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PDF ISL71091SEH40 Data sheet ( Hoja de datos )
| Número de pieza | ISL71091SEH40 | |
| Descripción | 4.096V Radiation Hardened Ultra Low Noise / Precision Voltage Reference | |
| Fabricantes | Intersil | |
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DATASHEET
4.096V Radiation Hardened Ultra Low Noise, Precision
Voltage Reference
ISL71091SEH40
The ISL71091SEH40 is an ultra low noise, high DC accuracy
precision voltage reference with a wide input voltage range
from 6.0V to 30V. It uses Intersil’s advanced bipolar technology
to achieve 6.2µVP-P 0.1Hz to 10Hz noise with an initial voltage
accuracy of 0.05%.
The ISL71091SEH40 offers a 4.096V 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 ISL71091SEH40 is ideal for high-end instrumentation,
data acquisition and processing applications requiring high DC
precision where low noise performance is critical.
Applications
• Precision voltage sources for data acquisition system for
space applications
• Strain and pressure gauge for space applications
• Radiation hardened PWM requiring precision outputs
Related Literature
• AN1906, “ISL71091SEHxxEV1Z User’s Guide”
• AN1938, “Single Event Effects (SEE) Testing of the
ISL71091SEHxx Precision Voltage References Family”
• AN1939, “Total Dose Testing of the ISL71091SEHxx
Precision Voltage Reference”
Features
• Reference output voltage . . . . . . . . . . . . . . . .4.096V ±0.05%
• Accuracy over temperature . . . . . . . . . . . . . . . . . . . . . ±0.15%
• Accuracy over radiation . . . . . . . . . . . . . . . . . . . . . . . . ±0.25%
• Output voltage noise . . . . . .6.2µVP-P typical (0.1Hz to 10Hz)
• Supply current . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300µA (Typ)
• VOS temperature coefficient . . . . . . . . . . 6ppm/°C maximum
• Output current capability . . . . . . . . . . . . . . . . . . 10mA /-5mA
• Line regulation . . . . . . . . . . . . . . . . . . . . . . 5ppm/V maximum
• Load regulation (sourcing) . . . . . . . . . 20ppm/mA maximum
• Operating temperature range. . . . . . . . . . . .-55°C to +125°C
• Radiation environment
- 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
*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.
• Electrically screened to SMD 5962-14208
VIN
0.1µF
ISL71091SEH40
1
DNC
8
DNC
2
VIN
7
DNC
3 COMP VOUT 6
1nF 4
GND
5
TRIM
VDD
VEE
NOTE: Select C to minimize
settling time.
REFIN DACOUT
VDD
D12
VEE
D0
BIPOFF
GND
HS-565BRH
VREF
1µF
C
1.1k
FIGURE 1. ISL71091SEH40 TYPICAL APPLICATION DIAGRAM
4.101
4.100
4.099
4.098
4.097
4.096
4.095
4.094
4.093
4.092
4.091
-65
UNIT 2
UNIT 3
UNIT 5 UNIT 4
UNIT 1
-45 -25
-5 15 35 55 75
TEMPERATURE (°C)
95 115 135
FIGURE 2. VOUT vs TEMPERATURE
March 17, 2016
FN8634.2
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2014, 2016. All Rights Reserved
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.
1 page  
ISL71091SEH40
Absolute Maximum Ratings
Maximum Voltage
VIN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +40V
VIN to GND at an LET = 86MeV•cm2/mg . . . . . . . . . . . . . . -0.5V to +36V
VOUT to GND (10s). . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.5V to VOUT + 0.5V
Voltage on any Pin to Ground . . . . . . . . . . . . . . . . . . . -0.5V to +VOUT + 0.5V
Voltage on DNC Pins. . . . . . . . . . . . . . . No connections permitted to these pins
ESD Ratings (MIL STD 883 Method)
Human Body Model (Tested per MIL-PRF-883 3015.7). . . . . . . . . . . 2kV
Machine Model (Tested per JESD22-A115-A) . . . . . . . . . . . . . . . . . . 200V
Charged Device Model (Tested per JESD22-C101D) . . . . . . . . . . . 750V
Thermal Information
Thermal Resistance (Typical)
JA (°C/W) JC (°C/W)
