The following specifications apply for V

Ω unless otherwise specified.

Limits apply for T

Symbol

Parameter

Conditions

LM4781

Units

(Limits)

Typical

Limit

(Note 6)

(Notes 7, 8)

CMRR

Common Mode Rejection Ratio

(Note 15)

V

V

110

75

dB (min)

A

VOL

Open Loop Voltage Gain

|V

Ω

∆V

115

80

dB (min)

GBWP

Gain Bandwidth Product

|V

V

8

2

MHz (min)

e

IN

Input Noise

IHF-A-Weighting Filter,

R

Ω (Input Referred)

3.0

8

µV (max)

SNR

Signal-to-Noise Ratio

P

f

Ω

93

dB

P

f

Ω

107

dB

IMD

Intermodulation Distortion

60Hz, 7kHz, 4:1 (SMPTE)

60Hz, 7kHz, 1:1 (SMPTE)

0.004

0.006

%

%

Note 1: All voltages are measured with respect to the ground pins, unless otherwise specified.

Note 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 guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which

guarantee 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.

and the typical

Note 4: Human body model, 100pF discharged through a 1.5k

Ω resistor.

Note 5: Machine Model: a 220pF - 240pF discharged through all pins.

Note 6: Typical specifications are measured at 25˚C and represent the parametric norm.

Note 7: Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).

Note 8: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.

Note 9: The maximum operating junction temperature is 150˚C. However, the instantaneous Safe Operating Area temperature is 250˚C.

Note 11: Cross talk performance was measured using the demo board shown in the datasheet. PCB layout will affect cross talk. It is recommended that the input

and output traces be separated by as much distance as possible. Return ground traces from outputs should also be independent back to sinlge ground point and

use as wide of traces as possible.

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

Performance Characteristics section.

only thermal compound. If a mica washer is used in addition to thermal compound,

Note 15: DC electrical test.

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