CS4385-CQZ Cirrus Logic Inc, CS4385-CQZ Datasheet - Page 25

• Manufacturer Part Number: CS4385-CQZ
• Description: IC DAC 8CH 114DB 192KHZ 48LQFP
• Manufacturer: Cirrus Logic Inc

Specifications of CS4385-CQZ

• Package / Case: 48-LQFP
• Number Of Bits: 24
• Data Interface: Serial
• Number Of Converters: 8
• Voltage Supply Source: Analog and Digital
• Power Dissipation (max): 520mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Conversion Rate: 216 KSPS
• Resolution: 24 bit
• Interface Type: Serial
• Operating Supply Voltage: 5 V
• Operating Temperature Range: + 85 C
• Maximum Power Dissipation: 390 mW
• Mounting Style: SMD/SMT
• Number Of Dac Outputs: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1154 - BOARD EVAL FOR CS4385 DAC
• Settling Time: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 598-1063

DS670F2
4.5
4.6
Interpolation Filter
To accommodate the increasingly complex requirements of digital audio systems, the CS4365 incorporates
selectable interpolation filters for each mode of operation. A “fast” and a “slow” roll-off filter is available in
each of Single, Double, and Quad-Speed modes. These filters have been designed to accommodate a va-
riety of musical tastes and styles. The FILT_SEL bit is used to select which filter is used (see the
Plots” on page 45
When in Hardware Mode, only the “fast” roll-off filter is available.
Filter specifications can be found in
De-Emphasis
The CS4365 includes on-chip digital de-emphasis filters. The de-emphasis feature is included to accommo-
date older audio recordings that utilize pre-emphasis equalization as a means of noise reduction.
shows the de-emphasis curve. The frequency response of the de-emphasis curve will scale proportionally
with changes in sample rate, Fs if the input sample rate does not match the coefficient which has been se-
lected.
In Software Mode the required de-emphasis filter coefficients for 32 kHz, 44.1 kHz, or 48 kHz are selected
via the de-emphasis control bits.
In Hardware Mode only the 44.1 kHz coefficient is available (enabled through the M2 pin). If the input sam-
ple rate is not 44.1 kHz and de-emphasis has been selected then the corner frequencies of the de-emphasis
filter will be scaled by a factor of the actual Fs over 44,100.
for more details).
-10dB
Gain
0dB
dB
Figure 16. De-Emphasis Curve
Section
3.183 kHz
T1=50 µs
F1
, and filter response plots can be found in
10.61 kHz
F2
T2 = 15 µs
Frequency
Figures 24
CS4365
Figure 16
to 47.
“Filter
25