Intersil ISL21080 300na nanopower voltage reference Datasheet

ISL21080
Features
The ISL21080 analog voltage references feature low
supply voltage operation at ultra-low 310nA typ, 1.5µA
max operating current. Additionally, the ISL21080 family
features guaranteed initial accuracy as low as ±0.2%
and 50ppm/°C temperature coefficient.
• Reference Output Voltage . . . . . 0.900V, 1.024V, 1.250V,
1.500V, 2.048V, 2.500V, 3.000V, 3.300V, 4.096V, 5.000V
• Initial Accuracy:
-
These references are ideal for general purpose portable
applications to extend battery life at lower cost. The
ISL21080 is provided in the industry standard 3 Ld
SOT-23 pinout.
The ISL21080 output voltages can be used as precision
voltage sources for voltage monitors, control loops,
standby voltages for low power states for DSP, FPGA,
Datapath Controllers, microcontrollers and other core
voltages: 0.9V, 1.024V, 1.25V, 1.5V, 2.048V, 2.5V, 3.0V,
3.3V, 4.096V and 5.0V.
Special Note: Post-assembly x-ray inspection may lead to
permanent changes in device output voltage and should be
minimized or avoided. For further information, please see
“Applications Information” on page 14 and AN1533, “X-Ray
Effects on Intersil FGA References”.
ISL21080-09 and -10 . . . . . . . . . . . . . . . . . . ±0.7%
ISL21080-12 . . . . . . . . . . . . . . . . . . . . . . . . ±0.6%
ISL21080-15. . . . . . . . . . . . . . . . . . . . . . . . . ±0.5%
ISL21080-20 and -25 . . . . . . . . . . . . . . . . . . ±0.3%
ISL21080-30, -33, -41, and -50 . . . . . . . . ±0.2%
• Input Voltage Range:
- ISL21080-09. . . . . . . . . . . . . . . . . . . . . 2.0V to 5.5V
- ISL21080-10, -12, -15, -20 and -25 . . . . .2.7V to 5.5V
- ISL21080-30. . . . . . . . . . . . . . . . . . . . . 3.2V to 5.5V
- ISL21080-33. . . . . . . . . . . . . . . . . . . . . 3.5V to 5.5V
- ISL21080-41. . . . . . . . . . . . . . . . . . . . . 4.5V to 8.0V
- ISL21080-50. . . . . . . . . . . . . . . . . . 5.5V to 8.0V
• Output Voltage Noise . . . . 30µVP-P (0.1Hz to 10Hz)
• Supply Current. . . . . . . . . . . . . . . . . . 1.5µA (Max)
• Tempco . . . . . . . . . . . . . . . . . . . . . . . . 50ppm/°C
Applications*(see page 20)
• Output Current Capability . . . . . . . . . . . . . . ±7mA
• Energy Harvesting Applications
• Wireless Sensor Network Applications
• Low Power Voltage Sources for Controllers, FPGA,
ASICs or Logic Devices
• Battery Management/Monitoring
• Low Power Standby Voltages
• Portable Instrumentation
• Consumer/Medical Electronics
• Wearable Electronics
• Lower Cost Industrial and Instrumentation
• Power Regulation Circuits
• Control Loops and Compensation Networks
• LED/Diode Supply
• Operating Temperature Range . . . . -40°C to +85°C
• Package . . . . . . . . . . . . . . . . . . . . . . 3 Ld SOT-23
• Pb-Free (RoHS compliant)
Related Literature*(see page 20)
• See AN1494, “Reflow and PC Board Assembly Effects
on Intersil FGA References”
• See AN1533, “X-Ray Effects on Intersil FGA
References”
500
UNIT 1
400
IN (nA)
UNIT 2
300
UNIT 3
200
100
0
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
VIN (V)
FIGURE 1. IIN vs VIN, 3 UNITS
May 25, 2010
FN6934.4
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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FGA is a trademark of Intersil Corporation. Copyright Intersil Americas Inc. 2009, 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL21080
300nA NanoPower Voltage References
ISL21080
Pin Configuration
Pin Descriptions
ISL21080
(3 LD SOT-23)
TOP VIEW
PIN NUMBER
PIN NAME
1
VIN
Input Voltage Connection.
2
VOUT
Voltage Reference Output
3
GND
Ground Connection
VIN 1
3 GND
DESCRIPTION
VOUT 2
Ordering Information
PART NUMBER
(Notes 1, 2)
PART
MARKING
VOUT OPTION
(V)
GRADE
(%)
TEMP. RANGE
(°C)
PACKAGE
Tape & Reel
(Pb-Free)
PKG.
DWG. #
ISL21080DIH309Z-TK
BCLA
0.9
±0.7
-40 to +85
3 Ld SOT-23
P3.064
ISL21080DIH310Z-TK
BCMA
1.024
±0.7
-40 to +85
3 Ld SOT-23
P3.064
ISL21080DIH312Z-TK
BCNA
1.25
±0.6
-40 to +85
3 Ld SOT-23
P3.064
ISL21080CIH315Z-TK
BCDA
1.5
±0.5
-40 to +85
3 Ld SOT-23
P3.064
ISL21080CIH320Z-TK
BCPA
2.048
±0.3
-40 to +85
3 Ld SOT-23
P3.064
ISL21080CIH325Z-TK
BCRA
2.5
±0.3
-40 to +85
3 Ld SOT-23
P3.064
ISL21080CIH330Z-TK
BCSA
3.0
±0.2
-40 to +85
3 Ld SOT-23
P3.064
ISL21080CIH333Z-TK
BCTA
3.3
±0.2
-40 to +85
3 Ld SOT-23
P3.064
ISL21080CIH341Z-TK
BCVA
4.096
±0.2
-40 to +85
3 Ld SOT-23
P3.064
ISL21080CIH350Z-TK
BCWA
5.0
±0.2
-40 to +85
3 Ld SOT-23
P3.064
NOTES:
1. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both
SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL21080. For more information on MSL please
see techbrief TB363.
2
FN6934.4
May 25, 2010
ISL21080
Absolute Maximum Ratings
Thermal Information
Max Voltage
VIN to GND . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +6.5V
VIN to GND (ISL21080-41 and 50 only) . . . -0.5V to +10V
VOUT to GND (10s) . . . . . . . . . . . . . . -0.5V to VOUT +1V
VOUT to GND (10s)
ISL21080-41 and 50 only . . . . . . . . . . -0.5V to +5.1V
ESD Ratings
Human Body Model (Tested to JESD22-A114) . . . . . . . 5kV
Machine Model (Tested to JESD22-A115) . . . . . . . . . 500V
Charged Device Model (Tested to JESD22-C101) . . . . . 2kV
Latch Up (Tested per JESD-78B; Class 2, Level A) . . . 100mA
Thermal Resistance (Typical, Notes 5, 6) θJA (°C/W) θJC (°C/W)
3 Lead SOT-23 . . . . . . . . . . . . . . .
275
110
Maximum Junction Temperature . . . . . . . . . . . . . . . +107°C
Continuous Power Dissipation (TA = +85°C). . . . . . . . 99mW
Storage Temperature Range . . . . . . . . . . . -65°C to +150°C
Pb-Free Reflow Profile (Note 7) . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
Temperature. . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
Environmental Operating Conditions
X-Ray Exposure (Note 4). . . . . . . . . . . . . . . . . . . .10mRem
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. Measured with no filtering, distance of 10” from source, intensity set to 55kV and 70mA current, 30s duration. Other exposure
levels should be analyzed for Output Voltage drift effects. See “Applications Information” on page 14.
5. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief
TB379 for details.
6. For θJC, the “case temp” location is taken at the package top center.
7. Post-reflow drift for the ISL21080 devices will range from 100µV to 1.0mV based on experimental results with devices on FR4
double sided boards. The design engineer must take this into account when considering the reference voltage after assembly.
8. Post-assembly x-ray inspection may also lead to permanent changes in device output voltage and should be minimized or
avoided. Initial accuracy can change 10mV or more under extreme radiation. Most inspection equipment will not affect the
FGA reference voltage, but if x-ray inspection is required, it is advisable to monitor the reference output voltage to verify
excessive shift has not occurred.
Electrical Specifications
PARAMETER
(ISL21080-09, VOUT = 0.9V) VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to
+85°C.
DESCRIPTION
CONDITIONS
VOUT
Output Voltage
VOA
VOUT Accuracy @ TA = +25°C (Notes 7, 8)
TC VOUT
Output Voltage Temperature Coefficient
(Note 9)
VIN
Input Voltage Range
IIN
Supply Current
ΔVOUT /ΔVIN
Line Regulation
2V < VIN < 5.5V
ΔVOUT/ΔIOUT
Load Regulation
MIN
(Note 12)
TYP
MAX
(Note 12)
0.9
-0.7
UNIT
V
+0.7
%
50
ppm/°C
5.5
V
0.35
1.5
µA
30
350
µV/V
Sourcing: 0mA ≤ IOUT ≤ 10mA
6
100
µV/mA
Sinking: -10mA ≤ IOUT ≤ 0mA
23
350
µV/mA
30
mA
1
ms
2.0
ISC
Short Circuit Current
TA = +25°C, VOUT tied to GND
tR
Turn-on Settling Time
VOUT = ±0.1% with no load
Ripple Rejection
f = 120Hz
-40
dB
eN
Output Voltage Noise
0.1Hz ≤ f ≤ 10Hz
40
µVP-P
VN
Broadband Voltage Noise
10Hz ≤ f ≤ 1kHz
10
µVRMS
Noise Density
f = 1kHz
1.1
µV/√Hz
ΔVOUT/ΔTA
Thermal Hysteresis (Note 10)
ΔTA = +125°C
100
ppm
ΔVOUT/Δt
Long Term Stability (Note 11)
TA = +25°C
60
ppm
3
FN6934.4
May 25, 2010
ISL21080
Electrical Specifications
PARAMETER
(ISL21080-10, VOUT = 1.024V) VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range,
-40°C to +85°C.
DESCRIPTION
VOUT
Output Voltage
VOA
VOUT Accuracy @ TA = +25°C (Notes 7, 8)
TC VOUT
Output Voltage Temperature Coefficient
(Note 9)
VIN
Input Voltage Range
IIN
Supply Current
ΔVOUT /ΔVIN
Line Regulation
ΔVOUT/ΔIOUT
Load Regulation
CONDITIONS
MIN
(Note 12)
TYP
MAX
(Note 12)
1.024
-0.7
UNIT
V
+0.7
%
50
ppm/°C
5.5
V
0.31
1.5
µA
2.7V < VIN < 5.5V
80
350
µV/V
Sourcing: 0mA ≤ IOUT ≤ 7mA
25
100
µV/mA
Sinking: -7mA ≤ IOUT ≤ 0mA
50
350
µV/mA
50
mA
4
ms
2.7
ISC
Short Circuit Current
TA = +25°C, VOUT tied to GND
tR
Turn-on Settling Time
VOUT = ±0.1% with no load
Ripple Rejection
f = 120Hz
-40
dB
eN
Output Voltage Noise
0.1Hz ≤ f ≤ 10Hz
30
µVP-P
VN
Broadband Voltage Noise
10Hz ≤ f ≤ 1kHz
52
µVRMS
Noise Density
f = 1kHz
2.2
µV/√Hz
ΔVOUT/ΔTA
Thermal Hysteresis (Note 10)
ΔTA = +165°C
100
ppm
ΔVOUT/Δt
Long Term Stability (Note 11)
TA = +25°C
50
ppm
Electrical Specifications
PARAMETER
(ISL21080-12, VOUT = 1.25V) VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to
+85°C.
DESCRIPTION
VOUT
Output Voltage
VOA
VOUT Accuracy @ TA = +25°C (Notes 7, 8)
TC VOUT
Output Voltage Temperature Coefficient
(Note 9)
VIN
Input Voltage Range
IIN
Supply Current
ΔVOUT /ΔVIN
Line Regulation
ΔVOUT/ΔIOUT
Load Regulation
CONDITIONS
MIN
(Note 12)
TYP
MAX
(Note 12)
1.25
-0.6
UNIT
V
+0.6
%
50
ppm/°C
5.5
V
0.31
1.5
µA
2.7V < VIN < 5.5V
80
350
µV/V
Sourcing: 0mA ≤ IOUT ≤ 7mA
25
100
µV/mA
Sinking: -7mA ≤ IOUT ≤ 0mA
50
350
µV/mA
50
mA
4
ms
2.7
ISC
Short Circuit Current
TA = +25°C, VOUT tied to GND
tR
Turn-on Settling Time
VOUT = ±0.1% with no load
Ripple Rejection
f = 120Hz
-40
dB
eN
Output Voltage Noise
0.1Hz ≤ f ≤ 10Hz
30
µVP-P
VN
Broadband Voltage Noise
10Hz ≤ f ≤ 1kHz
52
µVRMS
Noise Density
f = 1kHz
1.1
µV/√Hz
ΔVOUT/ΔTA
Thermal Hysteresis (Note 10)
ΔTA = +165°C
100
ppm
ΔVOUT/Δt
Long Term Stability (Note 11)
TA = +25°C
50
ppm
4
FN6934.4
May 25, 2010
ISL21080
Electrical Specifications
PARAMETER
(ISL21080-15, VOUT = 1.5V) VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to
+85°C.
