Datasheet > LM49450_15

LM49450_15

更新时间： 2022-02-26 11:50:33

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
42页	1037K
描述
Boomer I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Referenced Headphone Amplifier, 3D Enhancement, and Headphone Sense

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LM49450_15 数据手册

LM49450

SNAS440D –FEBRUARY 2008–REVISED MAY 2013

www.ti.com

Electrical Characteristics V_DD= LSV_DD= 3.6V, HPV_DD= CPV_DD= 2.5V⁽¹⁾⁽²⁾(continued)

The following specifications apply for Headphone: A_V= 0dB, R_L(LS)= 8Ω, R_L(HP)= 32Ω, f = 1kHz, C₁= C₂= 2.2μF, unless

otherwise specified. Limits apply for T_A= 25°C.

LM49450

Typical⁽³⁾

Units

(Limits)

Symbol

Parameter

Conditions

Limit⁽⁴⁾

Input Referred, A-weighted

DAC Active, Internal Reference

DAC Active, External Reference

Line Inputs Active

43.5

45.4

μV

ε_OS

Output Noise

t_ON

Turn-On Time

Turn-Off Time

t_OFF

HEADPHONE AMPLIFIERS (Speaker Amplifiers Disabled, HPS = 1)

f_S= 48kHz, DAC active

Line Inputs Active

7.2

5.3

8.25

6.5

mA (max)

I_DDHP

V_OS

Analog Supply Current

Output Offset Voltage

DAC active, A_V= –6dB

Line Inputs Active, , A_V= –6dB

mV (max)

R_L= 16Ω, f = 1kHz

THD+N = 1%, Single Channel

THD+N = 1%, Two Channels in

Phase

P_O

Output Power

R_L= 32Ω, f = 1kHz

THD+N = 1%, Single Channel

mW (min)

THD+N = 1%, Two Channels in

Phase

f = 1kHz, DAC Active

THD+N

PSRR

Total Harmonic Distortion

R_L= 16Ω, P_O= 5mW

0.05

0.03

R_L= 32Ω, P_O= 5mW

V_RIPPLE= 200mV_P-P, f = 1kHz

DAC Active, Internal Reference

DAC Active, External Reference

Line Inputs Active

71.2

71.3

76.9

dB (min)

Power Supply Rejection Ratio

P_O= 5mW, f = 1kHz, R_L= 32Ω

DAC Active,

Line Inputs Active

Xtalk

Crosstalk

P_O= 5mW, f = 10kHz, R_L= 32Ω

DAC Active,

Line Inputs Active

P_O= 5mW, f = 1kHz, A-weighted

DAC Active, Internal Reference

DAC Active, External Reference

Line Inputs Active

102

SNR

A_V

Signal to Noise Ratio

Maximum Gain Setting, Line Inputs

Active

17.0

18.5

dB (min)

dB (max)

17.8

Digitally Controlled Gain Level

Mute Attenuation

Minimum Gain Setting, Line Inputs

Active

–56

–52

dB (min)

dB (max)

–53.8

–102

0.3

Mute

Line Inputs Active

Channel-to-Channel Gain

Matching

ΔA_CH-CH

Input Referred, A-weighted

DAC Active, Internal Reference

DAC Active, External Reference

Line Inputs Active

μV

ε_OS

Output Noise

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