LM4934 datasheet(9/39 Pages) NSC

9 / 39 page

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)/ θ JA or the number given in Absolute Maximum Ratings, whichever is lower.

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: Shutdown current is measured in a normal room environment.

Note 10: Internal DAC only with DAC modes 00 and 01.

TABLE 1. Output Noise

Output Noise AV

DD =5Vand AVDD = 3V. All gains set to 0dB. Units in µV. A - weighted

MODE

HP OCL or SE

Lineout

Units

122

µV

222

µV

322

µV

468

µV

538

µV

629

µV

738

µV

TABLE 2. PSRR AV

DD =3V

PSRR AV

DD = 3V. f = 217Hz; Vripple = 200mVp-p; CB = 2.2µF.

MODE

(Typ)

(Limit)

HP OCL or

(Typ)

HP OCL or

(Limit)

Lineout

(Typ)

Units

169

677268

369

463

569

669

769

TABLE 3. PSRR AV

DD =5V

PSRR AV

DD = 5V. All gains set to 0dB. f = 217Hz; Vripple = 200mVp-p; CB = 2.2µF

MODE

(Typ)

HP OCL or SE

(Typ)

Lineout

(Typ)

Units

168

268

368

468

568

669

768

TABLE 4. Dynamic Range and SNR

Dynamic Range and SNR. 3V

≤ AV

≤ 5V. All programmable gain set to 0dB. Units in dB.

DR (Typ)

SNR (Typ)

Units

Lineout

100

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