DESCRIPTION
VOUT
Output Voltage
VOA
VOUT Accuracy @ TA = +25°C (Notes 7, 8)
TC VOUT
Output Voltage Temperature Coefficient
(Note 9)
VIN
Input Voltage Range
IIN
Supply Current
ΔVOUT /ΔVIN
Line Regulation
ΔVOUT/ΔIOUT
Load Regulation
CONDITIONS
MIN
(Note 12)
TYP
MAX
(Note 12)
1.5
-0.5
UNIT
V
+0.5
%
50
ppm/°C
5.5
V
0.31
1.5
µA
2.7V < VIN < 5.5V
80
350
µV/V
Sourcing: 0mA ≤ IOUT ≤ 7mA
10
100
µV/mA
Sinking: -7mA ≤ IOUT ≤ 0mA
50
350
µV/mA
50
mA
4
ms
2.7
ISC
Short Circuit Current
TA = +25°C, VOUT tied to GND
tR
Turn-on Settling Time
VOUT = ±0.1% with no load
Ripple Rejection
f = 120Hz
-40
dB
eN
Output Voltage Noise
0.1Hz ≤ f ≤ 10Hz
30
µVP-P
VN
Broadband Voltage Noise
10Hz ≤ f ≤ 1kHz
52
µVRMS
Noise Density
f = 1kHz
1.1
µV/√Hz
ΔVOUT/ΔTA
Thermal Hysteresis (Note 10)
ΔTA = +165°C
100
ppm
ΔVOUT/Δt
Long Term Stability (Note 11)
TA = +25°C
50
ppm
Electrical Specifications
PARAMETER
(ISL21080-20, VOUT = 2.048V) VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range,
-40°C to +85°C.
DESCRIPTION
VOUT
Output Voltage
VOA
VOUT Accuracy @ TA = +25°C (Notes 7, 8)
TC VOUT
Output Voltage Temperature Coefficient
(Note 9)
VIN
Input Voltage Range
IIN
Supply Current
ΔVOUT /ΔVIN
Line Regulation
ΔVOUT/ΔIOUT
Load Regulation
CONDITIONS
MIN
(Note 12)
TYP
MAX
(Note 12)
2.048
-0.3
UNIT
V
+0.3
%
50
ppm/°C
5.5
V
0.31
1.5
µA
2.7V < VIN < 5.5V
80
350
µV/V
Sourcing: 0mA ≤ IOUT ≤ 7mA
25
100
µV/mA
Sinking: -7mA ≤ IOUT ≤ 0mA
50
350
µV/mA
50
mA
4
ms
2.7
ISC
Short Circuit Current
TA = +25°C, VOUT tied to GND
tR
Turn-on Settling Time
VOUT = ±0.1% with no load
Ripple Rejection
f = 120Hz
-40
dB
eN
Output Voltage Noise
0.1Hz ≤ f ≤ 10Hz
30
µVP-P
VN
Broadband Voltage Noise
10Hz ≤ f ≤ 1kHz
52
µVRMS
Noise Density
f = 1kHz
1.1
µV/√Hz
ΔVOUT/ΔTA
Thermal Hysteresis (Note 10)
ΔTA = +165°C
100
ppm
ΔVOUT/Δt
Long Term Stability (Note 11)
TA = +25°C
50
ppm
5
FN6934.4
May 25, 2010
ISL21080
Electrical Specifications
PARAMETER
(ISL21080-25, VOUT = 2.5V) VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to
+85°C.
DESCRIPTION
VOUT
Output Voltage
VOA
VOUT Accuracy @ TA = +25°C (Notes 7, 8)
TC VOUT
Output Voltage Temperature Coefficient
(Note 9)
VIN
Input Voltage Range
IIN
Supply Current
ΔVOUT /ΔVIN
Line Regulation
ΔVOUT/ΔIOUT
Load Regulation
CONDITIONS
MIN
(Note 12)
TYP
MAX
(Note 12)
2.5
-0.3
UNIT
V
+0.3
%
50
ppm/°C
5.5
V
0.31
1.5
µA
2.7V < VIN < 5.5V
80
350
µV/V
Sourcing: 0mA ≤ IOUT ≤ 7mA
25
100
µV/mA
Sinking: -7mA ≤ IOUT ≤ 0mA
50
350
µV/mA
50
mA
4
ms
2.7
ISC
Short Circuit Current
TA = +25°C, VOUT tied to GND
tR
Turn-on Settling Time
VOUT = ±0.1% with no load
Ripple Rejection
f = 120Hz
-40
dB
eN
Output Voltage Noise
0.1Hz ≤ f ≤ 10Hz
30
µVP-P
VN
Broadband Voltage Noise
10Hz ≤ f ≤ 1kHz
52
µVRMS
Noise Density
f = 1kHz
1.1
µV/√Hz
ΔVOUT/ΔTA
Thermal Hysteresis (Note 10)
ΔTA = +165°C
100
ppm
ΔVOUT/Δt
Long Term Stability (Note 11)
TA = +25°C
50
ppm
Electrical Specifications
PARAMETER
(ISL21080-30, VOUT = 3.0V) VIN = 5.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to
+85°C.
DESCRIPTION
VOUT
Output Voltage
VOA
VOUT Accuracy @ TA = +25°C (Notes 7, 8)
TC VOUT
Output Voltage Temperature Coefficient
(Note 9)
VIN
Input Voltage Range
IIN
Supply Current
ΔVOUT /ΔVIN
Line Regulation
ΔVOUT/ΔIOUT
Load Regulation
CONDITIONS
MIN
(Note 12)
TYP
MAX
(Note 12)
3.0
-0.2
UNIT
V
+0.2
%
50
ppm/°C
5.5
V
0.31
1.5
µA
3.2V < VIN < 5.5V
80
350
µV/V
Sourcing: 0mA ≤ IOUT ≤ 7mA
25
100
µV/mA
Sinking: -7mA ≤ IOUT ≤ 0mA
50
350
µV/mA
50
mA
4
ms
3.2
ISC
Short Circuit Current
TA = +25°C, VOUT tied to GND
tR
Turn-on Settling Time
VOUT = ±0.1% with no load
Ripple Rejection
f = 120Hz
-40
dB
eN
Output Voltage Noise
0.1Hz ≤ f ≤ 10Hz
30
µVP-P
VN
Broadband Voltage Noise
10Hz ≤ f ≤ 1kHz
52
µVRMS
Noise Density
f = 1kHz
1.1
µV/√Hz
ΔVOUT/ΔTA
Thermal Hysteresis (Note 10)
ΔTA = +165°C
100
ppm
ΔVOUT/Δt
Long Term Stability (Note 11)
TA = +25°C
50
ppm
6
FN6934.4
May 25, 2010
ISL21080
Electrical Specifications
PARAMETER
(ISL21080-33, VOUT = 3.3V) VIN = 5.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to
+85°C.
