LP3921

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SNVS580A – AUGUST 2008 – REVISED MAY 2013

Audio Electrical Characteristics

Unless otherwise noted, VDD= 3.6V Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in

boldface type apply over the entire junction temperature range for operation, TA= TJ = −25°C to +85°C.

(1)

Limit

Symbol

Paramater

Conditions

Typical

Units

Min

Max

PO

Output Power

THD = 1% (max);

0.375

W

f = 1 kHz, RL = 8Ω

THD + N

Total Harmonic Distortion

PO = 0.25 Wrms;

0.02

%

+ Noise

f = 1 kHz

Vripple = 200 mVPP

Power Supply Rejection

PSRR

f = 217 Hz

85

dB

Ratio

f = 1 kHz

85

73

CMRR

Common-Mode Rejection

f = 217 Hz,

50

dB

Ratio

VCM = 200 mVPP

VOS

Output Offset

VacINput = 0V

4

mV

(1)

All limits are verified. All electrical characteristics having room-temperature limits are tested during production with TJ = 25°C. All hot and

cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying statistical process

control.

Serial Interface

Unless otherwise noted, VIN ( = VIN1 = VIN2 = BATT=VDD) = 3.6V, GND = 0V, CVIN1-2=10 µF, CLDOX=1 µF, and VLDO2 (DIGI)

≥ 1.8V. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over

the entire junction temperature range for operation, TA= TJ = −40°C to +125°C.

(1) (2)

Limit

Symbol

Parameter

Condition

Typ

Units

Min

Max

fCLK

Clock Frequency

400

kHz

tBF

Bus-Free Time between

1.3

µs

START and STOP

tHOLD

Hold Time Repeated START

0.6

µs

Condition

tCLK-LP

CLK Low Period

1.3

µs

tCLK-HP

CLK High Period

0.6

µs

tSU

Set-Up Time Repeated

0.6

µs

START Condition

tDATA-HOLD

Data Hold Time

50

ns

tDATA-SU

Data Set-Up Time

100

ns

tSU

Set-Up Time for STOP

0.6

µs

Condition

tTRANS

Maximum Pulse Width of

50

ns

Spikes that Must be

Suppressed by the Input

Filter of both DATA & CLK

Signals

(1)

All limits are verified. All electrical characteristics having room-temperature limits are tested during production with TJ = 25°C. All hot and

cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying statistical process

control.

(2)

Specified by design.

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