CS43L22 datasheet(14/66 Pages) CIRRUS

14 / 66 page

DS792F2

CS43L22

Confidential Draft

3/4/10

The PWM driver should be used in captive speaker systems only.

Optimal PWM performance is achieved when MCLK > 12 MHz.

HEADPHONE OUTPUT POWER CHARACTERISTICS

Test conditions (unless otherwise specified): Input test signal is a full-scale 997 Hz sine wave; Sample Frequency = 48 kHz;

Measurement Bandwidth is 20 Hz to 20 kHz; Test load RL = 16 Ω, CL = 10 pF (see Figure 2); “Required Initialization Settings”

on page 32 written on power up.

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.

MOSFET On Resistance

RDS(ON)

VP = 2.5V, Id = 0.5 A

760

Efficiency

VP = 5.0 V, PO = 2 x 0.8 W, RL =

-81

Output Operating Peak Current

IPC

1.5

VP Input Current During Reset

IVP

RESET, pin 32, is held low

-0.8

5.0

µA

Parameters

VA = 2.5V

Min

Typ

Max

VA = 1.8V

Min

Typ

Max

Unit

AOUTx Power Into RL = 16 Ω

HP_GAIN[2:0]

Analog

Gain (G)

VHP

000

0.3959

1.8 V

mWrms

2.5 V

mWrms

001

0.4571

1.8 V

mWrms

2.5 V

mWrms

010

0.5111

1.8 V

mWrms

2.5 V

mWrms

011 (default)

0.6047

1.8 V

(Note 8)

mWrms

2.5 V

mWrms

100

0.7099

1.8 V

(Note 8)

mWrms

2.5 V

mWrms

101

0.8399

1.8 V

(Note 4) See Figure 18 on

page 59

mWrms

2.5 V

mWrms

110

1.0000

1.8 V

(Note 4, 8) See Figures 18 and 19 on page 59

mWrms

2.5 V

mWrms

111

1.1430

1.8 V

mWrms

2.5 V

mWrms

Parameters (Note 7)

Symbol

Conditions

Min

Typ

Max

Units

AOUTx

AGND

0.022

μF

Figure 2. Headphone Output Test Load

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