ISL70517SEH Datasheet, PDF (1/27 Pages) Intersil Corporation – Precision test and measurement

DATASHEET
36V Radiation Tolerant Precision Instrumentation
Amplifier with Rail-to-Rail Output ADC Driver
ISL70517SEH
The ISL70517SEH is a high performance, differential input,
single-ended 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 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 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.
The gain of the ISL70517SEH can be programmed from 0.1 to
10,000 via two external resistors, R_IN and R_FB. The gain
accuracy is determined by the matching of R_IN and R_FB. 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.
The ISL70517SEH is offered in a 24 Ld ceramic flatpack
package with an operating temperature range of -55°C to
+125°C.
Features
• Rail-to-rail single-ended 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 (A_V = 1k) to 5.5MHz (A_V = 0.1)
• Operating temperature range. . . . . . . . . . . .-55°C to +125°C
• Electrically screened to DLA SMD# 5962-15246
• Acceptance tested to 75krad(Si) (LDR) wafer-by-wafer
• Radiation tolerance
- Low dose rate (0.01rad(Si)/s) . . . . . . . . . . . . . . 75krad(Si)
- SEB LET_TH (V_S = ±18V). . . . . . . . . . . . . . . 60MeV•cm²/mg
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
- ISL70517SEH product page
SIGNAL WITH
HIGH VCM
R_IN
R_FB
HIGH V_IN
SIGNAL
R_IN
R_FB
+18V
IN+
VCC
+RIN
GAIN = 10
VCO
-RIN
+VFB
ISL70517SEH
VOUT
+RFB
VREF
-RFBVEE ^VEO
IN-
-18V
+18V
5V
IN+
+RINVCC
GAIN = 0.1
VCO
-RIN
+VFB
ISL70517SEH _VOUT
+RFB
VREF
VEO
-RFBVEE
IN-
CH 1
CH 16
18V
ISL71090SEH25
VCC
GND
5V
VCC
IN
VREF
RHADC
GND
ISL71090SEH25
FIGURE 1. COMPLETE SPACE GRADE ANALOG SIGNAL CHAIN
December 15, 2016
1
FN8699.4
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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