CS43L22-CNZ Cirrus Logic Inc, CS43L22-CNZ Datasheet - Page 27

• Manufacturer Part Number: CS43L22-CNZ
• Description: IC DAC W/HDPN & SPKR AMPS 40QFN
• Manufacturer: Cirrus Logic Inc

Specifications of CS43L22-CNZ

• Package / Case: 40-QFN
• Number Of Bits: 24
• Data Interface: Serial
• Number Of Converters: 1
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Conversion Rate: 96 KSPS
• Resolution: 24 bit
• Interface Type: Serial
• Operating Supply Voltage: 1.8 V or 2.5 V
• Operating Temperature Range: + 85 C
• Mounting Style: SMD/SMT
• Number Of Dac Outputs: 2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1529 - BOARD EVAL FOR CS43L22
• Power Dissipation (max): -
• Settling Time: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 598-1650

DS792F2
4.5.1
4.5.2
4.5.2.1
Using SPKxVOL, the speaker output level must first be attenuated by the decibel equivalent of the expect-
ed VP supply range (MAX relative to MIN). The CS43L22 then gradually reduces the attenuation as the
VP supply drops from its maximum level, maintaining a nearly constant power output.
Compensation Example 1 (VP Battery supply ranges from 4.5 V to 3.0 V)
1. Set speaker attenuation (SPKxVOL) to -3.5 dB. The VP supply changes ~3.5 dB.
Compensation Example 2 (VP Battery supply ranges from 5.0 V to 1.6 V)
1. Set speaker attenuation (SPKxVOL) to -10 dB. The VP supply changes ~9.9 dB.
The CS43L22 automatically adjusts the output level as the battery discharges. Refer to
page
CS43L22’s battery compensation.
Mono Speaker Output Configuration
The CS43L22 accommodates a stereo as well as a mono speaker output configuration. In mono mode
the output drivers of each channel are connected in parallel to deliver maximum power to a 4 ohm speak-
er. Refer to the table below for pin mapping in mono configuration.
VP Battery Compensation
The CS43L22 provides the option to maintain a desired power output level, independent of the VP supply.
When enabled, this feature works by monitoring the voltage on the VP supply and reducing the attenua-
tion on the speaker outputs when VP voltage levels fall.
Note: The internal ADC that monitors the VP supply operates from the VA supply. Calculations are based
on typical VA levels of 1.8 V and 2.5 V using the VPREF bits.
The CS43L22 automatically adjusts the output level as the battery discharges.
2. Set the reference VP supply (VPREF) to 4.5 V.
3. Enable battery compensation (BATTCMP).
2. Set the reference VP supply (VPREF) to 5.0 V.
3. Enable battery compensation (BATTCMP).
Referenced Control
SPKMONO..........................
SPKSWAP...........................
28. In this example, the VP supply changes over a wide range, illustrating the accuracy of the
Pin
4
6
7
9
Maintaining a Desired Output Level
SPKSWAP=0
SPKOUTB+
SPKOUTA+
SPKOUTA-
SPKOUTB-
Register Location
“Speaker MONO Control” on page 46
“Speaker Channel Swap” on page 45
SPKMONO=0
Confidential Draft
SPKSWAP=1
3/4/10
SPKOUTB+
SPKOUTA+
SPKOUTB-
SPKOUTA-
Speaker Output
SPKSWAP=0
SPKOUTA+
SPKOUTA+
SPKOUTA-
SPKOUTA-
SPKMONO=1
SPKSWAP=1
SPKOUTB+
SPKOUTB+
SPKOUTB-
SPKOUTB-
CS43L22
Figure 11 on
27