ISL21070_11 [INTERSIL]
25μA Micropower Voltage References Low Power Standby Voltages; 25μA微功耗电压基准低功耗待机电压
| 型号： | ISL21070_11 |
| 厂家： | 
Intersil |
| 描述： | 25μA Micropower Voltage References Low Power Standby Voltages |
| 文件： | 总11页 (文件大小：410K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
25μA Micropower Voltage References
ISL21070
Features
The ISL21070 voltage references are analog voltage
references featuring low supply voltage operation at ultra-low
25μA max operating current.
• Reference Output Voltage
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.600V, 2.048V, 2.500V
• Initial Accuracy: 0.600V. . . . . . . . . . . . . . . . . . . . . . . . . . ±1.0%
• Initial Accuracy: 2.048V. . . . . . . . . . . . . . . . . . . . . . . . .±0.25%
Additionally, the ISL21070 family features guaranteed initial
accuracy as low as ±0.2% and 30ppm/°C temperature
coefficient.
• Initial Accuracy: 2.5V . . . . . . . . . . . . . . . . . . . . . . . . . . . ..±0.2%
• Input Voltage Range
- ISL21070-06 . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
- ISL21070-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
- ISL21070-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
These references are ideal for general purpose applications for
performance at lower cost. The ISL21070 is provided in an
industry standard 3 Ld SOT-23 pinout.
The ISL21070 offers output voltages that can be used as
precision voltage sources for control loops, standby voltages
for low power states for DSP, FPGA, Data path Controllers,
Microcontrollers and other core voltages: 0.600V, 2.048V, and
2.5V.
• Output Voltage Noise. . . . . . . . . . . . .30μVP-P (0.1Hz to 10Hz)
• Supply Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25μA (Max)
• Tempco (0.600V only) . . . . . . . . . . . . . . . . . . . . . . . 50ppm/°C
• Tempco (all others) . . . . . . . . . . . . . . . . . . . . . . . . . 30ppm/°C
• Output Current Capability . . . . . . . . . . . . . . . . . . . . . . . ±10mA
• Operating Temperature Range. . . . . . . . . . . .-40°C to +85°C
• Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Ld SOT-23
• Pb-Free (RoHS compliant)
Applications*(see page 10)
• Battery Management/Monitoring
• Low Power Standby Voltages
• Portable Instrumentation
Related Literature*(see page 10)
• Consumer/Medical Electronics
• Wearable Electronics
• AN1533, “X-Ray Effects on Intersil FGA References”
• AN1494, “Reflow and PC Board Assembly Effects on Intersil
FGA References”
• Lower Cost Industrial and Instrumentation
• Power Regulation Circuits
• Control Loops and Compensation Networks
• LED/Diode Supply
2.5020
2.5015
TYP
2.5010
2.5005
2.5000
2.4995
LOW
HIGH
2.4990
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80
TEMPERATURE (°C)
FIGURE 1. V
vs TEMPERATURE NORMALIZED to +25°C
OUT
July 1, 2011
FN7599.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2010, 2011. 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
ISL21070
Typical Application Circuit
2.7V TO 5.5V
0.1μF
10μF
VIN
+
–
V
OUT SENSE
LOAD
VOUT
ISL21070
GND
Pin Configuration
Pin Descriptions
ISL21070
(3 LD SOT-23)
TOP VIEW
1
2
VIN
3
GND
VOUT
PIN NUMBER
PIN NAME
DESCRIPTION
1
2
3
VIN
VOUT
GND
Input Voltage Connection. Range: 2.7 to 5.5V
Voltage Reference Output.
Ground Connection
Ordering Information
PACKAGE
Tape & Reel
(Pb-Free)
PART NUMBER
(Notes 1, 2, 3)
PART MARKING
(Note 4)
V
OPTION
(V)
TEMP. RANGE
PKG.
DWG. #
OUT
GRADE
(°C)
ISL21070DIH306Z-TK
ISL21070CIH320Z-TK
ISL21070CIH325Z-TK
NOTES:
BDNA
BCHA
BCJA
0.600
±1.0%, 50ppm/°C
±0.25%, 30ppm/°C
±0.2%, 30ppm/°C
-40 to +85
-40 to +85
-40 to +85
3 Ld SOT-23
3 Ld SOT-23
3 Ld SOT-23
P3.064
2.048
2.5
P3.064
P3.064
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 ISL21070. For more information on MSL please see techbrief TB363.
