Electrical Characteristics V

The following specifications apply for V

Ω, and C

25˚C. Pin 3 connected to GND.

Symbol

Parameter

Conditions

LM4929

Units

(Limits)

Typ

(Note 6)

Limit

(Note 7)

V

NO

Output Noise Voltage

BW = 20 Hz to 20kHz, A-weighted

10

µV

PSRR

Power Supply Rejection Ratio

V

65

dB

T

WU

Wake Up Time from Shutdown

OCL

0.5

s

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 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.

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

power derating currents 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: 10

Ω Terminated input.

Note 10: Pin 3 (NC) should be connected to GND for proper part operation.

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

2.

C

I

Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a

high-pass filter with R

πR

an explanation of how to determine the value of C

3.

R

f

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

4.

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.

5.

C

B

Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of Proper

Components, for information concerning proper placement and selection of C

B

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