MAX4206 Maxim, MAX4206 Datasheet - Page 5

• 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

AC ELECTRICAL CHARACTERISTICS—Dual-Supply Operation
(V
T
Note 1: All devices are 100% production tested at T
Note 2: Guaranteed and functionally verified.
Note 3: Log conformity error less than ±5mV with scale factor = 0.25V/decade.
Note 4: Guaranteed by design.
(V
T
LOGV2 Total Noise
LOGV2 Spot Noise Density
REFVOUT Total Noise
REFVOUT Spot Noise Density
REFISET Total Noise
REFISET Spot Noise Density
Small-Signal Unity-Gain
Bandwidth
Amplifier with Over 5 Decades of Dynamic Range
A
A
CC
CC
-0.25
1.75
1.50
1.25
1.00
0.75
0.50
0.25
= +25°C, unless otherwise noted.)
= +25°C, unless otherwise noted.)
0
= +5V, V
= +5V, V
10n
I
T
V
V
REF
A
CC
EE
= -40 ° C TO +85 ° C
PARAMETER
= GND
100n
= 10nA
= +5V
EE
EE
V
= -5V, GND = 0, I
1µ
= GND = 0V, I
LOGV1
_______________________________________________________________________________________
I
LOG
10µ
vs. I
(A)
LOG
100µ
Precision Transimpedance Logarithmic
REF
1m
REF
SYMBOL
= 1µA, I
10m
= 1µA, I
LOG
-0.25
1.75
1.50
1.25
1.00
0.75
0.50
0.25
LOG
f = 5kHz
0.1Hz to 10Hz, total output-referred noise,
I
f = 5kHz, I
1Hz to 10Hz, total output-referred noise
f = 5kHz
1Hz to 10Hz, total output-referred noise
I
C
0
REF
REF
= 10µA, LOGV2 = SCALE, LOGV1 = OSADJ, CMVIN = CMVOUT, R
COMP
1n
A
= 10µA, LOGV2 = SCALE, LOGV1 = OSADJ, CMVIN = CMVOUT, R
I
T
V
V
REF
= +25°C. All temperature limits are guaranteed by design.
A
CC
EE
= 10nA, I
= 1µA, I
= -40 ° C TO +85 ° C
10n 100n
= -5V
= 10nA
= +5V
= 32pF
REF
V
LOG
(I
LOGV1
LOG
= 10nA, I
REF
CONDITIONS
1µ
I
LOG
= 10µA, R
= 10nA)
= 100nA
vs. I
(A)
10µ
Typical Operating Characteristics
LOG
LOG
100µ
COMP
= 100nA
1m
= 300 ,
10m
-0.25
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
10n
MIN
I
T
V
V
REF
A
CC
EE
= -40 ° C TO +85 ° C
= GND
= 10nA
= +2.7V
100n
TYP
0.67
V
266
1µ
0.8
3.3
17
23
LOGV1
1
I
LOG
10µ
vs. I
(A)
MAX
100µ
LOG
SET
SET
1m
µV/√Hz
nV/√Hz
nV/√Hz
UNITS
µV
µV
µV
> 1MΩ,
> 1MΩ,
MHz
RMS
RMS
RMS
10m
5