CS43L22 datasheet(15/68 Pages) CIRRUS

15 / 68 page

DS792F1

CS43L22

Confidential Draft

10/7/08

VHP settings lower than VA reduces the headroom of the headphone amplifier. As a result, the DAC

may not achieve the full THD+N performance at full-scale output voltage and power.

LINE OUTPUT VOLTAGE LEVEL CHARACTERISTICS

Test conditions (unless otherwise specified): Input test signal is a full-scale 997 Hz sine wave; measurement bandwidth is 20 Hz

to 20 kHz; Sample Frequency = 48 kHz; Test load RL = 10 kΩ, CL = 10 pF (see Figure 2); “Required Initialization Settings” on

page 33 written on power up.

COMBINED DAC INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE

Parameters

VA = 2.5V

Min

Typ

Max

VA = 1.8V

Min

Typ

Max

Unit

AOUTx Voltage Into RL = 10 kΩ

HP_GAIN[2:0]

Analog

Gain (G)

VHP

000

0.3959

1.8 V

1.34

0.97

Vpp

2.5 V

1.34

0.97

Vpp

001

0.4571

1.8 V

1.55

1.12

Vpp

2.5 V

1.55

1.12

Vpp

010

0.5111

1.8 V

1.73

1.25

Vpp

2.5 V

1.73

1.25

Vpp

011 (default)

0.6047

1.8 V

2.05

1.41

1.48

1.55

Vpp

2.5 V

1.95

2.05

2.15

1.48

Vpp

100

0.7099

1.8 V

2.41

1.73

Vpp

2.5 V

2.41

1.73

Vpp

101

0.8399

1.8 V

2.85

2.05

Vpp

2.5 V

2.85

2.05

Vpp

110

1.0000

1.8 V

3.39

2.44

Vpp

2.5 V

3.39

2.44

Vpp

111

1.1430

1.8 V

(See (Note 8)

2.79

Vpp

2.5 V

3.88

2.79

Vpp

Parameters (Note 9)

Min

Typ

Max

Unit

Frequency Response 10 Hz to 20 kHz

-0.01

+0.08

Passband

to -0.05 dB corner

to -3 dB corner

0.4780

0.4996

StopBand

0.5465

AOUTx

AGND

0.022

µF

Ω

Figure 2. Headphone Output Test Load

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