LM49450

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SNAS440D – FEBRUARY 2008 – REVISED MAY 2013

(1) (2)

LM49450

Units

Symbol

Parameter

Conditions

(Limits)

Digital Core Supply Current

9

11.2

mA (max)

Digital Current

0.03

1

μA (max)

Shutdown Supply Current

Analog Current

0.02

1

μA (max)

SPEAKER AMPLIFIERS (Headphone Amplifiers Disabled, HPS = 0)

9.8

13

mA (max)

Analog Supply Current

Line Inputs Active, No Load

7

10

mA (max)

DAC Active

8

45

mV (max)

Output Offset Voltage

Line Inputs Active

8

mV (max)

THD+N = 1%

1

W

THD+N = 10%

1.2

W

Output Power

THD+N = 1%

625

525

mW (min)

THD+N = 10%

725

W

THD+N

Total Harmonic Distortion

DAC Active

0.06

%

Line Inputs Active

0.07

%

DAC Active, Internal Reference

59

45

dB (min)

PSRR

Power Supply Rejection Ratio

DAC Active, External Reference

62

dB

Line Inputs Active

67

dB

η

Efficiency

87

%

DAC Active,

81

dB

Line Inputs Active

77

dB

Xtalk

Crosstalk

DAC Active,

60

dB

Line Inputs Active

60

dB

DAC Active, Internal Reference

89

dB

SNR

Signal to Noise Ratio

DAC Active, External Reference

92

dB

Line Inputs Active

90

dB

Maximum Gain Setting, Line Inputs

22.5

dB (min)

23.6

Active

24.1

dB (max)

Digitally Controlled Gain Level

Minimum Gain Setting, Line Inputs

–49

dB (min)

–48

Active

–46

dB (max)

Mute

Mute Attenuation

Line Inputs Active

–91

dB

Channel-to-Channel Gain

0.3

dB

Matching

(1)

The Electrical Characteristics tables list ensured specifications under the listed Recommended Operating Conditions except as

otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and

are not ensured.

(2)

= 4

Ω, the load is 15µH + 4Ω + 15µH.

(3)

product characterization and are not ensured.

(4)

Datasheet min/max specification limits are specified by test or statistical analysis.

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