AD8305 Analog Devices, AD8305 Datasheet - Page 4

• Manufacturer Part Number: AD8305
• Description: 100 Db-range (10nA-1mA) Logarithmic Converter
• Manufacturer: Analog Devices

AD8305–Typical Performance Characteristics
TPC 2. V
TPC 1. V
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
TPC 3. V
(Decade Steps from 10 nA to 1 mA)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
0
1n
1n
1n
T
V
A
N
= –40 C, 0 C, +25 C, +70 C, +85 C
= 0V
10n
10n
10n
LOG
LOG
10nA
LOG
–40 C
100nA
vs. I
vs. I
vs. I
1 A
100n
100n
100n
+25 C
+85 C
–40 C
10 A
100 A
+25 C
+85 C
REF
PD
PD
+70 C
0 C
for Multiple Temperatures
1mA
for Multiple Values of I
for Multiple Temperatures
T
V
1
1
1
A
N
I
I
+70 C
REF
I
0 C
= –40 C, 0 C, +25 C, +70 C, +85 C
PD
= 0V
PD
– A
– A
– A
10
10
10
100
100
100
1m
1m
1m
REF
10m
10m
10m
–4–
TPC 4. Law Conformance Error vs. I
for Multiple Temperatures, Normalized to 25 ∞ C
TPC 5. Law Conformance Error vs. I
for Multiple Temperatures, Normalized to 25 ∞ C
TPC 6. Law Conformance Error vs. I
Values of I
(V
otherwise noted.)
–0.5
–1.0
–1.5
–2.0
–0.1
–0.2
–0.3
–0.4
–0.5
–0.5
–1.0
–1.5
–2.0
2.0
1.5
1.0
0.5
2.0
1.5
1.0
0.5
0.5
0.4
0.3
0.2
0.1
P
0
0
0
1n
1n
1n
= 5 V, V
10 A
10n
10n
10n
REF
1 A
–40 C
N
(Decade Steps from 10 nA to 1 mA)
= 0 V, R
100 A
+85 C
100n
100n
100n
0 C
REF
T
V
1mA
T
V
1
A
N
1
1
A
N
= –40 C, 0 C, +25 C, +70 C, +85 C
= 0V
+25 C
I
= –40 C, 0 C, +25 C, +70 C, +85 C
= 0V
I
I
= 200 k , T
PD
REF
PD
– A
– A
+25 C
– A
10
10
10
+70 C
+70 C
100
PD
REF
100
100
10nA
0 C
A
PD
(at I
(at I
= 25 C, unless
–40 C
for Multiple
100nA
+85 C
REF
1m
1m
1m
PD
= 10 m A)
= 10 m A)
10m
10m
10m
REV. A