8 Ld Flatpack Package (Notes 4, 5). . . . . .
135
11
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Maximum Junction Temperature (TJMAX) . . . . . . . . . . . . . . . . . . . . .+150°C
Recommended Operating Conditions
Input Voltage Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +6.0V to +30V
Ambient Operating Temperature Range . . . . . . . . . . . . . -55°C to +125°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
5. For JC, the “case temp” location is the center of the ceramic on the package underside.
Electrical Specifications for Flatpack VIN = 8V, IOUT = 0mA, CL = 1µF and CCOMP = 0.001µF unless otherwise specified. Boldface
limits apply after radiation at +25°C and across the operating temperature range, -55°C to +125°C without radiation, unless otherwise specified.
PARAMETER
DESCRIPTION
TEST CONDITIONS
MIN MAX
(Note 6)
TYP
(Note 6)
UNIT
VOUT
VOA
Output Voltage
VOUT Accuracy at TA = +25°C
VOUT = 4.096V (Note 9)
VOUT Accuracy at TA = -55°C to +125°C VOUT = 4.096V (Note 9)
VOUT Accuracy at TA = +25°C, Post
Radiation
VOUT = 4.096V (Note 9)
-0.05
-0.15
-0.25
4.096
+0.05
+0.15
+0.25
V
%
%
%
TC VOUT
Output Voltage Temperature
Coefficient (Note 7)
6 ppm/°C
VIN
IIN
VOUT /VIN
VOUT /IOUT
Input Voltage Range
Supply Current
Line Regulation
Load Regulation
VD
ISC+
ISC-
tR
PSRR
Dropout Voltage (Note 8)
Short-Circuit Current
Short-Circuit Current
Turn-On Settling Time
Ripple Rejection
VOUT = 4.096V
VIN = 6.0V to 30V, VOUT = 4.096V
Sourcing: 0mA ≤ IOUT ≤ 10mA
Sinking: -5mA ≤ IOUT ≤ 0mA
IOUT = 10mA
TA = +25°C, VOUT tied to GND
TA = +25°C, VOUT tied to VIN
90% of final value, CL = 1.0µF,
CC = 1000pF
f = 120Hz
6.0
30.0
V
0.3 0.5 mA
0.3 5.0 ppm/V
11 20 ppm/mA
25 50 ppm/mA
1.1 1.6
V
55 mA
-61 mA
336 µs
82 dB
eNVP-P
eNVRMS
eN
VOUT/t
Output Voltage Noise
Broadband Voltage Noise
Noise Density
Long Term Stability
0.1Hz ≤ f ≤10Hz, VOUT = 4.096V
10Hz ≤ f ≤1kHz, VOUT = 4.096V
f = 1kHz, VOUT = 4.096V
TA = +25°C, 1000 hours
6.2 µVP-P
6.6 µVRMS
188 nV/√Hz
20 ppm
Submit Document Feedback
5
FN8634.2
March 17, 2016
5 Page 
ISL71091SEH40
Device Operation
Bandgap Precision References
The ISL71091SEH40 uses a bandgap architecture and special
trimming circuitry to produce a temperature compensated,
precision voltage reference with high input voltage capability and
moderate output current drive.
Applications Information
Board Mounting Considerations
For applications requiring the highest accuracy, board mounting
location should be reviewed. The device uses a ceramic flatpack
package. Generally, mild stresses to the die when the Printed
Circuit (PC) board is heated and cooled, can slightly change the
shape. Because of these die stresses, placing the device in areas
subject to slight twisting can cause degradation of reference
voltage accuracy. It is normally best to place the device near the
edge of a board, or on the shortest side, because the axis of
bending is most limited in that location. Mounting the device in a
cutout also minimizes flex. Obviously, mounting the device on
flexprint or extremely thin PC material will likewise cause loss of
reference accuracy.
