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MAX4004/MAX4006
High-Accuracy, High-Side Current Monitors
in SOT23
General Description
The MAX4004/MAX4006 precision, high-side, current
monitors are specifically designed for monitoring photo-
diode 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 MAX4004 is a current propor-
tional to the reference current. The monitor output of the
MAX4006 is a voltage proportional to the reference cur-
rent. The current monitors have six decades of dynamic
range and monitor reference current of 250nA to 2.5mA
with better than 5% accuracy. The photodiode current can
be monitored from 10nA to 10mA with reduced accuracy.
The MAX4004/MAX4006 accept a +2.7V to +22V sup-
ply voltage, suitable for PIN photodiode applications.
(For higher voltage applications, refer to the MAX4007/
MAX4008 data sheet.) Internal current limiting (20mA,
typ) protects the device against short-circuit-to-ground
or excessive current conditions. A clamp diode protects
the monitor output from overvoltage. Additionally, these
devices feature thermal shutdown if the die temperature
reaches +150°C.
The MAX4004/MAX4006 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
Selector Guide
PART
MAX4004EUT-T
MAX4006EUT-T
PIN-PACKAGE
INTERNAL
RESISTOR
TYPICAL
ACCURACY
6 SOT23
None
5%
6 SOT23
10kΩ
1%
Features
● Wide Reference Current Dynamic Range
• Guaranteed 250nA to 2.5mA with 5% Accuracy
• Extended 10nA to 10mA with 10% Monitor
Accuracy
● Current (MAX4004) or Voltage (MAX4006) Monitor
Output
● Reference Current-Limit Protection (20mA, typ)
● Voltage Clamp Protects Subsequent Output Circuitry
● +2.7V to +22V Wide Voltage Range Operation
● 6-Pin SOT23 Packages
Ordering Information
PART
PIN-PACKAGE
TOP MARK
MAX4004EUT-T
MAX4004EUT+T
MAX4006EUT-T
6 SOT23
6 SOT23
6 SOT23
ABNL
ABNN
Note: All devices are specified over the -40°C to +85°C operat-
ing temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration
TOP VIEW
CLAMP 1
6 BIAS
MAX4004
GND 2 MAX4006 5 N.C.
OUT 3
4 REF
SOT23
Typical Operating Circuit appears at end of data sheet.
19-2742; Rev 3; 6/15

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MAX4004/MAX4006
High-Accuracy, High-Side Current Monitors
in SOT23
Absolute Maximum Ratings
CLAMP to GND......................................................-0.3V to +25V
BIAS, REF to GND.................................................-0.3V to +25V
OUT to GND........................................-0.3V to (VCLAMP + 0.6V)
Short-Circuit, REF to GND.........................................Continuous
Current into any Pin..........................................................±30mA
Continuous Power Dissipation (TA = +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C)...........696mW
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
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.
Electrical Characteristics
(VBIAS = 5V, GND = 0V, REF = Open, VOUT = 0V (MAX4004), CLAMP = Open, TA = -40°C to +85°C. Typical values are at TA = +25°C,
unless otherwise noted.) (Note 1)
PARAMETER
Bias Voltage Range
Bias Quiescent Current
Reference Voltage
Thermal Shutdown
Engage Temperature
Trip-Point Temperature
Hysteresis
Input Current Limit
MAX4004
Output Current Noise
MAX4006
Output Voltage Noise
Output Resistance
Output Leakage
Output Voltage Range
SYMBOL
VBIAS
IBIAS
VREF
TSHDN
THYS
ILIM
iNOUT
eNOUT
ROUT
VOUT
CONDITIONS
Inferred from power-supply rejection test
IREF = 250nA
IREF = 2.5mA
IREF = 2.5mA
REF shorted to GND, junction
temperature rising
REF shorted to GND, junction
temperature falling
VREF = VBIAS - 5V
f = 0.1Hz to 10Hz
f = 0.1Hz to 10kHz
f = 0.1Hz to 10Hz
f = 0.1Hz to 10kHz
MAX4004
MAX4006
REF = open
IREF = 250nA
IREF = 2.5mA
IREF = 250nA
IREF = 2.5mA
IREF = 250nA
IREF = 2.5mA
IREF = 250nA
IREF = 2.5mA
IREF = 250nA
IREF = 2.5mA
VBIAS = 2.7V to 22V, IREF = 0 to 1mA,
MAX4004: ΔIOUT/IOUT = ±1%,
MAX4006: ΔIVOUT/IOUT = ±1%
MIN
2.7
VBIAS - 1.1
0 to VBIAS
- 1.5
TYP
40
3.6
VBIAS - 0.8
150
5
20
0.3
63
9.2
1240
0.041
0.63
1.3
12.5
50
5
10
1
0 to VBIAS -
0.85
MAX
22
100
4
UNITS
V
µA
mA
V
°C
°C
mA
pARMS
µVRMS
GΩ
MΩ
kΩ
pA
V
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MAX4004/MAX4006
High-Accuracy, High-Side Current Monitors
in SOT23
Electrical Characteristics (continued)
(VBIAS = 5V, GND = 0V, REF = Open, VOUT = 0V (MAX4004), CLAMP = Open, TA = -40°C to +85°C. Typical values are at TA = +25°C,
unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
Output Clamp Voltage
Output Clamp Leakage
MAX4004 Current Gain
MAX4006
Transimpedance Gain
Power-Supply
Rejection Ratio (PSRR)
VOUT -
VCLAMP
IOUT/IREF
VOUT/IREF
(ΔIOUT/IOUT)
/ΔVBIAS
(ΔVOUT/VOUT)
/ΔVBIAS
VCLAMP = 0 to 22V
IREF = 250nA
IREF = 2.5mA
IREF = 10mA, VBIAS = 12V
IREF = 250nA
IREF = 2.5mA
IREF = 10mA, VBIAS = 12V
MAX4004:
VBIAS = 2.7V to 22V
IREF = 250nA
IREF = 1mA
MAX4006:
VBIAS = 2.7V to 22V
IREF = 1mA
IOUT settles within
IREF = 250nA
Power-Up Settling Time tS 0.1%, CIN = 10nF
between REF and GND IREF = 2.5mA
MIN
0.09
0.094
0.9
0.95
TYP
0.6
1
0.099
0.095
0.098
0.995
0.998
0.992
50
50
50
7.5
90
MAX
0.11
0.106
1.1
1.05
1000
1000
1000
Note 1: All devices are 100% tested at room temperature (TA = +25°C). All temperature limits are guaranteed by design.
