MAX9850ETI datasheet(4/36 Pages) MAXIM

Part #	MAX9850ETI

Description	Stereo Audio DAC with DirectDrive Headphone Amplifier

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Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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Stereo Audio DAC with DirectDrive

Headphone Amplifier

4

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(DVDD = AVDD = PVDD = 3.0V, AGND = DGND = PGND = 0V, C1 = 0.47µF, C2 = 2.2µF, CNREG = CPREG = CREF = 1µF to AGND,

RLOAD_HP = 32

Ω to AGND, RLOAD_OUT = 10kΩ to AGND, fLRCLK = 48kHz, fMCLK = 12.288MHz, volume set to -9.5dB, TA = TMIN to

TMAX, unless otherwise noted. Typical specifications at TA = +25°C, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

HEADPHONE OUTPUTS (HPL, HPR)

RL = 16

Ω

AVDD = 3.0V

95

RL = 32

Ω

AVDD = 3.0V

40

65

RL = 16

Ω

AVDD = 1.8V

30

Output Power

OUT

THD+N = 1%

fIN = 1kHz, headphone

volume = +6dB

RL = 32

Ω

AVDD = 1.8V

15

25

mW

Full-Scale Headphone Amplifier

Output Voltage

VOUT_FS

Volume = +5dB, HP unloaded

1.16

1.23

1.30

VRMS

Line In to HP Output Voltage

Gain

AV_HP

Volume = +3dB, HP unloaded

1.34

1.41

1.48

V/V

RL = 32

Ω, POUT = 60mW, fIN = 1kHz

-94

Total Harmonic Distortion Plus

Noise

THD+N

RL = 16

Ω, POUT = 60mW, fIN = 1kHz

-90

dB

Unweighted

88

A-weighted

90

AVDD = 1.8V, unweighted

88

Signal-to-Noise Ratio (Note 5)

SNR

AVDD = 1.8V, A-weighted

91

dB

VRIPPLE = 100mVP-P, frequency = 1kHz,

applied to AVDD and PVDD

91

Power-Supply Rejection Ratio

PSRR

VRIPPLE = 100mVP-P, frequency = 20kHz,

applied to AVDD and PVDD

72

dB

Headphone Output Offset

Voltage

VOS_HP

Volume = -11.5dB

-20

0

+20

mV

Slew Rate

SR

0.47

V/µs

Maximum Capacitive Load

CL

No sustained oscillations

150

pF

Crosstalk

XTALK

RHP = 32

Ω, POUT = 3.5mW, fIN = 1kHz

(HPL to HPR) or (HPR to HPL)

-85

dB

Channel-to-Channel Gain

Matching

∆AV/AV

±0.05

dB

Internal Charge-Pump Oscillator

Frequency

fCP

550

667

775

kHz

Charge-Pump Operating

Frequency Range

Charge-pump clock derived from MCLK

550

775

kHz

Volume Control Range

-73.5

+6.0

dB

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