERFACE SPECIFICATIONS ............................................................................. 32
7. PARAMETER DEFINITIONS .................................................................................................. 33
Total Harmonic Distortion + Noise (THD+N) .......................................................................... 33
Dynamic Range ...................................................................................................................... 33
Interchannel Isolation ............................................................................................................. 33
Interchannel Gain Mismatch ................................................................................................... 33
Gain Error ............................................................................................................................... 33
Gain Drift ................................................................................................................................ 33
8. REFERENCES ........................................................................................................................ 33
9. PACKAGE DIMENSIONS ...................................................................................................... 34
THERMAL CHARACTERISTICS AND SPECIFICATIONS .................................................... 34
DS582F2
3
CS4341A
LIST OF FIGURES
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Typical Connection Diagram .......................................................................................... 6
I2S Data .......................................................................................................................... 8
Left Justified up to 24-Bit Data ....................................................................................... 9
Right Justified Data ........................................................................................................ 9
De-Emphasis Curve ....................................................................................................... 9
I2C Buffer Example ...................................................................................................... 11
Control Port Timing, I2C Mode ..................................................................................... 13
Control Port Timing, SPI mode .................................................................................... 14
ATAPI Block Diagram .................................................................................................. 21
Output Test Load ......................................................................................................... 25
Maximum Loading ........................................................................................................ 25
Single-Speed Stopband Rejection ............................................................................... 27
Single-Speed Transition Band ..................................................................................... 27
Single-Speed Transition Band (Detail) ......................................................................... 27
Single-Speed Passband Ripple ................................................................................... 27
Double-Speed Stopband Rejection .............................................................................. 27
Double-Speed Transition Band .................................................................................... 27
Double-Speed Transition Band (Detail) ....................................................................... 28
Double-Speed Passband Ripple .................................................................................. 28
Serial Input Timing ....................................................................................................... 29
Control Port Timing - I2C Mode .................................................................................... 30
Control Port Timing - SPI Mode ................................................................................... 31
LIST OF TABLES
Table 1. CS4341A Auto-Detect .......................................................................................................... 7
Table 2. CS4341A Mode Select ......................................................................................................... 7
Table 3. Single-Speed Mode Standard Frequencies.......................................................................... 8
Table 4. Double-Speed Mode Standard Frequencies ........................................................................ 8
Table 5. Quad-Speed Mode Standard Frequencies........................................................................... 8
Table 6. Digital Interface Format ...................................................................................................... 18
Table 7. ATAPI Decode.................................................................................................................... 20
Table 8. Example Digital Volume Settings ....................................................................................... 22
4
DS582F2
CS4341A
1.
PIN DESCRIPTION
RST
1
16
MUTEC
SDIN
2
15
AOUTA
SCLK
3
14
VA
LRCK
4
13
AGND
MCLK
5
12
AOUTB
SCL/CCLK
6
11
REF_GND
SDA/CDIN
7
10
VQ
AD0/CS
8
9
FILT+
Pin Name
#
Pin Description
RST
1
Reset (Input) - Powers down device when enabled.
SDIN
2
Serial Audio Data (Input) - Input for two’s complement serial audio data.
SCLK
3
Serial Clock (Input) -Serial clock for the serial audio interface.
LRCK
4
Left Right Clock (Input) - Determines which channel, Left or Right, is currently active on the
serial audio data line.
MCLK
5
Master Clock (Input) - Clock source for the delta-sigma modulator and digital filters.
SCL/CCLK
6
Serial Control Port Clock (Input) - Serial clock for the control port interface.
SDA/CDIN
7
Serial Control Data I/O (Input/Output) - Input/Output for I2C data. Input for SPI data.
AD0/CS
8
Address Bit / Chip Select (Input) - Chip address bit in I2C Mode. Control signal used to select
the chip in SPI mode.
FILT+
9
Positive Voltage Reference (Output) - Positive voltage reference for the internal sampling circuits.
VQ
10
Quiescent Voltage (Output) - Filter connection for internal quiescent reference voltage.
REF_GND
11
Reference Ground (Input) - Ground reference for the internal sampling circuits.
AOUTR
AOUTL
12
15
Analog Outputs (Output) - The full scale analog output level is specified in the Analog Characteristics table.
AGND
13
Analog Ground (Input) - Ground reference.
VA
14
Power (Input) - Positive power for the analog, digital, control port interface, and serial audio
interface sections.
MUTEC
16
Mute Control (Output) - Control signal for optional mute circuit.
DS582F2
5
CS4341A
2.
TYPICAL CONNECTION DIAGRAM
+3.3V or +5.0V
+
0.1 µF
14
1 µF
VA
2
Serial Audio
Data
Processor
3
4
SDIN
3.3 µF
SCLK
AO UTA
560 Ω
Audio
O utput A
15
+
LRCK
C
10 k Ω
RL
CS4341A
External Clock
5
MUTEC 16
M CLK
FILT+
VQ
6
7
MicroControlled
Configuration
8
SCL/CCLK
REF_GND
OPTIO NAL
MUTE
CIRCUIT
9
+
10
.1 µF + 1 µF
AO UTB
AD0/CS
1
12
560 Ω
Audio
O utput B
+
10 k Ω
RST
1 µF
11
3.3 µF
SDA/CDIN
0.1 µF
C
RL
AG ND
13
C=
R L + 560
4 π Fs(R L 560)
Figure 1. Typical Connection Diagram
6
DS582F2
CS4341A
3. APPLICATIONS
3.1
Upgrading from the CS4341 to the CS4341A
The CS4341A is pin and functionally compatible with all CS4341 designs, operating at the standard audio
sample rates, that use pin 3 as a serial clock input. In addition to the features of the CS4341, the CS4341A
supports standard sample rates up to 192 kHz, as well as automatic mode detection for sample rates between 4 and 200 kHz. The automatic speed mode detection feature allows sample rate changes between
single, double and quad-speed modes without external intervention.
