CS4270-DZZ Cirrus Logic Inc, CS4270-DZZ Datasheet - Page 27

• Manufacturer Part Number: CS4270-DZZ
• Description: IC CODEC 24BIT 105DB 24TSSOP
• Manufacturer: Cirrus Logic Inc
• Type: Stereo Audior

Specifications of CS4270-DZZ

• Data Interface: Serial
• Resolution (bits): 24 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 105 / 105
• Voltage - Supply, Analog: 3.1 V ~ 5.25 V
• Voltage - Supply, Digital: 3.1 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Audio Codec Type: Stereo
• No. Of Adcs: 1
• No. Of Dacs: 1
• No. Of Input Channels: 3
• No. Of Output Channels: 3
• Adc / Dac Resolution: 24bit
• Sampling Rate: 216kSPS
• Ic Interface Type: I2C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1002 - BOARD EVAL FOR CS4270 CODEC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 598-1622

DS686F1
5.5.2
5.6
Mute Control
The Mute Control pins become active during power-up initialization, reset, muting, when the MCLK to LRCK
ratio is incorrect, and during power-down. The MUTE pins are intended to be used as control for an external
mute circuit in order to add device mute capability.
The CS4270 also features Auto-Mute, which is enabled by default. The Auto-Mute function causes the
MUTE pin corresponding to an individual channel to activate following the reception of 8192 consecutive
static-level audio samples on the respective channel. A single transition of data on the channel will cause
the corresponding MUTE pin to deactivate.
Use of the Mute Control function is not mandatory but recommended for designs requiring the absolute min-
imum in extraneous clicks and pops. Also, use of the Mute Control function can enable the system designer
to achieve idle channel noise/signal-to-noise ratios which are only limited by the external mute circuit. The
MUTE pins are active-low. See
Output Connections
The analog output filter present in the CS4270 is a switched-capacitor low pass filter. Its response, com-
bined with that of the digital interpolator, is given in
circuitry is shown in
CS4270
AOUTx
CS4270
AOUTx
MUTEx
Figure
Figure 18. CS4270 Recommended Analog Output Filter
+
3.3 µF
C =
Figure 19. Suggested Active-Low Mute Circuit
18.
10 k
Figure 19
4 F s ( R
R
ext
LPF
+ 470
ext
for a suggested active-low mute circuit.
470 )
+V
-V
470 
Couple
AC
MMUN2111LT1
+V
A
Figures 23
-V
10 k
560 
C
2 k
Analog Output
- 46. The recommended external analog
47 k
Audio
Out
R
ext
CS4270
27