LM4910 datasheet(4/22 Pages) NSC

4 / 22 page

Electrical Characteristics V

DD = 2.6V (Notes 1, 2)

The following specifications apply for V

DD = 2.6V, AV = 1, and 32

Ω load unless otherwise specified. Limits apply to T

A = 25˚C.

Symbol

Parameter

Conditions

LM4910

Units

(Limits)

Typ

(Note 6)

Limit

(Notes 7,

Quiescent Power Supply Current

IN = 0V, 32

Ω Load

3.0

mA (max)

Standby Current

SHUTDOWN = GND

0.1

µA (max)

Output Offset Voltage

mV (max)

Output Power

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

THD+N

Total Harmonic Distortion + Noise P

O = 10mWrms; f = 1kHz

0.3

PSRR

Power Supply Rejection Ratio

RIPPLE = 200mVp-p sinewave

Input terminated with 10

Ω to ground

55 (f =

217Hz)

55 (f =

1kHz)

Note 1: All voltages are measured with respect to the GND 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.

Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature, TA. The maximum

allowable power dissipation is PDMAX =(TJMAX -TA)/ θJA or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4910, see power derating

currents for more 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: 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: If the product is in shutdown mode and VDD exceeds 6V (to a max of 8V VDD) then most of the excess current will flow through the ESD protection circuits.

If the source impedance limits the current to a max of 10ma then the part will be protected. If the part is enabled when VDD is above 6V circuit performance will be

curtailed or the part may be permanently damaged.

Note 10: Human body model, 100pF discharged through a 1.5k

Ω resistor, Pin 6 to ground.

External Components Description (Figure 1)

Components

Functional Description

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

f. This resistor also forms a

high-pass filter with C

i at fc = 1/(2

πR

iCi).

Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a

high-pass filter with R

i at fc = 1/(2

πR

iCi). Refer to the section Proper Selection of External Components, for

an explanation of how to determine the value of C

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

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.

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