UNITS
V
pA
mA/mA
V/mA
ppm/V
ms
µs
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MAX4004/MAX4006
High-Accuracy, High-Side Current Monitors
in SOT23
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
BIAS CURRENT
vs. SUPPLY VOLTAGE
10
IREF = 2.5mA
1
BIAS CURRENT
vs. REFERENCE CURRENT
10
VBIAS = 5V
1
BIAS CURRENT
vs. TEMPERATURE
10
IREF = 2.5mA
VBIAS = 5V
1
0.1 IREF = 250nA
0.1
0.1
IREF = 250nA
0.01
2
8 14 20
SUPPLY VOLTAGE (V)
0.01 0.01
26 10n 100n 1µ 10µ 100µ 1m 10m -40 -15 10 35 60
IREF (A)
TEMPERATURE (°C)
GAIN ERROR
vs. REFERENCE CURRENT
5
4 VBIAS = 5V
GAIN ERROR vs. TEMPERATURE
1.0
0.5
IREF = 10nA
VBIAS = 5V
30
2 -0.5
1 -1.0
0 -1.5 IREF = 250nA
-1 -2.0 IREF = 2.5µA
-2 -2.5 IREF = 250µA
-3 -3.0 IREF = 2.5A
-4
-5
10n 100n 1µ 10µ 100µ 1m 10m
IREF (A)
-3.5 IREF = 5mA
-4.0
-40
-15 10 35 60
TEMPERATURE (°C)
85
GAIN ERROR
vs. BIAS VOLTAGE
0.2
0
-0.2 IREF = 250nA
-0.4 IREF = 25µA
-0.6
-0.8
IREF = 2.5mA
-1.0
-1.2
-1.4
2
IREF = 5mA
7 12
VBIAS (V)
17
22
IREF
1.0mA/div
0A
TRANSIENT RESPONSE
(VBIAS = 5V)
MAX4004/6 toc07
IOUT
0.1mA/div
0A
400ns/div
85
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MAX4004/MAX4006
High-Accuracy, High-Side Current Monitors
in SOT23
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
STARTUP DELAY
(VBIAS = 5V, IREF = 250nA)
STARTUP DELAY
(VBIAS = 5V, IREF = 2.5mA)
CH1
0V
CH2
0V
VBIAS
CH1
BIAS
D.U.T.
REF OUT
RREF
R1
CH2
13pF
RTEST
RREF = 16.8M
R1 = 118M
RTEST = 1.67M
CH1: 2V/div
CH2: 10mV/div
40ms/div
CH1
0V
CH2
0V
VBIAS
CH1
BIAS
D.U.T.
REF OUT
RREF
R1
CH2
13pF
RTEST
RREF = 1.68k
R1 = 0
RTEST = 14.0k
CH1: 2V/div
CH2: 1V/div
4ms/div
STARTUP DELAY
(VBIAS = 2.7V, IREF = 250nA)
CH1
0V
CH2
0V
VBIAS
CH1
BIAS
D.U.T.
REF OUT
RREF
R1
CH2
13pF
RTEST
RREF = 8.8M
R1 = 0
RTEST = 8.1M
CH1: 1V/div
CH2: 50mV/div
10ms/div
STARTUP DELAY
(VBIAS = 2.7V, IREF = 2.5mA)
CH1
0V
CH2
0V
VBIAS
CH1
BIAS
D.U.T.
REF OUT
RREF
R1
CH2
13pF
RTEST
RREF = 794
R1 = 0
RTEST = 4.01k
CH1: 1V/div
CH2: 200mV/div
10ms/div
SHORT-CIRCUIT RESPONSE
(VBIAS = 5V)
TA = +148°C
A
CH1
0A
B
20ms/div
CH1: IBIAS, 10mA/div
A: REF SHORTS TO GND
B: CURRENT LIMIT ACTIVE
C: THERMAL SHUTDOWN
C
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