1.2 V Micropower, Precision
Shunt Voltage Reference
AD1580
PIN CONFIGURATIONS
FEATURES
AD1580
V+ 1
AD1580
V– 1
NC (OR V–)
3
NC (OR V–)
3
V+ 2
TOP VIEW
NC = NO CONNECT
TOP VIEW
00700-002
V– 2
00700-001
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
4 kV human body model
400 V machine model
Compact, surface-mount SOT-23 and SC70 packages
NC = NO CONNECT
Figure 1.
Figure 2.
50
45
40
APPLICATIONS
35
QUANTITY
30
25
20
15
10
00700-003
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
5
0
–40
–30
–20
–10
0
10
20
30
40
TEMPERATURE DRIFT (ppm/°C)
GENERAL DESCRIPTION
Figure 3. Reverse Voltage Temperature Drift Distribution
1
300
The AD1580 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.
150
100
50
0
–10
00700-004
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.
200
QUANTITY
The superior accuracy and stability of the AD1580 is made
possible by the precise matching and thermal tracking of onchip components. Proprietary curvature correction design
techniques have been used to minimize the nonlinearities in the
voltage output temperature characteristics. The AD1580 is
stable with any value of capacitive load.
250
–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; other patents pending.
Rev. C
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
©2006 Analog Devices, Inc. All rights reserved.
AD1580
TABLE OF CONTENTS
Features .............................................................................................. 1
Voltage Output Nonlinearity vs. Temperature ..........................7
Applications....................................................................................... 1
Reverse Voltage Hysteresis...........................................................7
General Description ......................................................................... 1
Output Impedance vs. Frequency ...............................................7
Pin Configurations ........................................................................... 1
Noise Performance and Reduction .............................................8
Revision History ............................................................................... 2
Turn-On Time ...............................................................................8
Specifications..................................................................................... 3
Transient Response .......................................................................9
Absolute Maximum Ratings............................................................ 4
Precision Micropower Low Dropout Reference .......................9
ESD Caution.................................................................................. 4
Using the AD1580 with 3 V Data Converters ...........................9
Typical Performance Characteristics ............................................. 5
Outline Dimensions ....................................................................... 11
Theory of Operation ........................................................................ 6
Ordering Guide .......................................................................... 12
Applying the AD1580 .................................................................. 6
Package Branding Information ................................................ 12
Temperature Performance........................................................... 6
REVISION HISTORY
7/06—Rev. B to Rev. C
Updated Format..................................................................Universal
Changes to Figure 13........................................................................ 7
Changes to Figure 16........................................................................ 8
Updated Outline Dimensions ....................................................... 11
Changes to Ordering Guide .......................................................... 12
10/03—Rev. 0 to Rev. A
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
7/04—Rev. A to Rev. B
Changes to Ordering Guide ............................................................ 2
Rev. C | Page 2 of 12
AD1580
SPECIFICATIONS
TA = 25°C, IIN = 100 μA, unless otherwise noted.
Table 1.
AD1580A
Model
REVERSE VOLTAGE OUTPUT (SOT-23)
REVERSE VOLTAGE OUTPUT (SC70)
REVERSE VOLTAGE TEMPERATURE DRIFT
−40°C to +85°C
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
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 HYSTERESIS 2
TEMPERATURE RANGE
Specified Performance, TMIN to TMAX
Operating Range 3
Min
1.215
Typ
1.225
AD1580B
Max
1.235
Min
1.224
1.2225
Typ
1.225
1.225
100
50
Max
1.226
1.2275
Unit
V
V
50
50
ppm/°C
μA
2.5
0.5
6
2.5
0.5
6
mV
mV
0.4
1
0.4
0.5
Ω
20
5
20
5
5
80
5
80
–40
–55
1
+85
+125
–40
–55
μV rms
μV p-p
μs
μV
+85
+125
Measured with no load capacitor.
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.
2
Rev. C | Page 3 of 12
°C
°C
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
Lead Temperature, Soldering
Vapor Phase (60 sec)
Infrared (15 sec)
ESD Susceptibility2
Human Body Model
Machine Model
Rating
25 mA
20 mA
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.
0.3 W
−65°C to +150°C
−55°C to +125°C
215°C
220°C
4 kV
400 V
1
Specification is for device in free air at 25°C: SOT-23 package: θJA = 300°C/W.
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.
