LM4930_14 datasheet(11/41 Pages) TI1

部品番号	LM4930

部品情報	Audio Power Amplifier Series Audio Subsystem with Stereo Headphone & Mono Speaker Amplifiers

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LM4930

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SNAS212B – MAY 2004 – REVISED SEPTEMBER 2004

Electrical Characteristics DVDD = 3.3V, AVDD = 5V, RLHP = 32Ω, RLHF = 8Ω

(1) (2) (3)

The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for TA= 25°C.

Symbol

Parameter

Conditions

LM4930

Units

(Limits)

Typical (4)

Limits (5)

(6)

fMCLK = 12.288MHz

Output Mode = "0010"

Output Mode = "0011"

2

Output Mode = "0100"

Output Mode = "0101"

DIDD

Digital Power Supply Current

Output Mode = "0110"

4.4

Output Mode = "0111"

Output Mode = "1000"

Output Mode = "1001"

4.9

8

mA (max)

Output Mode = "1010"

fMCLK = 12.288MHz; No Load

Output Mode = "0010"

7.0

Output Mode = "0011"

6.3

Output Mode = "0100"

8.0

Analog Power Supply Quiescent

Output Mode = "0101"

8.2

AIDD

Current

Output Mode = "0110"

7.4

Output Mode = "0111"

8.7

Output Mode = "1000"

Output Mode = "1001"

9.5

14

mA (max)

Output Mode = "1010"

DISD

Digital Powerdown Current

fMCLK = 12.288MHz

1

7

µA (max)

Output Mode = "0000" Powerdown Mode

AISD

Analog Powerdown Current

fMCLK = 12.288MHz

1

2

µA (max)

Output Mode = "0000" Powerdown Mode

DIST

Digital Standby Current

fMCLK = 12.288MHz

1.4

2

mA (max)

Output Mode = "0001" Standby Mode

AIST

Analog Standby Current

fMCLK = 12.288MHz

230

1000

µA (max)

Output Mode = "0001" Standby Mode

VFS_LS

Full-Scale Output Voltage

CLASS = 0; 0dB gain setting; 8

Ω BTL load(7)

2.5

VP-P

(Mono speaker amplifier)

VFS_HP

Full-Scale Output Voltage

0dB gain setting; 32

Ω Stereo Load(7)

2.5

VP-P

(Headphone amplifier)

VMIC_BIAS Mic Bias Voltage

2.0

V

THD+N

Headphone Amplifier Total

fIN = 1 kHz, POUT = 7.5mW; 32Ω Stereo Load

0.07

%

Harmonic Motion Distortion + Noise

POHP

Headphone Amplifier Output Power

THD+N = 0.5%, fOUT = 1kHz

27

20

mW (min)

POLS

Mono Speaker Amplifier Output

THD+N = 1%, fOUT = 1kHz

1

W

Power

(1)

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.

(2)

All voltages are measured with respect to the relevant GND pin unless otherwise specified.

(3)

Best operation is achieved by maintaining 3.0V

≤ AVDD ≤ 5.0 and 3.0V ≤ DVDD ≤ 3.6V. AVDD must be equal to or greater than DVDD. for

proper operation.

(4)

Typicals are measured at 25°C and represent the parametric norm.

(5)

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

(6)

Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.

(7)

This value represents the 0dB output level of the given amplifier for the given analog supply voltage. Gain values given in the

GAINCONFIG register are relative to these full-scale values for each output amplifier.

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