DESCRIPTION
VOUT
Output Voltage
VOA
VOUT Accuracy @ TA = +25°C (Notes 7, 8)
TC VOUT
Output Voltage Temperature Coefficient
(Note 9)
VIN
Input Voltage Range
IIN
Supply Current
ΔVOUT /ΔVIN
Line Regulation
ΔVOUT/ΔIOUT
Load Regulation
CONDITIONS
MIN
(Note 12)
TYP
MAX
(Note 12)
3.3
-0.2
UNIT
V
+0.2
%
50
ppm/°C
5.5
V
0.31
1.5
µA
3.5 V < VIN < 5.5V
80
350
µV/V
Sourcing: 0mA ≤ IOUT ≤ 10mA
25
100
µV/mA
Sinking: -10mA ≤ IOUT ≤ 0mA
50
350
µV/mA
50
mA
4
ms
3.5
ISC
Short Circuit Current
TA = +25°C, VOUT tied to GND
tR
Turn-on Settling Time
VOUT = ±0.1% with no load
Ripple Rejection
f = 120Hz
-40
dB
eN
Output Voltage Noise
0.1Hz ≤ f ≤ 10Hz
30
µVP-P
VN
Broadband Voltage Noise
10Hz ≤ f ≤ 1kHz
52
µVRMS
Noise Density
f = 1kHz
1.1
µV/√Hz
ΔVOUT/ΔTA
Thermal Hysteresis (Note 10)
ΔTA = +165°C
100
ppm
ΔVOUT/Δt
Long Term Stability (Note 11)
TA = +25°C
50
ppm
Electrical Specifications
PARAMETER
(ISL21080-41 VOUT = 4.096V) VIN = 5.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range,
-40°C to +85°C.
DESCRIPTION
VOUT
Output Voltage
VOA
VOUT Accuracy @ TA = +25°C (Notes 7, 8)
TC VOUT
Output Voltage Temperature
Coefficient (Note 9)
VIN
Input Voltage Range
IIN
Supply Current
ΔVOUT /ΔVIN
Line Regulation
ΔVOUT/ΔIOUT
Load Regulation
CONDITIONS
MIN
(Note 12)
TYP
MAX
(Note 12)
4.096
-0.2
UNIT
V
+0.2
%
50
ppm/°C
8.0
V
0.5
1.5
µA
4.5 V < VIN < 8.0V
80
350
µV/V
Sourcing: 0mA ≤ IOUT ≤ 10mA
10
100
µV/mA
Sinking: -10mA ≤ IOUT ≤ 0mA
20
350
µV/mA
80
mA
4
ms
4.5
ISC
Short Circuit Current
TA = +25°C, VOUT tied to GND
tR
Turn-on Settling Time
VOUT = ±0.1% with no load
Ripple Rejection
f = 120Hz
-40
dB
eN
Output Voltage Noise
0.1Hz ≤ f ≤ 10Hz
30
µVP-P
VN
Broadband Voltage Noise
10Hz ≤ f ≤ 1kHz
52
µVRMS
Noise Density
f = 1kHz
1.1
µV/√Hz
ΔVOUT/ΔTA
Thermal Hysteresis (Note 10)
ΔTA = +165°C
100
ppm
ΔVOUT/Δt
Long Term Stability (Note 11)
TA = +25°C
50
ppm
7
FN6934.4
May 25, 2010
ISL21080
Electrical Specifications
PARAMETER
(ISL21080-50 VOUT = 5.0V) VIN = 6.5V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to
+85°C.
DESCRIPTION
MIN
(Note 12)
CONDITIONS
VOUT
Output Voltage
VOA
VOUT Accuracy @ TA = +25°C (Notes 7, 8)
TC VOUT
Output Voltage Temperature Coefficient
(Note 9)
VIN
Input Voltage Range
IIN
Supply Current
ΔVOUT /ΔVIN
Line Regulation
ΔVOUT/ΔIOUT
Load Regulation
TYP
MAX
(Note 12)
UNIT
5.0
-0.2
V
+0.2
%
50
ppm/°C
8.0
V
0.5
1.5
µA
5.5 V < VIN < 8.0V
80
350
µV/V
Sourcing: 0mA ≤ IOUT ≤ 10mA
10
100
µV/mA
Sinking: -10mA ≤ IOUT ≤ 0mA
20
350
µV/mA
80
mA
5.5
ISC
Short Circuit Current
TA = +25°C, VOUT tied to GND
tR
Turn-on Settling Time
VOUT = ±0.1% with no load
4
ms
Ripple Rejection
f = 120Hz
-40
dB
eN
Output Voltage Noise
0.1Hz ≤ f ≤ 10Hz
30
µVP-P
VN
Broadband Voltage Noise
10Hz ≤ f ≤ 1kHz
52
µVRMS
Noise Density
f = 1kHz
1.1
µV/√Hz
ΔVOUT/ΔTA
Thermal Hysteresis (Note 10)
ΔTA = +165°C
100
ppm
ΔVOUT/Δt
Long Term Stability (Note 11)
TA = +25°C
50
ppm
NOTES:
9. Over the specified temperature range. Temperature coefficient is measured by the box method whereby the change in VOUT is
divided by the temperature range; in this case, -40°C to +85°C = +125°C.
10. Thermal Hysteresis is the change of VOUT measured @ TA = +25°C after temperature cycling over a specified range, ΔTA. VOUT
is read initially at TA = +25°C for the device under test. The device is temperature cycled and a second VOUT measurement is
taken at +25°C. The difference between the initial VOUT reading and the second VOUT reading is then expressed in ppm. For Δ
TA = +125°C, the device under test is cycled from +25°C to +85°C to -40°C to +25°C.
11. Long term drift is logarithmic in nature and diminishes over time. Drift after the first 1000 hours will be approximately
10ppm/√1khrs.
12. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established
by characterization and are not production tested.
Typical Performance Characteristics Curves
VOUT = 0.9V, VIN = 3.0V, IOUT = 0mA,
TA = +25°C unless otherwise specified.
0.6
0.6
0.5
0.5
HIGH
0.4
IIN (µA)
IIN (µA)
0.4
0.3
LOW
0.2
TYP
0.3
0.2
-40°C
+25°C
3.6
4.0
VIN (V)
4.4
0.1
0.1
0
2.0
+85°C
2.4
2.8
3.2
3.6 4.0
VIN (V)
4.4
4.8
FIGURE 2. IIN vs VIN, 3 UNITS
8
5.2
0
2.0
2.4
2.8
3.2
4.8
5.2
FIGURE 3. IIN vs VIN OVER-TEMPERATURE
FN6934.4
May 25, 2010
ISL21080
Typical Performance Characteristics Curves
VOUT = 0.9V, VIN = 3.0V, IOUT = 0mA,
TA = +25°C unless otherwise specified.
