MAX4207 Maxim, MAX4207 Datasheet - Page 3

• Manufacturer Part Number: MAX4207
• Description: The MAX4207 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

DC ELECTRICAL CHARACTERISTICS—Dual-Supply Operation (continued)
(V
T
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.
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
Voltage Reference Output
Current
Current Reference Output
Voltage
LOGV2 BUFFER
Input Offset Voltage
Input Bias Current
Output Voltage Range
Output Short-Circuit Current
Slew Rate
Unity-Gain Bandwidth
A
CC
CC
= -40°C to +85°C. Typical values are at T
= +25°C, unless otherwise noted.)
= +5V, V
= +5V, V
PARAMETER
PARAMETER
EE
EE
= -5V, GND = 0, I
= -5V, GND = 0, I
_______________________________________________________________________________________
Precision Transimpedance Logarithmic
REF
REF
SYMBOL
SYMBOL
I
V
REFVOUT
REFISET
I
I
GBW
= 1µA, I
= 1µA, I
OUT+
V
V
OUT-
V
SR
I
OH
OL
IO
B
A
= +25°C, unless otherwise noted.) (Note 1)
LOG
LOG
T
T
T
T
(Note 4)
R
R
Sourcing
Sinking
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
f = 5kHz
I
C
REF
REF
A
A
A
A
L
L
COMP
A
= 10µA, LOGV2 = SCALE, LOGV1 = OSADJ, CMVIN = CMVOUT, R
= 10µA, LOGV2 = SCALE, LOGV1 = OSADJ, CMVIN = CMVOUT, R
= +25°C
= -40°C to +85°C (Note 4)
= +25°C
= -40°C to +85°C (Note 4)
to GND = 2k
to GND = 2k
= +25°C. All temperature limits are guaranteed by design.
= 10nA, I
= 1µA, I
= 32pF
REF
LOG
LOG
= 10nA, I
CONDITIONS
CONDITIONS
= 10µA, R
= 100nA
LOG
COMP
= 100nA
= 300Ω,
V
MIN
490
482
MIN
EE
0.2
+
V
V
TYP
0.01
0.08
TYP
0.67
500
266
0.4
0.2
EE
0.8
3.3
CC
34
58
12
17
23
1
5
1
+
-
V
MAX
MAX
510
518
0.3
CC
2
6
1
-
SET
SET
µV/√Hz
nV/√Hz
nV/√Hz
UNITS
µV
µV
µV
UNITS
> 1MΩ,
> 1MΩ,
MHz
MHz
V/µs
mA
mV
mV
mA
nA
RMS
RMS
RMS
V
3