MAX4206 Maxim, MAX4206 Datasheet - Page 6

• 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

Precision Transimpedance Logarithmic
Amplifier with Over 5 Decades of Dynamic Range
6
(V
T
A
-0.25
-0.50
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
CC
-10
-15
-20
= +25°C, unless otherwise noted.)
20
15
10
-5
_______________________________________________________________________________________
0
-1
-2
-3
-4
-5
5
0
5
4
3
2
1
0
10n
= +5V, V
1n
1n
10nA
I
I
T
V
V
REF
REF
A
NORMALIZED LOG CONFORMANCE
CC
EE
100nA
= -40 ° C TO +85 ° C
10n
100n
10n 100n
= -5V
= 10nA
= 10nA
= +5V
V
(I
1µA
LOGIIN
100n
EE
REF
V
1µ
10µA
ERROR vs. I
LOGV1
= GND = 0V, I
= 10nA TO 1mA)
100µA
- V
1µ
1µ
I
I
LOG
I
LOG
LOG
10µ
CMVIN
vs. I
1mA
(A)
(A)
(A)
10µ
10µ
LOG
100µ
LOG
vs. I
T
A
100µ
100µ
= -40 ° C
LOG
1m
REF
1m
1m
= 1µA, I
10m
10m
10m
LOG
-0.25
-0.50
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0.01
-10
-15
-20
0.1
20
15
10
-5
10
Typical Operating Characteristics (continued)
5
0
0
1
10n
= 10µA, LOGV2 = SCALE, LOGV1 = OSADJ, CMVIN = CMVOUT, R
1n
1
10nA
I
T
V
V
REF
A
CC
EE
I
NORMALIZED LOG CONFORMANCE
REF
V
= -40 ° C TO +85 ° C
= GND
100n
LOGV2
= 10nA
= +2.7V
10
10n
= I
100nA
LOG
(I
100
LOG
VOLTAGE-NOISE DENSITY
100n
vs. FREQUENCY
ERROR vs. I
1µ
V
1µA
FREQUENCY (Hz)
LOGV1
= 10nA TO 1mA)
100nA
1k
I
I
LOG
REF
10nA
10µ
1µ
10µA 100µA
vs. I
(A)
(A)
10µA
10k
1µA
LOG
100µ
REF
T
10µ
A
100k
= -40 ° C
100µ
1m
1M
1mA
10m
10M
1m
-10
-15
-20
-10
-15
-20
20
15
10
20
15
10
-5
-5
5
0
5
0
5
4
3
2
1
0
10n
10n
10n
I
T
V
V
REF
I
SINGLE SUPPLY: V
V
DUAL SUPPLY: V
V
A
CC
EE
NORMALIZED LOG CONFORMANCE
REF
TOTAL WIDEBAND VOLTAGE NOISE
NORMALIZED LOG CONFORMANCE
EE
EE
= -40 ° C TO +85 ° C
= GND
= 10nA
100n
= +5V
= GND
= -5V
100n
= 10nA
100n
AT V
ERROR vs. I
1µ
ERROR vs. I
1µ
1µ
LOGV2
CC
I
CC
I
I
LOG
LOG
LOG
10µ
= +5V
10µ
= +2.7V, +5V, 11V,
(A)
(A)
(A)
vs. I
10µ
LOG
I
f = 1Hz TO 1MHz
100µ
LOG
REF
100µ
T
LOG
A
= I
= -40°C
SET
LOG
100µ
1m
1m
> 1MΩ,
10m
10m
1m