The CS4341A does not support an internal serial clock mode, sample rates between 50 kHz and 84 kHz
(unless otherwise stated), or 2.7 V operation as does the CS4341.
3.2
Sample Rate Range/Operational Mode Detect
The device operates in one of three operational modes. The allowed sample rate range in each mode will
depend on whether the Auto-Detect Defeat bit is enabled/disabled.
3.2.1
Auto-Detect Enabled
The Auto-Detect feature is enabled by default in the control port register 5.1. In this state, the
CS4341A will auto-detect the correct mode when the input sample rate (Fs), defined by the LRCK
frequency, falls within one of the ranges illustrated in Table 1. Sample rates outside the specified
range for each mode are not supported.
Input Sample Rate (FS)
4 kHz - 50 kHz
84 kHz - 100 kHz
170 kHz - 200 kHz
MODE
Single Speed Mode
Double Speed Mode
Quad Speed Mode
Table 1. CS4341A Auto-Detect
3.2.2
Auto-Detect Disabled
The Auto-Detect feature can be defeated via the control port register 5.1. In this state, the CS4341A
will not auto-detect the correct mode based on the input sample rate (Fs). The operational mode
must be set appropriately if Fs falls within one of the ranges illustrated in Table 2. Please refer to
section 5.1.1 for implementation details. Sample rates outside the specified range for each mode
are not supported.
MC1
0
0
1
MC0
0
1
0
Input Sample Rate (FS)
4 kHz - 50 kHz
50 kHz - 100 kHz
100 kHz - 200 kHz
MODE
Single Speed Mode
Double Speed Mode
Quad Speed Mode
Table 2. CS4341A Mode Select
DS582F2
7
CS4341A
3.3
System Clocking
The device requires external generation of the master (MCLK), left/right (LRCK) and serial (SCLK)
clocks. The LRCK, defined also as the input sample rate (Fs), must be synchronously derived from the
MCLK according to specified ratios. The specified ratios of MCLK to LRCK for each Speed Mode, along
with several standard audio sample rates and the required MCLK frequency, are illustrated in Tables 3-5.
Sample Rate
(kHz)
32
44.1
48
256x
8.1920
11.2896
12.2880
384x
12.2880
16.9344
18.4320
MCLK (MHz)
512x
16.3840
22.5792
24.5760
768x
24.5760
33.8688
36.8640
1024x*
32.7680
45.1584
49.1520
Table 3. Single-Speed Mode Standard Frequencies
Sample Rate
(kHz)
64
88.2
96
128x
8.1920
11.2896
12.2880
192x
12.2880
16.9344
18.4320
MCLK (MHz)
256x
16.3840
22.5792
24.5760
384x
24.5760
33.8688
36.8640
512x*
32.7680
45.1584
49.1520
Table 4. Double-Speed Mode Standard Frequencies
Sample Rate
(kHz)
MCLK (MHz)
192x
33.8688
36.8640
128x
22.5792
24.5760
176.4
192
256x*
45.1584
49.1520
Table 5. Quad-Speed Mode Standard Frequencies
* Requires MCLKDIV bit = 1 in the Mode Control 1 register (address 00h).
3.4
Digital Interface Format
The device will accept audio samples in several digital interface formats. The desired format is selected
via the DIF0, DIF1 and DIF2 bits in the Mode Control 2 register (see section 5.2.2) . For an illustration of
the required relationship between LRCK, SCLK and SDIN, see Figures 2-4.
L e ft C h a n n e l
LR C K
R ig h t C h a n n e l
SCLK
S D IN
M SB
-1 -2 -3 -4 -5
+5 +4 +3 +2 +1
LSB
M SB
-1 -2 -3 -4
+5 +4 +3 +2 +1
LSB
Figure 2. I2S Data
8
DS582F2
CS4341A
L e ft C h a n n e l
LR C K
R ig h t C h a n n e l
SCLK
S D IN
MSB
-1 -2 -3 -4 -5
+ 5 + 4 + 3 +2 + 1
M SB
LS B
-1 -2 -3 -4
+ 5 +4 + 3 + 2 + 1
LS B
Figure 3. Left Justified up to 24-Bit Data
LR C K
R ig h t C h a n n e l
L e ft C h a n n e l
S C LK
S D IN
MSB
LSB
+1 +2 +3 +4 +5
-7 -6 -5 -4 -3 -2 -1
LSB
+1 +2 +3 +4 +5
-7 -6 -5 -4 -3 -2 -1
MSB
Figure 4. Right Justified Data
3 2 c lo ck s
3.5
MSB
De-Emphasis Control
The device includes on-chip digital de-emphasis. The Mode Control 2 bits select either the 32, 44.1, or 48
kHz de-emphasis filter. Figure 5 shows the de-emphasis curve for Fs equal to 44.1 kHz. The frequency
response of the de-emphasis curve will scale proportionally with changes in sample rate, Fs. Please see
section 5.2.3 for the desired de-emphasis control.
NOTE: De-emphasis is only available in Single-Speed Mode.
Gain
dB
T1=50 µs
0dB
T2 = 15 µs
-10dB
F1
3.183 kHz
F2
Frequency
10.61 kHz
Figure 5. De-Emphasis Curve
3.6
Recommended Power-up
Sequence
1. Hold RST low until the power supply is stable, and the master and left/right clocks are locked to
the appropriate frequences, as discussed in section 3.3. In this state, the control port is reset to its
default settings and VQ will remain low.
2. Bring RST high. The device will remain in a low power state with VQ low.
3. Load the desired register settings while keeping the PDN bit set to 1.
4. Set the PDN bit to 0. This will initiate the power-up sequence, which lasts approximately 50 µS
when the POR bit is set to 0. If the POR bit is set to 1, see section 3.7 for a complete description
of power-up timing.
DS582F2
9
CS4341A
3.7
Popguard® Transient Control
The CS4341A uses Popguard® technology to minimize the effects of output transients during power-up
and power-down. This technology, when used with external DC-blocking capacitors in series with the audio outputs, minimizes the audio transients commonly produced by single-ended single-supply converters.
