Electrical Characteristics V

The following specifications apply for V

Ω load unless otherwise specified. Limits apply for T

25˚C. (Continued)

Note 1: All voltages are measured with respect to the ground pin, 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.

currents for additional information.

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

Ω resistor.

Note 5: Machine Model, 220pF–240pF discharged through all pins.

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

Note 7: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.

Note 9: Unterminated input.

Note 10: 10

Ω terminated input.

Note 11: When driving 4

Ω loads from a 5V supply, the LM4894LD must be mounted to a circuit board.

External Components Description

(Figure 1)

Components

Functional Description

1.

R

i

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

2.

R

f

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

3.

C

S

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.

4.

C

B

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 C

www.national.com

4