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MAX9877AERP

Low RF Susceptibility, Mono Audio Subsystem with DirectDrive Headphone Amplifier

Maxim Integrated 

Low RF Susceptibility, Mono Audio

Subsystem with DirectDrive Headphone Amplifier

ELECTRICAL CHARACTERISTICS (continued)

(VDD = PVDD = 3.7V, VGND = VPGND = 0V. Single-ended inputs, preamp gain = 0dB, volume controls = 0dB, OSC = 00, BYPASS = 0,

SHDN = 1. Speaker loads (ZSPK) connected between OUT+ and OUT-. Headphone loads (RHP) connected from HPL or HPR to GND.

SDA and SCL pullup voltage = 3.3V. ZSPK = ∞, RHP = ∞. C1 = C2 = CBIAS = 1µF. TA = TMIN to TMAX, unless otherwise noted. Typical

values are at TA = +25°C.) (Note 3)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Output Frequency

Current Limit

Efficiency

Speaker Gain

Output Noise

Spread-spectrum modulation mode,

OSC = 00

Fixed-frequency mode, OSC = 01

Fixed-frequency mode, OSC = 10

η

POUT = 600mW, f = 1kHz

AV

A-weighted, OUTMODE = 1, ∆IN_ = 0

(Note 4)

1176

±60

kHz

1100

700

1.5

A

87

%

11.5 12.0 12.5

dB

63

µVRMS

HEADPHONE AMPLIFIERS (OUTMODE = 2)

Output Offset Voltage

VOS

Click-and-Pop Level

KCP

TA = +25°C (volume at mute)

TA = +25°C (volume at 0dB)

Peak voltage, TA =

+25°C, A-weighted,

Into shutdown

32 samples per

second. volume at

mute (Note 4)

Out of shutdown

±0.15 ±0.6

mV

±1.6

-80

dBV

-80

PVDD = VDD = 2.7V

70

85

to 5.25V

f = 217Hz,

84

Power-Supply Rejection Ratio

(Note 4)

PSRR

TA = +25°C, PVDD =

VDD

VRIPPLE = 100mVP-P

f = 1kHz,

80

dB

VRIPPLE = 100mVP-P

Output Power

Headphone Gain

Channel-to-Channel Gain

Tracking

Total Harmonic Distortion Plus

Noise

Signal-to-Noise Ratio

f = 20kHz,

62

VRIPPLE = 100mVP-P

POUT

AV

THD+N ≤ 1%

RHP = 16Ω

RHP = 32Ω

53

mW

27

-0.4

0

+0.4

dB

TA = +25°C, HPL to HPR, volume at 0dB,

OUTMODE = 2, 5; ∆IN_ = 0

±0.3 ±2.5

%

THD+N

RHP = 32Ω (POUT = 10mW, f = 1kHz)

RHP = 16Ω (POUT = 10mW, f = 1kHz),

TA = +25°C

0.016

%

0.03

A-weighted,

OUTMODE = 2, 3,

∆IN_ = 0

(single-ended)

98

5, 6; RHP = 16Ω

∆IN_ = 1 (differential)

98

SNR

dB

A-weighted, RHP = ∆IN_ = 0

96

16Ω, OUTMODE = (single-ended)

8, 9

∆IN_ = 1 (differential)

96

4 _______________________________________________________________________________________

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