LM49250 datasheet(8/36 Pages) TI1

Teilenummer	LM49250

Bauteilbeschribung	Enhanced Emissions Suppression Stereo Class D Audio Sub-System with Ground Referenced Headphone Amplifier and Mono Earpiece

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Hersteller	TI1 [Texas Instruments]

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8 / 36 page

LM49250

SNAS406C – JANUARY 2008 – REVISED MAY 2013

www.ti.com

Electrical Characteristics

(1)(2) (continued)

The following specifications apply for VDD = VDD(LS) = VDD(CP) = 3.6V, all selectable gains = 0dB, RL(LS) = 8Ω (Note 8), RL(HP) =

32

Ω, RL(EP) = 32Ω, f = 1kHz and the conditions shown in the "Typical Application Circuit” unless otherwise specified. Limits

apply for TA = 25°C.

LM49250

Units

Parameter

Tests Conditions

(Limits)

Typ(3)

Limit(4)

Single-Ended Inputs, VRIPPLE = 200mVP-P

HP (output mode 2, 3)

f = 217Hz

84

dB

f = 1kHz

81

dB

LS (output mode 2)

PSRR

Power Supply Rejection Ratio

f = 217Hz

69.1

dB

f = 1kHz

68.1

dB

EP (output mode 2)

f = 217Hz

78

dB

f = 1kHz

76

dB

Control Interface Electrical Characteristics

(1) (2)

The following specifications apply for 2.7V

≤ VDD ≤ 5.5V, and 1.7V ≤ I

2CV

DD ≤ 2.2V, unless otherwise specified. Limits apply

for TA = 25°C.

LM49250

Units

Parameter

Test Conditions

(Limits)

Typ(3)

Limit(4)

t1

SCL Period

2.5

μs (min)

t2

SDA Set-up Time

250

ns (min)

t3

SDA Stable Time

0

ns (min)

t4

Start Condition Time

250

ns (min)

t5

Stop Condition Time

250

ns (min)

t6

SDA Hold time

250

ns (min)

VIH

Digital Input High Voltage

0.7*I2CVDD

V (min)

VIL

Digital Input Low Voltage

0.3*I2CVDD

V (max)

RESETIH

Reset Input High Voltage

1.6

V (min)

RESETIL

Reset Input Low Voltage

0.6

V (max)

(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 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.

(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.

The following specifications apply for 2.7V

≤ VDD ≤ 5.5V, and 2.2V ≤ I

2CV

DD ≤ 5.5V, unless otherwise specified. Limits apply

for TA = 25°C.

LM49250

Units

Parameter

Test Conditions

(Limits)

Typ(1)

Limit(2)

t1

SCL Period

2.5

μs (min)

t2

SDA Set-up Time

100

ns (min)

t3

SDA Stable Time

0

ns (min)

(1)

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.

(2)

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

8

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