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PDF MAX4008 Data sheet ( Hoja de datos )
| Número de pieza | MAX4008 | |
| Descripción | (MAX4007 / MAX4008) High-Side Current Monitors | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-2743; Rev 1; 5/03
High-Accuracy, 76V, High-Side
Current Monitors in SOT23
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
Selector Guide
PART
MAX4007EUT-T
MAX4008EUT-T
PIN-
PACKAGE
6 SOT23-6
6 SOT23-6
INTERNAL TYPICAL
RESISTOR ACCURACY (%)
None
5
10kΩ
1
Features
o Wide Reference Current Dynamic Range
Guaranteed 250nA to 2.5mA with 5% Monitor
Accuracy
Extended 10nA to 10mA with 10% Monitor
Accuracy
o Current (MAX4007) or Voltage (MAX4008) Monitor
Outputs
o Reference Current-Limit Protection (20mA, typ)
o Voltage Clamp Protects Subsequent Output
Circuitry
o +2.7V to +76V Wide Voltage Range Operation
o 6-Pin SOT23 Packages
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
TOP
MARK
MAX4007EUT-T -40°C to +85°C 6 SOT23-6
ABNM
MAX4008EUT-T -40°C to +85°C 6 SOT23-6
ABNO
Pin Configuration
TOP VIEW
CLAMP 1
6 BIAS
MAX4007
GND 2 MAX4008 5 N.C.
Typical Operating Circuit appears at end of data sheet.
OUT 3
4 REF
SOT23
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
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High-Accuracy, 76V, High-Side
Current Monitors in SOT23
(TA = +25°C, unless otherwise noted.)
STARTUP DELAY
(VBIAS = 5V, IREF = 250nA)
MAX4007/8 toc10
Typical Operating Characteristics (continued)
STARTUP DELAY
(VBIAS = 5V, IREF = 2.5mA)
MAX4007/8 toc11
SHORT-CIRCUIT RESPONSE
(VBIAS = 40V)
MAX4007/8 toc12
TA = +85°C
CH1
0V
CH2
0V
VBIAS
CH1
BIAS
D.U.T.
REF OUT
R1
CH2
RREF
13pF
RTEST
CH1
0V
CH2
0V
VBIAS
CH1
BIAS
D.U.T.
REF OUT
R1
CH2
RREF
13pF
RTEST
A
CH1
0A
B
RREF = 16.8mΩ
R1 = 118mΩ
RTEST = 1.67mΩ
CH1: 2V/div
CH2: 10V/div
40ms/div
RREF = 1.68kΩ
R1 = 0Ω
RTEST = 14.0kΩ
CH1: 2V/div
CH2: 1V/div
SHORT-CIRCUIT RESPONSE
(VBIAS = 76V)
MAX4007/8 toc13
TA = +85°C
4ms/div
A
CH1
0A
BD
C
40ms/div
CH1: IBIAS, 10.0mA/div
A: REF SHORTS TO GND
B: CURRENT LIMIT ACTIVE
C: THERMAL SHUTDOWN
D: POST COOL-DOWN RETRY
20ms/div
CH1: IBIAS, 10.0mA/div
A: REF SHORTS TO GND
B: CURRENT LIMIT ACTIVE
C: THERMAL SHUTDOWN
D: POST COOL-DOWN RETRY
VOLTAGE DROP
vs. REFERENCE CURRENT
1.40
VBIAS = 2.7V
1.20
1.00
0.80
A
0.60
B
0.40 C
0.20
D
0
100n
A: TA = -40°C
B: TA = +25°C
C: TA = +85°C
D: TA = +100°C
1µ 10µ 100µ 1m 10m
REFERENCE CURRENT (A)
D
C
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet MAX4008.PDF ] | |
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