Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - current control/management Current monitoring SOT 23 6

General Description

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.

Applications

Photodiode Current-Monitoring Systems

Portable Instrumentation

Medical Instrumentation

Laboratory Instrumentation

Consumer Electronics

Current-to-Voltage Conversion

Level Translation

Features

♦ Wide Reference Current Dynamic Range

Guaranteed 250nA to 2.5mA with 5% Monitor

Accuracy

Extended 10nA to 10mA with 10% Monitor

Accuracy

♦ Current (MAX4007) or Voltage (MAX4008) Monitor

Outputs

♦ Reference Current-Limit Protection (20mA, typ)

♦ Voltage Clamp Protects Subsequent Output

Circuitry

♦ +2.7V to +76V Wide Voltage Range Operation

♦ 6-Pin SOT23 Packages

MAX4007/MAX4008

High-Accuracy, 76V, High-Side

Current Monitors in SOT23

________________________________________________________________ Maxim Integrated Products 1

GND

REFOUT

16BIAS

5 N.C.

CLAMP

MAX4007

MAX4008

SOT23

TOP VIEW

Pin Configuration

Ordering Information

19-2743; Rev 3; 4/07

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.

Typical Operating Circuit appears at end of data sheet.

PART

PIN-PACKAGE

TOP MARK

PKG

CODE

MAX4007EUT-T

6 SOT23-6 ABNM

U6S-3

MAX4008EUT-T

6 SOT23-6 ABNO

U6S-3

Selector Guide

PART

PIN-

PACKAGE

INTERNAL

RESISTOR

TYPICAL

ACCURACY (%)

MAX4007EUT-T

6 SOT23-6

None 5

MAX4008EUT-T

6 SOT23-6

10kΩ 1

Note: All devices are specified over the -40°C to +85°C operating

temperature range.

Summary of content (10 pages)

PAGE 1
9-2743; Rev 3; 4/07 High-Accuracy, 76V, High-Side Current Monitors in SOT23 The MAX4007/MAX4008 precision, high-side, high-voltage current monitors are specifically designed for monitoring 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 current.
PAGE 2
MAX4007/MAX4008 High-Accuracy, 76V, High-Side Current Monitors in SOT23 ABSOLUTE MAXIMUM RATINGS CLAMP to GND ......................................................-0.3V to +80V BIAS, REF to GND ..................................................-0.3V to +80V OUT to GND .........................................-0.3V to (VCLAMP + 0.6V) Short Circuit, REF to GND ..........................................Continuous Current into Any Pin..........................................................
PAGE 3
High-Accuracy, 76V, High-Side Current Monitors in SOT23 (VBIAS = 40V, GND = 0V, REF = open, VOUT = 0V (MAX4007), CLAMP = open, TA = -40°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL Output Clamp Leakage MAX4007 Current Gain CONDITIONS MIN VCLAMP = 0 to 76V IOUT/IREF VOUT/IREF IREF = 250nA 0.09 IREF = 2.5mA 0.094 Power-Up Settling Time 0.0998 0.106 0.9 0.992 1.1 0.998 1.05 (ΔVOUT/VOUT) /ΔVBIAS MAX4008: IREF = 1mA VBIAS = 2.
PAGE 4
Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) BIAS CURRENT vs. REFERENCE CURRENT 100.00 VBIAS = 40V 1 0.1 10 10.00 IREF = 2.5mA BIAS CURRENT (mA) BIAS CURRENT (mA) BIAS CURRENT (mA) IREF = 2.5mA MAX4007/08 toc02 MAX4007/08 toc01 10 BIAS CURRENT vs. TEMPERATURE 1.00 MAX4007/08 toc03 BIAS CURRENT vs. SUPPLY VOLTAGE 1 0.1 IREF = 250nA 0.10 IREF = 250nA VBIAS = 40V 0.01 0.01 20 10n 26 100n 1μ 10μ GAIN ERROR vs.
PAGE 5
High-Accuracy, 76V, High-Side Current Monitors in SOT23 STARTUP DELAY (VBIAS = 5V, IREF = 250nA) STARTUP DELAY (VBIAS = 5V, IREF = 2.5mA) MAX4007/8 toc10 SHORT-CIRCUIT RESPONSE (VBIAS = 40V) MAX4007/8 toc12 MAX4007/8 toc11 TA = +85°C CH1 CH1 A 0V 0V VBIAS CH1 BIAS D.U.T. REF OUT CH1 B C D VBIAS BIAS D.U.T. REF OUT CH1 R1 CH2 CH2 R1 CH2 RREF 13pF 0A CH2 RREF RTEST 13pF 0V RTEST 0V 40ms/div 4ms/div RREF = 16.8mΩ R1 = 118mΩ RTEST = 1.
PAGE 6
High-Accuracy, 76V, High-Side Current Monitors in SOT23 MAX4007/MAX4008 Pin Description PIN NAME FUNCTION MAX4007 MAX4008 1 1 CLAMP 2 2 GND Ground 3 — OUT Current-Monitor Output. OUT sources a current of 1/10th IREF. 4 4 REF Reference Current Output. REF provides the source current to the cathode of the photodiode. 5 5 N.C. No Connection. Not internally connected. 6 6 BIAS Bias Voltage Input. Bias voltage for photodiode. — 3 OUT Current-Monitor Output.
PAGE 7
High-Accuracy, 76V, High-Side Current Monitors in SOT23 Applications Information Clamping the Monitor Output Voltage CLAMP provides a means for diode clamping the voltage at OUT; thus, VOUT is limited to VCLAMP + 0.6V. CLAMP can be connected to either an external supply, to BIAS, or may be left floating if voltage clamping is not required.
PAGE 8
High-Accuracy, 76V, High-Side Current Monitors in SOT23 MAX4007/MAX4008 Typical Operating Circuit +2.7V TO +76V 2.2μH 0.22μF 0.
PAGE 9
High-Accuracy, 76V, High-Side Current Monitors in SOT23 6LSOT.EPS PACKAGE OUTLINE, SOT 6L BODY 21-0058 I 1 2 _______________________________________________________________________________________ 9 MAX4007/MAX4008 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.
PAGE 10
MAX4007/MAX4008 High-Accuracy, 76V, High-Side Current Monitors in SOT23 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) PACKAGE OUTLINE, SOT 6L BODY 21-0058 I 2 2 Revision History Pages changed at Rev 3: 1, 3, 10 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product.