2
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
Rev. C | Page 4 of 12
AD1580
TYPICAL PERFORMANCE CHARACTERISTICS
100
500
REVERSE CURRENT (µA)
80
–500
~20ppm/°C
–1000
60
40
+85°C
20
–1500
–2000
–55
–35
–15
5
25
45
65
85
105
+25°C
–40°C
0
125
0
0.2
0.4
Figure 5. Output Drift for Different Temperature Characteristics
1.0
1.2
4
1.0
3
0.8
+25°C
FORWARD VOLTAGE (V)
–40°C
TA = +125°C
1
TA = –40°C TO +85°C
0
–1
0.01
0.1
1
REVERSE CURRENT (mA)
0
0.01
10
00700-007
200
1k
10k
1
10
Figure 9. Forward Voltage vs. Forward Current
400
100
0.1
FORWARD CURRENT (mA)
600
10
0.4
0.2
Figure 6. Output Voltage Error vs. Reverse Current
1.0
+85°C
0.6
00700-009
2
1.4
Figure 8. Reverse Current vs. Reverse Voltage
00700-006
REVERSE VOLTAGE CHANGE (mV)
0.8
REVERSE VOLTAGE (V)
TEMPERATURE (°C)
NOISE VOLTAGE (nV/ Hz)
0.6
00700-008
0
00700-005
REVERSE VOLTAGE CHANGE (ppm)
1000
100k
1M
FREQUENCY (Hz)
Figure 7. Noise Spectral Density
Rev. C | Page 5 of 12
100
AD1580
THEORY OF OPERATION
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.
VS
RS
IR + IL
IL
VR
IR
VOUT
00700-011
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
transistor base emitter voltage in the forward biased operating
region. All such transistors have an approximately −2 mV/°C
temperature coefficient, 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
(ΔVBE, which has a positive TC). The sum of VBE and V1
provides a stable voltage reference.
Figure 11. Typical Connection Diagram
+5V(+3V) ±10%
RS
2.94kΩ
(1.30kΩ)
VR
V+
00700-012
VOUT
V1
Figure 12. Typical Connection Diagram
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.
VBE
V–
00700-010
ΔVBE
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.
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:
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
nonlinearities in temperature characteristics that originated in
standard Zener references (such as S type characteristics), most
manufacturers 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
temperature change.
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
RS = (VS − VR)/(IR + IL)
Rev. C | Page 6 of 12
AD1580
designer can easily determine the maximum total error from
the initial tolerance plus temperature variation.
1.2256 SLOPE = TC =
(VMAX – VO)
(+85°C – +25°C) × 1.225 × 10 –6
VMAX
1.2254
1.2252
1.2250
VO
1.2248
1.2246
1.2244
1.2242
SLOPE = TC =
40
(VMIN – VO)
(–40°C – +25°C) × 1.225 ×
10 –6
1.2240
1.2238
–55
VMIN
–35
–15
5
25
45
65
85
105
35
00700-013
OUTPUT VOLTAGE (V)
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
measuring 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.
30
125
QUANTITY
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.
VOLTAGE OUTPUT NONLINEARITY VS.
TEMPERATURE
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 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.
25
20
15
10
5
0
–400
00700-015
1.2258
REVERSE VOLTAGE HYSTERESIS
–300
–200
–100
0
100
200
300
400
HYSTERESIS VOLTAGE (µV)
Figure 15. Reverse Voltage Hysteresis Distribution
OUTPUT IMPEDANCE VS. FREQUENCY
Understanding the effect of the reverse dynamic output
impedance 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 developed 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
OUTPUT IMPEDANCE (Ω)
500
400
300
100
ΔIR = 0.1IR
IR = 100µA
CL = 1µF
1
0.1
10
–35
–15
5
25
45
65
85
105
00700-016
IR = 1mA
100
0
–55
CL = 0
10
200
00700-014
RESIDUAL DRIFT ERROR (ppm)
600
100
1k
10k
100k
FREQUENCY (Hz)
125
Figure 16. Output Impedance vs. Frequency
TEMPERATURE (°C)
Figure 14. Residual Drift Error
Rev. C | Page 7 of 12
1M
AD1580
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).
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.
2.4V
VIN
0V
4.5µV p-p
1µV/DIV
00700-017
250mV/DIV
1s/DIV
00700-019
CL = 200pF
5µs/DIV
Figure 19. Turn-On Response Time
Figure 17. 0.1 Hz to 10 Hz Voltage Noise
40µV/DIV
RL
RS = 11.5kΩ
21µV rms
VR
CL
VOUT
–
6.5µV rms, τ = 0.2ms
Figure 20. Turn-On, Settling, and Transient Test Circuit
(b)
2.90µV rms, τ = 960ms
(c)
10ms/DIV
00700-018
10µV/DIV
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.
2.4V
VIN
Figure 18. Total RMS Noise
0V
OUTPUT ERROR
1mV/DIV, 2µs/DIV
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
components 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. C | Page 8 of 12
00700-021
20µV/DIV
00700-020
+
VIN
(a)
AD1580
TRANSIENT RESPONSE
Many A/D and D/A converters present transient current loads
to the reference. Poor reference response can degrade the
converter’s performance.
Figure 22 displays both the coarse and fine settling characteristics
of the device to load transients of ±50 μA.
20mV/DIV
1mV/DIV
IR = 100µA + 50µA STEP
(a)
PRECISION MICROPOWER LOW DROPOUT
REFERENCE
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.
