9.2.3 Application Curves

Photodiode capacitance (pF)

0

2

4

6

8

10

12

14

16

18

20

50

0

100

20

150

40

200

60

250

80

300

100

350

120

400

140

450

160

D609

Figure 9-2. Bandwidth and Noise vs Photodiode Capacitance

Feedback Resistance (k:)

4

6

8

10

12

14

16

18

20

100

20

150

40

200

60

250

80

300

100

350

120

D610

Figure 9-3. Bandwidth and Noise vs Feedback Resistance

10 Power Supply Recommendations

The OPA855-Q1 operates on supplies from 3.3 V to 5.25 V. The OPA855-Q1 operates on single-sided supplies,

split and balanced bipolar supplies, and unbalanced bipolar supplies. Because the OPA855-Q1 does not feature

rail-to-rail inputs or outputs, the input common-mode and output swing ranges are limited at 3.3-V supplies.

±

+

50-Ÿ 6RXUFH

V

I

+

V

S+

0.1 …F

R

T

49.9

R

G

75

R

F

453

6.8 …F

b) Split supply configuration

a) Single supply configuration

±

+

50-Ÿ 6RXUFH

V

I

+

V

S+

0.1 …F

R

T

49.9

R

G

75

R

F

453

6.8 …F

200

+

0.1 …F

6.8 …F

V

S±

200

V

S+

2

V

S+

2

V

S+

2

Figure 10-1. Split and Single Supply Circuit Configuration

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OPA855-Q1

SBOSA57A – FEBRUARY 2021 – REVISED MARCH 2021

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Product Folder Links: OPA855-Q1