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Электронный компонент: MAX4008

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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 +150C.
The MAX4007/MAX4008 are available in tiny, space-
saving 6-pin SOT23 packages, and operate over the
extended temperature range of -40C to +85C.
Applications
Photodiode Current-Monitoring Systems
Portable Instrumentation
Medical Instrumentation
Laboratory Instrumentation
Consumer Electronics
Current-to-Voltage Conversion
Level Translation
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
MAX4007/MAX4008
High-Accuracy, 76V, High-Side
Current Monitors in SOT23
________________________________________________________________ Maxim Integrated Products
1
GND
REF
OUT
1
6
BIAS
5
N.C.
CLAMP
MAX4007
MAX4008
SOT23
TOP VIEW
2
3
4
Pin Configuration
Ordering Information
19-2743; Rev 1; 5/03
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
TEMP RANGE
PIN-PACKAGE
TOP
MARK
MAX4007EUT-T -40C to +85C
6 SOT23-6
ABNM
MAX4008EUT-T -40C to +85C
6 SOT23-6
ABNO
Selector Guide
PART
PIN-
PACKAGE
INTERNAL
RESISTOR
TYPICAL
ACCURACY (%)
MAX4007EUT-T
6 SOT23-6
None
5
MAX4008EUT-T
6 SOT23-6
10k
1
MAX4007/MAX4008
High-Accuracy, 76V, High-Side
Current Monitors in SOT23
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
BIAS
= 40V, GND = 0V, REF = open, V
OUT
= 0V (MAX4007), CLAMP = open, -40C to +85C. Typical values are at T
A
= +25C,
unless otherwise noted.) (Note 1)
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.
CLAMP to GND ......................................................-0.3V to +80V
BIAS, REF to GND ..................................................-0.3V to +80V
OUT to GND .........................................-0.3V to (V
CLAMP
+ 0.6V)
Short Circuit, REF to GND ..........................................Continuous
Current into Any Pin..........................................................30mA
Continuous Power Dissipation (T
A
= +70C)
6-Pin SOT23 (derate 8.7mW/C above +70C)............696mW
Operating Temperature Range ...........................-40C to +85C
Junction Temperature ......................................................+150C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Bias Voltage Range
V
BIAS
Inferred from power-supply
rejection test
2.7
76
V
I
REF
= 250nA
90
200
A
Bias Quiescent Current
I
BIAS
I
REF
= 2.5mA
3.6
4
mA
Reference Voltage
V
REF
I
REF
= 2.5mA
V
BIAS -
1.1
V
BIAS -
0.8
V
Thermal Shutdown
Engage Temperature
T
SHDN
REF shorted to GND, junction
temperature rising
150
C
Trip-Point Temperature
Hysteresis
T
HYS
REF shorted to GND, junction
temperature falling
5
C
Input Current Limit
I
LIM
V
REF
= V
BIAS
- 5V
20
mA
I
REF
= 250nA
0.3
f = 0.1Hz to 10Hz
