LM4830M datasheet(4/14 Pages) NSC

4 / 14 page

Electrical Characteristics (Notes 1, 2) (Continued)

The following specifications apply for V

DD= 5V, unless otherwise specified. Limits apply for TA= 25˚C.

Symbol

Parameter

Conditions

LM4830

Units

(Limits)

Typical

Limit

(Note 6)

(Note 7)

PREAMP, A2

Xtalk

Crosstalk

VCL = 100, Power Amp: PO = 1W,

L = 8Ω,f = 1 kHz

−72

PSRR

Power Supply Rejection Ratio

DDAC = 0.5 VPP,f = 1 kHz

MICROPHONE BUFFER, A3

Buffer Input Resistance

Ω

Output Offset Voltage

IN = 0V

2.0

Input Noise

IHF-A Weighting Filter, R

S = 25Ω

5.8

µV

THD

Total Harmonic Distortion

O = 50 mW, f = 1 kHz, RL = 32Ω

0.5

Xtalk

Crosstalk

Power Amp: P

O = 1W, RL = 8Ω,f = 1 kHz

−76

Note 1: All voltages are measured with respect to the ground pins (Pins 2, 15, and 24), 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 func-

tional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guar-

antee 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, θ JA, and the ambient temperature, TA. The maximum

allowable power dissipation is PDMAX = (TJMAX −T A)/θJA or the number given in the Absolute Maximum Ratings, whichever is lower. For the LM4830M, TJMAX =

+150˚C, and the typical junction-to-ambient thermal resistance, when board mounted, is 79˚C/W.

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

Ω resistor.

Note 5: Machine model, 200 pF–240 pF discharged through all pins.

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

Note 7: Limits are guarantees that all parts are tested in production to meet the stated values.

Timing Diagram

DS012677-3

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