LM4545VH datasheet(3/16 Pages) NSC

3 / 16 page

Electrical Characteristics (Notes 1, 3) (Continued)

The following specifications apply for AV

DD = 5V, DVDD = 5V unless otherwise noted. Limits apply for TA= 25˚C. The reference

for 0dB is 1Vrms unless otherwise specified.

Symbol

Parameter

Conditions

LM4545

Units

(Limits)

Typical

(Note 7)

Limit

(Note 8)

Analog to Digital Converters

Dynamic Range (Note 2)

-60dB Input THD+N, A-Weighted

dB (min)

Frequency Response

-1dB Bandwidth

kHz

Digital to Analog Converters

Resolution

Bits

Dynamic Range (Note 2)

-60dB Input THD+N, A-Weighted

dB (min)

THD

Total Harmonic Distortion

IN = -3dB, f=1kHz, RL = 10kΩ

0.01

0.03

% (max)

Frequency Response

-1dB Bandwidth

kHz

Group Delay (Note 2)

mS (max)

Out of Band Energy

-40

Stop Band Rejection

Discrete Tones

-96

Output Volume and Amplifier Section

Step Size

0dB to -46.5dB

1.5

Mute Attenuation

THD+N

Headphone Amplifier Total Harmonic

Distortion plus Noise

Loopthru Mode, R

L =32Ω, f=1kHz,

OUT = 50mW

0.02

Digital I/O (Note 2)

Low level input voltage

0.30 x

DVDD

V (max)

High level input voltage

0.40 x

DVDD

V (min)

High level output voltage

0.50 x

DVDD

V (min)

Low level output voltage

0.20 x

DVDD

V (max)

Input Leakage Current

AC Link inputs

±10

µA (max)

Tri state Leakage Current

High impedance AC Link outputs

±10

µA (max)

Output drive current

AC Link outputs

Digital Timing Specifications (Note 2)

BIT_CLK frequency

12.288

MHz

BCP

BIT_CLK period

81.4

BIT_CLK high

Variation of BIT_CLK period from 50%

duty cycle

±20

% (max)

SYNC

SYNC frequency

kHz

SYNC period

20.8

µS

SYNC high pulse width

1.3

µS

SYNC low pulse width

19.5

µS

SETUP

Setup Time

SDATA_IN, SDATA_OUT to falling

edge of BIT_CLK

nS (min)

HOLD

Hold Time

Hold time of SDATA_IN, SDATA_OUT

from falling edge of BIT_CLK

nS (min)

RISE

Rise Time

BIT_CLK, SYNC, SDATA_IN or

SDATA_OUT

nS (max)

FALL

Fall Time

BIT_CLK, SYNC, SDATA_IN or

SDATA_OUT

nS (max)

RST_LOW

RESET# active low pulse width

For cold reset

1.0

µS (min)

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