CS4299-JQZR Cirrus Logic Inc, CS4299-JQZR Datasheet - Page 38

• Manufacturer Part Number: CS4299-JQZR
• Description: IC AC97 Codec With SRC
• Manufacturer: Cirrus Logic Inc
• Series: SoundFusion™r
• Type: Audio Codec '97r

Specifications of CS4299-JQZR

• Data Interface: Serial
• Resolution (bits): 18 b, 20 b
• Number Of Adcs / Dacs: 1 / 1
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 85 / 87
• Voltage - Supply, Analog: 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 3.3 V ~ 5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• No. Of Dacs: 1
• No. Of Input Channels: 6
• No. Of Output Channels: 2
• Adc / Dac Resolution: 20bit
• Adcs / Dacs Signal To Noise Ratio: 70dB
• Sampling Rate: 48kSPS
• Supply Voltage Range: 3.135V To 3.465V, 4.75V To 5.25V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.1.5
One application of the PHONE input is to interface
to the output of a modem analog front end (AFE)
device so that modem dialing signals and protocol
negotiations may be monitored through the audio
system. Figure 16 shows a design for a modem
connection where the output is fed from the
CS4299 MONO_OUT pin through a divider. The
divider ratio shown does not attenuate the signal,
providing an output voltage of 1 V
output voltage is desired, the resistors can be re-
placed with appropriate values, as long as the total
load on the output is kept greater than 10 kΩ. The
PHONE input is divided by 6 dB to accommodate
a line-level source of 2 V
6.2
The analog line-level output section provides two
stereo
LINE_OUT_L/R,
38
38
MONO_OUT
PHONE
Analog Outputs
outputs
Phone Input
Figure 16. Modem Connection
6.8 kΩ
0 Ω
ALT_LINE_OUT_R
ALT_LINE_OUT_L
and
ALT_LINE_OUT_L/R,
AGND
6.8 kΩ
a
RMS
Figure 17. Alternate Line Output as Headphone Output
Vrefout
1.0 µ F
mono
.
47 kΩ
1.0 µ F
AGND
1000 pF
NPO
RMS
AGND
1000 pF
output.
. If a lower
1000 pF
NPO
PHONE
MONO_OUT
27 kΩ
27 kΩ
The
and
2
3
5
6
TDA1308
+
+
-
-
39 kΩ
39 kΩ
22 pF
NPO
22 pF
NPO
1
7
MONO_OUT pins require 680 pF to 1000 pF NPO
capacitors between the corresponding pin and ana-
log ground. Each analog output is DC-biased up to
the Vrefout signal reference, nominally 2.3 V. This
requires the outputs be AC-coupled to external cir-
cuitry (AC load must be greater than 10 kΩ) or DC
coupled to a buffer op-amp biased at Vrefout.
6.2.1
See Figure 18 for a line-level stereo output refer-
ence design. See Figure 17 for a recommended
headphone stereo output reference design.
6.2.2
The mono output, MONO_OUT, can be either a
sum of the left and right output channels, attenuat-
ed by 6 dB to prevent clipping at full scale, or the
selected Mic signal. The mono out channel can
drive the PC internal mono speaker using an appro-
priate buffer circuit
+
+
220 µ F
220 µ F
ELEC
ELEC
ALT_LINE_OUT_R
47 kΩ
ALT_LINE_OUT_L
VREFOUT
Stereo Outputs
Mono Output
AGND
1000 pF
0.1 µF
NPO
Y5V
47 kΩ
10 Ω
1/4 Watt
1/4 Watt
Figure 18. Stereo Output
10 Ω
AGND
AGND
1000 pF
NPO
1 µF
1
2
27 kΩ
4
3
Headphone
Out
2
3
1
2
6
5
-
+
-
+
39 kΩ
22 pF
NPO
22 pF
NPO
TDA1308
TDA1308
4
3
1
7
220 µF
220 µF
ELEC
ELEC
+
+
AGND
4
1
CS4299
3
2
CS4299
1/4 WATT
1/4 WATT
47 kΩ
DS319PP6
10 Ω
10 Ω
HP_OUT_R
HP_OUT_L