AD8305 Analog Devices, AD8305 Datasheet - Page 8

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

AD8305
TPC 25. Slope Drift vs. Temperature (3 to Either
Side of Mean of 200 mV/decade)
TPC 26. Intercept Drift vs. Temperature (3 to
Either Side of Mean of 1 nA)
–150
–250
–350
–10
350
250
150
–50
TPC 27. Distribution of Logarithmic Slope
(Nominally 200 mV/decade) Sample >22,000
6000
5000
4000
3000
2000
1000
10
–2
–4
–6
–8
50
–40
8
6
4
2
0
–40
0
190
–30
–30
–20
–20
–10
–10
195
MEAN + 3
MEAN + 3
MEAN – 3
MEAN – 3
0
0
TEMPERATURE – C
TEMPERATURE – C
10
10
SLOPE – mV/dec
20
20
200
30
30
40
40
50
50
60
60
205
70
70
80
80
85
90
90
210
–8–
TPC 28. Distribution of Logarithmic Intercept (Nominally
1 nA when R
TPC 29. Distribution of V
TPC 30. Distribution of Offset Voltage (V
Sample >22,000
7000
6000
5000
4000
3000
2000
1000
6000
5000
4000
3000
2000
1000
4000
3500
3000
2500
2000
1500
1000
500
0
0
0
2.44
–0.015
0.4
REF
–0.010
= 200 k W ± 0.1%) Sample >22,000
2.46
0.6
–0.005
V
2.48
0.8
INPT
REF
INTERCEPT – nA
– V
V
SUM
(R
REF
2.50
1.0
0.0
L
VOLTAGE – V
– V
= 100 k W ) Sample >22,000
0.005
2.52
1.2
0.010
2.54
INPT
1.4
– V
0.015
2.56
REV. A
SUM
1.6
)