It is activated inside the DAC when the PDN bit or the RST pin is enabled/disabled and requires no other
external control, aside from choosing the appropriate DC-blocking capacitors.
3.7.1
Power-up
When the device is initially powered-up, the audio outputs, AOUTL and AOUTR, are clamped to
AGND. Following a delay of approximately 1000 sample periods, each output begins to ramp toward the quiescent voltage. Approximately 10,000 LRCK cycles later, the outputs reach VQ and
audio output begins. This gradual voltage ramping allows time for the external DC-blocking capacitors to charge to the quiescent voltage, minimizing the power-up transient.
3.7.2
Power-down
To prevent transients at power-down, the device must first enter its power-down state by enabling
RST or PDN. When this occurs, audio output ceases and the internal output buffers are disconnected from AOUTL and AOUTR. In their place, a soft-start current sink is substituted which allows
the DC-blocking capacitors to slowly discharge. Once this charge is dissipated, the power to the
device may be turned off and the system is ready for the next power-on.
3.7.3
Discharge Time
To prevent an audio transient at the next power-on, it is necessary to ensure that the DC-blocking
capacitors have fully discharged before turning on the power or exiting the power-down state. If
not, a transient will occur when the audio outputs are initially clamped to AGND. The time that the
device must remain in the power-down state is related to the value of the DC-blocking capacitance.
For example, with a 3.3 µF capacitor, the minimum power-down time will be approximately 0.4
seconds.
3.8
Grounding and Power Supply Arrangements
As with any high resolution converter, the CS4341A requires careful attention to power supply and
grounding arrangements if its potential performance is to be realized. Figure 1 shows the recommended
power arrangements, with VA connected to a clean supply. If the ground planes are split between digital
ground and analog ground, REF_GND & AGND should be connected to the analog ground plane.
Decoupling capacitors should be as close to the DAC as possible, with the low value ceramic capacitor
being the closest. To further minimze impedance, these capacitors should be located on the same layer as
the DAC.
All signals, especially clocks, should be kept away from the FILT+ and VQ pins in order to avoid unwanted coupling into the modulators. The FILT+ and VQ decoupling capacitors, particularly the 0.1 µF, must
be positioned to minimize the electrical path from FILT+ to REF_GND (and VQ to REF_GND), and
should also be located on the same layer as the DAC. The CDB4341A evaluation board demonstrates the
optimum layout and power supply arrangements.
10
DS582F2
CS4341A
3.9
Control Port Interface
The control port is used to load all the internal register settings (see section 5). The operation of the control
port may be completely asynchronous with the audio sample rate. However, to avoid potential interference
problems, the control port pins should remain static if no operation is required.
The control port operates in one of two modes: I2C or SPI.
Notes: MCLK must be applied during all I2C communication.
3.9.1
Rise Time for Control Port Clock
When excess capacitive loading is present on the I2C clock line, pin 6 (SCL/CCLK) may not have
sufficient hysteresis to meet the standard I2C rise time specification. This prevents the use of common I2C configurations with a resistor pull-up. A workaround is achieved by placing a Schmitt
Trigger buffer, a 74HC14 for example, on the SCL line just prior to the CS4341A. This will not
affect the operation of the I2C bus as pin 6 is an input only.
VA
SCL
P in 6
Figure 6. I2C Buffer Example
3.9.2
MAP Auto Increment
The device has MAP (memory address pointer) auto increment capability enabled by the INCR bit
(also the MSB) of the MAP. If INCR is set to 0, MAP will stay constant for successive I2C writes
or reads, and SPI writes. If INCR is set to 1, MAP will auto increment after each byte is written,
allowing block reads or writes of successive registers.
DS582F2
11
CS4341A
3.9.3
I2C Mode
In the I2C mode, data is clocked into and out of the bi-directional serial control data line, SDA, by
the serial control port clock, SCL (see Figure 7 for the clock to data relationship). There is no CS
pin. Pin AD0 enables the user to alter the chip address (001000[AD0][R/W]) and should be tied to
VA or GND as required, before powering up the device. If the device ever detects a high to low
transition on the AD0/CS pin after power-up, SPI mode will be selected.
3.9.3a
I2C Write
To write to the device, follow the procedure below while adhering to the control port
Switching Specifications in section 7.
1) Initiate a START condition to the I2C bus followed by the address byte. The upper 6 bits
must be 001000. The seventh bit must match the setting of the AD0 pin, and the eighth must
be 0. The eighth bit of the address byte is the R/W bit.
2) Wait for an acknowledge (ACK) from the part, then write to the memory address pointer,
MAP. This byte points to the register to be written.
3) Wait for an acknowledge (ACK) from the part, then write the desired data to the register
pointed to by the MAP.
4) If the INCR bit (see section 3.9.2) is set to 1, repeat the previous step until all the desired
registers are written, then initiate a STOP condition to the bus.
5) If the INCR bit is set to 0 and further I2C writes to other registers are desired, it is necessary to initiate a repeated START condition and follow the procedure detailed from step
1. If no further writes to other registers are desired, initiate a STOP condition to the bus.
12
DS582F2
CS4341A
3.9.3b
I2C Read
To read from the device, follow the procedure below while adhering to the control port
Switching Specifications.
1) Initiate a START condition to the I2C bus followed by the address byte. The upper 6 bits
must be 001000. The seventh bit must match the setting of the AD0 pin, and the eighth must
be 1. The eighth bit of the address byte is the R/W bit.
2) After transmitting an acknowledge (ACK), the device will then transmit the contents of
the register pointed to by the MAP. The MAP register will contain the address of the last
register written to the MAP, or the default address (see section 3.9.2) if an I2C read is the
first operation performed on the device.
3) Once the device has transmitted the contents of the register pointed to by the MAP, issue
an ACK.
4) If the INCR bit is set to 1, the device will continue to transmit the contents of successive
registers. Continue providing a clock and issue an ACK after each byte until all the desired
registers are read, then initiate a STOP condition to the bus.
