1.

2 V Micropower, Precision
Shunt Voltage Reference
AD1580*
FEATURES PIN CONFIGURATIONS
Wide Operating Range: 50 ␮A–10 mA SOT-23 Package SC70 Package
Initial Accuracy: ⴞ0.1% Max
Temperature Drift: ⴞ50 ppm/ⴗC Max
Output Impedance: 0.5 ⍀ Max V+ 1 V– 1
Wideband Noise (10 Hz–10 kHz): 20 ␮V rms 3 NC (OR V–) 3 NC (OR V–)
Operating Temperature Range: –40ⴗC to +85ⴗC V– 2 V+ 2
TOP TOP
High ESD Rating VIEW VIEW
4 kV Human Body Model NC = NO CONNECT NC = NO CONNECT
400 V Machine Model
Compact, Surface-Mount, SOT-23 and SC70 Packages

GENERAL DESCRIPTION
The AD1580 is a low cost, 2-terminal (shunt), precision 50
bandgap reference. It provides an accurate 1.225 V output for
input currents between 50 µA and 10 mA. 45

40
The AD1580’s superior accuracy and stability is made possible
by the precise matching and thermal tracking of on-chip 35

components. Proprietary curvature correction design techniques QUANTITY

30
have been used to minimize the nonlinearities in the voltage
25
output temperature characteristics. The AD1580 is stable with
any value of capacitive load. 20

15
The low minimum operating current makes the AD1580 ideal
for use in battery powered 3 V or 5 V systems. However, the 10
wide operating current range means that the AD1580 is 5
extremely versatile and suitable for use in a wide variety of high
0
current applications. –40 –30 –20 –10 0 10 20 30 40
TEMPERATURE DRIFT (ppm/ⴗC)
The AD1580 is available in two grades, A and B, both of which
are provided in the SOT-23 and SC70 packages, the smallest Figure 1. Reverse Voltage Temperature Drift Distribution
surface-mount package available. Both grades are specified over
the industrial temperature range of –40°C to +85°C.
300

TARGET APPLICATIONS
1. Portable, Battery-Powered Equipment: 250
Cellular Phones, Notebook Computers, PDAs, GPSes, and
DMMs 200

2. Computer Workstations Suitable for use with a wide range of

QUANTITY

video RAMDACs 150

3. Smart Industrial Transmitters

100
4. PCMCIA Cards
5. Automotive 50

6. 3 V/5 V 8-Bit to 12-Bit Data Converters

0
–10 –8 –6 –4 –2 0 2 4 6 8 10
OUTPUT ERROR (mV)
*Protected by U.S. Patent No. 5,969,657; other patents pending.
Figure 2. Reverse Voltage Error Distribution
REV. A

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. No license is granted by implication or otherwise One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
under any patent or patent rights of Analog Devices. Trademarks and Tel: 781/329-4700 www.analog.com
registered trademarks are the property of their respective owners. Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.
AD1580–SPECIFICATIONS (@ T = 25ⴗC, I A IN = 100 ␮A, unless otherwise noted.)

AD1580A AD1580B
Model Min Typ Max Min Typ Max Unit
REVERSE VOLTAGE OUTPUT (SOT-23) 1.215 1.225 1.235 1.224 1.225 1.226 V
REVERSE VOLTAGE OUTPUT (SC70) 1.2225 1.225 1.2275 V
REVERSE VOLTAGE TEMPERATURE DRIFT
–40°C to +85°C 100 50 ppm/°C
MINIMUM OPERATING CURRENT, TMIN to TMAX 50 50 µA
REVERSE VOLTAGE CHANGE WITH REVERSE CURRENT
50 µA < IIN < 10 mA, TMIN to TMAX 2.5 6 2.5 6 mV
50 µA < IIN < 1 mA, TMIN to TMAX 0.5 0.5 mV
DYNAMIC OUTPUT IMPEDANCE (∆VR/∆IR)
IIN = 1 mA ± 100 µA (f = 120 Hz) 0.4 1 0.4 0.5 Ω
OUTPUT NOISE
RMS Noise Voltage: 10 Hz to 10 kHz 20 20 µV rms
Low Frequency Noise Voltage: 0.1 Hz to 10 Hz 5 5 µV p-p
TURN-ON SETTLING TIME TO 0.1%1 5 5 µs
OUTPUT VOLTAGE HYSTERESIS 2
80 80 µV
TEMPERATURE RANGE
Specified Performance, TMIN to TMAX –40 +85 –40 +85 °C
Operating Range3 –55 +125 –55 +125 °C
NOTES
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 will continue to function. Parts may deviate from their specified performance.
Specifications subject to change without notice.

