DATASHEET
36V Radiation Tolerant Precision Instrumentation Amp
with Rail-to-Rail Output Differential ADC Driver
ISL70617SEH
Features
The ISL70617SEH is a high performance, differential input,
differential output instrumentation amplifier designed for
precision analog-to-digital applications. It can operate over a
supply range of 8V (±4V) to 36V (±18V) and features a
differential input voltage range up to ±30V. The output stage
has rail-to-rail output drive capability optimized for differential
ADC driver applications. The output stage is powered by
separate supplies. This feature enables the output to be driven
by the same low voltage supplies powering the ADC, thereby
providing protection from high voltage signals and the low
voltage digital circuits. Its versatility makes it suitable for a
variety of general purpose applications. Additional features not
found in other instrumentation amplifiers enable high levels of
DC precision and excellent AC performance.
• Rail-to-rail differential output ADC driver
• Low input offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30µV
• Input bias current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.2nA
• Excellent CMRR and PSRR . . . . . . . . . . . . . . . . . . . . . . . 120dB
• Wide operating voltage range . . . . . . . . . . . . . . . ±4V to ±18V
• Closed loop -3dB BW 0.3MHz (AV = 1k) to 5.5MHz (AV = 0.1)
• Operating temperature range. . . . . . . . . . . .-55°C to +125°C
• Acceptance tested to 75krad(Si) (LDR) wafer-by-wafer
• Radiation tolerance
- Low dose rate (0.01rad(Si)/s) . . . . . . . . . . . . . . 75krad(Si)
- SEB LETTH (VS = ±18V). . . . . . . . . . . . . . . 60MeV•cm2/mg
The gain of the ISL70617SEH can be programmed from 0.1 to
10,000 via two external resistors, RIN and RFB. The gain
accuracy is determined by the matching of RIN and RFB. The
gain resistors have Kelvin sensing, which removes gain error
due to PC trace resistance. The input and output stages have
individual power supply pins, which enable input signals riding
on a high common-mode voltage to be level shifted to a low
voltage device, such as an A/D converter. The rail-to-rail output
stage can be powered from the same supplies as the ADC,
which preserves the ADC maximum input dynamic range and
eliminates ADC input overdrive.
Applications
• ADC driver
• Precision test and measurement
• High voltage process control
• Signal conditioning for remote powered sensors
• Satellite communication
Related Literature
• For a full list of related documents, visit our website
- ISL70617SEH product page
The ISL70617SEH is offered in a 24 Ld ceramic flatpack
package with an operating temperature range of -55°C to
+125°C.
SIGNAL WITH
+18V
HIGH VCM
IN+
VCC
+RIN
GAIN = 10
V
CC
VCO
5V
Ch 1
R
+VFB
IN
-RIN
ISL70617SEH
+RFB
+VOUT
-VOUT
-VFB
Ch 16
V
R
CMO
FB
-RFB
VEO
VEE
V
IN-
GND
CC
-18V
+18V
HIGH V
IN
IN
RHADC
5V
SIGNAL
V
REF
IN+
GAIN = 0.1
GND
VCC
VCO
V
+RIN
CC
R
IN
Ch 1
+VFB
-RIN
+VOUT
ISL70617SEH
-VOUT
+RFB
-VFB
R
V
Ch 16
FB
CMO
VEO
-RFB
VEE
ISL71090SEH25
IN-
GND
-18V
ISL71090SEH25
FIGURE 1. COMPLETE SPACE GRADE ANALOG SIGNAL CHAIN
December 16, 2016
FN8697.4
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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