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

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

Specifications of CS4270-CZZ

• Package / Case: 24-TSSOP
• 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: -10°C ~ 70°C
• Mounting Type: Surface Mount
• Number Of Adc Inputs: 2
• Number Of Dac Outputs: 2
• Conversion Rate: 216 KSPS
• Interface Type: Serial (I2S, SPI)
• Resolution: 24 bit
• Operating Supply Voltage: 3.3 V, 5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 10 C
• Number Of Channels: 2 ADC/2 DAC
• Thd Plus Noise: - 95 dB ADC / - 95 dB DAC
• 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
• Other names: 598-1040-5

DS686PP1
5.2.8 De-Emphasis
5.2.9 Oversampling Modes
5.3
De-Emphasis Filter
One de-emphasis mode is available via the Control Port and is optimized for 44.1 kHz sampling rate.
The CS4270 operates in one of three oversampling modes based on the input sample rate. Mode selec-
tion is determined by the FM_&_M/S_Mode[1:0] bits in the Functional Mode register (03h). Single-Speed
Mode supports input sample rates up to 54 kHz and uses a 128x oversampling ratio. Double-Speed Mode
supports input sample rates up to 108 kHz and uses an oversampling ratio of 64x. Quad-Speed Mode
supports input sample rates up to 216 kHz and uses an oversampling ratio of 32x. See
trol Port Mode settings.
The CS4270 includes on-chip digital de-emphasis.
to 44.1 kHz. The frequency response of the de-emphasis curve will scale proportionally with changes in
sample rate, Fs. Please see
Section 5.2.8
The de-emphasis feature is included to accommodate audio recordings that utilize 50/15 µs pre-emphasis
equalization as a means of noise reduction.
De-emphasis is only available in Single-Speed Mode.
for Control Port Mode.
-10dB
Gain
0dB
dB
Section 5.1.7
Figure 14. De-Emphasis Curve
3.183 kHz
T1=50 µs
F1
for the desired de-emphasis control for Stand-Alone Mode and
Figure 14
10.61 kHz
F2
shows the de-emphasis curve for Fs equal
T2 = 15 µs
Frequency
Table 10
CS4270
for Con-
27