200
0.90015
LOW
0.90010
HIGH
0.90005
0.90000
0.89995
TYP
0.89990
0.89985
0.89980
2.0
2.4
2.8
3.2
3.6 4.0
VIN (V)
4.4
4.8
150
-50
+25°C
-40°C
2.4
2.8
3.2
3.6 4.0
VIN (V)
4.4
4.8
5.2
FIGURE 5. LINE REGULATION OVER-TEMPERATURE
200
150
LOW
0.9005
100
TYP
0.9000
HIGH
ΔVOUT (mV)
NORMALIZED TO +25°C
0
-150
2.0
0.9010
VOUT (V)
50
-100
5.2
FIGURE 4. LINE REGULATION, 3 UNITS
+85°C
100
TO VIN = 3.0V
VOUT (µV) NORMALIZED TO
0.9V AT VIN = 3.0V
VOUT (V) NORMALIZED TO
0.90020
ΔVIN = +0.3V
50
0
-50
ΔVIN = -0.3V
-100
0.8995
-150
0.8990
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
-200
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
TIME (µs)
TEMPERATURE (°C)
FIGURE 6. VOUT vs TEMPERATURE NORMALIZED to
+25°C
FIGURE 7. LINE TRANSIENT RESPONSE, WITH
CAPACITIVE LOAD
200
500
ΔVIN = +0.3V
150
+85°C
50
VOUT (µV)
ΔVOUT (mV)
100
0
-50
0
-40°C
ΔVIN = -0.3V
-100
+25°C
-150
-200
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
TIME (µs)
FIGURE 8. LINE TRANSIENT RESPONSE
9
-500
-10-9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10
SINKING
LOAD (mA)
SOURCING
FIGURE 9. LOAD REGULATION OVER-TEMPERATURE
FN6934.4
May 25, 2010
ISL21080
Typical Performance Characteristics Curves
VOUT = 0.9V, VIN = 3.0V, IOUT = 0mA,
TA = +25°C unless otherwise specified.
500
1000
800
200
0
-200
-400
200
100
0
-100
-200
ILOAD = -7mA
-800
1
2
3
4
5
6
TIME (ms)
-400
7
8
9
10
-500
0
FIGURE 10. LOAD TRANSIENT RESPONSE
1
2
3
4
5
6
TIME (ms)
7
8
9
10
FIGURE 11. LOAD TRANSIENT RESPONSE
3.5
1.6
1.4
NO LOAD
3.0
7mA
1.2
2.5
1.0
VOUT (V)
VOUT (V)
ILOAD = -50µA
-300
-600
-1000
0
ILOAD = +50µA
300
400
ΔVOUT (mV)
ΔVOUT (mV)
400
ILOAD = +7mA
600
0.8
0.6
LOW
2.0
VDD
TYP
HIGH
1.5
1.0
0.4
0.5
0.2
0
1.0 1.2 1.4 1.6 1.8
2.0 2.2 2.4 2.6 2.8
0
0
3.0
0.3
0.6
0.9
TIME (ms)
VIN (V)
1.2
1.5
FIGURE 13. TURN-ON TIME
FIGURE 12. DROPOUT
Typical Performance Characteristics Curves
VOUT = 1.5V, VIN = 3.0V, IOUT = 0mA,
TA = +25°C unless otherwise specified.
500
500
UNIT 1
400
400
+85°C
300
IN (nA)
IN (nA)
UNIT 2
UNIT 3
200
100
0
2.7
300
-40°C
+25°C
200
100
3.1
3.5
3.9
4.3
VIN (V)
4.7
5.1
FIGURE 14. IIN vs VIN, 3 UNITS
10
5.5
0
2.7
3.1
3.5
3.9
4.3
VIN (V)
4.7
5.1
5.5
FIGURE 15. IIN vs VIN OVER-TEMPERATURE
FN6934.4
May 25, 2010
ISL21080
Typical Performance Characteristics Curves
VOUT = 1.5V, VIN = 3.0V, IOUT = 0mA,
150
1.50020
125
1.50015
1.50010
1.50005
UNIT 2
1.50000
UNIT 1
1.49995
UNIT 3
1.49990
1.49985
1.49980
2.7
3.1
3.5
3.9
4.3
VIN (V)
4.7
5.1
VOUT (µV)
(NORMALIZED TO VIN = 3V)
VOUT (V)
(NORMAILIZED TO 1.5V AT VIN = 3V)
TA = +25°C unless otherwise specified.
75
50
+25°C
25
+85°C
0
-25
-50
-75
-100
-40°C
-125
-150
2.7
5.5
FIGURE 16. LINE REGULATION, 3 UNITS
100
3.1
3.5
3.9
4.3
VIN (V)
4.7
5.1
5.5
FIGURE 17. LINE REGULATION OVER-TEMPERATURE
1.5005
1.5004
C L = 500pF
1.5003
UNIT 2
ΔV IN = 0.3V
1.5001
UNIT 1
1.5000
1.4999
UNIT 3
1.4998
50mV/DIV
VOUT (V)
1.5002
1.4997
ΔV IN = -0.3V
1.4996
1.4995
-40 -30 -20 -10 0
10 20 30 40 50 60 70 80
VIN(V)
FIGURE 18. VOUT vs TEMPERATURE NORMALIZED to
+25°C
1ms/DIV
FIGURE 19. LINE TRANSIENT RESPONSE, WITH
CAPACITIVE LOAD
900
C L = 0pF
700
50mV/DIV
ΔVOUT (µV)
ΔV IN = 0.3V
500
+25°C
300
100
0
-40°C
-100
ΔV IN = -0.3V
+85°C
-300
-500
1ms/DIV
FIGURE 20. LINE TRANSIENT RESPONSE
11
-7 -6 -5 -4 -3 -2 -1 0
SINKING
1
2
3
OUTPUT CURRENT
4
5
6
7
SOURCING
FIGURE 21. LOAD REGULATION OVER-TEMPERATURE
FN6934.4
May 25, 2010
ISL21080
Typical Performance Characteristics Curves
VOUT = 1.5V, VIN = 3.0V, IOUT = 0mA,
500mV/DIV
TA = +25°C unless otherwise specified.
100mV/DIV
IL = 7mA
IL = 50μA
IL = -50μA
IL = -7mA
2ms/DIV
1ms/DIV
FIGURE 22. LOAD TRANSIENT RESPONSE
FIGURE 23. LOAD TRANSIENT RESPONSE
3.5
1.52
1.50
NO LOAD
3.0
2.5
VOLTAGE (V)
7mA LOAD
1.46
1.44
1.42
1.38
1.5
VIN
UNIT 1
2.0
1.5
1.0
UNIT 3
0.5
1.40
2.0
2.5
3.0
3.5
4.0
VIN (V)
4.5
5.0
UNIT 2
0
0
5.5
160
1.0 1.5
2.0 2.5 3.0 3.5
TIME (ms)
4.0 4.5
5.0
0
NO LOAD
NO LOAD
140
-10
120
-20
PSRR (dB)
1nF
100
80
10nF
60
-30
1nF
10nF
-40
-50
40
100nF
20
0
10
0.5
FIGURE 25. TURN-ON TIME
FIGURE 24. DROPOUT
ZOUT (Ω)
VOUT (V)
1.48
-60
100nF
100
1k
10k
FREQUENCY (Hz)
100k
FIGURE 26. ZOUT vs FREQUENCY
12
1M
-70
10
100
1k
10k
FREQUENCY (Hz)
100k
1M
FIGURE 27. PSRR vs FREQUENCY
FN6934.4
May 25, 2010
ISL21080
Typical Performance Characteristics Curves
1.6
1.6
NO LOAD
1.4
7mA
1.4
1.2
1.0
VOUT (V)
VOUT (V)
1.2
0.8
0.6
1.0
0.8
0.4
0.2
0.2
1.4
1.6
1.8
2.0 2.2
VIN (V)
2.4
2.6
2.8
0
1.3
3.0
7mA
NO LOAD
0.6
0.4
0
1.2
FIGURE 28. DROPOUT, ISL21080-10
1.5
1.7
1.9
2.1 2.3
VIN (V)
2.5
2.7
2.9
FIGURE 29. DROPOUT, ISL21080-12
3.3
3.0
2.9
2.8
NO LOAD
3.2
7mA
VOUT (V)
2.7
VOUT (V)
TA = +25°C unless otherwise specified.
