LM4901

SNAS139F – DECEMBER 2001 – REVISED DECEMBER 2001

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(1)(2) (continued)

LM4901

Units

Parameter

Test Conditions

(Limits)

Shutdown Voltage Input Low

1.3

V (max)

Output Offset Voltage

7

50

mV (max)

9.7

k

Ω (max)

8.5

7.0

k

Ω (min)

Output Power

(8

Ω)

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

1.07

0.9

W (min)

(4

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

1.6

W

Wake-up time

100

ms (max)

THD+N

Total Harmonic Distortion+Noise

0.2

%

60 (f = 217Hz)

PSRR

Power Supply Rejection Ratio

55

dB (min)

Input terminated with 10

Ω

64 (f = 1kHz)

(6)

two 20k

Ω resistors.

(7)

The Exposed-DAP of the NGZ0010B package should be electrically connected to GND or an electrically isolated copper area. The

LM4901NGZ demo board (views featured in the Application Information section) has the Exposed-DAP connected to GND with a PCB

area of 86.7mils x 585mils (2.02mm x 14.86mm) on the copper top layer and 550mils x 710mils (13.97mm x 18.03mm) on the copper

bottom layer.

(8)

The thermal performance of the WSON package (LM4901NGZ) when used with the exposed-DAP connected to a thermal plane is

sufficient for driving 4

Ω loads. The LM4901NGZ demo board (views featured in the Application Information section) can drive 4Ω loads

at the maximum power dissipation point (1.267W) without thermal shutdown circuitry being activated. The other available packages do

not have the thermal performance necessary for driving 4

Ω loads with a 5V supply and are not recommended for this application.

(1) (2)

LM4901

Units

Parameter

Test Conditions

(Limits)

2

7

mA (max)

Quiescent Power Supply Current

3

9

mA (max)

Shutdown Current

0.1

2.0

µA (max)

Shutdown Voltage Input High

1.1

V (min)

Shutdown Voltage Input Low

0.9

V (max)

Shutdown Voltage Input High

1.3

V (min)

Shutdown Voltage Input Low

1.0

V (max)

Output Offset Voltage

7

50

mV (max)

9.7

k

Ω (max)

8.5

7.0

k

Ω (min)

Output Power

(8

Ω)

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

390

mW

(4

Ω)

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

525

mW

Wake-up time

75

ms (max)

THD+N

Total Harmonic Distortion + Noise

0.1

%

62 (f = 217Hz)

PSRR

Power Supply Rejection Ratio

55

dB (min)

Input terminated with 10

Ω

68 (f = 1kHz)

(1)

All voltages are measured with respect to the ground pin, unless otherwise specified.

(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 ensure specific performance limits. Electrical Characteristics state DC and AC electrical

specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the

Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication

of device performance.

(3)

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

(4)

Limits are ensured to TI's AOQL (Average Outgoing Quality Level).

(5)

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

(6)

two 20k

Ω resistors.

4

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