ORDERING GUIDE
Initial
ABSOLUTE MAXIMUM RATINGS 1 Output Temperature Package
Reverse Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 mA Model Error Coefficient Option Branding
Forward Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Internal Power Dissipation2 AD1580ART-R21 10 mV 100 ppm/°C RT-3 0Axx
SOT-23 (RT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 W AD1580ART-REEL2 10 mV 100 ppm/°C RT-3 0Axx
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C AD1580ART-REEL73 10 mV 100 ppm/°C RT-3 0Axx
Operating Temperature Range AD1580BRT-R21 1 mV 50 ppm/°C RT-3 0Bxx
AD1580/RT . . . . . . . . . . . . . . . . . . . . . . . –55°C to +125°C AD1580BRT-REEL73 1 mV 50 ppm/°C RT-3 0Bxx
Lead Temperature, Soldering AD1580BKSZ-REEL4 2.5 mV 50 ppm/°C KS-3 K0B
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C NOTES
1
ESD Susceptibility3 R2 is 250 piece reel.
2
Provided on a 13-inch reel containing 10,000 pieces.
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . 4 kV 3
Provided on a 7-inch reel containing 3,000 pieces.
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 V 4
Pb-free.
NOTES
1
Stresses above those listed under “Absolute Maximum Ratings” may cause PACKAGE BRANDING INFORMATION
permanent damage to the device. This is a stress rating only and functional In the SOT-23 package (RT), four marking fields identify the
operation of the device at these or any other conditions above those indicated in the device generic, grade, and date of processing. The first field is the
operational section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability. product identifier. A 0 identifies the generic as the AD1580. The
2
Specification is for device in free air at 25°C: SOT-23 package: θJA = 300°C/W. second field indicates the device grade; A or B. In the third field
3
The human body model is a 100 pF capacitor discharged through 1.5 kΩ. For the a numeral or letter indicates a calendar year; 5 for 1995, A for
machine model, a 200 pF capacitor is discharged directly into the device. 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.
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 the
AD1580 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.

–2– REV. A
 Typical Performance Characteristics–AD1580
1000

500 600
REVERSE VOLTAGE CHANGE (ppm)

NOISE VOLTAGE (nV/ Hz)

0

400
–500
~20ppm/ C
–1000
200

–1500

–2000
–55 –35 –15 5 25 45 65 85 105 125 1.0 10 100 1k 10k 100k 1M
TEMPERATURE ( C) FREQUENCY (Hz)

TPC 1. Output Drift for Different Temperature TPC 3. Noise Spectral Density
Characteristics

4 100
REVERSE VOLTAGE CHANGE (mV)

3 80

REVERSE CURRENT (␮A)

TA = 125 C
2 60

1 40
+85 C

TA = –40 C TO +85 C
0 20 +25 C
–40 C

–1 0
0.01 0.1 1 10 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
REVERSE CURRENT (mA) REVERSE VOLTAGE (V)

TPC 2. Output Voltage Error vs. Reverse Current TPC 4. Reverse Current vs. Reverse Voltage

1.0

–40 C +25 C
0.8
FORWARD VOLTAGE (V)

+85 C
0.6

0.4

0.2

0
0.01 0.1 1 10 100
FORWARD CURRENT (mA)

