ISL73591SEH

Radiation Hardened 100µA and 1mA Precision Current Sources

OVERVIEW

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.

KEY FEATURES

  • Electrically screened to DLA SMD5962-18217
  • 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 LETTH, +V = 35V: 86MeV•cm2/mg
    - SET duration (time recovery) ≤125µs

PARAMETRICS

Parameters
ISL73591SEH
Basic Information
Production Status
Mass Production
Class
V
DLA SMD
5962-18217
Low Dose Rate (ELDRS) krad (Si)
75
SEL (MeV/mg/cm2)
86
SMD URL
Qualification Level
QML Class V (space)

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