4. The part marking is located on the bottom of the part.
FN7599.2
July 1, 2011
2
ISL21070
Absolute Voltage Ratings
Thermal Information
Max Voltage
Thermal Resistance (Typical)
3 Ld SOT-23 (Notes 6, 7) . . . . . . . . . . . . . . .
Continuous Power Dissipation (T = +85°C) . . . . . . . . . . . . . . . . . . .99mW
θ
JA (°C/W)
275
θ
JC (°C/W)
110
V
V
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +6.5V
IN
(pin) to GND (10s) . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to V
+ 1V
OUT
OUT
A
ESD Ratings
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C
Pb-Free Reflow Profile (Note 8) . . . . . . . . . . . . . . . . . . . . . . . see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Human Body Model (Tested per JESD22-A114). . . . . . . . . . . . . . .6000V
Machine Model (Tested per JESD22-A115) . . . . . . . . . . . . . . . . . . . 500V
Charged Device Model (Tested per JESD22-C101) . . . . . . . . . . . . . . 2kV
Latch Up (Tested Per JESD-78) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA
Recommended Operating Conditions
Temperature Range (Industrial) . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
Environmental Operating Conditions
X-Ray Exposure (Note 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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:
5. 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 7.
6. θ is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
JA
7. For θ , the “case temp” location is taken at the package top center.
JC
8. Post-reflow drift for the ISL21070 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.
Electrical Specifications (ISL21070-06, V = 0.600V) V = 3.0V, T = -40°C to +85°C, I
= 0, unless otherwise specified.
MAX
OUT
IN
A
OUT
Boldface limits apply over the operating temperature range, -40°C to +85°C.
MIN
SYMBOL
PARAMETER
CONDITIONS
(Note 12)
TYP
(Note 12
UNITS
V
Output Voltage
Accuracy @ T = +25°C
0.600
V
%
OUT
V
V
ISL21070 D-grade
-1.0
2.7
+1.0
50
OA
OUT
A
TC V
Output Voltage Temperature Coefficient
(Note 9)
ISL21070 D-grade
ppm/°C
OUT
V
Input Voltage Range
Supply Current
5.5
25
V
μA
IN
I
11
20
3
IN
ΔV /ΔV
Line Regulation
Load Regulation
2.7V < V < 5.5V
250
100
100
μV/V
μV/mA
μV/mA
mA
OUT
IN
IN
ΔV /ΔI
Sourcing: 0mA ≤ I
OUT
≤ 10mA
≤ 0mA
OUT
OUT
Sinking: -10mA ≤ I
6
OUT
I
Short Circuit Current
T = +25°C, V tied to GND
OUT
50
150
-20
30
10
20
70
SC
A
t
Turn-on Settling Time
Ripple Rejection
V
= ±0.1%
μs
R
OUT
f = 10kHz
dB
e
Output Voltage Noise
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 10kHz
μV
N
P-P
V
Broadband Voltage Noise
Thermal Hysteresis (Note 10)
Long Term Stability (Note 11)
μV
N
RMS
ΔV /ΔT
ΔT = +125°C
ppm
ppm
OUT
A
A
ΔV /Δt
T = +25°C
OUT
A
Electrical Specifications (ISL21070-20, V = 2.048V) V = 3.0V, T = -40°C to +85°C, I
= 0, unless otherwise specified.
MAX
OUT
IN
A
OUT
Boldface limits apply over the operating temperature range, -40°C to +85°C.
MIN
SYMBOL
PARAMETER
CONDITIONS
(Note 12)
TYP
(Note 12
UNIT
V
Output Voltage
2.048
V
OUT
V
V
Accuracy @ T = +25°C
ISL21070 C-grade: 2.048
-0.25
+0.25
%
OA
OUT
A
FN7599.2
July 1, 2011
3
ISL21070
Electrical Specifications (ISL21070-20, V = 2.048V) V = 3.0V, T = -40°C to +85°C, I
= 0, unless otherwise specified.
