Electrical Characteristics V

(Notes 1, 2)

The following specifications apply for V

erwise specified. Limits apply for T

Symbol

Parameter

Conditions

LM4665

Units

(Limits)

Typical

Limit

(Note 6)

(Notes 7, 8)

I

DD

Quiescent Power Supply Current

V

V

Ω + 22µH Load

3.0

3.5

7.0

mA (max)

mA

I

SD

Shutdown Current

V

0.01

5.0

µA (max)

V

SDIH

Shutdown Voltage Input High

V

1.0

1.4

V (min)

V

SDIL

Shutdown Voltage Input Low

V

0.8

0.4

V (max)

V

SDIH

Shutdown Voltage Input High

V

1.0

1.4

V (min)

V

SDIL

Shutdown Voltage Input Low

V

0.8

0.4

V (max)

V

GSIH

Gain Select Input High

1.0

1.4

V (min)

V

GSIL

Gain Select Input Low

0.8

0.4

V (max)

A

V

Closed Loop Gain

V

6

5.5

6.5

dB (min)

dB (max)

A

V

Closed Loop Gain

V

12

11.5

12.5

dB (min)

dB (max)

V

OS

Output Offset Voltage

10

mV

T

WU

Wake-up Time

5

ms

P

o

Output Power

THD+N = 2% (max), f

400

350

mW (min)

THD+N

Total Harmonic Distortion+Noise

P

0.4

% (max)

R

IN

Differential Input Resistance

V

100

k

Ω

V

65

k

Ω

PSRR

Power Supply Rejection Ratio

V

f

Inputs Terminated

52

dB

CMRR

Common Mode Rejection Ratio

V

f

39

dB

e

N

Output Noise Voltage

A-Weighted filter, V

350

µV

Note 1: All voltages are measured with respect to the ground 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 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.

See the Efficiency and Power Dissipation versus Output Power curves for more information.

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

Ω resistor.

Note 5: Machine Model, 220 pF–240 pF discharged through all pins.

Note 6: Typical specifications are specified at 25˚C and represent the parametric norm.

Note 7: Tested 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.

performance in PLAY mode. See the Application Information section under SHUTDOWN FUNCTION for more information.

Note 10: The exposed-DAP of the LDA10B package should be electrically connected to GND.

Note 11: The LM4665 in the micro SMD package (ITL) has an operating range of 2.7V - 3.8V for 8

Ω speaker loads. The supply range may be increased as speaker

impedance is increased. It is not recommended that 4

Ω loads be used with the micro SMD package. To increase the supply voltage operating range, see Figure 2

and INCREASING SUPPLY VOLTAGE RANGE in the Application Information section for more information.

External Components Description

(Figure 1)

Components

Functional Description

1.

C

S

Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing

section for information concerning proper placement and selection of the supply bypass capacitor.

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