MAX4206ETE+T Maxim Integrated Products, MAX4206ETE+T Datasheet

IC AMP TRANS LOG 16-TQFN

MAX4206ETE+T

Manufacturer Part Number
MAX4206ETE+T
Description
IC AMP TRANS LOG 16-TQFN
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX4206ETET.pdf (17 pages)

Specifications of MAX4206ETE+T

Amplifier Type
Logarithmic
Number Of Circuits
1
Slew Rate
12 V/µs
Gain Bandwidth Product
5MHz
Voltage - Input Offset
1000µV
Current - Supply
5mA
Current - Output / Channel
58mA
Voltage - Supply, Single/dual (±)
2.7 V ~ 11 V, ±2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-TQFN Exposed Pad
Number Of Channels
1
Input Offset Voltage
5 mV
Operating Supply Voltage
3 V, 5 V, 9 V
Supply Current
5 mA
Operating Temperature Range
+ 85 C
Mounting Style
SMD/SMT
Power Dissipation
1349 mW
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Output Type
-
-3db Bandwidth
-
Current - Input Bias
-
Lead Free Status / Rohs Status
 Details
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.
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.
Amplifier with Over 5 Decades of Dynamic Range
TOP VIEW
(LEADS ON BOTTOM)
Photodiode Current Monitoring
Portable Instrumentation
Medical Instrumentation
Analog Signal Processing
REFVOUT
GND
N.C.
V
EE
1
2
3
4
________________________________________________________________ Maxim Integrated Products
16
5
General Description
THIN QFN
MAX4206
Precision Transimpedance Logarithmic
15
6
Pin Configuration
14
7
13
8
Applications
12
11
10
9
CMVOUT
REFISET
V
N.C.
CC
*EP = Exposed paddle.
MAX4206ETE
+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
I
IN
PART
R
C
COMP
COMP
0.1µF
C
R
COMP
0.1µF
COMP
R
SET
Typical Operating Circuit
-40°C to +85°C
TEMP RANGE
LOGIIN
REFIOUT
REFIIN
REFVOUT
REFISET
Ordering Information
GND
MAX4206
V
V
CC
CC
V
EE
CMVOUT
LOGV2
CMVIN
LOGV1
OSADJ
SCALE
16 Thin QFN-EP*
PIN-PACKAGE
Features
V
OUT
R
R1
R2
OS
0.1µF
1

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MAX4206ETE+T Summary of contents

Page 1

... THIN QFN ________________________________________________________________ Maxim Integrated Products 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. +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 ...

Page 2

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) V .........................................................................-0.3V to +12V CC V ............................................................................-6V to +0.3V EE Supply Voltage ( .............................................. +12V ...

Page 3

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range DC ELECTRICAL CHARACTERISTICS—Single-Supply Operation (continued +5V GND = 0V 1µ REF T = -40°C to +85°C. Typical values are at ...

Page 4

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range DC ELECTRICAL CHARACTERISTICS—Dual-Supply Operation (continued +5V -5V, GND = 1µ REF T = -40°C to +85°C. Typical values are ...

Page 5

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range AC ELECTRICAL CHARACTERISTICS—Dual-Supply Operation (V = +5V -5V, GND = REF T = +25°C, unless otherwise noted.) A PARAMETER SYMBOL LOGV2 Total Noise ...

Page 6

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range (V = +5V GND = 0V 1µ REF T = +25°C, unless otherwise noted vs. I LOGV1 LOG (I = ...

Page 7

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range (V = +5V GND = 0V 1µ REF T = +25°C, unless otherwise noted PULSE RESPONSE LOG (I = 100nA, ...

Page 8

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range (V = +5V GND = 0V 1µ REF T = +25°C, unless otherwise noted.) A OUTPUT OFFSET VOLTAGE vs. TEMPERATURE 10 I ...

Page 9

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range (V = +5V GND = 0V 1µ REF T = +25°C, unless otherwise noted.) A SMALL-SIGNAL AC RESPONSE LOG ...

Page 10

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range V CC LOGIIN CMVIN REFIIN V EE GND Figure 1. Functional Diagram Detailed Description Figure 2 shows a simplified model of a logarithmic amplifier. Two ...

Page 11

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range LOG LOGIIN CMVIN REF REFIIN V EE Figure 2. Simplified Model of a Logarithmic Amplifier where scale factor (V/decade) ...

Page 12

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range I and I are currents in the order of 20pA, sig- BIAS1 BIAS2 nificantly smaller than I and I LOG REF be eliminated:    I LOG V ...

Page 13

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range Frequency Response and Noise Considerations The MAX4206 bandwidth is proportional to the magni- tude of the I and I currents, whereas the noise is REF LOG inversely proportional to ...

Page 14

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range 0.1µ LOGIIN C COMP 100pF REFIOUT R COMP REFIIN 100Ω C COMP 100pF MAX4206 R COMP 100Ω CMVOUT REFVOUT 0.1µF REFISET GND V ...

Page 15

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range Photodiode Current Monitoring Figure 8 shows the MAX4206 in a single-supply, optical- power measurement circuit, common in fiberoptic applications. The MAX4007 current monitor converts the sensed APD current to ...

Page 16

Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range 2.2µH +2.7V TO +76V PHOTODIODE BIAS 2.2µF 0.22µF I APD REF FIBER CABLE APD HIGH-SPEED DATA PATH Figure 8. Logarithmic Current-Sensing Amplifier with Sourcing Input 16 ______________________________________________________________________________________ V CC ...

Page 17

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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