MAX
OUT
IN
A
OUT
Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued)
MIN
SYMBOL
TC V
PARAMETER
CONDITIONS
ISL21070 C-grade
(Note 12)
TYP
(Note 12
UNIT
Output Voltage Temperature Coefficient
(Note 9)
30
ppm/°C
OUT
V
Input Voltage Range
Supply Current
2.7
5.5
25
V
μA
IN
I
11
25
3
IN
ΔV /ΔV
Line Regulation
Load Regulation
2.7V < V < 5.5V
250
100
100
μV/V
μV/mA
μV/mA
mA
OUT
IN
IN
ΔV /ΔI
Sourcing: 0mA ≤ I
OUT
≤ 10mA
≤ 0mA
OUT
OUT
Sinking: -10mA ≤ I
6
OUT
I
Short Circuit Current
T = +25°C, V tied to GND
OUT
50
150
-20
30
10
40
50
SC
A
t
Turn-on Settling Time
Ripple Rejection
V
= ±0.1%
μs
R
OUT
f = 10kHz
dB
e
Output Voltage Noise
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 10kHz
μV
N
P-P
V
Broadband Voltage Noise
Thermal Hysteresis (Note 10)
Long Term Stability (Note 11)
μV
N
RMS
ΔV /ΔT
ΔT = +125°C
ppm
ppm
OUT
A
A
ΔV /Δt
T = +25°C
OUT
A
Electrical Specifications (ISL21070-25, V = 2.5V) V = 3.0V, T = -40°C to +85°C, I
= 0, unless otherwise specified.
MAX
OUT
IN
A
OUT
Boldface limits apply over the operating temperature range, -40°C to +85°C.
MIN
SYMBOL
PARAMETER
Output Voltage
Accuracy @ T = +25°C
CONDITIONS
(Note 12)
TYP
(Note 12
UNIT
V
2.5
V
%
OUT
V
V
ISL21070 C-grade
ISL21070 C-grade
-0.2
+0.2
30
OA
OUT
A
TC V
Output Voltage Temperature
Coefficient (Note 9)
ppm/°C
OUT
V
Input Voltage Range
Supply Current
2.7
5.5
25
V
IN
I
V
= V
IN
11
15
6
μA
IN
EN
ΔV /ΔV
Line Regulation
Load Regulation
2.7V < V < 5.5V
250
100
μV/V
μV/mA
μV/mA
OUT
IN
IN
ΔV /ΔI
Sourcing: 0mA ≤ I
Sourcing: 0mA ≤ I
≤ 7mA
OUT
OUT
OUT
OUT
≤ 10mA
133
(T = +70°C)
A
Sinking: -10mA ≤ I
≤ 0mA
10
30
100
μV/mA
mA
OUT
I
Short Circuit Current
T = +25°C, V
tied to GND
OUT
SC
A
t
Turn-on Settling Time
Ripple Rejection
V
= ±0.1%
150
-20
30
μs
R
OUT
f = 10kHz
dB
e
Output Voltage Noise
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 10kHz
μV
N
N
P-P
V
Broadband Voltage Noise
Thermal Hysteresis (Note 10)
Long Term Stability (Note 11)
10
μV
RMS
ΔV /ΔT
ΔT = +125°C
20
ppm
ppm
OUT
A
A
ΔV /Δt
T = +25°C
50
OUT
A
NOTES:
9. Over the specified temperature range. Temperature coefficient is measured by the box method whereby the change in V
temperature range; in this case, -40°C to +85°C = +125°C.
is divided by the
OUT
10. Thermal Hysteresis is the change of V
measured @ T = +25°C after temperature cycling over a specified range, ΔT . V
is read initially at T =
OUT
A
A
OUT
A
+25°C for the device under test. The device is temperature cycled and a second V
measurement is taken at +25°C. The difference between the
OUT
initial V
reading and the second V
reading is then expressed in ppm. For Δ T = +125°C, the device under test is cycled from +25°C to +85°C
OUT
OUT A
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. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
FN7599.2
July 1, 2011
4
ISL21070
Typical Performance Characteristics Curves
V
= 2.5V, V = 3V, I = 0mA, T = +25°C unless otherwise specified.
