2 x 1.5W, Stereo Class D Audio Subsystem

with DirectDrive Headphone Amplifier

_______________________________________________________________________________________

3

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SPEAKER AMPLIFIERS

TA = +25°C

±5.5

±23.5

Output Offset Voltage

VOS

TMIN

≤ TA ≤ TMAX

±40

mV

Into shutdown

-62

Out of shutdown

-60

Into mute

-63

Click-and-Pop Level

KCP

Peak voltage,

TA = +25°C,

A-weighted, 32

samples per second

(Notes 2, 3)

Out of mute

-62

dB

VDD = 2.7V to 5.5V

48

70

f = 217Hz,

100mVP-P ripple

68

f = 1kHz,

100mVP-P ripple

60

Power-Supply Rejection Ratio

(Note 3)

PSRR

TA = +25°C

f = 20kHz,

100mVP-P ripple

50

dB

RL = 4

Ω, VDD = 5V

1500

RL = 8

Ω, VDD = 3.3V

450

Output Power (Note 4)

POUT

THD+N = 1%,

TA = +25°C

RL = 8

Ω, VDD = 5V

1115

mW

Current Limit

1.6

A

RL = 8

Ω,

POUT = 125mW

0.03

Total Harmonic Distortion Plus

Noise (Note 4)

THD+N

f = 1kHz

RL = 4

Ω,

POUT = 250mW

0.04

%

BW = 20Hz to 20kHz

81

Signal-to-Noise Ratio

SNR

VOUT = 1.8VRMS,

RL = 8

Ω, 3D not

active (Note 3)

A-weighted

84

dB

Fixed-frequency modulation

1100

Output Frequency

fOSC

Spread-spectrum modulation

1100 ±30

kHz

Efficiency

η

POUT = 470mW, f = 1kHz both channels

driven, L = 68µH in series with 8

Ω load

79

%

Gain

AV

12

dB

Channel-to-Channel Gain

Tracking (Note 5)

TA = +25°C

±1

%

3D Sound Resistors (Note 5)

R3D

Used with 22nF and 2.2nF external

capacitors

57

9

k

Ω

Crosstalk (Notes 4, 5)

L to R, R to L, f = 10kHz, RL = 8

Ω,

VOUT = 300mVRMS

73

dB

ELECTRICAL CHARACTERISTICS (continued)

(VDD = PVDD = CPVDD = 3.3V, VGND = VPGND = VCPGND = 0V, SHDN = VDD, I2C settings (INA gain = +20dB, INB gain = INC gain =

0dB, volume setting = 0dB, mono path gain = 0dB, SHDN = 1, SSM = 1). Speaker load resistors (RLSP) are terminated between

OUT_+ and OUT_-, headphone load resistors are terminated to GND, unless otherwise noted. C1 = C2 = C3 = 1µF. TA = TMIN to

TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)