ADA4625-1ARDZ-R7 datasheet(30/35 Pages) AD

Il numero della parte	ADA4625-1ARDZ-R7

Spiegazioni elettronici	36V 18MHz Low Noise, Fast Settling Single Supply, RRO, JFET Op Amp

PDF	35 Pages

Scroll/Zoom	100%

Produttore elettronici	AD [Analog Devices]

Homepage	http://www.analog.com

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30 / 35 page

ADA4625-1/ADA4625-2

Data Sheet

Rev. A | Page 30 of 35

Table 8 shows the noise sources and estimated total output noise

for the photodiode amplifier with CF = 2.2 pF and CF =3.9 pF,

respectively.

Use the Analog Devices Analog Photodiode Wizard to design a

transimpedance amplifier circuit to interface with a photodiode.

Table 8. RMS Noise Contributions of the Photodiode Preamplifier

Noise Contributor

Expression

RMS Noise (µV)1

CF = 2.2 pF

CF = 3.9 pF











 π

kTR

where:

k is Boltzmann’s constant (1.38 × 10−23 J/K).

T is the temperature in Kelvin (K).

43.2

32.5

Current Noise, Vni, AMP

0.34

0.25

Voltage Noise, Vnv, AMP

GBP













61.6

47.7

Total Noise

AMP

75.2

57.7

RMS noise with RF = 49.9 kΩ, CIN = CCM + CDM = 19.9 pF, CD = 5 pF, iN = 4.5 fA/√Hz, and eN =3.3 nV/√Hz.

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