5) If the INCR bit is set to 0 and further I2C reads from other registers are desired, it is necessary to initiate a repeated START condition and follow the procedure detailed from step
1. If no further reads from other registers are desired, initiate a STOP condition to the bus.
N O TE
SDA
0 01 0 00
AD 0
R /W
ACK
D AT A
1-8
ACK
D A TA
1-8
ACK
SCL
S ta rt
Stop
N O TE : If operation is a w rite, this byte contains the M em ory A ddress P ointer, M A P . If
operation is a read, this byte contains the data of the register pointed to by the M A P .
Figure 7. Control Port Timing, I2C Mode
DS582F2
13
CS4341A
3.9.4
SPI Mode
In SPI mode, data is clocked into the serial control data line, CDIN, by the serial control port clock,
CCLK (see Figure 7 for the clock to data relationship). There is no AD0 pin. Pin CS is the chip
select signal and is used to control SPI writes to the control port. When the device detects a high to
low transition on the AD0/CS pin after power-up, SPI mode will be selected. All signals are inputs
and data is clocked in on the rising edge of CCLK.
3.9.4a
SPI Write
To write to the device, follow the procedure below while adhering to the control port
Switching Specifications in section 6.
1) Bring CS low.
2) The address byte on the CDIN pin must then be 00100000.
3) Write to the memory address pointer, MAP. This byte points to the register to be written.
4) Write the desired data to the register pointed to by the MAP.
5) If the INCR bit (see section 3.9.2) is set to 1, repeat the previous step until all the desired
registers are written, then bring CS high.
6) If the INCR bit is set to 0 and further SPI writes to other registers are desired, it is necessary to bring CS high, and follow the procedure detailed from step 1. If no further writes
to other registers are desired, bring CS high.
CS
CC LK
C H IP
ADDRESS
C D IN
0010000
MAP
R/W
DATA
LSB
MSB
byte 1
byte n
M A P = M em ory A d dress P oin te r
Figure 7. Control Port Timing, SPI mode
14
DS582F2
CS4341A
3.10
Memory Address Pointer (MAP)
7
INCR
0
6
Reserved
0
5
Reserved
0
4
Reserved
0
3
Reserved
0
2
MAP2
0
1
MAP1
0
0
MAP0
0
3.10.1 INCR (AUTO MAP INCREMENT ENABLE)
Default = ‘0’
0 - Disabled
1 - Enabled
3.10.2 MAP (MEMORY ADDRESS POINTER)
Default = ‘000’
DS582F2
15
CS4341A
4.
REGISTER QUICK REFERENCE
Addr
0h
Function
Mode Control 1
DEFAULT
1h
Mode Control 2
DEFAULT
2h
Transition and Mixing
Control
DEFAULT
3h
Channel A Volume
Control
4h
Channel B Volume
Control
DEFAULT
DEFAULT
16
7
6
5
4
3
2
1
0
Reserved
MC1
MC0
Reserved
Reserved
AUTOD
0
0
0
0
0
0
0
0
AMUTE
DIF2
DIF1
DIF0
DEM1
DEM0
POR
PDN
1
0
0
0
0
0
1
1
A=B
SOFT
ZERO
CROSS
ATAPI4
ATAPI3
ATAPI2
ATAPI1
ATAPI0
0
0
0
0
0
0
0
0
MUTEA
VOLA6
VOLA5
VOLA4
VOLA3
VOLA2
VOLA1
VOLA0
MCLKDIV Reserved
0
0
0
0
0
0
0
0
MUTEB
VOLB6
VOLB5
VOLB4
VOLB3
VOLB2
VOLB1
VOLB0
0
0
0
0
0
0
0
0
DS582F2
CS4341A
5.
REGISTER DESCRIPTION
NOTE: All registers are read/write in I2C mode and write only in SPI mode, unless otherwise stated.
5.1
MODE CONTROL 1 (ADDRESS 00H)
7
Reserved
0
6
MC1
0
5
MC0
0
5.1.1 SPEED MODE CONTROL (MC)
4
Reserved
0
3
Reserved
0
2
AUTOD
0
1
MCLKDIV
0
0
Reserved
0
BIT 5-6
Default = 00
00 - Single-Speed Mode
01 - Double-Speed Mode
10 - Quad-Speed Mode
The operational speed mode must be set if the auto-detect defeat bit is enabled (AUTOD = 1). These
bits are ignored if the auto-detect defeat is disabled (AUTOD = 0).
5.1.2 AUTO-DETECT DEFEAT (AUTOD) BIT 2
Default = 0
0 - Disabled
1 - Enabled
The Auto-Detect function can be defeated to allow sample rate changes from 50 to 84 kHz, and from
100 to 170 kHz. The operational speed mode must be set via the speed mode control bits (see section
5.1.1) if the auto-detect feature is defeated.
5.1.3 MCLK DIVIDE-BY-2 (MCLKDIV) BIT 1
Default = 0
0 - Disabled
1 - Enabled
Function:
The MCLKDIV bit enables a circuit which divides the externally applied MCLK signal by 2.
5.2
MODE CONTROL 2 (ADDRESS 01H)
7
AMUTE
1
DS582F2
6
DIF2
0
5
DIF1
0
4
DIF0
0
3
DEM1
0
2
DEM0
0
1
POR
1
0
PDN
1
17
CS4341A
5.2.1 AUTO-MUTE (AMUTE) BIT 7
Default = 1
0 - Disabled
1 - Enabled
Function:
The Digital-to-Analog converter output will mute following the reception of 8192 consecutive audio
samples of static 0 or -1. A single sample of non-zero data will release the mute. Detection and muting is done independently for each channel. The quiescent voltage on the output will be retained and
the Mute Control pin will go active during the mute period. The muting function is affected, similiar to
volume control changes, by the Soft and Zero Cross bits in the Transition and Mixing Control (address
02h) register.
5.2.2 DIGITAL INTERFACE FORMAT (DIF)
BIT 4-6
Default = 000 - Format 0 (I2S, up to 24-bit data)
Function:
The required relationship between the Left/Right clock, serial clock and serial data is defined by the
Digital Interface Format and the options are detailed in Figures 2-4.
