Electrical Characteristics V

The following specifications apply for V

Ω unless otherwise specified. Limits apply for T

25˚C. (Continued)

Symbol

Parameter

Conditions

LM4991

Typical

(Note 7)

Limit

(Note 8)

Units

(Limits)

PSRR

Power Supply Rejection

Ratio

V

Input terminated with 10

Ω,

f = 1kHz

68

dB

Electrical Characteristics V

The following specifications apply for V

Ω unless otherwise specified. Limits apply for T

Symbol

Parameter

Conditions

LM4991

Typical

(Note 7)

Limit

(Note 8)

Units

(Limits)

I

DD

Quiescent Power Supply

Current

V

2

mA (max)

V

Ω

3

I

SD

Shutdown Current

V

0.1

µA(max)

V

SDIH

Shutdown Voltage Input High

1

V

V

SDIL

Shutdown Voltage Input Low

0.9

V

V

OS

Output Offset Voltage

5

35

mV (max)

P

o

Output Power

THD = 1% (max), f = 1kHz

R

Ω

R

Ω

400

300

mW

THD+N

Total Harmonic

Distortion+Noise

P

0.1

%

PSRR

Power Supply Rejection

Ratio

V

Input terminated with 10

Ω,

f = 1kHz

51

dB

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.

Note 3: All voltages are measured with respect to the ground pin, unless otherwise specified.

For the

Note 5: Human body model, 100pF discharged through a 1.5k

Ω resistor.

Note 6: Machine Model, 220pF–240pF discharged through all pins.

Note 7: Typicals are specified at 25˚C and represent the parametric norm.

Note 8: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).

Note 9: The given

Note 10: When driving 3

Ω or 4Ω loads from a 5V supply, the LM4991LD must be mounted to a circuit board.

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