DATASHEET
ISL70591SEH, ISL70592SEH, ISL73591SEH, ISL73592SEH
Radiation Hardened 100µA and 1mA Precision Current Sources
FN9335
Rev.0.00
Aug 30, 2018
The
ISL70591SEH, ISL73591SEH, ISL70592SEH,
and
ISL73592SEH
are radiation hardened precision 100µA
and 1mA current source ICs. The devices have excellent
accuracy of ±1% over a wide operating voltage range of
3V to 40V and over a temperature range of -55°C to
+125°C. Fabricated with the Renesas proprietary PR40
Silicon On Insulator (SOI) process, the devices are
immune to single event latch-up.
The high output impedance of the devices make them
insensitive to the voltage drops across long lines. They
can withstand a forward operating voltage of 40V and a
reverse voltage of -0.5V.
The ISL7x591SEH and ISL7x592SEH are two terminal
floating current sources and that allows them to be used
in high side, low side, and dual side load applications
such as sensor excitation, biasing networks, low voltage
references, floating voltage references, and ramp
generators. The current sources were primarily designed
for thermistor and other sensor excitation applications
widely used in space crafts.
The ISL7x591SEH and ISL7x592SEH are available in a
4 Ld ceramic flatpack and die forms. The temperature
range is -55°C to +125°C.
Features
• Electrically screened to DLA SMD
5962-18217
• Wide operating voltage range: 3V to 40V
• High initial accuracy (+V = 20V at +25°C):
• ISL7x591SEH: ±0.34%
• ISL7x592SEH: ±0.30%
• High output impedance:
• ISL7x591SEH: 189MΩ (typical)
• ISL7x592SEH: 14MΩ (typical)
• Completely floating: No ground connection
• Radiation acceptance testing - ISL70591SEH and
ISL70592SEH
• High dose rate (50-300rad(Si)/s): 100krad(Si)
• Low dose rate (0.01rad(Si)/s): 75krad(Si)
• Radiation acceptance testing - ISL73591SEH and
ISL73592SEH
• Low dose rate (0.01rad(Si)/s): 75krad(Si)
• SEE hardness
• No SEB/SEL LET
TH,
+V = 35V: 86MeV•cm
2
/mg
• SET duration (time recovery) ≤125µs
Applications
• Sensor excitation
• Biasing network
• Low voltage references
• Ramp generators
Related Literature
For a full list of related documents, visit our website:
•
ISL70591SEH, ISL70592SEH, ISL73591SEH,
and
ISL73592SEH
product pages.
FN9335 Rev.0.00
Aug 30, 2018
Page 1 of 23
ISL70591SEH, ISL70592SEH, ISL73591SEH, ISL73592SEH
.
+15V
ISL70591SEH
R Sensor
ISL71840SEH
MUX
+15V
Signal
Conditioning
Circuitry
ISL70591SEH
-15V
RTD / Thermistor
Figure 1. Typical Application
100.3
100.2
100.1
Current (mA)
1.004
1.003
1.002
1.001
1.000
0.999
0.998
Current (μA)
100.0
99.9
99.8
99.7
99.6
99.5
0
5
10
15
20
-55°C
+100°C
25
30
35
+25°C
+125°C
40
45
0.997
0.996
0
5
10
15
20
-55°C
+100°C
25
30
35
+25°C
+125°C
40
45
+Voltage (V)
+Voltage (V)
Figure 2. Output Current vs +V Voltage vs Temperature
for the ISL7X591SEH
Figure 3. Output Current vs +V Voltage vs Temperature
for the ISL7X592SEH
FN9335 Rev.0.00
Aug 30, 2018
Page 2 of 23
ISL70591SEH, ISL70592SEH, ISL73591SEH, ISL73592SEH
Contents
1.
1.1
1.2
1.3
1.4
1.5
2.
2.1
2.2
2.3
2.4
2.5
3.
4.
4.1
4.2
4.3
4.4
4.5
4.6
5.
6.
7.
8.
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Application Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
4
5
5
6
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Thermal Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Test Circuits and Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Typical Performance Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Applications Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Coefficient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Floating Current Source Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Multiple Current Sources in Parallel for Higher Drive Current . . . . . . . . . . . . . . .
Circuit Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
17
17
17
18
18
Die Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Metallization Mask Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
FN9335 Rev.0.00
Aug 30, 2018
Page 3 of 23
ISL70591SEH, ISL70592SEH, ISL73591SEH, ISL73592SEH
1. Overview
1.