I
REF
= 2.5mA
63
I
REF
= 250nA
9.2
MAX4007
Output Current Noise
iNOUT
f = 0.1Hz to 10kHz
I
REF
= 2.5mA
1240
pA
RMS
I
REF
= 250nA
0.041
f = 0.1Hz to 10Hz
I
REF
= 2.5mA
0.63
I
REF
= 250nA
1.3
MAX4008
Output Voltage Noise
e
NOUT
f = 0.1Hz to 10kHz
I
REF
= 2.5mA
12.5
V
RMS
I
REF
= 250nA
50
G
MAX4007
I
REF
= 2.5mA
5
M
Output Resistance
R
OUT
MAX4008
10
k
Output Leakage
REF = open
1
pA
Output Voltage Range
V
OUT
V
BI AS
= 2.7V to 76V , I
RE F
= 0 to 1m A,
MAX4007:
I
OUT
/I
OUT
=
1%,
MAX4008:
V
OUT
/I
OUT
=
1%
0 to
V
BIAS
- 1.5
0 to
V
BIAS
- 0.85
V
Output Clamp Voltage
V
OUT
-
V
CLAMP
0.6
V
MAX4007/MAX4008
High-Accuracy, 76V, High-Side
Current Monitors in SOT23
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
BIAS
= 40V, GND = 0V, REF = open, V
OUT
= 0V (MAX4007), CLAMP = open, -40C to +85C. Typical values are at T
A
= +25C,
unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Output Clamp Leakage
V
CLAMP
= 0 to 76V
1
pA
I
REF
= 250nA
0.09
0.0999
0.11
I
REF
= 2.5mA
0.094
0.095
0.106
MAX4007 Current Gain
I
OUT
/I
REF
I
REF
= 10mA, V
BIAS
= 12V
0.0997
mA/mA
I
REF
= 250nA
0.9
0.992
1.1
I
REF
= 2.5mA
0.95
0.998
1.05
MAX4008
Transimpedance Gain
V
OUT
/I
REF
I
REF
= 10mA, V
BIAS
= 12V
1.00
V/mA
I
REF
= 250nA
50
1000
(
I
OU T
/I
OU T
)
/
V
BIAS
MAX4007:
V
BIAS
= 2.7V to 76V I
REF
= 1mA
50
1000
Power-Supply Rejection
Ratio (PSRR)
(
V
OU T
/V
OU T
)
/
V
BIAS
MAX4008:
V
BIAS
= 2.7V to 76V
I
REF
= 1mA
50
1000
ppm/V
I
REF
= 250nA
7.5
ms
Power-Up Settling Time
t
S
I
OUT
settles within
0.1%, C
IN
= 10nF
between REF and
GND
I
REF
= 2.5mA
90
s
Note 1: All devices are 100% tested at room temperature (T
A
= +25C). All temperature limits are guaranteed by design.
MAX4007/MAX4008
High-Accuracy, 76V, High-Side
Current Monitors in SOT23
4
_______________________________________________________________________________________
Typical Operating Characteristics
(T
A
= +25C, unless otherwise noted.)
GAIN ERROR vs. TEMPERATURE
MAX4007/08 toc05
TEMPERATURE (
C)
-15
10
35
60
85
-40
GAIN ERROR (%)
0
1
2
3
4
5
6
7
8
9
-1
V
BIAS
= 40V
I
REF
= 10nA
I
REF
= 10mA
I
REF
= 2.5mA
I
REF
= 250
A
I
REF
= 2.5
A
I
REF
= 250nA
GAIN ERROR vs. BIAS VOLTAGE
MAX4007/08 toc06
V
BIAS
(V)
20.5
39.0
57.5
76.0
2.0
GAIN ERROR (%)
-1.4
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0
0.2
I
REF
= 5mA
I
REF
= 2.5mA
I
REF
= 25
A
I
REF
= 250nA
AGND
B
BGND
A
400ns/div
TRANSIENT RESPONSE
(V
BIAS
= 40V)
MAX4007/8 toc07
A: CH2, 5V/div, I
REF
= 0 TO 2.5mA
B: CH1, 1V/div, I
OUT
= 0 TO 0.25mA
40V
BIAS
CH2
CH1
6.3k
10k
12.1k
D.U.T.
REF
OUT
0V
0V
CH2
CH1
STARTUP DELAY
(V
BIAS
= 40V, I
REF
= 250nA)
MAX4007/8 toc08
20ms/div
R
REF
= 158m
R1 = 118m
R
TEST
= 1.67m
CH1: 10V/div
CH2: 20mV/div
V
BIAS
R
TEST
R
REF
BIAS
CH2
13pF
CH1
R1
D.U.T.
