LM4701 datasheet(3/15 Pages) NSC

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Electrical Characteristics (Continued)

(Notes 4, 5) The following specifications are for V

CC = +28V, VEE = −28V with RL = 8Ω, unless otherwise specified. Limits ap-

ply for T

A = 25˚C.

Symbol

Parameter

Conditions

LM4701

Units

(Limits)

Typical

Limit

(Note 9)

(Note 10)

CMRR (Note

Common Mode Rejection Ratio

CC = 35V to 10V, VEE = −10V to −35V,

110

dB (min)

CM = 10V to −10V, IO = 0mA

VOL (Note 2)

Open Loop Voltage Gain

L = 2kΩ, ∆VO = 30V

110

dB (min)

GBWP

Gain-Bandwidth Product

O = 100 kHz, VIN = 50 mVrms

7.5

MHz (min)

Input Noise

IHF — A Weighting Filter

2.0

µV (max)

(Note 3)

IN = 600Ω (Input Referred)

SNR

Signal-to-Noise Ratio

O = 1W, A-Weighted,

Measured at 1 kHz, R

S = 25Ω

O = 25W, A-Weighted

108

Measured at 1 kHz, R

S = 25Ω

Note 1: Operation is guaranteed up to 64V, however, distortion may be introduced from SPiKe Protection Circuitry if proper thermal considerations are not taken into

account. Refer to the Application Information section for a complete explanation.

Note 2: DC Electrical Test; Refer to Test Circuit #1.

Note 3: AC Electrical Test; Refer to Test Circuit #2.

Note 4: All voltages are measured with respect to the GND (pin 7), unless otherwise specified.

Note 5: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is func-

tional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guar-

antee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is

given, however, the typical value is a good indication of device performance.

Note 6: For operating at case temperatures above 25˚C, the device must be derated based on a 150˚C maximum junction temperature and a thermal resistance of

θJC = 1.8 ˚C/W (junction to case). Refer to the section, Determining the Correct Heat Sink, in the Application Information section.

Note 7: Human body model, 100 pF discharged through a 1.5 k

Ω resistor.

Note 8: The operating junction temperature maximum is 150˚C, however, the instantaneous Safe Operating Area temperature is 250˚C.

Note 9: Typicals are measured at 25˚C and represent the parametric norm.

Note 10: Limits are guarantees that all parts are tested in production to meet the stated values.

Note 11: VEE must have at least −9V at its pin with reference to ground in order for the under-voltage protection circuitry to be disabled. In addition, the voltage dif-

ferential between VCC and VEE must be greater than 14V.

Note 12: The output dropout voltage, VOD, is the supply voltage minus the clipping voltage. Refer to the Clipping Voltage vs. Supply Voltage graph in the Typical Per-

formance Characteristics section.

Note 13: Fora4

Ω load, and with ±20V supplies, the LM4701 can deliver typically 22 Watts of continuous average power per channel with less than 0.1% (THD+N).

With supplies above ±20V, the LM4701 cannot deliver more than 22 watts into 4

Ω due to current limiting of the output transistors. Thus, increasing the power supply

above ±20V will only increase the internal power dissipation, not the possible output power. Increased power dissipation will require a larger heat sink as explained

in the Application Information section.

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