AD1580ART-REEL [ADI]
1.2 V Micropower, Precision Shunt Voltage Reference; 1.2 V微功耗，精密并联型电压基准
| 型号： | AD1580ART-REEL |
| 厂家： | 
ADI |
| 描述： | 1.2 V Micropower, Precision Shunt Voltage Reference |
| 文件： | 总12页 (文件大小：368K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
1.2 V Micropower, Precision
Shunt Voltage Reference
AD1580
PIN CONFIGURATIONS
FEATURES
Wide operating range: 50 µA to 10 mA
Initial accuracy: 0.1% maximum
Temperature drift: 50 ppm/°C maximum
Output impedance: 0.5 Ω maximum
Wideband noise (10 Hz to 10 kHz): 20 µV rms
Operating temperature range: −40°C to +85°C
High ESD rating
AD1580
AD1580
V+
V–
1
V–
V+
1
3
NC (OR V–)
3 NC (OR V–)
2
2
TOP VIEW
TOP VIEW
NC = NO CONNECT
NC = NO CONNECT
Figure 1. SOT-23
Figure 2. SC70
4 kV human body model
400 V machine model
Compact, surface-mount SOT-23 and SC70 packages
50
45
40
35
30
25
20
15
10
5
APPLICATIONS
Portable, battery-powered equipment
Cellular phones, notebook computers, PDAs, GPSs,
and DMMs
Computer workstations
Suitable for use with a wide range of video RAMDACs
Smart industrial transmitters
PCMCIA cards
Automotive
3 V/5 V, 8-bit to 12-bit data converters
0
–40
–30
–20
–10
0
10
20
30
40
TEMPERATURE DRIFT (ppm/°C)
GENERAL DESCRIPTION
Figure 3. Reverse Voltage Temperature Drift Distribution
The AD15801 is a low cost, 2-terminal (shunt), precision band
gap reference. It provides an accurate 1.225 V output for input
currents between 50 μA and 10 mA.
300
250
200
150
100
50
The superior accuracy and stability of the AD1580 is made
possible by the precise matching and thermal tracking of
on-chip components. Proprietary curvature correction
design techniques have been used to minimize the nonli-
nearities in the voltage output temperature characteristics.
The AD1580 is stable with any value of capacitive load.
The low minimum operating current makes the AD1580
ideal for use in battery-powered 3 V or 5 V systems. However,
the wide operating current range means that the AD1580 is
extremely versatile and suitable for use in a wide variety of
high current applications.
0
–10
–8
–6
–4
–2
0
2
4
6
8
10
OUTPUT ERROR (mV)
Figure 4. Reverse Voltage Error Distribution
The AD1580 is available in two grades, A and B, both of which
are provided in the SOT-23 and SC70 packages, the smallest
surface-mount packages available. Both grades are specified
over the industrial temperature range of −40°C to +85°C.
1 Protected by U.S. Patent No. 5,969,657.
Rev. F
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2003-2011 Analog Devices, Inc. All rights reserved.
AD1580
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description......................................................................... 1
Pin Configurations ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Typical Performance Characteristics ............................................. 5
Theory of Operation ........................................................................ 6
Applying the AD1580 .................................................................. 6
Temperature Performance........................................................... 6
Voltage Output Nonlinearity vs. Temperature ..........................7
Reverse Voltage Hysteresis...........................................................7
Output Impedance vs. Frequency...............................................7
Noise Performance and Reduction.............................................8
Turn-On Time ...............................................................................8
Transient Response .......................................................................9
Precision Micropower Low Dropout Reference .......................9
Using the AD1580 with 3 V Data Converters ...........................9
Outline Dimensions....................................................................... 11
Ordering Guide .......................................................................... 12
Package Branding Information ................................................ 12
REVISION HISTORY
7/11—Rev. E to Rev. F
Changes to Ordering Guide .......................................................... 12
Updated Outline Dimensions....................................................... 11
Changes to Ordering Guide.......................................................... 12
7/11—Rev. D to Rev. E
Updated Outline Dimensions ....................................................... 11
Changes to Ordering Guide .......................................................... 12
7/04—Rev. A to Rev. B
Changes to Ordering Guide.............................................................2
1/08—Rev. C to Rev. D
10/03—Rev. 0 to Rev. A
Changes to Figure 5.......................................................................... 5
Changes to Figure 6 Caption........................................................... 5
Changes to Ordering Guide .......................................................... 12
Renumbered Figures and TPCs........................................Universal
Edits to Features.................................................................................1
Edits to General Description ...........................................................1
Edits to Ordering Guide ...................................................................2
Updated Figures 5 Through 7..........................................................4
Updated Outline Dimensions..........................................................8
7/06—Rev. B to Rev. C
Updated Format..................................................................Universal
Changes to Figure 13........................................................................ 7
Changes to Figure 16........................................................................ 8
Rev. F | Page 2 of 12
AD1580
SPECIFICATIONS
TA = 25°C, IIN = 100 µA, unless otherwise noted.
