CS42L55 datasheet(10/73 Pages) CIRRUS

10 / 73 page

DS773F1

CS42L55

2. TYPICAL CONNECTION DIAGRAM

Note 2

2.2 µF

Note 1

Analog

Input 1

Analog

Input 2

1 µF

GND/Thermal Pad

0.1 µF

+1.65 V to +3.47 V

SCL

SDA

RESET

2 k

LRCK

MCLK

SCLK

2.2 µF

+VHPFILT

VDFILT

LINEREF

SDIN

SDOUT

1 µF

AIN2REF

AIN1A

1800 pF

100 k

100

AIN1B

Digital Audio

Processor

AIN2A

1800 pF

AIN2B

FLYC

FLYN

-VHPFILT

2.2 µF

1 µF

100 k

100

100 k

2.2 µF

VCP

AIN1REF

1 µF

LINEOUTA

LINEOUTB

0.1 µF

+1.65 V to +2.71 V

0.1 µF

VLDO

2.2 µF

AGND

NPO/C0G dielectric capacitors.

1000 pF

AFILTA

AFILTB

1000 pF

2.2 µF

HPOUTB

HPOUTA

Headphone Out

Left & Right

0.1 µF

HPDETECT

0.1 µF

47 k

HPREF

FILT+

+1.65 V to +2.71 V

FLYP

2.2 µF **

Note 1

Notes:

1. The headphone amplifier’s output power and distortion are rated using the nominal capacitance shown. Larger capacitance

reduces the ripple on the internal amplifiers’ supplies and in turn reduces the amplifier’s distortion at high output power levels.

Smaller capacitance may not sufficiently reduce ripple to achieve the rated output power and distortion. Since the actual value

of typical X7R/X5R ceramic capacitors deviates from the nominal value by a percentage specified in the manufacturer’s data

sheet, capacitors should be selected based on the minimum output power and maximum distortion required.

2. The headphone amplifier’s output power and distortion are rated using the nominal capacitance shown and using the default

charge pump switching frequency. The required capacitance follows an inverse relationship with the charge pump’s switching

frequency. When increasing the switching frequency, the capacitance may decrease; when lowering the switching frequency,

the capacitance must increase. Since the actual value of typical X7R/X5R ceramic capacitors deviates from the nominal value

by a percentage specified in the manufacturer’s data sheet, capacitors should be selected based on the minimum output

power, maximum distortion and maximum charge pump switching frequency required.

3. Additional bulk capacitance may be added to improve PSRR at low frequencies.

4. These capacitors serve as a charge reservoir for the internal switched capacitor ADC modulators and should be placed as

close as possible to the inputs. They are only needed when the PGA (Programmable Gain Amplifier) is bypassed.

5. Input pairs (such as AIN2A, AIN2REF and AIN2B) may be left floating if they are not used.

Note 4

Note 3

2 k

Low ESR, X7R/X5R dielectric capacitors.

Note 5

562

3300 pF

Rext

LPF is Optional

Line Level Out

Left & Right

3300 pF

Figure 1. Typical Connection Diagram

CS42L55

CS42L55 Datasheet(PDF) 10 Page - Cirrus Logic

CS42L55 Datasheet(HTML) 10 Page - Cirrus Logic

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73

Datasheet Download

Link URL