LM4865

SNAS035G – DECEMBER 1999 – REVISED MAY 2013

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ELECTRICAL CHARACTERISTICS

(1) (2)

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

LM4865

Symbol

Parameter

Conditions

Min(3)

Typical(4)

Max(3)

Units

VDD

Supply Voltage

2.7

5.5

V

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

4

7

mA

IDD

Quiescent Power Supply Current

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

3.5

6

mA

ISD

Shutdown Current

VPIN4 ≤ 0.3V

0.7

µA

VOS

Output Offset Voltage

VIN = 0V

5

50

mV

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

500

750

mW

1kHz, RL = 8Ω

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

1.0

W

1kHz, RL = 8Ω

PO

Output Power

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

80

mW

f = 1kHz, RL = 32Ω

THD = 10%, HP Sense > 4V,

110

mW

f = 1kHz, RL = 32Ω

PO = 300 mWrms, f = 20Hz–20kHz, RL =

THD+N

Total Harmonic Distortion + Noise

0.6

%

8

Ω

VRIPPLE = 200mVrms, RL = 8Ω, CB = 1.0

PSRR

Power Supply Rejection Ratio

50

dB

µF, f = 1kHz

Gain with VPIN4 ≥ 4.0V, (80% of VDD)

18.8

20

dB

GainRANGE

Single-Ended Gain Range

Gain with VPIN4 ≤ 0.9V, (18% of VDD)

−70

−72

dB

VIH

HP Sense High Input Voltage

4

V

VIL

HP Sense Low Input Voltage

0.8

V

(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 3 )

Components

Functional Description

1.

Ci

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

the internal Ri. The designer should note that10kOhm<(Ri)<110kOhm.Therefore fc = 1/(2πRiCi). Refer to the section,

PROPERLY SELECTING EXTERNAL COMPONENTS , for an explanation of how to determine the value of Ci.

2.

CS

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.

3.

CB

Bypass pin capacitor which provides half-supply filtering. Refer to the section, PROPERLY SELECTING EXTERNAL

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

4

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