Table 1.
AD1580A
Typ
AD1580B
Typ
Model
Min
Max
Min
Max
Unit
V
REVERSE VOLTAGE OUTPUT (SOT-23)
REVERSE VOLTAGE OUTPUT (SC70)
REVERSE VOLTAGE TEMPERATURE DRIFT
−40°C to +85°C
1.215
1.225
1.235
1.224
1.2225
1.225
1.226
1.2275
1.225
V
100
50
50
50
ppm/°C
μA
MINIMUM OPERATING CURRENT, TMIN to TMAX
REVERSE VOLTAGE CHANGE WITH REVERSE CURRENT
50 μA < IIN < 10 mA, TMIN to TMAX
50 μA < IIN < 1 mA, TMIN to TMAX
DYNAMIC OUTPUT IMPEDANCE (∆VR/ΔIR)
IIN = 1 mA 100 μA (f = 120 Hz)
OUTPUT NOISE
2.5
0.5
6
1
2.5
0.5
6
mV
mV
0.4
0.4
0.5
Ω
RMS Noise Voltage: 10 Hz to 10 kHz
Low Frequency Noise Voltage: 0.1 Hz to 10 Hz
TURN-ON SETTLING TIME TO 0.1%1
OUTPUT VOLTAGE HYSTERESIS2
TEMPERATURE RANGE
20
5
20
5
μV rms
μV p-p
µs
5
5
80
80
µV
Specified Performance, TMIN to TMAX
Operating Range3
−40
−55
+85
+125
−40
−55
+85
+125
°C
°C
1 Measured with no load capacitor.
2 Output hysteresis is defined as the change in the +25°C output voltage after a temperature excursion to +85°C and then to −40°C.
3 The operating temperature range is defined as the temperature extremes at which the device continues to function. Parts may deviate from their specified
performance.
Rev. F | Page 3 of 12
AD1580
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Reverse Current
Forward Current
Internal Power Dissipation1
SOT-23 (RT)
Storage Temperature Range
Operating Temperature Range
AD1580/RT
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Rating
25 mA
20 mA
0.3 W
−65°C to +150°C
−55°C to +125°C
ESD CAUTION
Lead Temperature, Soldering
Vapor Phase (60 sec)
Infrared (15 sec)
215°C
220°C
ESD Susceptibility2
Human Body Model
Machine Model
4 kV
400 V
1 Specification is for device in free air at 25°C, SOT-23 package. θJA = 300°C/W.
2 The human body model is a 100 pF capacitor discharged through 1.5 kΩ. For
the machine model, a 200 pF capacitor is discharged directly into the device.
Rev. F | Page 4 of 12
AD1580
TYPICAL PERFORMANCE CHARACTERISTICS
1000
100
80
60
40
20
0
500
0
–500
–1000
–1500
–2000
+85°C
+25°C
0.6
–40°C
1.2
0
0.2
0.4
0.8
1.0
1.4
–55
–35
–15
5
25
45
65
85
105
125
TEMPERATURE (°C)
REVERSE VOLTAGE (V)
Figure 5. Output Drift for Different Temperature Characteristics
Figure 8. Reverse Current vs. Reverse Voltage
4
3
1.0
0.8
0.6
0.4
0.2
0
+25°C
–40°C
T
= +125°C
+85°C
A
2
1
T
= –40°C TO +85°C
A
0
–1
0.01
0.1
1
10
0.01
0.1
1
10
100
REVERSE CURRENT (mA)
FORWARD CURRENT (mA)
Figure 6. Reverse Voltage Change vs. Reverse Current
Figure 9. Forward Voltage vs. Forward Current
600
400
200
1.0
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
Figure 7. Noise Spectral Density
Rev. F | Page 5 of 12
AD1580
THEORY OF OPERATION
The AD1580 uses the band gap concept to produce a stable,
low temperature coefficient voltage reference suitable for high
accuracy data acquisition components and systems. The device
makes use of the underlying physical nature of a silicon tran-
sistor base emitter voltage in the forward biased operating
region. All such transistors have an approximately −2 mV/°C
temperature coefficient (TC), which is unsuitable for use
directly as a low TC reference; however, extrapolation of
the temperature characteristic of any one of these devices to
absolute zero (with collector current proportional to absolute
temperature) reveals that its VBE goes to approximately the
silicon band gap voltage. Thus, if a voltage could be developed
with an opposing temperature coefficient to sum with VBE, a
zero TC reference would result. The AD1580 circuit in Figure 10
provides such a compensating voltage, V1, by driving two
transistors at different current densities and amplifying the
resultant VBE difference (∆VBE, which has a positive TC).