Board Assembly Considerations
Some PC board assembly precautions are necessary. Normal
output voltage shifts of 100µV to 500µV can be expected with
Pb-free reflow profiles or wave solder on multilayer FR4 PC
boards. Precautions should be taken to avoid excessive heat or
extended exposure to high reflow or wave solder temperatures.
Noise Performance and Reduction
The output noise voltage in a 0.1Hz to 10Hz bandwidth is typically
6.2µVP-P (VOUT = 4.096V). The noise measurement is made with a
bandpass filter. The filter is made of a 1-pole high-pass filter, with a
corner frequency at 0.1Hz, and a 2-pole low-pass filter, with a
corner frequency (3dB) at 9.9Hz, to create a filter with a 9.9Hz
bandwidth. Noise in the 10Hz to 1kHz bandwidth is approximately
6.6µVRMS (VOUT = 4.096V), with 0.1µF capacitance on the output.
This noise measurement is made with a 2 decade bandpass filter.
The filter is made of a 1-pole high-pass filter with a corner
frequency at 10Hz of the center frequency, and 1-pole low-pass
filter with a corner frequency at 1kHz. Load capacitance up to
10µF can be added but will result in only marginal improvements
in output noise and transient response.
Turn-On Time
Normal turn-on time is typically 336µs, as shown in Figure 20 on
page 9. The circuit designer must take this into account when
looking at power-up delays or sequencing.
Temperature Coefficient
The limits stated for temperature coefficient (Tempco) are governed
by the method of measurement. The overwhelming standard for
specifying the temperature drift of a reference is to measure the
reference voltage at two temperatures. Take the total variation,
(VHIGH – VLOW), and divide by the temperature extremes of
measurement (THIGH – TLOW). The result is divided by the nominal
reference voltage (at T = +25°C) and multiplied by 106 to yield
ppm/°C. This is the “Box” method for specifying temperature
coefficient.
Output Voltage Adjustment
The output voltage can be adjusted above and below the
factory-calibrated value via the trim terminal. The trim terminal is
the negative feedback divider point of the output op amp. The
voltage at the trim pin is set at approximately 1.216V by the
internal bandgap and amplifier circuitry of the voltage reference.
The suggested method to adjust the output is to connect a very
high value external resistor directly to the trim terminal and
connect the other end to the wiper of a potentiometer that has a
much lower total resistance and whose outer terminals connect
to VOUT and ground. It is important to minimize the capacitance
on the trim terminal to preserve output amplifier stability. It is
also best to connect the series resistor directly to the trim
terminal, to minimize that capacitance and also to minimize
noise injection. Small trim adjustments, such as ±0.25%, will not
disturb the factory-set temperature coefficient of the reference,
but trimming by large amounts can.
Output Stage
The output stage of the device has a push-pull configuration with
a high side PNP and a low side NPN. This helps the device to act
as a source and sink. The device can source 10mA and sink
5mA.
Use of COMP Capacitor
The reference can be compensated for the COUT capacitors used
by adding a capacitor from the COMP pin to GND. See Table 2 for
recommended values of the COMP capacitor.
COUT
(µF)
TABLE 2.
CCOMP
(nF)
0.1 1
11
10 10
Data from SEE testing suggests the best option to use is 1µF for
COUT and 1nF for CCOMP. Refer to the SEE report (AN1938) for
more details.
DNC Pins
These pins are for trimming purpose and for factory use only. Do
not connect these to the circuit in any way. It will adversely effect
the performance of the reference.
Simulation Model
A SPICE simulation model is available under the Documents tab
of the ISL71091SEH40 landing page on the Intersil website.
Figures 24 through 29 show a comparison of the characterized
part performance and the simulated part performance.
Submit Document Feedback 11
FN8634.2
March 17, 2016
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ISL71091SEH40.PDF ] | |
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