AD8305ACP(2003) データシートの表示（PDF） - Analog Devices

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AD8305ACP
(Rev.:2003)

100 dB Range (10 nA to 1 mA) Logarithmic Converter

Analog Devices 

AD8305–Typical Performance Characteristics

(VP = 5 V, VN = 0 V, RREF = 200 k⍀, TA = 25؇C, unless

otherwise noted.)

1.6

TA = –40؇C, 0؇C, +25؇C, +70؇C, +85؇C

1.4 VN = 0V

1.2

1.0

–40؇C

+25؇C

+85؇C

0.8

0.6

0؇C

0.4

+70؇C

0.2

0

1n

10n 100n

1␮

10␮ 100␮

1m

10m

IPD – A

TPC 1. VLOG vs. IPD for Multiple Temperatures

2.0

TA = –40؇C, 0؇C, +25؇C, +70؇C, +85؇C

1.5

VN = 0V

1.0

+85؇C

+70؇C

0.5

0

–0.5

0؇C +25؇C

–40؇C

–1.0

–1.5

–2.0

1n

10n 100n

1␮

10␮ 100␮ 1m

10m

IPD – A

TPC 4. Law Conformance Error vs. IPD (at IREF = 10 mA)

for Multiple Temperatures, Normalized to 25∞C

1.8

–40؇C

TA = –40؇C, 0؇C, +25؇C, +70؇C, +85؇C

1.6

VN = 0V

1.4

0؇C

1.2

+70؇C

1.0

+25؇C

+85؇C

0.8

0.6

0.4

0.2

0

1n

10n 100n

1␮

10␮ 100␮ 1m

10m

IREF – A

TPC 2. VLOG vs. IREF for Multiple Temperatures

1.8

1.6

1.4

1.2

1.0

10nA

0.8

100nA

1␮A

0.6

10␮A

0.4

100␮A

1mA

0.2

0

1n

10n 100n

1␮

10␮ 100␮

1m

10m

IPD – A

TPC 3. VLOG vs. IPD for Multiple Values of IREF

(Decade Steps from 10 nA to 1 mA)

2.0

TA = –40؇C, 0؇C, +25؇C, +70؇C, +85؇C

1.5

VN = 0V

1.0

+70؇C

+85؇C

0.5

0

–0.5

+25؇C

–1.0

0؇C

–1.5

–40؇C

–2.0

1n

10n 100n 1␮

10␮ 100␮ 1m

10m

IREF – A

TPC 5. Law Conformance Error vs. IREF (at IPD = 10 mA)

for Multiple Temperatures, Normalized to 25∞C

0.5

0.4

0.3

10␮A 100␮A 1mA

0.2

0.1

0

–0.1

1␮A

–0.2

10nA 100nA

–0.3

–0.4

–0.5

1n

10n 100n

1␮

10␮ 100␮ 1m

10m

IPD – A

TPC 6. Law Conformance Error vs. IPD for Multiple

Values of IREF (Decade Steps from 10 nA to 1 mA)

–4–

REV. A

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