The sum of VBE and V1 provides a stable voltage reference.
V+
Figure 12 shows a typical connection of the AD1580BRT
operating at a minimum of 100 µA. This connection can
provide 1 mA to the load while accommodating 10%
power supply variations.
V
S
R
I + I
R L
S
I
L
V
R
I
R
V
OUT
Figure 11. Typical Connection Diagram
+5V(+3V) ±10%
2.94kΩ
(1.30kΩ)
R
S
V
R
V
OUT
Figure 12. Typical Connection Diagram
V1
TEMPERATURE PERFORMANCE
The AD1580 is designed for reference applications where stable
temperature performance is important. Extensive temperature
testing and characterization ensure that the device’s performance is
maintained over the specified temperature range.
ΔV
BE
Some confusion exists in the area of defining and specifying
reference voltage error over temperature. Historically, references
have been characterized using a maximum deviation per degree
Celsius, for example, 50 ppm/°C. However, because of nonlinear-
ities in temperature characteristics that originated in standard
Zener references (such as S type characteristics), most manufac-
turers now use a maximum limit error band approach to specify
devices. This technique involves the measurement of the output
at three or more different temperatures to guarantee that the
voltage falls within the given error band. The proprietary
curvature correction design techniques used to minimize the
AD1580 nonlinearities allow the temperature performance to
be guaranteed using the maximum deviation method. This
method is of more use to a designer than the one that simply
guarantees the maximum error band over the entire temper-
ature change.
V
BE
V–
Figure 10. Schematic Diagram
APPLYING THE AD1580
The AD1580 is simple to use in virtually all applications. To
operate the AD1580 as a conventional shunt regulator (see
Figure 11), an external series resistor is connected between the
supply voltage and the AD1580. For a given supply voltage, the
series resistor, RS, determines the reverse current flowing through
the AD1580. The value of RS must be chosen to accommodate
the expected variations of the supply voltage, VS; load current,
IL; and the AD1580 reverse voltage, VR; while maintaining an
acceptable reverse current, IR, through the AD1580.
The minimum value for RS should be chosen when VS is at
its minimum and IL and VR are at their maximum, while
maintaining the minimum acceptable reverse current.
Figure 13 shows a typical output voltage drift for the AD1580
and illustrates the methodology. The maximum slope of the two
diagonals drawn from the initial output value at +25°C to the
output values at +85°C and −40°C determines the performance
grade of the device. For a given grade of the AD1580, the designer
can easily determine the maximum total error from the initial
tolerance plus temperature variation.
The value of RS should be large enough to limit IR to 10 mA
when VS is at its maximum and IL and VR are at their minimum.
The equation for selecting RS is as follows:
RS = (VS − VR)/(IR + IL)
Rev. F | Page 6 of 12
AD1580
1.2258
1.2256
1.2254
1.2252
1.2250
1.2248
1.2246
1.2244
1.2242
1.2240
1.2238
REVERSE VOLTAGE HYSTERESIS
(V
MAX
– V )
O
SLOPE = TC =
–6
(+85°C – +25°C) × 1.225 × 10
A major requirement for high performance industrial
equipment manufacturers is a consistent output voltage at
nominal temperature following operation over the operating
temperature range. This characteristic is generated by measur-
ing the difference between the output voltage at +25°C after
operation at +85°C and the output, at +25°C after operation
at −40°C. Figure 15 displays the hysteresis associated with the
AD1580. This characteristic exists in all references and has been
minimized in the AD1580.
