Datasheet

MAX4206
Precision Transimpedance Logarithmic
Amplifier with Over 5 Decades of Dynamic Range
4 _______________________________________________________________________________________
DC ELECTRICAL CHARACTERISTICS—Dual-Supply Operation (continued)
(V
CC
= +5V, V
EE
= -5V, GND = 0, I
REF
= 1µA, I
LOG
= 10µA, LOGV2 = SCALE, LOGV1 = OSADJ, CMVIN = CMVOUT, R
SET
> 1MΩ,
T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Common-Mode Voltage Input
Range
V
CMVIN
0.5 1.0 V
T
A
= +25°C ±2 ±5
Log Conformity Error V
LC
I
REF
= 10nA,
I
LOG
= 10nA to 1mA,
K = 0.25V/decade
(Note 4)
T
A
= -40°C to +85°C ±10
mV
T
A
= +25°C
237.5 250 262.5
Logarithmic Slope (Scale Factor)
K
T
A
= -40°C to +85°C
231.25 268.75
mV/
decade
Logarithmic Slope (Scale Factor)
Temperature Drift
T
A
= -40°C to +85°C 80
µV/
decade/
°C
Input Offset Voltage V
IO
T
A
= +25°C, |V
CMVIN
- V
REFIIN
|,
|V
CMVIN
- V
LOGIIN
|
15mV
Input Offset Voltage
Temperature Drift
V
IOS
|V
CMVIN
- V
REFIIN
|, |V
CMVIN
- V
LOGIIN
|6
µV/°C
T
A
= +25°C
1.218 1.238 1.258
Voltage Reference Output
V
REFVOUT
T
A
= -40°C to +85°C (Note 4)
1.195 1.275
V
Voltage Reference Output
Current
I
REFVOUT
1mA
T
A
= +25°C
490 500 510
Current Reference Output
Voltage
V
REFISET
T
A
= -40°C to +85°C (Note 4)
482 518
mV
LOGV2 BUFFER
T
A
= +25°C 0.4 2
Input Offset Voltage V
IO
T
A
= -40°C to +85°C (Note 4) 6
mV
Input Bias Current I
B
(Note 4)
0.01
1nA
V
OH
R
L
to GND = 2kΩ
V
CC
-
0.2
V
CC
-
0.3
Output Voltage Range
V
OL
R
L
to GND = 2kΩ
V
EE
+
0.2
V
EE
+
0.08
V
I
OUT+
Sourcing 34
Output Short-Circuit Current
I
OUT-
Sinking 58
mA
Slew Rate SR 12 V/µs
Unity-Gain Bandwidth GBW 5 MHz