TPC 5. Forward Voltage vs. Forward Current

REV. A –3–
AD1580
THEORY OF OPERATION VS +5V(+3V) ±10%

The AD1580 uses the bandgap concept to produce a stable, low

RS I R + IL 2.94kΩ
temperature coefficient voltage reference suitable for high accuracy RS
(1.30kΩ)
IL
data acquisition components and systems. The device makes use VR VR
of the underlying physical nature of a silicon transistor base emitter IR
VOUT VOUT
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 (a) (b)
devices to absolute zero (with collector current proportional to
absolute temperature) reveals that its VBE will go to approximately Figure 4. Typical Connection Diagram
the silicon bandgap voltage. Thus, if a voltage could be developed
with an opposing temperature coefficient to sum with VBE, a TEMPERATURE PERFORMANCE
zero TC reference would result. The AD1580 circuit in Figure 3 The AD1580 is designed for reference applications where
provides such a compensating voltage, V1, by driving two transistors stable temperature performance is important. Extensive
at different current densities and amplifying the resultant VBE temperature testing and characterization ensure that the device’s
difference (∆VBE, which has a positive TC). The sum of VBE and performance is maintained over the specified temperature range.
V1 provides a stable voltage reference. Some confusion exists in the area of defining and specifying
V+
reference voltage error over temperature. Historically, references
have been characterized using a maximum deviation per degree
centigrade, e.g., 50 ppm/°C. However, because of nonlinearities
in temperature characteristics that originated in standard Zener
V1 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 will fall
within the given error band. The proprietary curvature correction
design techniques used to minimize the AD1580 nonlinearities allow
∆VBE
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
VBE
V–
error band over the entire temperature change.
Figure 5 shows a typical output voltage drift for the AD1580 and
Figure 3. Schematic Diagram illustrates the methodology. The maximum slope of the two
diagonals drawn from the initial output value at +25°C to the
APPLYING THE AD1580 output values at +85°C and –40°C determines the performance
The AD1580 is simple to use in virtually all applications. To operate grade of the device. For a given grade of the AD1580, the designer
the AD1580 as a conventional shunt regulator (Figure 4a), an can easily determine the maximum total error from the initial
external series resistor is connected between the supply voltage tolerance plus temperature variation.
and the AD1580. For a given supply voltage, the series resistor, RS,
determines the reverse current flowing through the AD1580. 1.2258
(VMAX – VO)
The value of RS must be chosen to accommodate the expected 1.2256 SLOPE = TC = ———————————––––
(85ⴗ C – 25ⴗ C) ⴛ 1.225 ⴛ 10–6
variations of the supply voltage, VS, load current, IL, and the 1.2254 VMAX
AD1580 reverse voltage, VR, while maintaining an acceptable
OUTPUT VOLTAGE (V)

1.2252
reverse current, IR, through the AD1580.
1.2250
VO
The minimum value for RS should be chosen when VS is at its
1.2248
minimum and IL and VR are at their maximum—while
maintaining the minimum acceptable reverse current. 1.2246

The value of RS should be large enough to limit IR to 10 mA 1.2244

(VMIN – VO)
when VS is at its maximum and IL and VR are at their minimum. 1.2242 SLOPE = TC =
(–40ⴗC – +25ⴗC) ⴛ 1.225 ⴛ 10–6
The equation for selecting RS is as follows: 1.2240
VMIN
RS = (VS – VR )/(IR + IL ) 1.2238
–55 –35 –15 5 25 45 65 85 105 125
Figure 4b shows a typical connection of the AD1580BRT TEMPERATURE (ⴗC)

operating at a minimum of 100 µA. This connection can provide Figure 5. Output Voltage vs. Temperature
± 1 mA to the load, while accommodating ± 10% power supply
variations. 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.

–4– REV. A
 AD1580
Duplication of these results requires a combination of high accuracy OUTPUT IMPEDANCE VERSUS FREQUENCY
and stable temperature control in a test system. Evaluation of Understanding the effect of the reverse dynamic output impedance
the AD1580 will produce a curve similar to that in TPC 1 and in a practical application may be important to successfully apply
Figure 5. the AD1580. A voltage divider is formed by the AD1580’s output
impedance and the external source impedance. When an external
VOLTAGE OUTPUT NONLINEARITY VERSUS source resistor of about 30 kΩ (IR = 100 µA) is used, 1% of the
TEMPERATURE noise from a 100 kHz switching power supply is developed at
When a reference is used with data converters, it is important to the output of the AD1580. Figure 8 shows how a 1 µF load
understand how temperature drift affects the overall converter capacitor connected directly across the AD1580 reduces the
performance. The nonlinearity of the reference output drift effect of power supply noise to less than 0.01%.
represents additional error that is not easily calibrated out of the
system. This characteristic (Figure 6) is generated by normalizing 1k
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
100

