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OBSOLETE

LM4548

www.ti.com

SNOS441C – FEBRUARY 1999 – REVISED APRIL 2013

ELECTRICAL CHARACTERISTICS

(1) (2) (continued)

The following specifications apply for AVDD = 5V, DVDD = 5V, Fs = 48kHz, single codec configuration, unless otherwise noted.

Limits apply for TA= 25°C. The reference for 0dB is 1Vrms unless otherwise specified.

LM4548

Units

Symbol

Parameter

Conditions

Typical

Limit

(Limits)

(3)

(4)

AIDD

Analog Quiescent Power Supply Current

53

mA

IDSD

Digital Shutdown Current

500

µA

IASD

Analog Shutdown Current

30

µA

VREF

Reference Voltage

2.23

V

PSRR

Power Supply Rejection Ratio

40

dB

Analog Loopthru Mode

CD Input to Line Output, -60dB Input

Dynamic Range (5)

97

90

dB (min)

THD+N, A-Weighted

THD

Total Harmonic Distortion

VO = -3dB, f = 1kHz, RL = 10kΩ

0.01

0.02

% (max)

Analog Input Section

VIN

Line Input Voltage

1

Vrms

Mic Input with 20dB Gain

0.1

Vrms

Mic Input with 0dB Gain

1

Vrms

Xtalk

Crosstalk

CD Left to Right

-95

dB

ZIN

Input Impedance(5)

40

10

k

Ω (min)

CIN

Input Capacitance

15

pF

Interchannel Gain Mismatch

CD Left to Right

0.01

dB

Record Gain Amplifier - A/D

AS

Step Size

0dB to 22.5dB

1.5

dB

Mixer Section

AS

Step Size

+12dB to -34.5dB

1.5

dB

AM

Mute Attenuation

86

dB

Analog to Digital Converters

Resolution

18

Bits

Dynamic Range (6)

-60dB Input THD+N, A-Weighted

90

86

dB (min)

Frequency Response

-1dB Bandwidth

20

kHz

Digital to Analog Converters

Resolution

18

Bits

Dynamic Range (6)

-60dB Input THD+N, A-Weighted

89

85

dB (min)

THD

Total Harmonic Distortion

VIN = -3dB, f=1kHz, RL = 10kΩ

0.01

%

Frequency Response

20 - 21k

Hz

Group Delay (6)

2

mS (max)

Out of Band Energy

-40

dB

Stop Band Rejection

70

dB

DT

Discrete Tones

-96

dB

True Line Level Output Volume Section

AS

Step Size

0dB to -46.5dB

1.5

dB

AM

Mute Attenuation

86

dB

Digital I/O(6)

0.30 x

VIL

Low level input voltage

V (max)

DVDD

0.40 x

VHI

High level input voltage

V (min)

DVDD

(5)

These specifications are specified by design and characterization; they are not production tested.

(6)

These specifications are specified by design and characterization; they are not production tested.

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