LM49321RLSLASHNOPB datasheet(7/45 Pages) TI1

7 / 45 page

LM49321, LM49321RLEVAL

www.ti.com

SNAS457C – SEPTEMBER 2008 – REVISED MAY 2013

Audio Amplifier Electrical Characteristics AVDD = 5.0V, DVDD = 3.3V

(1) (2)

The following specifications apply for the circuit shown in Figure 41 with all programmable gain set at 0dB, unless otherwise

specified. Limits apply for TA = 25°C.

LM49321

Units

Parameter

Test Conditions

(Limits)

Typ(3)

Limits(4)

VIN = 0, No Load

17.5

mA (max)

All Amps On + DAC, OCL(5)

Headphone Mode Only, OCL, DAC Off

5.8

mA (max)

Headphone Mode Only, OCL, DAC Off

STEREO_OUTPUT_ONLY = 1,

5.5

STEREO_INPUT_ONLY = 1

IDD

Supply Current

Headphone Mode Only, OCL, DAC On,

OSR = 64, DAC_INPUT_ONLY = 1

9.5

STEREO_OUTPUT_ONLY = 1

Mono Loudspeaker Mode Only(5)

11.6

Mono Earpiece Mode Only(5)

DAC Off, All Amps On (OCL)(5)

12.9

ISD

Shutdown Current

See(6)

1.6

μA

Speaker; THD = 1%; f = 1kHz, 8

Ω BTL

1.25

Output Power

Headphone; THD = 1%; f = 1kHz, 32

Ω SE

Earpiece; THD = 1%; f = 1kHz, 32

Ω BTL

175

VFS DAC

Full Scale DAC Output

2.4

VRMS

Speaker; PO = 500mW; f = 1kHz, 8Ω BTL

0.03

THD+N

Total Harmonic Distortion + Noise

Headphone; PO = 30mW; f = 1kHz, 32Ω SE

0.01

Earpiece; PO = 40mW; f = 1kHz, 32Ω BTL

0.04

Speaker

VOS

Offset Voltage

Earpiece

HP (OCL)

∈O

Output Noise

A-weighted; 0dB gain;

Table 1

PSRR

Power Supply Rejection Ratio

f = 217Hz; Vripple = 200mVP-P, CB = 2.2μF

Table 3

XTALK

Crosstalk

Headphone; PO= 15mW, f = 1kHz; OCL

–56

CB = 2.2μF, CD_6 = 0

TWU

Wake-Up Time

CB = 2.2μF, CD_6 = 1

130

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of

device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or

other conditions beyond those indicated in the Recommended Operating Conditions is not implied. The Recommended Operating

Conditions indicate conditions at which the device is functional and the device should not be operated beyond such conditions. All

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

(2)

The Electrical Characteristics tables list specified 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.

(3)

Typical values represent most likely parametric norms at TA = +25ºC, and at the Recommended Operation Conditions at the time of

product characterization and are not ensured.

(4)

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

(5)

Enabling mono bit (MONO_ONLY in Output Control Register 01h) will save 400

μA (typ) form specified current.

(6)

Shutdown current is measured in a normal room environment.

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