2.6
2.5
2.4
2.3
2.2
NO LOAD
7mA
3.1
3.0
2.9
2.8
2.1
2.0
2.5
2.7
2.9
3.1
VIN (V)
3.3
2.7
3.0
3.5
3.6
3.4
3.3
3.2
3.1
3.0
3.3
3.8
4.0
NO LOAD
7mA
4.2
7mA
VOUT (V)
VOUT (V)
4.3
NO LOAD
3.4
3.6
VIN (V)
FIGURE 31. DROPOUT, ISL21080-30
FIGURE 30. DROPOUT, ISL21080-25
3.5
3.2
4.1
4.0
3.9
3.8
3.5
3.7
3.9
VIN (V)
4.1
4.3
FIGURE 32. DROPOUT, ISL21080-33
13
4.5
3.7
4.1
4.3
4.5
4.7
VIN (V)
4.9
5.1
FIGURE 33. DROPOUT, ISL21080-41
FN6934.4
May 25, 2010
ISL21080
Typical Performance Characteristics Curves
TA = +25°C unless otherwise specified.
5.3
NO LOAD
5.2
7mA
VOUT (V)
5.1
5.0
4.9
4.8
4.7
5.0
5.2
5.4
5.6
5.8
6.0
VIN (V)
FIGURE 34. DROPOUT, ISL21080-50
High Current Application
1.502
1.502
VIN = 5V
VIN = 5V
1.500
1.498
VREF (V)
VREF (V)
1.500
VIN = 3.5V
1.496
1.492
0
5
10
15
20
25
1.496
1.494
30
35
ILOAD (mA)
FIGURE 35. DIFFERENT VIN AT ROOM TEMPERATURE
Applications Information
FGA Technology
The ISL21080 series of voltage references use the
floating gate technology to create references with very
low drift and supply current. Essentially, the charge
stored on a floating gate cell is set precisely in
manufacturing. The reference voltage output itself is a
buffered version of the floating gate voltage. The
resulting reference device has excellent characteristics
which are unique in the industry: very low temperature
drift, high initial accuracy, and almost zero supply
current. Also, the reference voltage itself is not limited by
voltage bandgaps or zener settings, so a wide range of
reference voltages can be programmed (standard
voltage settings are provided, but customer-specific
voltages are available).
The process used for these reference devices is a floating
gate CMOS process, and the amplifier circuitry uses CMOS
transistors for amplifier and output transistor circuitry.
While providing excellent accuracy, there are limitations in
14
VIN = 3.5V
VIN = 3.3V
VIN = 3.3V
1.494
1.498
1.492
0
5
10
15
20
25
30
35
ILOAD (mA)
FIGURE 36. DIFFERENT VIN AT HIGH TEMPERATURE
(+85°C)
output noise level and load regulation due to the MOS
device characteristics. These limitations are addressed with
circuit techniques discussed in other sections.
Board Assembly Considerations
FGA references provide high accuracy and low
temperature drift but some PC board assembly
precautions are necessary. Normal Output voltage shifts
of 100µV to 1mV can be expected with Pb-free reflow
profiles or wave solder on multi-layer FR4 PC boards.
Precautions should be taken to avoid excessive heat or
extended exposure to high reflow or wave solder
temperatures, this may reduce device initial accuracy.
Post-assembly x-ray inspection may also lead to permanent
changes in device output voltage and should be minimized
or avoided. If x-ray inspection is required, it is advisable to
monitor the reference output voltage to verify excessive
shift has not occurred. If large amounts of shift are
observed, it is best to add an X-ray shield consisting of thin
zinc (300µm) sheeting to allow clear imaging, yet block
x-ray energy that affects the FGA reference.
FN6934.4
May 25, 2010
ISL21080
Special Applications Considerations
In addition to post-assembly examination, there are also
other X-ray sources that may affect the FGA reference
long term accuracy. Airport screening machines contain
X-rays and will have a cumulative effect on the voltage
reference output accuracy. Carry-on luggage screening
uses low level X-rays and is not a major source of output
voltage shift, however, if a product is expected to pass
through that type of screening over 100 times, it may
need to consider shielding with copper or aluminum.
Checked luggage X-rays are higher intensity and can
cause output voltage shift in much fewer passes, thus
devices expected to go through those machines should
definitely consider shielding. Note that just two layers of
1/2 ounce copper planes will reduce the received dose by
over 90%. The leadframe for the device which is on the
bottom also provides similar shielding.
If a device is expected to pass through luggage X-ray
machines numerous times, it is advised to mount a
2-layer (minimum) PC board on the top, and along with a
ground plane underneath will effectively shield it from
from 50 to 100 passes through the machine. Since these
machines vary in X-ray dose delivered, it is difficult to
produce an accurate maximum pass recommendation.
TABLE 1. EXAMPLE OF BATTERY LIFE IN YEARS FOR
ISL21080 IN VARIOUS POWER ON
CONDITIONS WITH 1.5µA MAX CURRENT
BATTERY RATING
50% DUTY
(mAH)
CONTINUOUS
CYCLE
10% DUTY
CYCLE
40
3
6
30*
225
16.3*
32.6*
163*
NOTE: *Typical Li-ion battery has a shelf life of up to 10 years.
VIN = +3.0V
10µF
0.01µF
VIN
VOUT
ISL21080
GND
0.001µF TO 0.01µF
REF IN
SERIAL
BUS
ENABLE
SCK
SDAT
12 TO 24-BIT
A/D CONVERTER
Nanopower Operation
Reference devices achieve their highest accuracy when
powered up continuously, and after initial stabilization
has taken place. This drift can be eliminated by leaving
the power on continuously.
The ISL21080 is the first high precision voltage reference
with ultra low power consumption that makes it possible to
leave power on continuously in battery operated circuits.
