Datasheet

MAX4206
Precision Transimpedance Logarithmic
Amplifier with Over 5 Decades of Dynamic Range
_______________________________________________________________________________________ 7
I
LOG
PULSE RESPONSE
(I
REF
= 100nA,
V
CC
= 5V, V
EE
= GND)
MAX4206 toc13
V
LOGV1
(V)
20
µ
s/div
0.50V
1.0V
100
µ
A TO 1mA
10
µ
A TO 100
µ
A
1
µ
A TO 10
µ
A
100nA TO 1
µ
A
0.25V
0.75V
0.75V
0.50V
0.25V
0
I
LOG
PULSE RESPONSE
(I
REF
= 100nA,
V
CC
= 5V, V
EE
= -5V)
MAX4206 toc14
V
LOGV1
(V)
20
µ
s/div
0.50V
1.0V
100
µ
A TO 1mA
10
µ
A TO 100
µ
A
1
µ
A TO 10
µ
A
100nA TO 1
µ
A
0.25V
0.75V
0.75V
0.50V
0.25V
0
I
REF
PULSE RESPONSE
(I
LOG
= 1mA)
MAX4206 toc15
V
LOGV1
(V)
20
µ
s/div
0.50V
1.0V
1
µ
A TO 100nA
10
µ
A TO 1
µ
A
100
µ
A TO 10
µ
A
1mA TO 100
µ
A
0.25V
0.75V
0.75V
0.50V
0.25V
0
0
10
5
20
15
25
30
240 250245 255
LOGARITHMIC SLOPE DISTRIBUTION
MAX4206 toc16
SLOPE (mV/DECADE)
COUNT (%)
260
0
5
15
10
20
25
1.232 1.238 1.2401.234 1.236 1.242
V
REFVOUT
DISTRIBUTION
MAX4206 toc17
V
REFVOUT
(V)
COUNT (%)
R
L
= 100k
Ω
1.244
0
6
4
2
12
8
10
14
16
-1.0 0.5 1.0-0.5 0 1.5 2.0 2.5
INPUT OFFSET VOLTAGE DISTRIBUTION
MAX4206 toc18
INPUT OFFSET VOLTAGE (mV)
COUNT (%)
INPUT OFFSET VOLTAGE = V
LOGIIN
- V
CMVIN
3.0
Typical Operating Characteristics (continued)
(V
CC
= +5V, V
EE
= GND = 0V, I
REF
= 1µA, I
LOG
= 10µA, LOGV2 = SCALE, LOGV1 = OSADJ, CMVIN = CMVOUT, R
SET
> 1MΩ,
T
A
= +25°C, unless otherwise noted.)