DIF2
0
0
0
0
1
1
1
1
DIF1
0
0
1
1
0
0
1
1
DIF0
0
1
0
1
0
1
0
1
DESCRIPTION
I2S, up to 24-bit data
Identical to Format 1
Left Justified, up to 24-bit data,
Right Justified, 24-bit data
Right Justified, 20-bit data
Right Justified, 16-bit data
Right Justified, 18-bit data
Identical to Format 1
Format
1
1
2
3
4
5
6
1
FIGURE
2
2
3
4
4
4
4
2
Table 6. Digital Interface Format
5.2.3 DE-EMPHASIS CONTROL ( DEM[1:0] ) BIT 2-3
Default = 00
00 - Disabled
01 - 44.1 kHz
10 - 48 kHz
11 - 32 kHz
Function:
Implementation of the standard 15µs/50µs digital de-emphasis filter response, Figure 5, requires reconfiguration of the digital filter to maintain the proper filter response for 32, 44.1 or 48 kHz sample
rates.
NOTE: De-emphasis is only available in Single-Speed Mode.
18
DS582F2
CS4341A
5.2.4 POPGUARD® TRANSIENT CONTROL (POR) BIT 1
Default = 1
0 - Disabled
1 - Enabled
Function:
The PopGuard® Transient Control allows the quiescent voltage to slowly ramp to and from 0 volts to
the quiescent voltage during power-on or power-down. Please refer to section 3.7 for implementation
details.
5.2.5 POWER DOWN (PDN)
BIT 0
Default = 1
0 - Disabled
1 - Enabled
Function:
The device will enter a low-power state when this function is enabled. The power-down bit defaults to
‘enabled’ on power-up and must be disabled before normal operation can occur. The contents of the
control registers are retained in this mode.
5.3
TRANSITION AND MIXING CONTROL (ADDRESS 02H)
7
A=B
0
6
SZC1
1
5
SZC0
0
4
ATAPI4
0
3
ATAPI3
1
5.3.1 CHANNEL A VOLUME = CHANNEL B VOLUME (A = B)
2
ATAPI2
0
1
ATAPI1
0
0
ATAPI0
1
BIT 7
Default = 0
0 - Disabled
1 - Enabled
Fucntion:
The AOUTA and AOUTB volume levels are independently controlled by the A and the B Channel Volume Control Bytes when this function is disabled. The volume on both AOUTA and AOUTB are determined by the A Channel Volume Control Byte and the B Channel Byte is ignored when this function
is enabled.
DS582F2
19
CS4341A
5.3.2 SOFT RAMP AND ZERO CROSS CONTROL (SZC) BIT 5-6
Default = 10
00 - Immediate Changes
01 - Changes On Zero Crossings
10 - Soft Ramped Changes
11 - Soft Ramped Changes On Zero Crossings
Fucntion:
Immediate Changes
When Immediate Changes is selected all level changes will take effect immediately in one step.
Changes On Zero Crossings
Changes on Zero Crossings dictates that signal level changes, either by attenuation changes or muting, will occur on a signal zero crossing to minimize audible artifacts. The requested level change will
occur after a timeout period between 512 and 1024 sample periods (10.7 ms to 21.3 ms at 48 kHz
sample rate) if the signal does not encounter a zero crossing. The zero cross function is independenttly monitored and implemented for each channel.
Soft Ramped Changes
Soft Ramped Changes allows level changes, both muting and attenuation, to be implemented by incrementally ramping, in 1/8 dB steps, from the current level to the new level at a rate of 1dB per 8
left/right clock periods.
Soft Ramped Changes on Zero Crossings
Soft Ramped Changes On Zero Crossings dictates that signal level changes, either by attenuation
changes or muting, will occur in 1/8 dB steps implemented on a signal zero crossing. The 1/8 dB level
change will occur after a timeout period between 512 and 1024 sample periods (10.7 ms to 21.3 ms
at 48 kHz sample rate) if the signal does not encounter a zero crossing. The zero cross function is
indepently monitored and implemented for each channel.
5.3.3 ATAPI CHANNEL MIXING AND MUTING (ATAPI) BIT 0-4
Default = 01001 - AOUTA = Left Channel, AOUTB = Right Channel (Stereo)
Fucntion:
The CS4341A implements the channel mixing functions of the ATAPI CD-ROM specification. Refer
to Table 7 and Figure 8 for additional information.
ATAPI4
0
0
0
0
0
0
0
0
0
0
ATAPI3
0
0
0
0
0
0
0
0
1
1
ATAPI2
0
0
0
0
1
1
1
1
0
0
ATAPI1
0
0
1
1
0
0
1
1
0
0
ATAPI0
0
1
0
1
0
1
0
1
0
1
AOUTA
MUTE
MUTE
MUTE
MUTE
aR
aR
aR
aR
aL
aL
AOUTB
MUTE
bR
bL
b[(L+R)/2]
MUTE
bR
bL
b[(L+R)/2]
MUTE
bR
Table 7. ATAPI Decode
20
DS582F2
CS4341A
ATAPI4
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
ATAPI3
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
ATAPI2
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
ATAPI1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
ATAPI0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
AOUTA
aL
aL
a[(L+R)/2]
a[(L+R)/2]
a[(L+R)/2]
a[(L+R)/2]
MUTE
MUTE
MUTE
MUTE
aR
aR
aR
aR
aL
aL
aL
aL
[(aL+bR)/2]
[(aL+bR)/2]
[(bL+aR)/2]
[(aL+bR)/2]
AOUTB
bL
b[(L+R)/2]
MUTE
bR
bL
b[(L+R)/2]
MUTE
bR
bL
[(aL+bR)/2]
MUTE
bR
bL
[(bL+aR)/2]
MUTE
bR
bL
[(aL+bR)/2]
MUTE
bR
bL
[(aL+bR)/2]
Table 7. ATAPI Decode (Continued)
A Channel
Volume
Control
Left Channel
Audio Data
Σ
Right Channel
Audio Data
MUTE
AoutA
MUTE
AoutB
Σ
B Channel
Volume
Control
Figure 8. ATAPI Block Diagram
DS582F2
21
CS4341A
5.4
CHANNEL A VOLUME CONTROL (ADDRESS 03H)
5.5
CHANNEL B VOLUME CONTROL (ADDRESS 04H)
7
MUTEx
0
6
VOLx6
0
5.5.1 MUTE (MUTE)
5
VOLx5
0
4
VOLx4
0
3
VOLx3
0
2
VOLx2
0
1
VOLx1
0
0
VOLx0
0
BIT 7
Default = 0
0 - Disabled
1 - Enabled
Fucntion:
The Digital-to-Analog converter output will mute when enabled. The quiescent voltage on the output
will be retained. The muting function is affected, similiar to attenuation changes, by the Soft and Zero
Cross bits in the Transition and Mixing Control (address 02h) register. The MUTEC will go active during the mute period if the Mute function is enabled for both channels.
