MAX9597CTI+T Maxim Integrated Products, MAX9597CTI+T Datasheet - Page 23

• Manufacturer Part Number: MAX9597CTI+T
• Description: IC AUD/VID INTERACE 28TQFN-EP
• Manufacturer: Maxim Integrated Products
• Type: Audio/Video Interfacer

Specifications of MAX9597CTI+T

• Applications: DVD, Set-Top Boxes
• Mounting Type: Surface Mount
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Keep the full-scale audio output of the preamplifiers to
0.5V
lowpass filter to attenuate any high-frequency noise
coming from the stereo audio DAC. The frequency of
the lowpass pole is represented by this equation:
If the stereo audio DAC generates an analog, current
mode, and differential audio signal, the Typical
Application Circuit can be used to convert the signal to
single ended. The transresistance of the circuit is rep-
resented by this equation:
Keep the full-scale audio output of the preamplifiers to
0.5V
lowpass filter to attenuate any high-frequency noise
coming from the stereo audio DAC. The frequency of
the lowpass pole is represented by this equation:
Figure 15. Lowpass Filter Configuration for the Cirrus CS4334
f
−
3
RMS
RMS
dB
f
=
−
. Capacitors C1 and C2 create a one-pole,
. Capacitors C1 and C2 create a one-pole,
3
2
dB
π
⎛
⎝ ⎜
=
R
R
1
1
2
×
+
π
1
(
R
R
R C
______________________________________________________________________________________
V
NOTE: ALL RESISTORS ARE 1%.
1
2
2
F
OUT
⎞
⎠ ⎟
)
CS4334
RIGHT
LEFT
DAC
C
1
1
= I
or f
or f
DIFF
−
−
3
3
dB
dB
x R
270kΩ
270kΩ
10µF
10µF
=
=
Low-Power Audio/Video Interface
F
2
2
1.21kΩ
π
1.21kΩ
π
(
R C
⎛
⎝ ⎜
1
R
R
F
2.7nF
2.7nF
1
1
)
×
+
1
2
R R
R
for Single SCART Connectors
2
2
⎞
⎠ ⎟
C
4.64kΩ
4.64kΩ
2
3.3nF
3.3nF
Figure 16. Filter Response of CS4334 Filter Configuration
2.40kΩ
2.40kΩ
1.21kΩ
1.21kΩ
CS4334 APPLICATION CIRCUIT WITHOUT THE DAC
-10
-20
-30
-40
-50
-60
10
0
1
3.57kΩ
3.57kΩ
FILTER RESPONSE vs. FREQUENCY
560pF
560pF
10
ENC_INR-
ENC_INROUT
ENC_INL+
ENC_INL-
ENC_INLOUT
ENC_INR+
100
FREQUENCY (Hz)
MAX9597
1k
10k
V
IN
= 0.25V
100k
RMS
1M
23