DATASHEET
2.048V Radiation Hardened Ultra Low Noise, Precision
Voltage Reference
ISL71091SEH20
Features
The ISL71091SEH20 is an ultra low noise, high DC accuracy
precision voltage reference with a wide input voltage range
from 4.2V to 30V. It uses Intersil’s advanced bipolar technology
to achieve 3.8µVP-P 0.1Hz to 10Hz noise with an initial voltage
accuracy of 0.05%.
• Reference output voltage . . . . . . . . . . . . . . . .2.048V ±0.05%
• Accuracy over temperature . . . . . . . . . . . . . . . . . . . . . ±0.15%
• Accuracy over radiation . . . . . . . . . . . . . . . . . . . . . . . . ±0.25%
• Output voltage noise . . . . . .3.8µVP-P typical (0.1Hz to 10Hz)
• Supply current . . . . . . . . . . . . . . . . . . . . . . . . . 300µA (typical)
• VOS temperature coefficient . . . . . . . . . . 6ppm/°C maximum
• Output current capability . . . . . . . . . . . . . . . . . . . 10mA/-5mA
• Line regulation . . . . . . . . . . . . . . . . . . . . . . 5ppm/V maximum
• Load regulation (Sourcing) . . . . . . . . . 40ppm/mA maximum
• Operating temperature range. . . . . . . . . . . .-55°C to +125°C
The ISL71091SEH20 offers a 2.048V output voltage option
with 6ppm/°C temperature coefficient and also provides
excellent line and load regulation. The device is offered in an
8 Ld flatpack package.
The ISL71091SEH20 is ideal for high-end instrumentation,
data acquisition and processing applications requiring high DC
precision where low noise performance is critical.
• Radiation environment
Applications
- High dose rate (50 to 300rad(Si)/s). . . . . . . . . 100krad(Si)
- Low dose rate (0.01rad(Si)/s) . . . . . . . . . . . . .100krad(Si)*
- SEL/SEB free (VCC = 36V) . . . . . . . . . . . . 86MeV•cm2/mg
• Precision voltage sources for data acquisition system for
space application
• Strain and pressure gauge for space applications
• Radiation hardened PWM requiring precision outputs
*Product capability established by initial characterization. The
“EH” version is acceptance tested on a wafer-by-wafer basis to
50krad(Si) at low dose rate.
Related Literature
• AN1906, “ISL71091SEHxxEV1Z User’s Guide”
• Electrically screened to SMD 5962-14208
• AN1938, “Single Event Effects (SEE) Testing of the
ISL71091SEHxx Precision Voltage References Family”
• AN1939, “Total Dose Testing of the ISL71091SEHxx
Precision Voltage Reference”
ISL71091SEH20
2.051
2.050
1
2
8
7
DNC
VIN
DNC
DNC
VIN
VREF
0.1µF
3
4
6
5
COMP
GND
VOUT
TRIM
2.049
2.048
2.047
2.046
2.045
UNIT 1
1nF
1µF
UNIT 2
C
UNIT 3
REFIN DACOUT
UNIT 4
UNIT 5
D12
D0
VDD
VEE
VDD
VEE
1.1k
BIPOFF
GND
NOTE: Select C to minimize
settling time.
-65 -45 -25 -5
15
35
55
75
95
115 135
HS-565BRH
TEMPERATURE (°C)
FIGURE 2. VOUT vs TEMPERATURE
FIGURE 1. ISL71091SEH20 TYPICAL APPLICATION DIAGRAM
March 17, 2016
FN8632.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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