ADA4625-1ARDZ-R7 datasheet(27/30 Pages) AD

Teilenummer	ADA4625-1ARDZ-R7

Bauteilbeschribung	Low Noise, Fast Settling Single Supply, RRO, JFET Op Amp

PDF	30 Pages

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Hersteller	AD [Analog Devices]

Direct Link	http://www.analog.com

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27 / 30 page

Data Sheet

ADA4625-1

Rev. 0 | Page 27 of 30

Table 7 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 7. RMS Noise Contributions of the Photodiode Preamplifier

Noise Contributor

Expression

RMS Noise (μV)1

CF = 2.2 pF

CF = 3.9 pF











 

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

1 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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