Symbol

Parameter

Conditions

LM48820

Units

(Limits)

Typical

(Note 6)

Limit

(Notes 7, 8)

Z

OUT

Output Impedance

SD_LC = SD_RC = GND

–500mV

(Note 10)

8

2

k

Ω (min)

I

L

Input Leakage

±0.1

nA

Note 1: All voltages are measured with respect to the GND 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

that 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.

Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by T

allowable power dissipation is P

for more information

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

Note 7: 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.

Note 9:

θ

Note 10: V

External Components Description

(Figure 1)

Components

Functional Description

1.

C

INR/INL

Input coupling capacitor which blocks the DC voltage at the amplifier's input terminals. Also creates a high-pass

filter with R

of how to determine the value of C

2

C

C

Flying capacitor. Low ESR ceramic capacitor (

3.

C

SS

Output capacitor. Low ESR ceramic capacitor (

4.

C

S1

Tantalum capacitor. 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.

5.

C

S2

Ceramic capacitor. 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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