MAX4008 Maxim, MAX4008 Datasheet

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MAX4008

Manufacturer Part Number
MAX4008
Description
The MAX4007/MAX4008 precision, high-side, high-voltage current monitors are specifically designed for monitoring photodiode current in fiber applications
Manufacturer
Maxim
Datasheet
The MAX4007/MAX4008 precision, high-side, high-volt-
age current monitors are specifically designed for mon-
itoring photodiode current in fiber applications. They
offer a connection point for the reference current and a
monitor output that produces a signal proportional to
the reference current. The monitor output of the
MAX4007 is a current proportional to the reference cur-
rent. The monitor output of the MAX4008 is a voltage
proportional to the reference current. The current moni-
tors have six decades of dynamic range and monitor
reference currents of 250nA to 2.5mA with better than
5% accuracy. The photodiode current can be moni-
tored from 10nA to 10mA with reduced accuracy.
The MAX4007/MAX4008 accept a supply voltage of
+2.7V to +76V, suitable for APD or PIN photodiode appli-
cations. Internal current limiting (20mA, typ) protects the
devices against short circuit to ground. A clamp diode
protects the monitor output from overvoltage. Additionally,
these devices feature thermal shutdown if the die temper-
ature reaches +150°C.
The MAX4007/MAX4008 are available in tiny, space-
saving 6-pin SOT23 packages, and operate over the
extended temperature range of -40°C to +85°C.
19-2743; Rev 3; 4/07
Typical Operating Circuit appears at end of data sheet.
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.
MAX4007EUT-T
MAX4008EUT-T
PART
Photodiode Current-Monitoring Systems
Portable Instrumentation
Medical Instrumentation
Laboratory Instrumentation
Consumer Electronics
Current-to-Voltage Conversion
Level Translation
PIN-
PACKAGE
6 SOT23-6
6 SOT23-6
________________________________________________________________ Maxim Integrated Products
General Description
INTERNAL
RESISTOR
None
10kΩ
Selector Guide
Applications
ACCURACY (%)
High-Accuracy, 76V, High-Side
TYPICAL
5
1
Current Monitors in SOT23
♦ Wide Reference Current Dynamic Range
♦ Current (MAX4007) or Voltage (MAX4008) Monitor
♦ Reference Current-Limit Protection (20mA, typ)
♦ Voltage Clamp Protects Subsequent Output
♦ +2.7V to +76V Wide Voltage Range Operation
♦ 6-Pin SOT23 Packages
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
MAX4007EUT-T
MAX4008EUT-T
Outputs
Circuitry
TOP VIEW
Guaranteed 250nA to 2.5mA with 5% Monitor
Accuracy
Extended 10nA to 10mA with 10% Monitor
Accuracy
PART
CLAMP
GND
OUT
PIN-PACKAGE
6 SOT23-6
6 SOT23-6
1
2
3
Ordering Information
MAX4007
MAX4008
SOT23
Pin Configuration
TOP MARK
6
5
4
ABNM
ABNO
BIAS
N.C.
REF
Features
CODE
U6S-3
U6S-3
PKG
1

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MAX4008 Summary of contents

Page 1

... The monitor output of the MAX4007 is a current proportional to the reference cur- rent. The monitor output of the MAX4008 is a voltage proportional to the reference current. The current moni- tors have six decades of dynamic range and monitor reference currents of 250nA to 2 ...

Page 2

... REF f = 0.1Hz to 10kHz I = 2.5mA REF I = 250nA REF MAX4007 I = 2.5mA REF MAX4008 REF = open V = 2.7V to 76V , MAX4007: ΔI = ±1%, /I OUT OUT V BIAS MAX4008: ΔV = ±1% /I OUT OUT = +25°C, A MIN TYP MAX UNITS 2 200 3 1.1 V 0.8 BIAS - 150 ...

Page 3

... REF I = 2.5mA REF I = 10mA 12V REF BIAS I = 250nA ) MAX4007: REF V = 2.7V to 76V I = 1mA BIAS REF ) MAX4008 1mA REF V = 2.7V to 76V BIAS I settles within OUT I = 250nA REF 0.1 10nF IN between REF and I = 2.5mA REF GND = +25°C). All temperature limits are guaranteed by design. ...

Page 4

High-Accuracy, 76V, High-Side Current Monitors in SOT23 (T = +25°C, unless otherwise noted.) A BIAS CURRENT vs. SUPPLY VOLTAGE 2.5mA REF 1 0 250nA REF 0. SUPPLY VOLTAGE (V) GAIN ...

Page 5

A STARTUP DELAY ( 250nA) BIAS REF MAX4007/8 toc10 CH1 0V V BIAS CH1 BIAS D.U.T. REF OUT R1 CH2 CH2 R REF 13pF R TEST 0V 40ms/div R = ...

Page 6

... DC photodiode current in fiber applications (see Functional Diagram). The MAX4007 output is a current that is exactly one-tenth the refer- ence current. The MAX4008 outputs a voltage that is proportional to the reference current with a transimped- ance gain of 1V/mA achieved by a factory-trimmed, internal 10kΩ resistor. ...

Page 7

... Additional voltage margin can be created if a negative supply is used in place of a ground connection, as long as the overall voltage drop experienced by the MAX4007/MAX4008 is less than or equal to 76V. For this type of application, the MAX4007 is suggested so the output can be referenced to “true” ground and not the negative supply. The MAX4007’ ...

Page 8

High-Accuracy, 76V, High-Side Current Monitors in SOT23 2.2μH +2.7V TO +76V 0.22μF 0.22μF PIN PHOTODIODE 8 _______________________________________________________________________________________ BIAS CURRENT MONITOR 10x 1x CLAMP CURRENT CLAMP REF MAX4007 GND APD TIA HIGH-SPEED DATA PATH TRANSISTOR COUNT: 195 PROCESS: BiCMOS Typical Operating ...

Page 9

... For the latest package outline information www.maxim-ic.com/packages.) _______________________________________________________________________________________ High-Accuracy, 76V, High-Side Current Monitors in SOT23 Package Information PACKAGE OUTLINE, SOT 6L BODY 1 21-0058 ...

Page 10

... Revision History Pages changed at Rev 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. ...

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