The ISL21080 consumes extremely low supply current due
to the proprietary FGA technology. Supply current at room
temperature is typically 350nA, which is 1 to 2 orders of
magnitude lower than competitive devices. Application
circuits using battery power will benefit greatly from having
an accurate, stable reference, which essentially presents no
load to the battery.
In particular, battery powered data converter circuits that
would normally require the entire circuit to be disabled
when not in use can remain powered up between
conversions as shown in Figure 37. Data acquisition
circuits providing 12 bits to 24 bits of accuracy can
operate with the reference device continuously biased
with no power penalty, providing the highest accuracy
and lowest possible long term drift.
FIGURE 37. REFERENCE INPUT FOR ADC CONVERTER
ISL21080 Used as a Low Cost Precision
Current Source
Using an N-JET and a Nanopower voltage reference,
ISL21080, a precision, low cost, high impedance current
source can be created. The precision of the current
source is largely dependent on the tempco and accuracy
of the reference. The current setting resistor contributes
less than 20% of the error.
Board Mounting Considerations
For applications requiring the highest accuracy, board
mounting location should be reviewed. Placing the device
in areas subject to slight twisting can cause degradation
of the accuracy of the reference voltage due to die
stresses. It is normally best to place the device near the
edge of a board, or the shortest side, as the axis of
bending is most limited at that location. Obviously,
mounting the device on flexprint or extremely thin PC
material will likewise cause loss of reference accuracy.
Other reference devices consuming higher supply currents
will need to be disabled in between conversions to conserve
battery capacity. Absolute accuracy will suffer as the device
is biased and requires time to settle to its final value, or,
may not actually settle to a final value as power on time
may be short. Table 1 shows an example of battery life in
years for ISL21080 in various power on condition with
1.5µA maximum current consumption.
15
FN6934.4
May 25, 2010
ISL21080
ISET =
VOUT
RSET
IL = ISET + IRSET
VIN
0.01µF
VOUT
ISL21080-1.5
VOUT = 1.5V
RSET
ZOUT > 100MΩ
10kΩ
0.1%
10ppm/°C
GND
ISY ~ 0.31µA
ISET
IL AT 0.1% ACCURACY
~150.3µA
FIGURE 38. ISL21080 USED AS A LOW COST
PRECISION CURRENT SOURCE
Noise Performance and Reduction
The output noise voltage in a 0.1Hz to 10Hz bandwidth is
typically 30µVP-P. This is shown in the plot in the “Typical
Performance Characteristics Curves” which begin on
page 10. The noise measurement is made with a
bandpass filter 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 at 12.6Hz to create a filter with a
9.9Hz bandwidth. Noise in the 10kHz to 1MHz bandwidth
is approximately 400µVP-P with no capacitance on the
output, as shown in Figure 39. These noise
measurements are made with a 2 decade bandpass filter
made of a 1-pole high-pass filter with a corner frequency
at 1/10 of the center frequency and 1-pole low-pass filter
with a corner frequency at 10 times the center frequency.
Figure 39 also shows the noise in the 10kHz to 1MHz
band can be reduced to about 50µVP-P using a 0.001µF
capacitor on the output. Noise in the 1kHz to 100kHz
band can be further reduced using a 0.1µF capacitor on
the output, but noise in the 1Hz to 100Hz band increases
due to instability of the very low power amplifier with a
0.1µF capacitance load. For load capacitances above
0.001µF, the noise reduction network shown in Figure 40
is recommended. This network reduces noise
significantly over the full bandwidth. As shown in
Figure 39, noise is reduced to less than 40µVP-P from
1Hz to 1MHz using this network with a 0.01µF capacitor
and a 2kΩ resistor in series with a 10µF capacitor.
Turn-On Time
The ISL21080 devices have ultra-low supply current and
thus, the time to bias-up internal circuitry to final values
will be longer than with higher power references. Normal
turn-on time is typically 7ms. This is shown in Figure 38.
Since devices can vary in supply current down to
>300nA, turn-on time can last up to about 12ms. Care
should be taken in system design to include this delay
before measurements or conversions are started.
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.
400
NOISE VOLTAGE (µVP-P)
+8V TO 28V
CL = 0
350
CL = 0.001µF
300
CL = 0.1µF
CL = 0.01µF AND 10µF + 2kΩ
250
200
150
100
50
0
1
10
100
1k
10k
100k
FIGURE 39. NOISE REDUCTION
VIN = 3.0V
10µF
0.1µF
VIN
VO
ISL21080
GND
2kΩ
0.01µF
10µF
FIGURE 40. NOISE REDUCTION NETWORK
16
FN6934.4
May 25, 2010
ISL21080
Typical Application Circuits
VIN = 3.0V
R = 200Ω
2N2905
VIN
ISL21080VOUT
2.5V/50mA
0.001µF
GND
FIGURE 41. PRECISION 2.5V 50mA REFERENCE
2.7V TO 5.5V
0.1µF
10µF
VIN
VOUT
ISL21080
GND
0.001µF
VCC
RH
VOUT
X9119
+
SDA
2-WIRE BUS
SCL
VSS
–
VOUT
(BUFFERED)
RL
FIGURE 42. 2.5V FULL SCALE LOW-DRIFT 10-BIT ADJUSTABLE VOLTAGE SOURCE
2.7V TO 5.5V
0.1µF
10µF
VIN
VOUT
ISL21080
+
VOUT SENSE
–
LOAD
GND
FIGURE 43. KELVIN SENSED LOAD
17
FN6934.4
May 25, 2010
ISL21080
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to
web to make sure you have the latest Rev.
DATE
REVISION
CHANGE
5/12/10
FN6934.4
Changed Theta JA in the “Thermal Information” on page 3 from 170 to 275. Added Theta JC
and applicable note.
4/29/10
FN6934.3
Incorrect Thermal information, needs to be re-evaluated and added at a later date when the
final data is available. Removed Theta JC and applicable note from “Thermal Information” on
page 3.
4/14/10
Corrected y axis label on Figure 9 from “VOUT (V)” to “VOUT (µV)”
4/6/10
Source/sink for 0.9V option changed from 7mA to 10mA
Line regulation condition for 0.9V changed from 2.7V to 2V
Line regulation typical for 0.9V option changed from 10 to 30µV/V
ΔTA in Thermal Hysterisis conditions of 0.9V option changed from 165°C to 125°C
Moved “Board Assembly Considerations” and “Special Applications Considerations” to page 14.
Deleted “Handling and Board Mounting” section since “Board Assembly Considerations” on
page 14 contains same discussion.
Added “Special Note: Post-assembly x-ray inspection may lead to permanent changes in
device output voltage and should be minimized or avoided.” to “ISL21080” on page 1
Figures 2 and 3 revised to show line regulation and Iin down to 2V.
Figures 4 and 5 revised to show Vin down to 2V.
Added “Initial accuracy can change 10mV or more under extreme radiation.” to Note 8 on
page 3.
