LM4953 datasheet(4/11 Pages) NSC

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Electrical Characteristics V

DD = 3.0V (Continued)

The following specifications apply for V

DD = 3.0V, AV-BTL = 6dB, ZL = 2µF+30

Ω unless otherwise specified. Limits apply to T

A =

25˚C. See Figure 1.

Symbol

Parameter

Conditions

LM4953

Units (Limits)

Typ

(Note 6)

Limit

(Notes 7, 8)

SDIL

Shutdown Voltage Input Low

SD1

SD2

0.3*CPVdd

V (max)

Wake-up Time

125

µsec

Output Offset Voltage

mV (max)

OUT

Output Voltage Swing

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

L = 2µF+30

Ω, Mono BTL

10.2

Vpp

THD+N

Total Harmonic Distortion +

Noise

OUT = 8.5Vp-p, fIN = 1kHz

0.02

∈

Output Noise

A-Weighted Filter, V

IN =0V

µV

PSRR

Power Supply Rejection

Ratio

RIPPLE = 200mVp-p, f = 217Hz,

Input Referred

RIPPLE = 200mVp-p, f = 1kHz,

Input Referred

SNR

Signal-to-Noise Ratio

L = 2µF+30

Ω,V

OUT = 8.5Vp-p

105

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 that

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 LM4xxx typical application

(shown in Figure 1) with VDD = yyV, RL = 2µF+30Ω mono BTL operation the total power dissipation is xxxW. θJA = 40˚C/W.

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 3.6V (to a max of 4V 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 4V, circuit performance will

be curtailed or the part may be permanently damaged.

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