The following specifications apply for V

Symbol

Parameter

Conditions

LM4850

Units

(Limits)

Typical

(Note 6)

Limit

(Note 7)

SE Mode; V

2.0

mA

I

SD

Shutdown Current

SD Mode

30

µA

V

OS

Output Offset Voltage

BTL Mode; A

BTL OUT+ to BTL OUT−

5.0

40

mV

P

O

Output Power

BTL Mode; R

Ω

THD+N = 1%

440

mW

SE Mode; R

Ω

THD+N = 1%

40

mW

V

IH

Shutdown Input Voltage High

2.0

V (min)

V

IL

Shutdown Input Voltage Low

0.8

V (max)

The following specifications apply for V

Symbol

Parameter

Conditions

LM4850

Units

(Limits)

Typical

(Note 6)

Limit

(Note 7)

I

DD

Supply Current

BTL Mode; V

1.8

mA

SE Mode; V

1.8

mA

I

SD

Shutdown Current

SD Mode

25

µA

V

OS

Output Offset Voltage

BTL Mode; A

BTL OUT+ to BTL OUT−

5.0

40

mV

P

O

Output Power

BTL Mode; R

Ω

THD+N = 1%

300

mW

SE Mode; R

Ω

THD+N = 1%

25

mW

V

IH

Shutdown Input Voltage High

2.0

V (min)

V

IL

Shutdown Input Voltage Low

0.8

V (max)

Note 3: Absolute Maximum Rating indicate limits beyond which damage to the device may occur.

Note 4: Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and

test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may

degrade when the device is not operated under the listed test conditions.

Note 5: Human body model, 100pF discharged through a 1.5k

Ω resistor.

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

Note 7: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.

Note 8: Machine Model ESD test is covered by specification EIAJ IC-121-1981. A 200pF cap is charged to the specified voltage, then discharged directly into the

IC with no external series resistor (resistance of discharge path must be under 50

Ω).

Note 9: All voltages are measured with respect to the ground pin, unless otherwise specified.

Note 10: The given

Note 11: When driving 3

Ω or 4Ω loads from a 5V supply, the LM4850 must be mounted to a circuit board.

Note 12: Limits are guaranteed to National’s AOQL ( Average Outgoing Quality Level ).

External Components Description

(Refer to Figure 1.)

Components

Functional Description

1.

R

i

Inverting input resistance which sets the closed-loop gain in conjunction with R

high pass filter with C

πR

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