5.5.2 VOLUME (VOLx)
BIT 0-6
Default = 0 dB (No Attenuation)
Function:
The digital volume control allows the user to attenuate the signal in 1 dB increments from 0 to -90 dB.
Volume settings are decoded as shown in Table 8. The volume changes are implemented as dictated
by the Soft and Zero Cross bits in the Transition and Mixing Control (address 02h) register. All volume
settings less than - 94 dB are equivalent to enabling the Mute bit.
Binary Code
0000000
0010100
0101000
0111100
1011010
Decimal Value
0
20
40
60
90
Volume Setting
0 dB
-20 dB
-40 dB
-60 dB
-90 dB
Table 8. Example Digital Volume Settings
22
DS582F2
CS4341A
6.
CHARACTERISTICS AND SPECIFICATIONS
(Min/Max performance characteristics and specifications are guaranteed over the Specified Operating Conditions.
Typical performance characteristics are derived from measurements taken at TA = 25°C.)
SPECIFIED OPERATING CONDITIONS
Parameters
Symbol
Min
Typ
Max
Units
Analog
VA
3.0
4.5
3.3
5
3.6
5.5
V
V
(Power Applied)
TA
-10
-
+70
°C
DC Power Supply
Ambient Operating Temperature
ABSOLUTE MAXIMUM RATINGS (AGND = 0 V; all voltages with respect to AGND. Operation
beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these
extremes.)
Parameters
Symbol
Min
VA
-0.3
6.0
V
Iin
-
±10
mA
VIND
-0.3
VA+0.4
V
Ambient Operating Temperature (power applied)
TA
-55
125
°C
Storage Temperature
Tstg
-65
150
°C
DC Power Supply
Input Current
Digital Input Voltage
(Note 1)
Max
Units
Notes: 1. Any pin except supplies.
DS582F2
23
CS4341A
ANALOG CHARACTERISTICS (CS4341A-KS) (Test conditions (unless otherwise specified):
Input test signal is a 997 Hz sine wave at 0 dBFS; measurement bandwidth is 10 Hz to 20 kHz; test load RL =
10 kΩ, CL = 10 pF (see Figure 9))
VA = 5.0 V
Parameter
Single-Speed Mode
Dynamic Range
18 to 24-Bit
16-Bit
Total Harmonic Distortion + Noise
18 to 24-Bit
16-Bit
Double-Speed Mode
Dynamic Range
18 to 24-Bit
16-Bit
Total Harmonic Distortion + Noise
18 to 24-Bit
16-Bit
Quad-Speed Mode
Dynamic Range
18 to 24-Bit
16-Bit
Total Harmonic Distortion + Noise
18 to 24-Bit
16-Bit
24
VA = 3.3 V
Min
Typ
Max
Min
Typ
Max
Unit
92
95
-
98
101
92
95
-
88
91
-
94
97
92
95
-
dB
dB
dB
dB
-
-91
-78
-38
-90
-72
-32
-85
-
-
-94
-74
-34
-91
-72
-32
-88
-
dB
dB
dB
dB
dB
dB
92
95
-
98
101
92
95
-
88
91
-
94
97
92
95
-
dB
dB
dB
dB
-
-91
-78
-38
-90
-72
-32
-85
-
-
-94
-74
-34
-91
-72
-32
-88
-
dB
dB
dB
dB
dB
dB
92
95
-
98
101
92
95
-
88
91
-
94
97
92
95
-
dB
dB
dB
dB
-
-91
-78
-38
-90
-72
-32
-85
-
-
-94
-74
-34
-91
-72
-32
-88
-
dB
dB
dB
dB
dB
dB
Fs = 48 kHz
(Note 2)
unweighted
A-Weighted
unweighted
A-Weighted
(Note 2)
0 dB
-20 dB
-60 dB
0 dB
-20 dB
-60 dB
Fs = 96 kHz
(Note 2)
unweighted
A-Weighted
unweighted
A-Weighted
(Note 2)
0 dB
-20 dB
-60 dB
0 dB
-20 dB
-60 dB
Fs = 192 kHz
(Note 2)
unweighted
A-Weighted
unweighted
A-Weighted
(Note 2)
0 dB
-20 dB
-60 dB
0 dB
-20 dB
-60 dB
DS582F2
CS4341A
ANALOG CHARACTERISTICS (CS4341A-KS) (Continued)
Parameters
Symbol
Min
Typ
Max
Units
-
102
-
dB
Interchannel Gain Mismatch
-
0.1
-
dB
Gain Drift
-
±100
-
ppm/°C
0.6•VA
0.7•VA
0.8•VA
Vpp
-
100
-
Ω
Dynamic Performance for All Modes
Interchannel Isolation (1 kHz)
DC Accuracy
Analog Output Characteristics and Specifications
Full Scale Output Voltage
Output Impedance
Minimum AC-Load Resistance
(Note 3)
RL
-
3
-
kΩ
Maximum Load Capacitance
(Note 3)
CL
-
100
-
pF
Notes: 2. One-half LSB of triangular PDF dither is added to data.
