Electrical Characteristics V

(Notes 1, 2)

The following specifications apply for V

Ω + 15µH unless otherwise specified. Limits apply for T

25˚C.

Symbol

Parameter

Conditions

LM4664

Units

(Limits)

Typical

Limit

(Note 6)

(Notes 7, 8)

I

DD

Quiescent Power Supply Current

V

V

Ω + 15µH

8

9

mA

mA

I

SD

Shutdown Current

V

0.4

µA

V

SDIH

Shutdown Voltage Input High

1.2

V

V

SDIL

Shutdown Voltage Input Low

1.1

V

V

GSIH

Gain Select Input High

1.2

V

V

GSIL

Gain Select Input Low

1.1

V

A

V

Closed Loop Gain

V

6dB

A

V

Closed Loop Gain

V

12

dB

V

OS

Output Offset Voltage

10

mV

T

WU

Wake-up Time

7

ms

P

o

Output Power

THD = 2% (max); f = 1kHz

1.1

W

THD+N

Total Harmonic Distortion+Noise

P

0.8

%

R

IN

Differential Input Resistance

V

90

k

Ω

V

60

k

Ω

PSRR

Power Supply Rejection Ratio

V

Inputs terminated to GND

55

(f = 217Hz)

dB

V

P

65

(f = 217Hz)

dB

CMRR

Common Mode Rejection Ratio

V

f

41

dB

SNR

Signal to Noise Ratio

P

83

dB

e

OUT

Output Noise

A-Weighted filter, V

200

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.

The typical

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: 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.

section under SHUTDOWN FUNCTION 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.

2.

C

I

Input AC coupling capacitor which blocks the DC voltage at the amplifier’s input terminals.

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