LM4875MSLASHNOPB datasheet(3/21 Pages) TI

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LM4875

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SNAS042C – JANUARY 2002 – REVISED MAY 2013

ELECTRICAL CHARACTERISTICS

(1) (2)

The following specifications apply for VDD = 5V, unless otherwise specified. Limits apply for TA = 25°C.

LM4875

Symbol

Parameter

Conditions

Min(3)

Typical(4)

Max(3)

Units

VDD

Supply Voltage

2.7

5.5

VIN = 0V, IO = 0A, HP Sense = 0V

IDD

Quiescent Power Supply Current

VIN = 0V, IO - 0A, HP Sense = 5V

3.5

ISD

Shutdown Current

VPIN4 ≤ 0.3V

0.7

µA

VOS

Output Offset Voltage

VIN = 0V

THD = 1% (max), HP Sense < 0.8V, f =

500

750

1kHz, RL = 8Ω

THD = 10% (max), HP Sense < 0.8V, f =

1.0

1kHz, RL = 8Ω

Output Power

THD + N = 1%, HP Sense > 4V,

f = 1kHz, RL = 32Ω

THD = 10%, HP Sense > 4V,

110

f = 1kHz, RL = 32Ω

PO = 300 mWrms, f = 20Hz–20kHz, RL =

THD+N

Total Harmonic Distortion + Noise

0.6

Ω

VRIPPLE = 200mVrms, RL = 8Ω, CB = 1.0

PSRR

Power Supply Rejection Ratio

µF, f = 1kHz

Gain with VPIN4 ≥ 4.0V, (80% of VDD)

18.8

GainRANGE

Single-Ended Gain Range

Gain with VPIN4 ≤ 0.9V, (20% of VDD)

−70

−72

VIH

HP Sense High Input Voltage

VIL

HP Sense Low Input Voltage

0.8

(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 state DC and AC electrical

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

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

indication of device performance.

(3)

Limits are ensured to AOQL (Average Outgoing Quality Level).

(4)

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

EXTERNAL COMPONENTS DESCRIPTION

(Figure 1)

Components

Functional Description

Input coupling capacitor blocks DC voltage at the amplifier's input terminals. It also creates a highpass filter with the

internal Ri that produces an fc = 1/(2πRiCi) (10kΩ ≤ Ri ≤ 100kΩ). Refer to the APPLICATION INFORMATION section,

PROPERLY SELECTING EXTERNAL COMPONENTS, for an explanation of determining the value of Ci.

The supply bypass capacitor. Refer to the POWER SUPPLY BYPASSING section for information about properly placing,

and selecting the value of, this capacitor.

The capacitor, CB, filters the half-supply voltage present on the BYPASS pin. Refer to the APPLICATION INFORMATION

Section,PROPERLY SELECTING EXTERNAL COMPONENTS, for information concerning proper placement and selecting

CB's value.

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