V
MAX
V
O
(V
MIN
– V )
O
SLOPE = TC =
–6
(–40°C – +25°C) × 1.225 × 10
40
V
MIN
–55
–35
–15
5
25
45
65
85
105
125
35
30
25
20
15
10
5
TEMPERATURE (°C)
Figure 13. Output Voltage vs. Temperature
For example, the AD1580BRT initial tolerance is 1 mV;
a
50 ppm/°C temperature coefficient corresponds to an
error band of 4 mV (50 × 10−6 × 1.225 V × 65°C). Thus, the
unit is guaranteed to be 1.225 V 5 mV over the operating
temperature range.
Duplication of these results requires a combination of high
accuracy and stable temperature control in a test system.
Evaluation of the AD1580 produces a curve similar to that
in Figure 5 and Figure 13.
0
–400 –300 –200 –100
0
100
200
300
400
HYSTERESIS VOLTAGE (µV)
Figure 15. Reverse Voltage Hysteresis Distribution
VOLTAGE OUTPUT NONLINEARITY vs.
TEMPERATURE
OUTPUT IMPEDANCE vs. FREQUENCY
When a reference is used with data converters, it is important to
understand how temperature drift affects the overall converter
performance. The nonlinearity of the reference output drift
represents an additional error that is not easily calibrated out of
the system. This characteristic (see Figure 14) is generated by
normalizing the measured drift characteristic to the end point
average drift. The residual drift error of approximately 500 ppm
shows that the AD1580 is compatible with systems that require
10-bit accurate temperature performance.
Understanding the effect of the reverse dynamic output imped-
ance in a practical application may be important to successfully
apply the AD1580. A voltage divider is formed by the AD1580
output impedance and the external source impedance. When
an external source resistor of about 30 kΩ (IR = 100 μA) is used,
1% of the noise from a 100 kHz switching power supply is devel-
oped at the output of the AD1580. Figure 16 shows how a 1 µF
load capacitor connected directly across the AD1580 reduces
the effect of power supply noise to less than 0.01%.
1k
600
500
400
300
200
100
0
100
C
= 0
L
10
1
ΔI = 0.1I
R
R
I
= 100µA
R
C
= 1µF
L
I
= 1mA
R
0.1
10
–55
–35
–15
5
25
45
65
85
105
125
100
1k
10k
100k
1M
TEMPERATURE (°C)
FREQUENCY (Hz)
Figure 14. Residual Drift Error
Figure 16. Output Impedance vs. Frequency
Rev. F | Page 7 of 12
AD1580
Upon application of power (cold start), the time required for
the output voltage to reach its final value within a specified
error is the turn-on settling time. Two components normally
associated with this are time for active circuits to settle and time
for thermal gradients on the chip to stabilize. This characteristic
is generated from cold start operation and represents the true
turn-on waveform after power-up. Figure 21 shows both the
coarse and fine turn-on settling characteristics of the device;
the total settling time to within 1.0 mV is about 6 µs, and there
is no long thermal tail when the horizontal scale is expanded to
2 ms/div.
NOISE PERFORMANCE AND REDUCTION
The noise generated by the AD1580 is typically less than
5 µV p-p over the 0.1 Hz to 10 Hz band. Figure 17 shows the
0.1 Hz to 10 Hz noise of a typical AD1580. Noise in a 10 Hz to
10 kHz bandwidth is approximately 20 μV rms (see Figure 18a).
If further noise reduction is desired, a 1-pole low-pass filter can
be added between the output pin and ground. A time constant
of 0.2 ms has a −3 dB point at about 800 Hz and reduces the
high frequency noise to about 6.5 μV rms (see Figure 18b).
A time constant of 960 ms has a −3 dB point at 165 Hz and
reduces the high frequency noise to about 2.9 μV rms (see
Figure 18c).
2.4V
V
0V
IN
4.5µV p-p
C
= 200pF
L
250mV/DIV
5µs/DIV
1µV/DIV
1s/DIV
Figure 19. Turn-On Response Time
Figure 17. 0.1 Hz to 10 Hz Voltage Noise
R
R
= 11.5kΩ
L
S
+
40µV/DIV
21µV rms
V
IN
V
R
C
V
OUT
L
–
(a)
(b)
(c)
Figure 20. Turn-On, Settling, and Transient Test Circuit
Output turn-on time is modified when an external noise
reduction filter is used. When present, the time constant
of the filter dominates overall settling.
