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MAX4206ETE+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
General 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 cor-
responding voltage output with a default 0.25V/decade
scale factor. The device operates from a single +2.7V
to +11V supply or from dual ±2.7V to ±5.5V supplies
and is capable of measuring five decades of input cur-
rent across a 10nA to 1mA range.
The MAX4206’s uncommitted op amp can be used for
a variety of functions, including filtering noise, adding
offset, and adding additional gain. A 0.5V reference is
also included to generate an optional precision current
reference using an external resistor, which adjusts the
log intercept of the MAX4206. The output-offset voltage
and the adjustable scale factor are also set using exter-
nal resistors.
The MAX4206 is available in a space-saving 16-pin thin
QFN package (4mm x 4mm x 0.8mm), and is specified
for operation over the -40°C to +85°C extended temper-
ature range.
Applications
Photodiode Current Monitoring
Portable Instrumentation
Medical Instrumentation
Analog Signal Processing
Features
♦ +2.7V to +11V Single-Supply Operation
♦ ±2.7V to ±5.5V Dual-Supply Operation
♦ 5 Decades of Dynamic Range (10nA to 1mA)
♦ Monotonic Over a 1nA to 1mA Range
♦ 0.25V/Decade Internally Trimmed Output Scale
Factor
♦ Adjustable Output Scale Factor
♦ Adjustable Output Offset Voltage
♦ Internal 10nA to 10µA Reference Current Source
♦ 0.5V Input Common-Mode Voltage
♦ Small 16-Pin Thin QFN Package (4mm x 4mm x
0.8mm)
♦ -40°C to +85°C Operating Temperature Range
♦ Evaluation Kit Available
MAX4206
Precision Transimpedance Logarithmic
Amplifier with Over 5 Decades of Dynamic Range
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
MAX4206
V
EE
GND
REFIIN
CMVIN
REFIOUT
LOGIIN
I
IN
CMVOUT
REFISET
SCALE
LOGV2
OSADJ
LOGV1
REFVOUT
V
CC
V
CC
R
COMP
C
COMP
R
SET
R
OS
R1
R2
0.1µF
0.1µF
V
OUT
0.1µF
R
COMP
C
COMP
Typical Operating Circuit
19-3071; Rev 1; 6/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX4206ETE -40°C to +85°C 16 Thin QFN-EP*
*EP = Exposed paddle.
16 15 14 13
CMVIN
LOGIIN
REFIIN
REFIOUT
9
10
11
12
N.C.
V
CC
REFISET
CMVOUT
4
3
2
1
V
EE
GND
REFVOUT
N.C.
5678
LOGV1
OSADJ
SCALE
LOGV2
MAX4206
TOP VIEW
(LEADS ON BOTTOM)
THIN QFN
Pin Configuration
MAX4206
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 +12V
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—Single-Supply Operation
(V
CC
= +5V, V
EE
= GND = 0V, 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
Supply Voltage V
CC
(Note 2) 2.7
11.0
V
T
A
= +25°C 3.9 5
Supply Current I
CC
T
A
= -40°C to +85°C 7
mA
Minimum 10 nA
LO GIIN C ur r ent Rang e ( N otes 3, 4)
I
LOG
Maximum 1 mA
Minimum 10 nA
RE FIIN C ur r ent Rang e ( N otes 3, 4)
I
REF
Maximum 1 mA
Common-Mode Voltage
V
CMVOUT
480 500 520
mV
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 (Note 4)
231.25 268.75
mV/
Logarithmic Slope (Scale Factor)
Temperature Drift
T
A
= -40°C to +85°C 80
µV/
°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
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
V ol tag e Refer ence O utp ut C ur r ent I
REFVOUT
1mA
T
A
= +25°C
490 500 510
C ur r ent Refer ence O utp ut V ol tag eV
REFISET
T
A
= -40°C to +85°C (Note 4)
482 518
mV
MAX4206
Precision Transimpedance Logarithmic
Amplifier with Over 5 Decades of Dynamic Range
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS—Single-Supply Operation
(V
CC
= +5V, V
EE
= GND = 0, I
REF
= 1µA, I
LOG
= 10µA, LOGV2 = SCALE, LOGV1 = OSADJ, CMVIN = CMVOUT, R
SET
> 1MΩ,
T
A
= +25°C, unless otherwise noted.)
DC ELECTRICAL CHARACTERISTICS—Single-Supply Operation (continued)
(V
CC
= +5V, V
EE
= GND = 0V, 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
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 0.2
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
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
LOGV2 Total Noise
0.1Hz to 10Hz, total output-referred noise,
I
REF
= 10nA, I
LOG
= 100nA
17 µV
RMS
LOGV2 Spot Noise Density f = 5kHz, I
REF
= 10nA, I
LOG
= 100nA 0.8 µV/√Hz
REFVOUT Total Noise 1Hz to 10Hz, total output-referred noise 3.3 µV
RMS
REFVOUT Spot Noise Density f = 5kHz 266 nV/√Hz
REFISET Total Noise 1Hz to 10Hz, total output-referred noise 0.67 µV
RMS
REFISET Spot Noise Density f = 5kHz 23 nV/√Hz
Small-Signal Unity-Gain
Bandwidth
I
REF
= 1µA, I
LOG
= 10µA, R
COMP
= 300Ω,
C
COMP
= 32pF
1MHz
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
2.7 5.5
Supply Voltage (Note 2)
V
EE
-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
LO GIIN C ur r ent Rang e ( N otes 3, 4)
I
LOG
Maximum 1 mA
Minimum 10 nA
RE FIIN C ur r ent Rang e ( N otes 3, 4)
I
REF
Maximum 1 mA
Common-Mode Voltage
V
CMVOUT
480 500 520
mV
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

MAX4206ETE+T

Mfr. #:
Buy MAX4206ETE+T
Manufacturer:
Maxim Integrated
Description:
Logarithmic Amplifiers Transimpedance w/ 100Db Dynamic Range
Lifecycle:
New from this manufacturer.
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