ADA4350ARUZ-R7 datasheet(35/38 Pages) AD

35 / 38 page

ADA4350

Data Sheet

Rev. B | Page 34 of 37

RF0

CF0

TIA

100Ω

IPHOTO

CD = 91pF TO 100nF

RF1

CF1

RF2

CF2

RF3

CF3

RF4

CF4

S10

NOTES

1. RFx ARE THE FEEDBACK RESISTORS SPECIFIC TO EACH TRANSIMPEDANCE PATH. CFx ARE THE FEEDBACK

CAPACITORS SPECIFIC TO EACH TRANSIMPEDANCE PATH.

Figure 61. ADA4350 Configured as a Transimpedance Amplifier with Five Different Gains

TRANSIMPEDANCE GAIN AMPLIFIER

PERFORMANCE

Figure 61 shows the ADA4350 configured as a transimpedance

amplifier with five different gains. The photodiode sensor

capacitance, CD, varies from 91 pF to 100 nF to showcase the

transimpedance gain performance at various frequency. Figure 62

to Figure 65 shows the transimpedance vs. frequency at different

CD settings. Note that the compensation capacitors, CF0 to CF4,

correct for the inherent instability of the transimpedance

configuration. Capacitors chosen were such that the trans-

impedance gain response compensates for the maximum

bandwidth and is close to having a 45° phase margin.

0.01k

0.1k

10k

100k

0.1M

10M

100M

FREQUENCY (Hz)

RF0 = 1kΩ

RF1 = 3kΩ

RF2 = 10kΩ

RF3 = 30kΩ

RF4 = 100kΩ

CD = 91pF

RF0 = 1kΩ, CF0 = 15pF

RF1 = 3kΩ, CF1 = 6.8pF

RF2 = 10kΩ, CF2 = 3.3pF

RF3 = 30kΩ, CF3 = 2.2pF

RF4 = 100kΩ, CF4 = 1pF

CD = 91pF

Figure 62. Transimpedance vs. Frequency, CD = 91 pF

FREQUENCY (Hz)

10k

100k

10M

100M

10k

100k

0.1k

0.01k

RF0 = 1kΩ, CF0 = 33pF

RF1 = 3kΩ, CF1 = 15pF

RF2 = 10kΩ, CF2 = 10pF

RF3 = 30kΩ, CF3 = 5.6pF

RF4 = 100kΩ, CF4 = 3.3pF

CD = 1nF

Figure 63. Transimpedance vs. Frequency, CD = 1 nF

ADA4350ARUZ-R7 bảng dữ liệu(PDF) 35 Page - Analog Devices

ADA4350ARUZ-R7 bảng dữ liệu(HTML) 35 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

bảng dữ liệu tải về

Link URL