Datasheet

MAX4207
Precision Transimpedance Logarithmic
Amplifier with Over 5 Decades of Dynamic Range
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
(All voltages referenced to GND, unless otherwise noted.)
V
CC
...........................................................................-0.3V to +6V
V
EE
............................................................................-6V to +0.3V
Supply Voltage (V
CC
to V
EE
) .............................................. +12V
REFVOUT....................................................(V
EE
- 0.3V) to +3.0V
OSADJ, SCALE, REFISET...........................(V
EE
- 0.3V) to +5.5V
REFIIN, LOGIIN ........................................(V
EE
- 0.3V) to V
CMVIN
LOGV1, LOGV2, CMVOUT,
REFIOUT ......................................(V
EE
- 0.3V) to (V
CC
+ 0.3V)
CMVIN............................................................(V
EE
- 0.3V) to +1V
Continuous Current (REFIIN, LOGIIN) ................................10mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin Thin QFN (derate 16.9mW/°C above +70°C) ...1349mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
DC ELECTRICAL CHARACTERISTICS—Dual-Supply Operation
(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
V
CC
(Note 2) 2.7 5.5
Supply Voltage
V
EE
(Note 2)
-2.7 -5.5
V
T
A
= +25°C 5 6
Supply Current I
CC
T
A
= -40°C to +85°C 7.5
mA
Minimum 10 nA
LOGIIN Current Range
(Notes 3, 4)
I
LOG
Maximum 1 mA
Minimum 10 nA
REFIIN Current Range
(Notes 3, 4)
I
REF
Maximum 1 mA
Common-Mode Voltage
V
CMVOUT
0V
Common-Mode Voltage Input
Range
V
CMVIN
0 0.5 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
|
0.6 5 mV
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