AD8304 데이터 시트보기 (PDF) - Analog Devices

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AD8304

160 dB Range (100 pA –10 mA) Logarithmic Converter

Analog Devices 

10

10nA100nA1␮A 10␮A

0

100␮A

1nA

10mA

–10

1mA

–20

–30

–40

–50

–60

–70

100

1k

10k

100k

1M

10M

100M

FREQUENCY – Hz

TPC 7. Small Signal AC Response, IPD to VLOG

(5% Sine Modulation of IPD at Frequency)

AD8304

10

9

8

7

6

5

4

3

2

1

0

1n

10n 100n 1␮

10␮ 100␮ 1m

10m

INPUT CURRENT – A

TPC 10. Total Wideband Noise Voltage at VLOG vs. IPD

100

10kHz

10

100kHz

1

1kHz

0.1

1MHz

100Hz

0.01

1n

10n 100n

1␮

10␮ 100␮ 1m

IPD – ␮A

10m

TPC 8. Spot Noise Spectral Density at VLOG vs. IPD

3

GAIN = 1؋, 2؋, 2.5؋, 5؋

0

AV = 5

–3

AV = 2.5

–6

AV = 2

–9

AV = 1

–12

100

1k

10k

100k

1M

10M

100M

FREQUENCY – Hz

TPC 11. Small Signal Response of Buffer

100

1nA

10

10nA

100nA

1

0.1

1␮A

10␮A

>100␮A

0.01

100

1k

10k

100k

1M

10M

FREQUENCY – Hz

TPC 9. Spot Noise Spectral Density at VLOG vs. Frequency

10

fC = 1kHz

0

–10

–20

–30

–40

–50

–60

–70

10

100

1k

10k

FREQUENCY – Hz

100k

TPC 12. Small Signal Response of Buffer

Operating as Two-Pole Filter

REV. A

–5–

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