TS616IDW datasheet(25/36 Pages) STMICROELECTRONICS

No. de pieza	TS616IDW

Descripción Electrónicos	Dual wide band operational amplifier with high output current

PDF	36 Pages

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Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

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TS616

Noise measurements

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7.2

Measurement of iNn

To measure the negative input current noise iNn, we set R3=0 and use Equation 5. This time

the gain must be lower in order to decrease the thermal noise contribution:

●

R1=100

Ω, R2=910Ω, R3=0, gain= 10.1

●

Equivalent input noise: 3.40nV/

√Hz

●

Negative input current noise: iNn =21pA/

√Hz

7.3

Measurement of iNp

To extract iNp from Equation 3, a resistance R3 is connected to the non-inverting input. The

value of R3 must be chosen in order to keep its thermal noise contribution as low as

possible against the iNp contribution.

●

R1=100

Ω, R2=910Ω, R3=100Ω, Gain=10.1

●

Equivalent input noise: 3.93nV/

√Hz

●

Positive input current noise: iNp=15pA/

√Hz

●

Conditions: Frequency=100kHz, VCC=±2.5V

●

Instrumentation: HP3585A Spectrum Analyzer (the input noise of the HP3585A is

8nV/

√Hz)

TS616IDW Datasheet(PDF) 25 Page - STMicroelectronics