OUTPUT IMPEDANCE (⍀)

accurate temperature performance. CL = 0

600

10
500
RESIDUAL DRIFT ERROR (ppm)

⌬ IR = 0.1IR
IR = 100␮A
400 CL = 1␮F
1
IR = 1mA
300

0.1
200 10 100 1k 10k 100k 1M
FREQUENCY (Hz)

100
Figure 8. Output Impedance vs. Frequency

0
NOISE PERFORMANCE AND REDUCTION
–55 –35 –15 5 25 45 65 85 105 125 The noise generated by the AD1580 is typically less than 5 µV p-p
TEMPERATURE (ⴗC) over the 0.1 Hz to 10 Hz band. Figure 9 shows the 0.1 Hz to
Figure 6. Residual Drift Error 10 Hz noise of a typical AD1580. Noise in a 10 Hz to 10 kHz
bandwidth is approximately 20 µV rms (Figure 10a). If further
REVERSE VOLTAGE HYSTERESIS noise reduction is desired, a 1-pole low-pass filter may be added
A major requirement for high performance industrial equipment between the output pin and ground. A time constant of 0.2 ms
manufacturers is a consistent output voltage at nominal temperature will have a –3 dB point at about 800 Hz, and will reduce the high
following operation over the operating temperature range. This
frequency noise to about 6.5 µV rms, (Figure 10b). A time constant
characteristic is generated by measuring the difference between
of 960 ms will have a –3 dB point at 165 Hz, and will reduce
the output voltage at +25°C after operation at +85°C and the
the high frequency noise to about 2.9 µV rms (Figure 10c).
output, at +25°C after operation at –40°C. Figure 7 displays the
hysteresis associated with the AD1580. This characteristic exists in
all references and has been minimized in the AD1580.
40

4.5␮V p-p
35

30

25
QUANTITY

20

15

10

5
1␮V/DIV 1s/DIV

0 Figure 9. 0.1 Hz–10 Hz Voltage Noise

–400 –300 –200 –100 0 100 200 300 400
HYSTERESIS VOLTAGE (␮V)

Figure 7. Reverse Voltage Hysteresis Distribution

REV. A –5–
AD1580
40␮V/DIV
Output turn-on time is modified when an external noise reduction
21␮Vrms
filter is used. When present, the time constant of the filter will
dominate overall settling.
(a)

2.4V
20␮V/DIV 6.5␮Vrms
τ = 0.2ms
VIN 0V
(b)

OUTPUT ERROR
1mV/DIV 2␮s/DIV
2.90␮Vrms
10␮V/DIV τ = 960ms
(c)

10ms/DIV

Figure 10. Total RMS Noise OUTPUT

0.5mV/DIV 2ms/DIV

TURN-ON TIME
Many low power instrument manufacturers are becoming
increasingly concerned with the turn-on characteristics of Figure 12. Turn-On Settling
components being used in their systems. Fast turn-on
components often enable the end user to keep power off it is TRANSIENT RESPONSE
when not needed and yet those components respond quickly Many A/D and D/A converters present transient current loads
when the power is turned on for operation. Figure 11a displays to the reference. Poor reference response can degrade the
the turn-on characteristic of the AD1580. Upon application of converter’s performance.
power (cold start), the time required for the output voltage to Figure 13 displays both the coarse and fine settling characteristics
reach its final value within a specified error is the turn-on of the device to load transients of ± 50 µA.
settling time. Two components normally associated with this are
time for active circuits to settle and time for thermal gradients
20mV/DIV 1mV/DIV
on the chip to stabilize. This characteristic is generated from cold
start operation and represents the true turn-on waveform after
power up. Figure 12 shows both the coarse and fine turn-on IR = 100␮A + 50␮A STEP
settling characteristics of the device; the total settling time to
within 1.0 mV is about 6 ␮s, and there is no long thermal tail (a)

when the horizontal scale is expanded to 2 ms/div.