REF
OUT
BIAS CURRENT
vs. SUPPLY VOLTAGE
MAX4007/08 toc01
SUPPLY VOLTAGE (V)
BIAS CURRENT (mA)
20
14
8
0.1
1
10
0.01
2
26
I
REF
= 2.5mA
I
REF
= 250nA
BIAS CURRENT
vs. REFERENCE CURRENT
MAX4007/08 toc02
I
REF
(A)
BIAS CURRENT (mA)
1m
100
10
1
100n
0.10
1.00
10.00
100.00
0.01
10n
10m
V
BIAS
= 40V
BIAS CURRENT
vs. TEMPERATURE
MAX4007/08 toc03
TEMPERATURE (
C)
BIAS CURRENT (mA)
60
35
10
-15
0.1
1
10
0.01
-40
85
I
REF
= 2.5mA
I
REF
= 250nA
V
BIAS
= 40V
GAIN ERROR vs.
REFERENCE CURRENT
MAX4007/08 toc04
I
REF
(A)
100n
1
10
100
1m
10m
10n
GAIN ERROR (%)
-4
-3
-2
-1
0
1
2
3
4
5
-5
V
BIAS
= 40V
0V
0V
CH2
CH1
STARTUP DELAY
(V
BIAS
= 40V, I
REF
= 2.5mA)
MAX4007/8 toc09
20ms/div
R
REF
= 15.8k
R1 = 0
R
TEST
= 140k
CH1: 10V/div
CH2: 10V/div
V
BIAS
R
TEST
R
REF
BIAS
CH2
13pF
CH1
R1
D.U.T.
REF
OUT
MAX4007/MAX4008
High-Accuracy, 76V, High-Side
Current Monitors in SOT23
_______________________________________________________________________________________
5
0V
0V
CH2
CH1
STARTUP DELAY
(V
BIAS
= 5V, I
REF
= 250nA)
MAX4007/8 toc10
40ms/div
R
REF
= 16.8m
R1 = 118m
R
TEST
= 1.67m
CH1: 2V/div
CH2: 10V/div
V
BIAS
R
TEST
R
REF
BIAS
CH2
13pF
CH1
R1
D.U.T.
REF
OUT
0V
0V
CH2
CH1
STARTUP DELAY
(V
BIAS
= 5V, I
REF
= 2.5mA)
MAX4007/8 toc11
4ms/div
R
REF
= 1.68k
R1 = 0
R
TEST
= 14.0k
CH1: 2V/div
CH2: 1V/div
V
BIAS
R
TEST
R
REF
BIAS
CH2
13pF
CH1
R1
D.U.T.
REF
OUT
CH1
0A
20ms/div
SHORT-CIRCUIT RESPONSE
(V
BIAS
= 40V)
MAX4007/8 toc12
CH1: I
BIAS
, 10.0mA/div
A: REF SHORTS TO GND
B: CURRENT LIMIT ACTIVE
C: THERMAL SHUTDOWN
D: POST COOL-DOWN RETRY
B
D
C
A
T
A
= +85
C
CH1
0A
40ms/div
SHORT-CIRCUIT RESPONSE
(V
BIAS
= 76V)
MAX4007/8 toc13
CH1: I
BIAS
, 10.0mA/div
A: REF SHORTS TO GND
B: CURRENT LIMIT ACTIVE
C: THERMAL SHUTDOWN
D: POST COOL-DOWN RETRY
B
D
C
A
T
A
= +85
C
VOLTAGE DROP
vs. REFERENCE CURRENT
MAX4007/08 toc14
REFERENCE CURRENT (A)
1
10
100
1m
10m
100n
V
BIAS
- V
REF
(V)
0
0.20
0.40
0.60
0.80
1.00
1.20
1.40
V
BIAS
= 2.7V
A: T
A
= -40
C
B: T
A
= +25
C
C: T
A
= +85
C
D: T
A
= +100
C
A
B
C
D
Typical Operating Characteristics (continued)
(T
A
= +25C, unless otherwise noted.)