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new products
with tolerances of ± 0.5 %, ± 1 %, and ± 5 %; TCR of ±
100 ppm/K and ± 200 ppm/K; and an operating voltage
range from 50 V to 150 V. The resistors operate over a
temperature range of -55 °C to +155 °C and are RoHS-
compliant and halogen-free.
Intersil Announces Industry’s First Rad
Tolerant 36V Instrumentation Amplifier with
Integrated Differential ADC Driver
Intersil Corporation (NASDAQ: ISIL), a leading provider
of innovative power management and precision analog
solutions, today introduced the industry’s first radiation
tolerant 36V instrumentation amplifier (in-amp) featuring
an integrated differential analog-to-digital converter
(ADC) driver. The high performance ISL70617SEH
differential input, rail-to-rail output in-amp delivers the
industry’s highest signal processing performance for
low-level sensor telemetry data critical to communication
satellites. Its high integration and best-in-class
performance reduces system size, weight and power
(SWAP) costs, and accelerates time to market.
The ISL70617SEH enables higher common-mode
rejection ratio (CMRR) and power supply rejection
ratio (PSRR) than the competition, at all gain settings.
Designers can easily program the in-amp’s gain from
0.1 to 10,000 using two external resistors. The device
is wafer-by-wafer guaranteed to 75krad (Si) with a
low dose rate exposure of 10mrad/sec, which more
closely resembles the space environment than the high
dose rate testing used with competitive devices. The
ISL70617SEH leverages Intersil’s proprietary silicon on
insulator process to provide single event latch-up (SEL)
and single event burnout (SEB) robustness of 60MeV in
heavy ion environments. And its single event transient
(SET) performance of <10usec eliminates the need for
extra filtering.
The ISL70517SEH joins the ISL70617SEH, and offers
similar features but implements a differential input
and rail-to-rail single-ended output. Both in-amps
allow designers to power the input/output stages from
different supplies using individual power supply pins.
Designers are able to take the input signals riding on
a high common-mode voltage and level shift them to a
low voltage device. For example, Intersil’s in-amps can
protect downstream ICs from high voltage signals by
tying the amplifier’s rail-to-rail output to an ADC’s low
voltage power supply. This also preserves the ADC
maximum input dynamic range and eliminates ADC
input overdrive.
“The ISL70617SEH is the space industry’s first true
differential-ended ADC driver,” said Philip Chesley,
senior vice president of Precision Products at Intersil.
“This extends our portfolio of rad hard products
exceeding the mission assurance needs of military and
commercial communication satellites.”
Key Features and Specifications of ISL70617SEH and
ISL70517SEH
Low input offset of 30µV, and low input bias current of
0.2nA
Excellent CMRR and PSRR of 120dB typical for
attenuating, gaining and filtering sensor signals to
improve signal quality
Wide operating range from ±4V to ±18V covers the
majority of analog supply rails
Closed loop -3dB BW 0.3MHz (AV = 1k) to 5.5MHz (A
= 0.1)
Extended operating temperature range of -55°C to
+125°C
Electrically screened to DLA SMD# 5962-15246
Acceptance tested to a higher dose level of 75krad(Si),
wafer-by-wafer
Industry’s lowest dose rate (0.01rad(Si)/s) radiation
tolerance of 75krad(Si)
SEB LETTH (VS = ±18V) immune up to 60MeV•cm2/mg
The ISL70617SEH and ISL70517SEH can be combined
with the ISL71830SEH 16-channel and ISL71831SEH
32-channel 5V multiplexers, ISL71590SEH temperature
sensor,ISL71090SEH25
voltage
reference,
ISL75052SEH 1.5A LDO regulator, ISL75051SEH 3A
LDO regulator, and op amps such as the ISL70444SEH,
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