AD8305 Analog Devices, AD8305 Datasheet - Page 17

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

REV. A
SC-STYLE
PD
INPT
IREF
LK1
VRDZ
VREF
C11
1
2
3
1nF
OPEN
OPEN
OPEN
R9
R17
R18
R5
VSUM
OPEN
R13
C1
1%
OPEN
R7
R1
200k
1k
R20
0
R16
1nF
C8
1k
R19
0
1nF
I
REF
I
PD
Figure 16. Evaluation Board Schematic
1
2
3
4
VRDZ
IREF
INPT
VREF
VSUM
COMM
0.01 F
5
16
0.1 F
VNEG
C3
C6
VNEG
COMM
–17–
6
15
1
AD8305
R15
0
VNEG
COMM
AGND
2
14
7
R12
0
VPOS
COMM
P1
3
8
13
VLOG
VOUT
SCAL
BFIN
0.01 F
0.1 F
VPOS
C4
C5
12
11
10
9
OPEN
R2
0
OPEN
C7
C10
OPEN
R3
R6
0
OPEN
C9
OPEN
VRDZ
AGND
VOUT
VREF
VSUM
VLOG
C2
OPEN
R11
0
AD8305
R8
R4
OPEN
OPEN
R10
R14
0
1
2
3
4
5
6
P2
VLOG
VLOG
VOUT
VOUT