User Manual

18 DS680F2
CS42L52
3/1/13
9. The PWM driver should be used in captive speaker systems only.
10. 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 R
L
= 16  C
L
= 10 pF (see Figure 2); “Required Initialization Settings”
on page 37 written on power up.
11. 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 R
DS(ON)
VP = 3.7V, I
d
= 0.5 A - 640 - m
MOSFET On Resistance R
DS(ON)
VP = 2.5V, I
d
= 0.5 A - 760 - m
Efficiency  VP = 5.0 V, P
O
= 2 x 0.8 W, R
L
= 8  -81-%
Output Operating Peak Current I
PC
--1.5A
VP Input Current During Reset I
VP
RESET, pin 32, is held low
-0.85.0µA
Parameters VA = 2.5V
Min Typ Max
VA = 1.8V
Min Typ Max
Unit
AOUTx Power Into R
L
= 16 
HP_GAIN[2:0] Analog Gain (G) VHP
000 0.3959 1.8 V - 14 - - 7 - mW
rms
2.5 V - 14 - - 7 - mW
rms
001 0.4571 1.8 V - 19 - - 10 - mW
rms
2.5 V - 19 - - 10 - mW
rms
010 0.5111 1.8 V - 23 - - 12 - mW
rms
2.5 V - 23 - - 12 - mW
rms
011 (default) 0.6047 1.8 V (Note 11) -17 -mW
rms
2.5 V - 32 - - 17 - mW
rms
100 0.7099 1.8 V (Note 11) -23 -mW
rms
2.5 V - 44 - - 23 - mW
rms
101 0.8399 1.8 V (Note 7), Figure 22 on page 74 mW
rms
2.5 V -32 -mW
rms
110 1.0000 1.8 V (Note 7, 11) See Figures 22 and 23 on page 74 mW
rms
2.5 V mW
rms
111 1.1430 1.8 V mW
rms
2.5 V mW
rms
Parameters (Note 10) Symbol Conditions Min Typ Max Units
AOUTx
AGND
R
L
C
L
0.022 F
51 
Figure 2. Headphone Output Test Load