MAX4007.pdf 데이터시트 (총 10 페이지) - 파일 다운로드 MAX4007 데이타시트 다운로드

No Preview Available !

19-2743; Rev 3; 4/07
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
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
Ordering Information
PART
PIN-PACKAGE TOP MARK
PKG
CODE
MAX4007EUT-T 6 SOT23-6
MAX4008EUT-T 6 SOT23-6
ABNM
ABNO
U6S-3
U6S-3
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
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.

No Preview Available !

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..........................................................±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 = 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
Bias Voltage Range
Bias Quiescent Current
Reference Voltage
Thermal Shutdown
Engage Temperature
SYMBOL
VBIAS
IBIAS
VREF
TSHDN
CONDITIONS
Inferred from power-supply
rejection test
IREF = 250nA
IREF = 2.5mA
IREF = 2.5mA
REF shorted to GND, junction
temperature rising
MIN TYP
2.7
VBIAS - 1.1
90
3.6
VBIAS - 0.8
150
MAX
76
200
4
UNITS
V
µA
mA
V
°C
Trip-Point Temperature
Hysteresis
Input Current Limit
MAX4007
Output Current Noise
MAX4008
Output Voltage Noise
Output Resistance
Output Leakage
Output Voltage Range
Output Clamp Voltage
THYS
ILIM
iNOUT
eNOUT
ROUT
VOUT
VOUT -
VCLAMP
REF shorted to GND, junction
temperature falling
5
VREF = VBIAS - 5V
f = 0.1Hz to 10Hz
f = 0.1Hz to 10kHz
f = 0.1Hz to 10Hz
f = 0.1Hz to 10kHz
MAX4007
MAX4008
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
20
0.3
63
9.2
1240
0.041
0.63
1.3
12.5
50
5
10
REF = open
1
VBIAS = 2.7V to 76V, IREF = 0 to 1mA,
MAX4007: ΔIOUT/IOUT = ±1%,
MAX4008: ΔVOUT/IOUT = ±1%
0 to
VBIAS - 1.5
0 to
VBIAS - 0.85
0.6
°C
mA
pARMS
µVRMS
GΩ
MΩ
kΩ
pA
V
V
2 _______________________________________________________________________________________

No Preview Available !

High-Accuracy, 76V, High-Side
Current Monitors in SOT23
ELECTRICAL CHARACTERISTICS (continued)
(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
Output Clamp Leakage
MAX4007 Current Gain
MAX4008
Transimpedance Gain
Power-Supply Rejection
Ratio (PSRR)
SYMBOL
IOUT/IREF
VOUT/IREF
(ΔIOUT/IOUT)
/ΔVBIAS
(ΔVOUT/VOUT)
/ΔVBIAS
CONDITIONS
VCLAMP = 0 to 76V
IREF = 250nA
IREF = 2.5mA
IREF = 10mA, VBIAS = 12V
IREF = 250nA
IREF = 2.5mA
IREF = 10mA, VBIAS = 12V
MAX4007:
IREF = 250nA
VBIAS = 2.7V to 76V IREF = 1mA
MAX4008:
VBIAS = 2.7V to 76V
IREF = 1mA
MIN
0.09
0.094
0.9
0.95
TYP
1
0.0999
0.0998
0.0997
0.992
0.998
1.00
50
50
50
MAX
0.11
0.106
1.1
1.05
1000
1000
1000
UNITS
pA
mA/mA
V/mA
ppm/V
Power-Up Settling Time
IOUT settles within IREF = 250nA
tS
0.1%, CIN = 10nF
between REF and
GND
IREF = 2.5mA
7.5
90
ms
µs
Note 1: All devices are 100% tested at room temperature (TA = +25°C). All temperature limits are guaranteed by design.
_______________________________________________________________________________________ 3

No Preview Available !

High-Accuracy, 76V, High-Side
Current Monitors in SOT23
(TA = +25°C, unless otherwise noted.)
BIAS CURRENT
vs. SUPPLY VOLTAGE
10
IREF = 2.5mA
1
0.1
IREF = 250nA
0.01
2
8 14 20
SUPPLY VOLTAGE (V)
26
5
4
3
2
1
0
-1
-2
-3
-4
-5
10n
GAIN ERROR vs.
REFERENCE CURRENT
VBIAS = 40V
100n 1μ 10μ 100μ 1m 10m
IREF (A)
TRANSIENT RESPONSE
(VBIAS = 40V)
MAX4007/8 toc07
Typical Operating Characteristics
100.00
BIAS CURRENT
vs. REFERENCE CURRENT
VBIAS = 40V
10.00
1.00
0.10
0.01
10n 100n 1μ 10μ 100μ 1m 10m
IREF (A)
GAIN ERROR vs. TEMPERATURE
9
VBIAS = 40V
8
IREF = 10nA
7
6
5 IREF = 250nA
4 IREF = 2.5μA
3 IREF = 250μA
2 IREF = 2.5mA
1 IREF = 10mA
0
-1
-40
-15 10 35 60
TEMPERATURE (°C)
85
STARTUP DELAY
(VBIAS = 40V, IREF = 250nA)
MAX4007/8 toc08
BIAS CURRENT
vs. TEMPERATURE
10
IREF = 2.5mA
1
0.1 IREF = 250nA
0.01
-40
VBIAS = 40V
-15 10 35 60
TEMPERATURE (°C)
85
GAIN ERROR vs. BIAS VOLTAGE
0.2
0
-0.2
-0.4
-0.6 IREF = 250nA
-0.8 IREF = 25μA
-1.0 IREF = 2.5mA
-1.2 IREF = 5mA
-1.4
2.0
20.5 39.0 57.5 76.0
VBIAS (V)
STARTUP DELAY
(VBIAS = 40V, IREF = 2.5mA)
MAX4007/8 toc09
A
B
BGND
40V
BIAS
D.U.T.
REF OUT
CH1
6.3kΩ
CH2
10kΩ
12.1kΩ
AGND
400ns/div
A: CH2, 5V/div, IREF = 0 TO 2.5mA
B: CH1, 1V/div, IOUT = 0 TO 0.25mA
CH1
0V
CH2
0V
VBIAS
CH1
BIAS
D.U.T.
REF OUT
R1
CH2
RREF
13pF
RTEST
RREF = 158mΩ
R1 = 118mΩ
RTEST = 1.67mΩ
CH1: 10V/div
CH2: 20mV/div
20ms/div
CH1
0V
CH2
0V
VBIAS
CH1
BIAS
D.U.T.
REF OUT
R1
CH2
RREF
13pF
RTEST
RREF = 15.8kΩ
R1 = 0Ω
RTEST = 140kΩ
CH1: 10V/div
CH2: 10V/div
20ms/div
4 _______________________________________________________________________________________

No Preview Available !

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