MAX4206 Maxim, MAX4206 Datasheet - Page 7

• Manufacturer Part Number: MAX4206
• Description: The MAX4206 logarithmic amplifier computes the log ratio of an input current relative to a reference current (externally or internally generated) and provides a corresponding voltage output with a default 0
• Manufacturer: Maxim

(V
T
Amplifier with Over 5 Decades of Dynamic Range
A
CC
= +25°C, unless otherwise noted.)
= +5V, V
0.75V
0.75V
0.50V
0.50V
0.25V
0.25V
0.75V
0.75V
0.50V
0.50V
0.25V
0.25V
1.0V
1.0V
EE
25
20
15
10
0
0
5
0
1.232
= GND = 0V, I
R
L
_______________________________________________________________________________________
= 100kΩ
1.234 1.236
V
I
I
V
REF
REFVOUT
LOG
CC
Precision Transimpedance Logarithmic
(I
PULSE RESPONSE
PULSE RESPONSE
= 5V, V
(I
REF
LOG
V
REFVOUT
20µs/div
20µs/div
1.238
REF
= 100nA,
DISTRIBUTION
= 1mA)
EE
(V)
= 1µA, I
= GND)
1.240
1.242
MAX4206 toc13
MAX4206 toc15
LOG
Typical Operating Characteristics (continued)
1.244
= 10µA, LOGV2 = SCALE, LOGV1 = OSADJ, CMVIN = CMVOUT, R
1µA TO 100nA
10µA TO 1µA
100µA TO 10µA
1mA TO 100µA
100µA TO 1mA
10µA TO 100µA
1µA TO 10µA
100nA TO 1µA
0.75V
0.75V
0.50V
0.50V
0.25V
0.25V
1.0V
30
25
20
15
10
16
14
12
10
5
0
8
6
4
2
0
0
240
-1.0
INPUT OFFSET VOLTAGE DISTRIBUTION
INPUT OFFSET VOLTAGE = V
LOGARITHMIC SLOPE DISTRIBUTION
-0.5
INPUT OFFSET VOLTAGE (mV)
245
I
LOG
V
0
CC
SLOPE (mV/DECADE)
(I
PULSE RESPONSE
0.5
REF
= 5V, V
20µs/div
= 100nA,
250
1.0
EE
1.5
LOGIIN
= -5V)
255
2.0
- V
CMVIN
MAX4206 toc14
2.5
260
3.0
100µA TO 1mA
10µA TO 100µA
1µA TO 10µA
100nA TO 1µA
SET
> 1MΩ,
7