LM4946

SNAS335E – JANUARY 2006 – REVISED AUGUST 2007

www.ti.com

Electrical Characteristics 3.3V

(1) (2)

Symbol

Parameter

Conditions

LM4946

Units

Output Modes 2, 4, 6

3.25

mA

SE Headphone

Output Modes 1, 3, 5, 7

5.65

mA

SE Headphone

Output Modes 2, 4, 6

Supply Current

4

6.5

mA (max)

OCL Headphone

Output Modes 1, 3, 5,

5

mA

OCL Headphone

Output Modes 7

6.5

10.5

mA (max)

OCL Headphone

Shutdown Current

Output Mode 0

0.02

1

µA (max)

12

50

Mono

Output Offset Voltage

mV (max)

3

15

Headphones (Note 11)

540

500

mW (min)

THD+N = 1%; f = 1kHz, BTL, Mode 1

Output Power

35

30

mW (min)

THD+N = 1%; f = 1kHz, SE, Mode 4

f = 1kHz

0.05

%

THD+N

Total Harmonic Distortion + Noise

f = 1kHz

0.015

%

A-weighted,

inputs terminated to GND, output referred

Speaker; Mode 1

17

μV

Speaker; Mode 3, 7

27

μV

Speaker; Mode 5

33

μV

Headphone; SE, Mode 2

8

μV

Output Noise

Headphone; SE, Mode 4, 7

8

μV

Headphone; SE, Mode 6

12

μV

Headphone; OCL, Mode 2

8

μV

Headphone; OCL, Mode 4, 7

9

μV

Headphone; OCL, Mode 6

12

μV

(1)

Operating Ratings indicate conditions for which the device is functional, but do not ensure specific performance limits. For ensured

specifications and test conditions, see the Electrical Characteristics. The ensured specifications apply only for the test conditions listed.

Some performance characteristics may degrade when the device is not operated under the listed test conditions.

(2)

All voltages are measured with respect to the ground pin, unless otherwise specified.

(3)

Datasheet min/max specifications are specified by design, test, or statistical analysis.

(4)

Typical specifications are specified at +25°C and represent the most likely parametric norm.

(5)

Tested limits are specified to TI's AOQL (Average Outgoing Quality Level).

6

Submit Documentation Feedback

Copyright © 2006–2007, Texas Instruments Incorporated

Product Folder Links: LM4946