20µV/DIV
6.5µV rms, τ = 0.2ms
2.4V
2.90µV rms, τ = 960ms
10µV/DIV
10ms/DIV
V
0V
IN
OUTPUT ERROR
1mV/DIV, 2µs/DIV
Figure 18. Total RMS Noise
TURN-ON TIME
Many low power instrument manufacturers are becoming
increasingly concerned with the turn-on characteristics of
components being used in their systems. Fast turn-on compo-
nents often enable the end user to keep power off when not
needed, and yet those components respond quickly when
the power is turned on for operation. Figure 19 displays the
turn-on characteristic of the AD1580.
OUTPUT
0.5mV/DIV, 2ms/DIV
Figure 21. Turn-On Settling
Rev. F | Page 8 of 12
AD1580
TRANSIENT RESPONSE
PRECISION MICROPOWER LOW DROPOUT
REFERENCE
Many ADC and DAC converters present transient current
loads to the reference. Poor reference response can degrade
the converter’s performance.
The circuit in Figure 24 provides an ideal solution for making
a stable voltage reference with low standby power consumption,
low input/output dropout capability, and minimum noise output.
The amplifier both buffers and optionally scales up the AD1580
output voltage, VR. Output voltages as high as 2.1 V can supply
1 mA of load current. A one-pole filter connected between the
AD1580 and the OP193 input can be used to achieve low output
noise. The nominal quiescent power consumption is 200 µW.
Figure 22 displays both the coarse and fine settling characteristics
of the device to load transients of 50 μA.
20mV/DIV
1mV/DIV
I
= 100µA + 50µA STEP
R
3V
(a)
(b)
34.8kΩ
205Ω
OP193
V
= +1.225V
OUT
OR
4.7µF
V
= +1.225 (1 + R2/R3)
OUT
I
= 100µA – 50µA STEP
1µs/DIV
R
R2
R3
AD1580
1mV/DIV
20mV/DIV
Figure 22. Transient Settling
Figure 24. Micropower Buffered Reference
Figure 22a shows the settling characteristics of the device for
an increased reverse current of 50 μA. Figure 22b shows the
response when the reverse current is decreased by 50 µA.
The transients settle to 1 mV in about 3 µs.
USING THE AD1580 WITH 3 V DATA CONVERTERS
The AD1580 low output drift (50 ppm/°C) and compact submi-
niature SOT-23 package make it ideally suited for today’s high
performance converters in space critical applications.
Attempts to drive a large capacitive load (in excess of 1000 pF) may
result in ringing, as shown in the step response (see Figure 23).
This is due to the additional poles formed by the load capacit-
ance and the output impedance of the reference. A recommended
method of driving capacitive loads of this magnitude is shown
in Figure 20. A resistor isolates the capacitive load from the
output stage, while the capacitor provides a single-pole low-pass
filter and lowers the output noise.
One family of ADCs for which the AD1580 is well suited is the
AD7714-3 and AD7715-3. The AD7714/AD7715 are charge-
balancing ( ∑-∆) ADCs with on-chip digital filtering intended for
the measurement of wide dynamic range, low frequency signals
such as those representing chemical, physical, or biological
processes. Figure 25 shows the AD1580 connected to the
AD7714-3/AD7715-3 for 3 V operation.
3V
2.0V
34.8kΩ
AD7714-3 AND AD7715–3
V
IN
REFIN(+)
1.8V
R
SW
5kΩ (TYP)
HIGH
IMPEDANCE
>1GΩ
AD1580
REFIN(–)
C
REF
(3pF TO 8pF)
SWITCHING
FREQUENCY DEPENDS
ON fCLKIN
C
= 0.01µF
L
Figure 25. Reference Circuit for the AD7714-3 and AD7715-3
10mV/DIV
50µs/DIV
Figure 23. Transient Response with Capacitive Load
Rev. F | Page 9 of 12
AD1580
3.3V
V
The AD1580 is ideal for creating the reference level to use with 12-bit
multiplying DACs, such as the AD7943, AD7945, and AD7948.
In the single-supply bias mode (see Figure 26), the impedance
seen looking into the IOUT2 terminal changes with DAC code. If
the AD1580 drives IOUT2 and AGND directly, less than 0.2 LSBs
of additional linearity error results. The buffer amp eliminates
any linearity degradation that could result from variations in
the reference level.