OUT
IN
OUT
A
20
18
16
14
12
10
8
14
13
12
11
10
9
HIGH
TYP
+25°C
-85°C
6
4
LOW
4.3
-40°C
3.5
2
0
2.7
8
2.7
3.1
3.9
4.3
IN (V)
4.7
5.1
5.5
3.1
3.5
3.9
4.7
5.1
5.5
V
IN (V)
V
FIGURE 2. I vs V , 3 UNITS
FIGURE 3. I vs V OVER-TEMPERATURE
IN
IN
IN
IN
2.50030
2.50025
2.50020
2.50015
2.50010
2.50005
2.50000
2.49995
2.49990
200
150
100
50
+25°C
TYP
-85°C
0
-40°C
-50
-100
-150
LOW
3.5
HIGH
4.3
VIN (V)
2.7
3.1
3.9
4.7
5.1
5.5
2.7
3.1
3.5
3.9
V
4.3
4.7
5.1
5.5
IN (V)
FIGURE 5. LINE REGULATION OVER-TEMPERATURE
FIGURE 4. LINE REGULATION, 3 UNITS
2.5020
2.5015
2.5010
2.5005
2.5000
2.4995
2.4990
25
20
15
10
5
ΔVIN = +0.3V
TYP
0
-5
-10
-15
-20
-25
ΔVIN = -0.3V
LOW
HIGH
0
50 100 150 200 250 300 350 400 450 500
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80
TEMPERATURE (°C)
TIME (μs)
FIGURE 7. LINE TRANSIENT RESPONSE, WITH 1nF CAPACITIVE
LOAD
FIGURE 6. V
vs TEMPERATURE NORMALIZED to +25°C
OUT
FN7599.2
July 1, 2011
5
ISL21070
Typical Performance Characteristics Curves
V
= 2.5V, V = 3V, I = 0mA, T = +25°C unless otherwise specified. (Continued)
OUT
IN
OUT
A
100
80
60
40
20
25
20
15
10
+25°C
ΔVIN = +0.3V
5
0
0
-40°C
-20
-40
-5
-10
-15
-20
-25
ΔVIN = -0.3V
-60
-85°C
-80
-100
-10 -9 -8 -7 -6 -5 -4 -3 -2 -1
0
1
2
3
4
5
6
7
8
9
10
0
50 100 150 200 250 300 350 400 450 500
SINKING
LOAD (mA)
SOURCING
TIME (μs)
FIGURE 9. LOAD REGULATION OVER-TEMPERATURE
FIGURE 8. LINE TRANSIENT RESPONSE, WITH NO CAPACITIVE
LOAD
200
500
400
300
160
120
80
ILOAD = +50mA
ILOAD = +10mA
200
40
100
0
0
-40
-80
-100
-200
-300
ILOAD = -50mA
-120
-160
-200
ILOAD = -10mA
-400
-500
0
20
40
60
80 100 120 140 160 180 200
0
20
40
60
80 100 120 140 160 180 200
TIME (μs)
TIME (μs)
FIGURE 10. LOAD TRANSIENT RESPONSE
FIGURE 11. LOAD TRANSIENT RESPONSE
2.510
3.5
3.0
2.5
2.0
1.5
1.0
0.5
2.508
2.506
2.504
2.502
2.500
2.498
2.496
2.494
2.492
2.490
TYP
10mA LOAD
VDD
NO LOAD
LOW
HIGH
0
2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0
0
50
100
150
200
250
300
TIME (μs)
V
IN (V)
FIGURE 13. TURN-ON TIME
FIGURE 12. DROPOUT
FN7599.2
July 1, 2011
6
ISL21070
Typical Performance Characteristics Curves
V
= 2.5V, V = 3V, I = 0mA, T = +25°C unless otherwise specified. (Continued)
IN OUT A
OUT
120
100
80
60
40
20
0
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
NO LOAD
1nF LOAD
NO LOAD
1nF LOAD
10nF LOAD
10nF LOAD
100nF LOAD
100nF LOAD
1
10
100
1k
10k
100k
1M
1
10
100
1k
10k
100k
1M 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 15. PSRR vs FREQUENCY
FIGURE 14. Z
vs f vs C
L
OUT
1s/DIV
FIGURE 16. V
NOISE, 0.1Hz TO 10Hz
OUT
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.
Applications Information
FGA Technology
The ISL21070 series of voltage references use the floating gate
technology to create references with very low drift and supply
Handling and Board Mounting
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).
FGA references provide excellent initial accuracy and low
temperature drift at the expense of very little power drain. There
are some precautions to take to insure this accuracy is not
compromised. Excessive heat during solder reflow can cause
excessive initial accuracy drift, so the recommended +260°C
max temperature profile should not be exceeded. Expect up to
1mV drift from the solder reflow process.
FGA references are susceptible to excessive X-radiation like that
used in PC board manufacturing. Initial accuracy can change
10mV or more under extreme radiation. If an assembled board
needs to be X-rayed, care should be taken to shield the FGA
reference device.
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
FN7599.2
July 1, 2011
7
ISL21070
If a device is expected to pass through luggage X-ray machines
Board Mounting Considerations
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 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.
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.
Noise Performance and Reduction
The output noise voltage in a 0.1Hz to 10Hz bandwidth is
typically 30μVP-P. 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.
Wideband noise is reduced by adding capacitor to the output, but
the value should be limited to 1nF or less to insure stability.
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.
Temperature Drift
The limits stated for output accuracy over-temperature are
governed by the method of measurement. For the -40°C to 85°C
temperature range, measurements are made at +25°C and the
two extremes. This measurement method combined with the
fact that FGA references have a fairly linear temperature drift
characteristic insures that the limits stated will not be exceeded
over the temperature range.