4/1/10
1. page 3: Change Vin Min from 2.7 to 2.0
2. page 3: Change Iin Typ from 0.31 to 0.35
3. page 3: Change Line Reg Typ from 80 to 10
4. page 3: Change Load Reg Condition from 7mA to 10mA and -7mA to -10mA
5. page 3: Change Load Reg Typ for Source from 25 to 6 and Sink from 50 to 23.
6. page 3: Change Isc Typ from 50 to 30
7. page 3: Change tR from 4 to 1
8. Change Ripple Rejection typ for all options from -30 to -40
9. page 3: Change eN typ from 30 to 40V
10. page 3: Change VN typ from 50 to 10V
11. page 3: Change Noise Density typ from 1.1 to 2.2
12. page 3: Change Long Term Stability from 50 to 60
13. Added Figure 2 to 13 on page 8 to page 10 for 0.9V curves.
14. Added Figure 28 to 34 on page 13 to page 14 for other options Dropout curve.
15. page 1: Change Input Voltage Range for 0.9V option from TBD to 2V to 5.5V
16. Added latch up to “Absolute Maximum Ratings” on page 3
17. Added Junction Temperature to “Thermal Information” on page 3
18. Added JEDEC standards used at the time of testing for “ESD Ratings” on page 3
19. HBM in “Absolute Maximum Ratings” on page 3 changed from 5.5kV to 5kV
20. Added Theta JC and applicable note.
3/25/10
Throughout- Converted to new format. Changes made as follows:
Moved “Pin Configuration” and “Pin Descriptions” to page 2
Added “Related Literature*(see page 20)” to page 1
Added key selling feature graphic Figure 1 to page 1
Added "Boldface limits apply..." note to common conditions of Electrical Specifications tables
on page 3 through page 8. Bolded applicable specs. Added Note 12 to MIN MAX columns of all
Electrical Specifications tables.
Added ““Environmental Operating Conditions” to page 3 and added Note 4
Added “The process used for these reference devices is a floating gate CMOS process, and the
amplifier circuitry uses CMOS transistors for amplifier and output transistor circuitry. While
providing excellent accuracy, there are limitations in output noise level and load regulation due
to the MOS device characteristics. These limitations are addressed with circuit techniques
discussed in other sections.” on page 14
18
FN6934.4
May 25, 2010
ISL21080
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to
web to make sure you have the latest Rev. (Continued)
DATE
REVISION
CHANGE
10/14/09
FN6934.2
1. Removed "Coming Soon" on page 1 and 2 for -10, -20, -41, and -50 options.
2. Page 1. Moved "ISL21080-50
5.5V to 8.0V" from bullet to sub-bullet.
3. Update package outline drawing P3.064 to most recent revision. Updates to package were
to add land pattern and move dimensions from table onto drawing (no change to package
dimensions)
09/04/09
FN6934.1
Converted to new Intersil template. Added Revision History and Products Information.
Updated Ordering Information to match Intrepid, numbered all notes and added Moisture
Sensitivity Note with links. Moved Pin Descriptions to page 1 to follow pinout
Changed in Features Section
From: Reference Output Voltage
1.25V, 1.5V, 2.500V, 3.300V
To: Reference Output Voltage
0.900V, 1.024V, 1.250V, 1.500V, 2.048V, 2.500V, 3.000V,
3.300V, 4.096V, 5.000V
From: Initial Accuracy: 1.5V
±0.5%
To: Initial Accuracy:
ISL21080-09 and -10
±0.7%
ISL21080-12
±0.6%
ISL21080-15
±0.5%
ISL21080-20 and -25
±0.3%
ISL21080-30, -33, -41, and -50
±0.2%
FROM: Input Voltage Range
ISL21080-12 (Coming Soon)
2.7V to 5.5V
ISL21080-15
2.7V to 5.5V
ISL21080-25 (Coming Soon)
2.7V to 5.5V
ISL21080-33 (Coming Soon)
3.5V to 5.5V
TO: Input Voltage Range:
ISL21080-09, -10, -12, -15, -20, and -25
2.7V to 5.5V
ISL21080-09, -10, and 20 (Coming Soon)
ISL21080-30
3.2V to 5.5V
ISL21080-33
3.5V to 5.5V
ISL21080-41 (Coming Soon)
4.5V to 8.0V
Added: ISL21080-50 (Coming Soon)
5.5V to 8.0V Output Voltage Noise
30µVP-P (0.1Hz to 10Hz)
Updated Electrical Spec Tables by Tables with Voltage References 9, 10, 12, 20, 25, 30, 33
and 41.
Added to Abs Max Ratings:
VIN to GND (ISL21080-41 and 50 only
-0.5V to +10V
VOUT to GND (10s)
(ISL21080-41 and 50 only
-0.5V to +5.1V
Changed Tja in Thermal information from "202.70" to "170" to match ASYD in Intrepid
Added Note:
Post-assembly x-ray inspection may also lead to permanent changes in device output voltage
and should be minimized or avoided. Most inspection equipment will not affect the FGA
reference voltage, but if x-ray inspection is required, it is advisable to monitor the reference
output voltage to verify excessive shift has not occurred.
Added Special Applications Considerations Section on page 12.
07/28/09
FN6934.0
19
Initial Release.
FN6934.4
May 25, 2010
ISL21080
Products
Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The
Company's products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones,
handheld products, and notebooks. Intersil's product families address power management and analog signal
processing functions. Go to www.intersil.com/products for a complete list of Intersil product families.
*For a complete listing of Applications, Related Documentation and Related Parts, please see the respective device
information page on intersil.com: ISL21080
To report errors or suggestions for this datasheet, please go to www.intersil.com/askourstaff
FITs are available from our website at http://rel.intersil.com/reports/search.php
For additional products, see www.intersil.com/product_tree
Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems as noted
in the quality certifications found at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications
at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by
Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any
infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any
patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
20
FN6934.4
May 25, 2010
ISL21080
Package Outline Drawing
P3.064
3 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE (SOT23-3)
Rev 2, 9/09
2.92±0.12
4
DETAIL "A"
C
L
0.13±0.05
2.37±0.27
1.30±0.10
4
C
L
0.950
0.435±0.065
0 - 8 deg.
0.20 M C
TOP VIEW
10° TYP
(2 plcs)
0.25
0.91±0.03
GAUGE PLANE
1.00±0.12
SEATING PLANE
C
SEATING PLANE
0.10 C
0.31±0.10 5
0.013(MIN)
0.100(MAX)
SIDE VIEW
DETAIL "A"
(0.60)
NOTES:
(2.15)
1.
Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2.
Dimensioning and tolerancing conform to AMSEY14.5m-1994.
3.
Reference JEDEC TO-236.
4.
Dimension does not include interlead flash or protrusions.
Interlead flash or protrusions shall not exceed 0.25mm per side.
5.
Footlength is measured at reference to gauge plane.
(1.25)
(0.95 typ.)
TYPICAL RECOMMENDED LAND PATTERN
21
FN6934.4
May 25, 2010
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