1.1
Overview
Block Diagram
1 +V
4 -V
Figure 4. Block Diagram
1.2
Ordering Information
Part Number
(Note
2)
ISL70591SEHVF
ISL70591SEHVX
ISL73591SEHVF
ISL73591SEHVX
ISL73591SEHF/PROTO, (Note
3)
ISL70591SEHF/PROTO, (Note
3)
ISL70591SEHX/SAMPLE, (Note
3)
ISL70592SEHVF
ISL70592SEHVX
ISL73592SEHVF
ISL73592SEHVX
ISL70592SEHF/PROTO, (Note
3)
ISL70592SEHX/SAMPLE, (Note
3)
ISL73592SEHF/PROTO, (Note
3)
ISL70591SEHEVAL1Z, (Note
4)
ISL70592SEHEVAL1Z, (Note
4)
Temperature
Range (°C)
-55 to +125
-55 to +125
-55 to +125
-55 to +125
-55 to +125
-55 to +125
+25
-55 to +125
-55 to +125
-55 to +125
-55 to +125
-55 to +125
+25
-55 to +125
Evaluation Board
Evaluation Board
Package
(RoHS Compliant)
4 Ld Ceramic Flatpack
Die
4 Ld Ceramic Flatpack
Die
4 Ld Ceramic Flatpack
4 Ld Ceramic Flatpack
Die
4 Ld Ceramic Flatpack
Die
4 Ld Ceramic Flatpack
Die
4 Ld Ceramic Flatpack
Die
4 Ld Ceramic Flatpack
K4.A
K4.A
K4.A
K4.A
K4.A
K4.A
K4.A
Package
Drawing
K4.A
Ordering / SMD
Number (Note
1)
5962R1821701VXC
5962R1821701V9A
5962L1821702VXC
5962L1821702V9A
N/A
N/A
N/A
5962R1821703VXC
5962R1821703V9A
5962L1821704VXC
5962L1821704V9A
N/A
N/A
N/A
N/A
N/A
Notes:
1. Specifications for Rad Hard QML devices are controlled by the Defense Logistics Agency Land and Maritime (DLA). The SMD
numbers must be used when ordering.
2. These Pb-free Hermetic packaged products employ 100% Au plate - e4 termination finish, which is RoHS compliant and
compatible with both SnPb and Pb-free soldering operations.
3. The /PROTO and /SAMPLE are not rated or certified for Total Ionizing Dose (TID) or Single Event Effect (SEE) immunity. These
parts are intended for engineering evaluation purposes only. The /PROTO parts meet the electrical limits and conditions over-
temperature specified in the DLA SMD and are in the same form and fit as the qualified device. The /SAMPLE parts are capable
of meeting the electrical limits and conditions specified in the DLA SMD at +25°C only. The /SAMPLE parts do not receive 100%
screening over-temperature to the DLA SMD electrical limits. These part types do not come with a Certificate of Conformance
because they may not have been Radiation Assurance tested and they are not DLA qualified devices.
4. Evaluation boards use the /PROTO parts and /PROTO parts are not rated or certified for Total Ionizing Dose (TID) or Single
Event Effect (SEE) immunity.
FN9335 Rev.0.00
Aug 30, 2018
Page 4 of 23
ISL70591SEH, ISL70592SEH, ISL73591SEH, ISL73592SEH
Table 1. ISL7x59xSEH Product Family Feature Table
Specification
Output Current
Current Temperature Coefficient
Output Impedance
HDR 100krad(Si)
LDR 75krad(Si)
N/A: Not Applicable
ISL70591SEH
100
µ
A
2.25nA/°C
189MΩ
Yes
Yes
ISL73591SEH
100
µ
A
2.25nA/°C
189MΩ
N/A
Yes
ISL70592SEH
1mA
19nA/°C
14MΩ
Yes
Yes
1. Overview
ISL73592SEH
1mA
19nA/°C
14MΩ
N/A
Yes
1.3
Pin Configurations
ISL70591SEH, ISL70592SEH
(4 LD CDFP)
Top View
1
2
+V
DNC
4
3
-V
DNC
Note: The ESD triangular mark is indicative of Pin 1.
It is a part of the device marking and is placed on the lid
in the quadrant where Pin 1 is located.
1.4
Pin Descriptions
Pin Name
+V
DNC
DNC
-V
Package
Lid
-
ESD
Circuit
1
Description
Positive voltage lead, range 3V to 40V with respect to -V.
DNC (Do Not Connect) = OPEN (Float). Internally connected.
DNC (Do Not Connect) = OPEN (Float). Internally connected.
Negative voltage lead.
Internally connected to -V (Pin 4).
Pin Number
1
2
3
4
-
+V
+
I
-
-V
ESD
CLAMP
DNC
DNC
Figure 5. ESD Circuit 1
FN9335 Rev.0.00
Aug 30, 2018
Page 5 of 23
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