ADA4355ABCZ datasheet(15/45 Pages) AD

15 / 45 page

Data Sheet

ADA4355

Rev. A | Page 15 of 45

TYPICAL PERFORMANCE CHARACTERISTICS

TA = 25°C, VCC = 3.3 V, no averaging, and LDO enabled (see the power scheme shown in Figure 3), unless otherwise noted.

FREQUENCY (Hz)

0.1

100k

10M

100M

10k

0.01

0.001

0.0001

0.00001

NO AVERAGES

16k AVERAGES

65k AVERAGES

Figure 13. Noise Spectral Density, TZ = 2 kΩ, LPF = 100 MHz

FREQUENCY (Hz)

100k

10M

100M

10k

0.01

0.1

SOURCE CAPACITANCE = 0.5pF

SOURCE CAPACITANCE = 2pF

SOURCE CAPACITANCE = 5pF

SOURCE CAPACITANCE = 10pF

Figure 14. Noise Spectral Density for Various Source Capacitances, TZ = 2 kΩ,

LPF = 100 MHz

FREQUENCY (Hz)

100k

10M

100M

10k

0.001

0.0001

0.00001

–40°C

+25°C

+85°C

Figure 15. Noise Spectral Density for Various Temperatures, TZ = 2 kΩ,

LPF = 100 MHz

NOISE BANDWIDTH (Hz)

100k

10M

100M

10k

1000

100

0.1

0.01

0.001

NO AVERAGES

16k AVERAGES

65k AVERAGES

Figure 16. RMS Noise and Optical Time Domain Reflectometry (OTDR)

Dynamic Range vs. Noise Bandwidth, TZ = 2 kΩ, LPF = 100 MHz

NOISE BANDWIDTH (Hz)

100k

10M

100M

10k

0.01

0.1

SOURCE CAPACITANCE = 0.5pF

SOURCE CAPACITANCE = 2pF

SOURCE CAPACITANCE = 5pF

SOURCE CAPACITANCE = 10pF

Figure 17. RMS Noise and OTDR Dynamic Range vs. Noise Bandwidth for

Various Source Capacitances, TZ = 2 kΩ, LPF = 100 MHz

NOISE BANDWIDTH (Hz)

100k

10M

100M

10k

0.001

0.01

0.1

–40°C

+25°C

+85°C

Figure 18. RMS Noise and OTDR Dynamic Range vs. Noise Bandwidth for

Various Temperatures, TZ = 2 kΩ, LPF = 100 MHz

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