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.
ISL21070 Used as a Low Cost Precision
Current Source
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.
Using an N-JET and the ISL21070, 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.
VOUT
+8V TO 28V
ISET =
RSET
IL = ISET + IRSET
VIN
VOUT
RSET
0.01μF
1kΩ
0.1%
10ppm/°C
ISL21070-2.5
VOUT = 2.5V
ZOUT > 100MΩ
GND
ISY ~ 11μA
ISET
IL AT 0.1% ACCURACY
~2.5011mA
FIGURE 17. ISL21070 USED AS A LOW COST PRECISION CURRENT
SOURCE
FN7599.2
July 1, 2011
8
ISL21070
Typical Application Circuits
VIN = 3.0V
R = 200Ω
2N2905
VIN
VOUT
2.5V/50mA
ISL21070
GND
0.001μF
FIGURE 18. PRECISION 2.5V 50mA REFERENCE
2.7V TO 5.5V
0.1μF
10μF
VIN
VOUT
ISL21070
GND
0.001μF
VCC
X9119
RH
VOUT
+
–
SDA
SCL
2-WIRE BUS
VOUT
(BUFFERED)
VSS
RL
FIGURE 19. 2.5V FULL SCALE LOW-DRIFT 10-BIT ADJUSTABLE VOLTAGE SOURCE
2.7V TO 5.5V
0.1μF
10μF
VIN
+
–
V
OUT SENSE
LOAD
VOUT
ISL21070
GND
FIGURE 20. KELVIN SENSED LOAD
FN7599.2
July 1, 2011
9
ISL21070
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
FN7599.2
CHANGE
4/4/11
Converted to New Intersil Template
Updated page 1 description (removed 3.3V from last paragraph)
Updated “Features” on page 1 as follows:
-Removed 3.3V from Reference Output Voltage bullet.
-Removed "Initial Accuracy: 3.3V from 2.5V...±0.2% option"
-Removed “ISL21070-33 (Coming Soon)” under Input Voltage Range bullet
Updated “Ordering Information” on page 2 as follows:
-Removed ISL21070CIH333Z-TK 3.3V option
Updated “Electrical Specification” as follows:
-Removed 3.3V option electrical specification header and table
Updated Parameters Note in Electrical spec from “parameters...” to “compliance...”
8/19/10
FN7599.1
Added product variation for 0.6V and 2.048V. Removed 1.024V coming soon part. Updated throughout
accordingly as follows:
Updated page 1 description (removed 1.024V from last paragraph and added 0.6V)
Updated “Features” on page 1 as follows:
-removed 1.024V from Reference Output Voltage bullet. Added 0.600V.
-removed "Initial Accuracy: 1.024V . . .±0.5%" and added "Initial Accuracy: 0.600V . . ±1.0%"
-removed "Coming Soon" from ISL21070-20 under Input Voltage Range bullet. Also, removed ISL21070-10
(coming soon) part and added ISL21070-06 part.
-added "Tempco (0.600V only). . . . . 50ppm/°C"
-added "all others" to "Tempco (all others) . . . 30ppm/°C"
Updated “Ordering Information” on page 2 to add ISL21070DIH306Z-TK 0.6V option. Removed 1.024V option
ISL21070CIH310Z-TK
Added Note 4 to Part Marking column of “Ordering Information” on page 2.
-Added "Electrical Specifications (ISL21070-06, VOUT = 0.600V)" table to page 3 and "Electrical Specifications
(ISL21070-20, VOUT = 2.048V)" table to page 3
-Removed "Electrical Specifications (ISL21070-xx, VOUT = 1.024V to 2.048V)" table
Added Theta JC of 110 to “Thermal Information” on page 3. Added applicable Theta JC Note 7 (“For θ , the
JC
“case temp” location is taken at the package top center.”)
Revised Theta JA in “Thermal Information” on page 3 from 371 to 275
Added Figure 16. “VOUT NOISE, 0.1Hz TO 10Hz” to page 7.
3/19/10
FN7599.0
Initial release.
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: ISL21070
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
FN7599.2
July 1, 2011
10
ISL21070
Package Outline Drawing
P3.064
3 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE (SOT23-3)
Rev 2, 9/09
4
2.92±0.12
DETAIL "A"
C
L
2.37±0.27
1.30±0.10
4
C
L
0.950
0.435±0.065
0.20 M C
0 - 8 deg.
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.
(1.25)
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.
(0.95 typ.)
TYPICAL RECOMMENDED LAND PATTERN
FN7599.2
July 1, 2011
11
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