CS53L21-CNZ Cirrus Logic Inc, CS53L21-CNZ Datasheet - Page 27

• Manufacturer Part Number: CS53L21-CNZ
• Description: IC ADC STEREO 24BIT 98DB 32QFN
• Manufacturer: Cirrus Logic Inc

Specifications of CS53L21-CNZ

• Package / Case: 32-QFN
• Number Of Converters: 2
• Number Of Bits: 24
• Sampling Rate (per Second): 100k
• Data Interface: Serial
• Power Dissipation (max): 30mW
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -10°C ~ 70°C
• Mounting Type: Surface Mount
• Conversion Rate: 96 KSPS
• Resolution: 24 bit
• Number Of Adc Inputs: 6
• Operating Supply Voltage: 1.8 V or 2.5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 10 C
• Mounting Style: SMD/SMT
• Power Consumption: 60 mW
• Supply Voltage (max): 2.63 V
• Supply Voltage (min): 1.65 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1550 - BOARD EVAL FOR CS53L21 ADC
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 598-1191

DS700PP1
4.3.8
Noise Gate
The noise gate may be used to mute signal levels that fall below a programmable threshold. This prevents
the ALC from applying gain to noise. A programmable delay may be used to set the minimum time before
the noise gate attacks the signal.
Maximum noise gate attenuation levels will depend on the gain applied in either the PGA or MIC pre-am-
plifier. For example: If both +32 dB pre-amplification and +12 dB programmable gain is applied, the max-
imum attenuation that the noise gate achieves will be 52 dB (-96 + 32 + 12) below full-scale.
Ramp-down time to the maximum setting is affected by the SOFTx bit.
Recommended settings: For best results, enable soft ramp for the digital attenuator. When the analog in-
puts are configured for differential signals (see
page
Software
Controls:
23), enable the NG_ALL bit to trigger the noise gate only when both inputs fall below the threshold.
“Noise Gate Configuration & Misc. (Address 1Fh)” on page
page
45.
Output
(dB)
-96
Figure 11. Noise Gate Attenuation
THRESH[2:0]
“Differential Inputs” on page 23“Differential Inputs” on
-40
-52 dB
-64 dB
-80 dB
Input (dB)
54,
“ADC Control (Address 06h)” on
CS53L21
27