LM4898MMBD datasheet(4/23 Pages) TI1

4 / 23 page

LM4898, LM4898MMBD

SNAS216D – MAY 2004 – REVISED MAY 2004

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Electrical Characteristics VDD = 3V

(1) (2) (3)

The following specifications apply for VDD = 3V, 8Ω load and AV = 1V/V, unless otherwise specified. Limits apply for TA =

25°C.

LM4898

Units

Parameter

Test Conditions

(Limits)

Typ(4)

Limit(5)

IDD

Quiescent Power Supply Current

VIN = 0V, no load

2.5

5 .5

mA (max)

VIN = 0V, RL = 8 Ω

ISD

Shutdown Current

VSDMODE = VSHUTDOWN = GND

0.1

µA (max)

Output Power

THD = 1% (max); f = 1kHz LM4898,

0.35

RL = 8

Ω

THD+N

Total Harmonic Distortion+Noise

Po = 0.25Wrms; f = 1kHz

0.03

PSRR

Power Supply Rejection Ratio

Vripple = 200mV sine p-p

f = 217Hz (6)

f = 1kHz (6)

f = 217Hz (7)

f = 1kHz (7)

CMRR

Common-Mode Rejection Ratio

f = 217Hz

VCM = 200mVPP

VOS

Output Offset

VIN = 0V

VSDIH

Shutdown Voltage Input High

SD Mode = GND

0.8

VSDIL

Shutdown Voltage Input Low

SD Mode = GND

0.6

VSDIH

Shutdown Voltage Input High

SD Mode = VDD

0.8

VSDIL

Shutdown Voltage Input Low

SD Mode = VDD

0.6

(1)

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

(2)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is functional, but do not ensure specific performance limits. Electrical Characteristics VDD = 3V state DC and AC

electrical specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within

the Operating Ratings. Specifications are not specified for parameters where no limit is given, however, the typical value is a good

indication of device performance.

(3)

For DSBGA only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase ISD by a

maximum of 2µA.

(4)

Typicals are measured at 25°C and represent the parametric norm.

(5)

Datasheet min/max specification limits are specified by design, test, or statistical analysis.

(6)

Unterminated input.

(7)

Ω terminated input.

External Components Description

(See Figure 4)

Components

Functional Description

Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing section for

information concerning proper placement and selection of the supply bypass capacitor.

Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of External

Components, for information concerning proper placement and selection of CB.

Inverting input resistance which sets the closed-loop gain in conjunction with Rf.

Feedback resistance which sets the closed-loop gain in conjunction with Ri.

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