DATASHEET
ISL71590SEH, ISL73590SEH
Radiation Hardened, 2-Terminal Temperature Transducer
FN8376
Rev.3.00
Sep 14, 2018
The ISL71590SEH and ISL73590SEH are temperature-to-current
transducers possessing two terminals. They have a high
impedance current output that allows them to be insensitive to
voltage drops across long lines. When provided a differential
voltage between 4V and 33V, the devices act as constant current
regulators that generate a current equal to 1µA/Kelvin (K).
Features
• 50krad(Si) low dose rate (ELDRS) shift. . . . . . . . . . . . . .< 1°C
• Linear output current. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1µA/K
• Wide power supply input range (V+ to V-) . . . . . . . . 4V to 33V
• Low power consumption . . . . . . . . . . . . . . . . . . . 1.5mW at 5V
These devices are specified across the -55°C to +125°C
temperature range and with ±1.7°C accuracy without the
need of additional circuitry, and also capable of operating up
to +150°C. With power requirements as low as 1.5mW (5V at
+25°C), they are an ideal choice for remote sensing
applications as any well-insulated twisted pair cable will allow
for proper operation. They can be used in several additional
applications including temperature compensation networks,
flow rate analysis, anemometry, and biasing proportional to
absolute temperature.
• High output impedance provides excellent rejection to
variations in the supply line
• Additional linearization circuitry is not needed for operation
• Operating temperature range. . . . . . . . . . . .-55°C to +150°C
• QML qualified per MIL-PRF-38535 requirements
• Radiation environment
2
- SEL/SEB LET
. . . . . . . . . . . . . . . . . . . . 86.4MeV•cm /mg
TH
- Total dose, high dose rate. . . . . . . . . . . . . . . . 300krad(Si)*
- Total dose, low dose rate . . . . . . . . . . . . . . . . . . 50krad(Si)
*Applies to the ISL71590SEH only.
The high output impedance (>10MΩ) leaves plenty of room for
variations in the power supply voltage. The ISL7x590SEH is
electrically durable as it can withstand a forward operating
voltage of 33V over the full temperature range both under and
without ion beam radiation and a reverse voltage of -40V.
• Electrically screened to SMD# 5962-13215
Related Literature
The ISL71590SEH and ISL73590SEH are available in 2 Ld
flatpacks and die forms. All material applies to both parts
except for TID assurance test levels.
For a full list of related documents, visit our website
• ISL71590SEH and ISL73590SEH product pages
Applications
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
HIGH DOSE RATE (HDR) LOW DOSE RATE (LDR)
• RF power amplifier bias compensation
• LCD bias compensation
PART
NUMBER
ASSURANCE TEST
LEVEL (krad(Si))
ASSURANCE TEST
LEVEL (krad(Si))
• Laser diode bias compensation
• Sensor bias and linearization
• Data acquisition systems
ISL71590SEH
ISL73590SEH
300
N/A
50
50
+4V to +33V (V+ TO V-)
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
+
T
HDR
V
= 1mV/K
-
OUT
1kΩ
0.1%
ISL7x590SEH
LDR
-1.2
0
25
50
100 125 150 200 250 300
TOTAL DOSE (krad(Si))
FIGURE 1. TYPICAL APPLICATION
FIGURE 2. I
SHIFT vs LOW/HIGH DOSE RATE RADIATION
OUT
FN8376 Rev.3.00
Sep 14, 2018
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