Features
- Electrically screened to DLA SMD 5962-18217
- Wide operating voltage range: 3V to 40V
- High initial accuracy (+V = 20V at +25°C): ±0.34%
- High output impedance: 189MΩ (typical)
- Completely floating: No ground connection
- Radiation acceptance testing
- High dose rate (50-300rad(Si)/s): 100krad(Si)
- 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
Description
The ISL70591SEH is a radiation hardened precision 100µA current source IC. The device has 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 device is immune to single-event latch-up. The high output impedance of the device makes it insensitive to voltage drops across long lines. It 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 allowing 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 spacecraft. The device is available in a 4 Ld ceramic flatpack and die forms. The temperature range is -55°C to +125°C.
Parameters
| Attributes | Value |
|---|---|
| Rating | Space |
| Accuracy | ±0.34% |
| Continuous Output Current (mA) | 0.1 |
| Output Impedance (MΩ) | 189 |
| Supply Voltage (min) (V) | 3 - 3 |
| Supply Voltage (max) (V) | 40 - 40 |
| Temp. Range (°C) | -40 to +125°C, -55 to +125°C |
| TID HDR (krad(Si)) | 100 |
| TID LDR (krad(Si)) | 75 |
| DSEE (MeV·cm2/mg) | 86 |
| Flow | RH Hermetic |
| Qualification Level | Class V, EM |
| Die Sale Availability? | Yes |
| PROTO Availability? | Yes |
Applications
- Sensor excitation
- Biasing network
- Low-voltage references
- Ramp generators
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