.
3. Refer to Figure 10.
3.3 µF
AOUTx
+
V
out
R
L
AGND
C
L
Capacitive Load -- C L (pF)
125
100
75
Safe Operating
Region
50
25
2.5
3
Figure 9. Output Test Load
DS582F2
5
10
15
20
Resistive Load -- RL (kΩ )
Figure 10. Maximum Loading
25
CS4341A
COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE
(The filter characteristics and the X-axis of the response plots have been normalized to the sample rate (Fs) and can
be referenced to the desired sample rate by multiplying the given characteristic by Fs.)
Parameter
Min
Typ
Max
Unit
0
0
-
0.4535
0.4998
Fs
Fs
-0.02
-
+0.08
dB
0.5465
-
-
Fs
50
-
-
dB
Single-Speed Mode - (4 kHz to 50 kHz sample rates)
Passband
to -0.05 dB corner
to -3 dB corner
Frequency Response 10 Hz to 20 kHz
StopBand
StopBand Attenuation
(Note 4)
Group Delay
-
9/Fs
-
s
-
-
+0.2/-0.1
+0.05/-0.14
+0/-0.22
dB
dB
dB
0
0
-
0.4621
0.4982
Fs
Fs
Frequency Response 10 Hz to 20 kHz
-0.06
-
+0.2
dB
StopBand
0.577
-
-
Fs
55
-
-
dB
-
4/Fs
-
s
-
±1.39/Fs
±0.23/Fs
-
s
s
Frequency Response 10 Hz to 20 kHz
-1
-
0
dB
Group Delay
-
3/Fs
-
s
De-emphasis Error (Relative to 1 kHz)
(Note 5)
Fs = 32 kHz
Fs = 44.1 kHz
Fs = 48 kHz
Double-Speed Mode - (50 kHz to 100 kHz sample rates)
Passband
to -0.1 dB corner
to -3 dB corner
StopBand Attenuation
(Note 4)
Group Delay
Passband Group Delay Deviation
0 - 40 kHz
0 - 20 kHz
Quad-Speed Mode - (100 kHz to 200 kHz sample rates)
Notes: 4. 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.
5. De-emphasis is only available in Single-Speed Mode.
26
DS582F2
CS4341A
Figure 10. Single-Speed Stopband Rejection
Figure 12. Single-Speed Transition Band (Detail)
Figure 14. Double-Speed Stopband Rejection
DS582F2
Figure 11. Single-Speed Transition Band
Figure 13. Single-Speed Passband Ripple
Figure 15. Double-Speed Transition Band
27
CS4341A
Figure 16. Double-Speed Transition Band (Detail)
28
Figure 17. Double-Speed Passband Ripple
DS582F2
CS4341A
SWITCHING SPECIFICATIONS - SERIAL AUDIO INTERFACE
Parameters
Symbol
Min
Max
Units
MCLK Frequency
1.024
51.2
MHz
MCLK Duty Cycle
45
55
%
4
50
100
50
100
200
kHz
kHz
kHz
40
60
%
Input Sample Rate
Single-Speed Mode
Double-Speed Mode
Quad-Speed Mode
Fs
Fs
Fs
LRCK Duty Cycle
SCLK Pulse Width Low
tsclkl
20
-
ns
SCLK Pulse Width High
tsclkh
20
-
ns
MCLKDIV Disabled
-
MCLK
-----------------2
Hz
MCLKDIV Enabled
-
MCLK
-----------------4
Hz
SCLK Frequency
SCLK rising to LRCK edge delay
tslrd
20
-
ns
SCLK rising to LRCK edge setup time
tslrs
20
-
ns
SDIN valid to SCLK rising setup time
tsdlrs
20
-
ns
SCLK rising to SDIN hold time
tsdh
20
-
ns
SCLK rising to MCLK edge delay (NOTE 7)
tsmd
8
-
ns
6. Only required for Quad-speed mode.
M C LK
tsm d
LR C K
t s lrd
t s lrs
t s c lk l
t s c lk h
SC LK
t s d lrs
tsd h
SDATA
Figure 18. Serial Input Timing
DS582F2
29
CS4341A
SWITCHING SPECIFICATIONS - CONTROL PORT INTERFACE
(Inputs: Logic 0 = AGND, Logic 1 = VA)
Parameter
Symbol
Min
Max
Unit
SCL Clock Frequency
fscl
-
100
kHz
RST Rising Edge to Start
tirs
500
-
ns
Bus Free Time Between Transmissions
tbuf
4.7
-
µs
Start Condition Hold Time (prior to first clock pulse)
thdst
4.0
-
µs
Clock Low time
tlow
4.7
-
µs
Clock High Time
thigh
4.0
-
µs
Setup Time for Repeated Start Condition
tsust
4.7
-
µs
thdd
0
-
µs
tsud
250
-
ns
trc
-
25
ns
Fall Time SCL
tfc
-
25
ns
Rise Time of SDA
trd
-
1
µs
Fall Time SDA
tfd
-
300
ns
tsusp
4.7
-
µs
2
I C Mode
SDA Hold Time from SCL Falling
(Note 7)
SDA Setup time to SCL Rising
Rise Time of SCL
(Note 8)
Setup Time for Stop Condition
Notes: 7. Data must be held for sufficient time to bridge the transition time, tfc, of SCL.
8. See “Rise Time for Control Port Clock” on page 11. for a recommended circuit to meet rise time
specification.