RBF
DD
C1
I
I
OUT1
V
REF
V
A1
DAC
V
IN
OUT
OUT2
AGND
AD7943/
AD7945/
AD7948
A1: OP295
AD822
OP2283
DGND
3.3V
41.2kΩ
A1
AD1580
SIGNAL GROUND
Figure 26. Single-Supply System
Rev. F | Page 10 of 12
AD1580
OUTLINE DIMENSIONS
3.04
2.90
2.80
1.40
1.30
3
2.20
2.00
1.80
1.20
2.64
2.10
1.35
1.25
1.15
1
2
2.40
2.10
1.80
3
0.60
0.45
1
2
1.03
0.89
2.05
1.78
1.02
0.95
0.88
0.65 BSC
0.54
REF
0.40
0.10
GAUGE
PLANE
1.12
0.89
1.00
0.80
1.10
0.80
0.100
0.013
0.180
0.085
0.30
0.20
0.10
0.26
0.10
0.51
0.37
0.40
0.25
SEATING
PLANE
SEATING
PLANE
0.10 MAX
COPLANARITY
0.10
0.25
0.60 MAX
0.30 MIN
COMPLIANT TO JEDEC STANDARDS TO-236-AB
ALL DIMENSIONS COMPLIANT WITH EIAJ SC70
Figure 27. 3-Lead Small Outline Transistor Package [SOT-23-3]
Figure 28. 3-Lead Thin Shrink Small Outline Transistor Package [SC70]
(RT-3)
(KS-3)
Dimensions shown in millimeters
Dimensions shown in millimeters
7” REEL 100.00
OR
4.10
1.10
4.00
1.00
3.90
14.40 MIN
13” REEL 330.00
1.55
1.50
1.45
1.10
1.00
0.90
2.05
2.00
1.95
0.90
0.35
0.30
0.25
1.50 MIN
7” REEL 50.00 MIN
2.80
13.20
13.00
12.80
OR
20.20
MIN
8.30
8.00
7.70
13” REEL 100.00 MIN
2.70
2.60
3.55
3.50
3.45
0.75 MIN
3.20
3.10
2.90
1.00 MIN
9.90
8.40
6.90
DIRECTION OF UNREELING
Figure 29. Tape and Reel Dimensions
(RT-3 and KS-3)
Dimensions shown in millimeters
Rev. F | Page 11 of 12
AD1580
ORDERING GUIDE
Temperature
Range
Initial Output Temperature
Package
Description
Package
Option
Model1
Error
10 mV
10 mV
10 mV
1 mV
Coefficient
100 ppm/°C
100 ppm/°C
100 ppm/°C
50 ppm/°C
50 ppm/°C
50 ppm/°C
50 ppm/°C
50 ppm/°C
Branding
0Axx
R0Y
R0Y
0Bxx
R2E
R2E
R2E
R2E
AD1580ART-REEL
AD1580ARTZ-REEL
AD1580ARTZ-REEL7
AD1580BRT-REEL7
AD1580BRTZ-R2
AD1580BRTZ-REEL7
AD1580BKSZ-REEL
AD1580BKSZ-REEL7
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
3-Lead SOT-23-3
3-Lead SOT-23-3
3-Lead SOT-23-3
3-Lead SOT-23-3
3-Lead SOT-23-3
3-Lead SOT-23-3
3-Lead SC70
RT-3
RT-3
RT-3
RT-3
RT-3
RT-3
KS-3
KS-3
1 mV
1 mV
2.5 mV
2.5 mV
3-Lead SC70
1 Z = RoHS Compliant Part.
PACKAGE BRANDING INFORMATION
In the SOT-23 package (RT), four marking fields identify the device generic, grade, and date of processing.
The first field is the product identifier. A 0 identifies the generic as the AD1580.
The second field indicates the device grade: A or B.
In the third field, a numeral or letter indicates a calendar year: 5 for 1995, A for 2001.
In the fourth field, letters A through Z represent a two-week window within the calendar year, starting with A for the first two weeks of
January.
©2003-2011 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D00700-0-7/11(F)
Rev. F | Page 12 of 12
相关型号：
AD1580BRT-REEL
1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.225 V, PDSO3, TO-236AB, SOT-23, 3 PIN
ROCHESTER
AD1580BRT-REEL
IC 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.225 V, PDSO3, TO-236AB, SOT-23, 3 PIN, Voltage Reference
ADI
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