3V
34.8kΩ
205Ω
(b)
OP193
VOUT = +1.225V
OR
VOUT = +1.225 (1 + R2/R3)
4.7µF
1µs/DIV
R3
AD1580
R2
00700-024
1mV/DIV
20mV/DIV
00700-022
IR = 100µA – 50µA STEP
Figure 22. Transient Settling
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.
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
capacitance 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.
Figure 24. Micropower Buffered Reference
USING THE AD1580 WITH 3 V DATA CONVERTERS
The AD1580 low output drift (50 ppm/°C) and compact
subminiature SOT-23 package make it ideally suited for today’s
high performance converters in space critical applications.
One family of ADCs for which the AD1580 is well suited is the
AD7714-3 and AD7715-3. The AD7714/AD7715 are chargebalancing (∑-Δ) A/D converters 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/AD7715 for 3 V operation.
3V
2.0V
34.8kΩ
AD1580
AD7714/AD7715–3
REFIN(+)
RSW
5kΩ (TYP)
REFIN(–)
CREF
(3pF TO 8pF)
HIGH
IMPEDANCE
>1GΩ
SWITCHING
FREQUENCY DEPENDS
ON fCLKIN
CL = 0.01µF
10mV/DIV
50µs/DIV
00700-023
Figure 25. Reference Circuit for the AD7714/AD7715-3
Figure 23. Transient Response with Capacitive Load
Rev. C | Page 9 of 12
00700-025
VIN
1.8V
AD1580
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.
3.3V
VDD
RBF
C1
IOUT1
VIN
VREF
DAC
IOUT2
AD7943/
AD7945/
AD7948
AGND
A1
VOUT
A1: OP295
AD822
OP2283
DGND
3.3V
A1
AD1580
SIGNAL GROUND
Figure 26. Single-Supply System
Rev. C | Page 10 of 12
00700-026
41.2kΩ
AD1580
OUTLINE DIMENSIONS
3.04
2.90
2.80
1
1.35
1.25
1.15
2.64
2.10
2.40
2.10
1.80
3
2
1
PIN 1
PIN 1
0.95 BSC
1.90 BSC
0.50
0.30
SEATING
PLANE
2.05
2.00
1.95
8.30
8.00
7.70
1.10
1.00
0.90
1.10
1.00
0.90
3.55
3.50
3.45
1.00 MIN
2.80
2.70
2.60
SEATING
PLANE
0.30
0.20
0.10
0.26
0.10
ALL DIMENSIONS COMPLIANT WITH EIAJ SC70
Figure 27. 3-Lead Small Outline Transistor Package [SOT-23-3]
(RT-3)
Dimensions shown in millimeters
3.20
3.10
2.90
0.40
0.25
0.10 MAX
0.10 COPLANARITY
4.10
4.00
3.90
0.40
0.10
1.10
0.80
0.20
0.08
0.60
0.50
0.40
COMPLIANT TO JEDEC STANDARDS TO-236-AB
1.55
1.50
1.45
0.65 BSC
1.00
0.80
1.12
0.89
0.10
0.01
2
111505-0
3
2.20
2.00
1.80
Figure 28. 3-Lead Thin Shrink Small Outline Transistor Package [SC70]
(KS-3)
Dimensions shown in millimeters
7” REEL 100.00
OR
13” REEL 330.00
0.35
0.30
0.25
1.50 MIN
20.20
MIN
14.40 MIN
7” REEL 50.00 MIN
OR
13” REEL 100.00 MIN
13.20
13.00
12.80
0.75 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. C | Page 11 of 12
053006-0
1.40
1.30
1.20
AD1580
ORDERING GUIDE
Model
AD1580ART-R2
AD1580ART-REEL
AD1580ART-REEL7
AD1580ARTZ-REEL 1
AD1580ARTZ-REEL71
AD1580BRT-R2
AD1580BRT-REEL
AD1580BRT-REEL7
AD1580BRTZ-REEL71
AD1580BKSZ-REEL1
AD1580BKSZ-REEL71
1
Temperature
Range
−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
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
Initial Output
Error
10 mV
10 mV
10 mV
10 mV
10 mV
1 mV
1 mV
1 mV
1 mV
2.5 mV
2.5 mV
Temperature
Coefficient
Package
Description
Package
Option
Branding
100 ppm/°C
100 ppm/°C
100 ppm/°C
100 ppm/°C
100 ppm/°C
50 ppm/°C
50 ppm/°C
50 ppm/°C
50 ppm/°C
50 ppm/°C
50 ppm/°C
3-Lead SOT-23-3
RT-3
RT-3
RT-3
RT-3
RT-3
RT-3
RT-3
RT-3
RT-3
KS-3
KS-3
0Axx
0Axx
0Axx
R0Y
R0Y
0Bxx
0Bxx
0Bxx
R2E
R2E
R2E
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 SOT-23-3
3-Lead SOT-23-3
3-Lead SC70
3-Lead SC70
Z = Pb-free 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.
©2006 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
C00700-0-7/06(C)
Rev. C | Page 12 of 12
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