RST
t irs
Stop
R e p e a te d
S ta rt
S ta rt
Stop
SDA
t buf
t
t high
t hdst
tf
hdst
t susp
SCL
t
lo w
t
hdd
t sud
t sust
tr
Figure 19. Control Port Timing - I2C Mode
30
DS582F2
CS4341A
SWITCHING SPECIFICATIONS - CONTROL PORT INTERFACE
Parameter
(Continued)
Symbol
Min
Max
Unit
CCLK Clock Frequency
fsclk
-
6
MHz
RST Rising Edge to CS Falling
tsrs
500
-
ns
tspi
500
-
ns
CS High Time Between Transmissions
tcsh
1.0
-
µs
CS Falling to CCLK Edge
tcss
20
-
ns
CCLK Low Time
tscl
66
-
ns
CCLK High Time
tsch
66
-
ns
CDIN to CCLK Rising Setup Time
tdsu
40
-
ns
SPI Mode
CCLK Edge to CS Falling
(Note 9)
CCLK Rising to DATA Hold Time
(Note 10)
tdh
15
-
ns
Rise Time of CCLK and CDIN
(Note 11)
tr2
-
100
ns
Fall Time of CCLK and CDIN
(Note 11)
tf2
-
100
ns
Notes: 9. tspi only needed before first falling edge of CS after RST rising edge. tspi = 0 at all other times.
10. Data must be held for sufficient time to bridge the transition time of CCLK.
11. For fsclk < 1 MHz.
RST
t srs
CS
t spi
t css
t scl
t sch
t csh
CCLK
t r2
t f2
C D IN
t dsu t
dh
Figure 20. Control Port Timing - SPI Mode
DS582F2
31
CS4341A
DC ELECTRICAL CHARACTERISTICS
(AGND = 0 V; all voltages with respect to AGND.)
Parameters
Symbol
Min
Typ
Max
Units
IA
-
18
15
25
20
mA
mA
-
90
50
125
100
mW
mW
-
60
35
-
µA
µA
-
0.3
0.1
-
mW
mW
-
60
40
-
dB
dB
VQ Nominal Voltage
Output Impedance
Maximum allowable DC current source/sink
-
0.5•VA
250
0.01
-
kΩ
Filt+ Nominal Voltage
Output Impedance
Maximum allowable DC current source/sink
-
VA
250
0.01
-
mA
MUTEC Low-Level Output Voltage
-
0
-
V
MUTEC High-Level Output Voltage
-
VA
-
V
Maximum MUTEC Drive Current
-
3
-
mA
Normal Operation (Note 12)
Power Supply Current
VA = 5.0 V
VA = 3.3 V
Power Dissipation
VA = 5.0 V
VA = 3.3 V
Power-down Mode (Note 13)
Power Supply Current
VA = 5.0 V
VA = 3.3 V
Power Dissipation
VA = 5.0 V
VA = 3.3 V
IA
All Modes of Operation
Power Supply Rejection Ratio (Note 14)
1 kHz
60 Hz
PSRR
V
mA
V
kΩ
DIGITAL INPUT CHARACTERISTICS (AGND = 0 V; all voltages with respect to AGND.)
Parameters
Input Leakage Current
Input Capacitance
DIGITAL INTERFACE SPECIFICATIONS
Parameters
Symbol
Min
Typ
Max
Units
Iin
-
-
±10
µA
-
8
-
pF
(GND = 0 V; all voltages with respect to GND.)
Symbol
Min
Max
Units
High-Level Input Voltage
VIH
2.0
-
V
Low-Level Input Voltage
VIL
-
0.8
V
Interface Voltage Supply = 3.3 V or 5.0 V
12. Normal operation is defined as RST = HI with a 997 Hz, 0dBFS input sampled at the highest Fs for each
speed mode, and open outputs, unless otherwise specified.
13. Power Down Mode is defined as RST = LO with all clocks and data lines held static.
14. Valid with the recommended capacitor values on FILT+ and VQ as shown in Figure 1. Increasing the
capacitance will also increase the PSRR.
32
DS582F2
CS4341A
7.
PARAMETER DEFINITIONS
Total Harmonic Distortion + Noise (THD+N)
The ratio of the rms value of the signal to the rms sum of all other spectral components over the specified
bandwidth (typically 10 Hz to 20 kHz), including distortion components. Expressed in decibels.
Dynamic Range
The ratio of the full-scale rms value of the signal to the rms sum of all other spectral components over the
specified bandwidth. Dynamic range is a signal-to-noise measurement over the specified bandwidth
made with a -60 dBFS signal. 60 dB is then added to the resulting measurement to refer the measurement
to full scale. This technique ensures that the distortion components are below the noise level and do not
affect the measurement. This measurement technique has been accepted by the Audio Engineering Society, AES17-1991, and the Electronic Industries Association of Japan, EIAJ CP-307.
Interchannel Isolation
A measure of crosstalk between the left and right channels. Measured for each channel at the converter's
output with all zeros to the input under test and a full-scale signal applied to the other channel. Units are
in decibels.
Interchannel Gain Mismatch
The gain difference between left and right channels. Units in decibels.
Gain Error
The deviation from the nominal, full-scale analog output for a full-scale digital input.
Gain Drift
The change in gain value with temperature. Units in ppm/°C.
8.
REFERENCES
1) CDB4341A Evaluation Board Datasheet
2) “The I2C Bus Specification: Version 2.1” Philips Semiconductors, January 2000.
http://www.semiconductors.philips.com
DS582F2
33
CS4341A
9.
PACKAGE DIMENSIONS
16L SOIC (150 MIL BODY) PACKAGE DRAWING
E
H
1
b
c
D
SEATING
PLANE
∝
A
L
e
A1
INCHES
DIM
A
A1
B
C
D
E
e
H
L
∝
MIN
0.053
0.004
0.013
0.007
0.386
0.150
0.040
0.228
0.016
0°
MILLIMETERS
MIN
MAX
1.35
1.75
0.10
0.25
0.33
0.51
0.19
0.25
9.80
10.00
3.80
4.00
1.02
1.52
5.80
6.20
0.40
1.27
0°
8°
MAX
0.069
0.010
0.020
0.010
0.394
0.157
0.060
0.244
0.050
8°
JEDEC # : MS-012
THERMAL CHARACTERISTICS AND SPECIFICATIONS
Parameters
Package Thermal Resistance
34
Symbol
Min
Typ
Max
Units
θJA
-
125
-
°C/Watt
DS582F2