2.4V (b)

IR = 100␮A – 50␮A STEP

0V VIN

CL = 200pF 20mV/DIV 1mV/DIV 1µs/DIV

Figure 13. Transient Settling

Figure 13a shows the settling characteristics of the device for
an increased reverse current of 50 µA. Figure 13b shows the
response when the reverse current is decreased by 50 µA. The
transients settle to 1 mV in about 3 µs.
250mV/DIV 5␮s/DIV Attempts to drive a large capacitive load (in excess of 1,000 pF)
may result in ringing, as shown in the step response photo
Figure 11a. Response Time (Figure 14). This is due to the additional poles formed by the
load capacitance and the output impedance of the reference. A
RS = 11.5k⍀ RL
recommended method of driving capacitive loads of this
magnitude is shown in Figure 11b. A resistor isolates the
VIN VR CL VOUT capacitive load from the output stage, while the capacitor
provides a single-pole low-pass filter and lowers the output noise.

Figure 11b. Turn-On, Settling, and Transient Test Circuit

–6– REV. A
 AD1580
One family of ADCs that the AD1580 is well suited for is the
2.0V AD7714-3 and AD7715-3. The AD7714/AD7715 are charge-
balancing (⌺-⌬) A/D converters with on-chip digital filtering
1.8V VIN intended for the measurement of wide dynamic range, low
frequency signals such as those representing chemical, physical,
or biological processes. Figure 16 shows the AD1580 connected
to the AD7714/AD7715 for 3 V operation.

3V
CL = 0.01␮F
34.8k⍀
REFIN(+) AD7714/AD7715–3
RSW
5k⍀ (TYP) HIGH
AD1580 IMPEDANCE
10mV/DIV 50␮s/DIV REFIN(–) >1G⍀
CREF
(3pF–8pF)

Figure 14. Transient Response with Capacitive Load SWITCHING

FREQUENCY DEPENDS
ON fCLKIN
PRECISION MICROPOWER LOW DROPOUT
REFERENCE Figure 16. Reference Circuit for the AD7714/AD7715–3
The circuit in Figure 15 provides an ideal solution for making a The AD1580 is ideal for creating the reference level to use with
stable voltage reference with low standby power consumption, 12-bit multiplying DACs such as the AD7943, AD7945, and
low input/output dropout capability, and minimum noise output. AD7948. In the single-supply bias mode (Figure 17), the
The amplifier both buffers and optionally scales up the AD1580 impedance seen looking into the IOUT2 terminal changes with
output voltage, VR. Output voltages as high as 2.1 V can supply DAC code. If the AD1580 drives IOUT2 and AGND directly,
1 mA of load current. A one-pole filter connected between the less than 0.2 LSBs of additional linearity error will result. The
AD1580 and the OP193 input may be used to achieve low output buffer amp eliminates any linearity degradation that could result
noise. The nominal quiescent power consumption is a mere 200 µW. from variations in the reference level .
3V 3.3V
34.8k⍀
205⍀
OP193 VOUT = +1.225V
OR VDD RBF
4.7␮F VOUT = +1.225 (1+R2/R3) C1
IOUT1
VREF
VIN DAC IOUT2 A1 VOUT

AD7943/ AGND A1: OP295

AD1580 R3 R2 AD7945/ AD822
AD7948 OP2283
DGND

Figure 15. Micropower Buffered Reference 3.3V

41.2k⍀
USING THE AD1580 WITH 3 V DATA CONVERTERS A1
The AD1580’s low output drift (50 ppm/°C) and compact
subminiature SOT-23 package makes it ideally suited for today’s AD1580
SIGNAL GROUND
high performance converters in space critical applications.
Figure 17. Single-Supply System

REV. A –7–
AD1580
OUTLINE DIMENSIONS

3-Lead Small Outline Transistor Package [SOT-23-3] 3-Lead Thin Shrink Small Outline Transistor Package [SC70]
(RT-3) (KS-3)
Dimensions shown in millimeters Dimensions shown in millimeters

C00700–0–10/03(A)
3.04 2.20
2.90 1.80
2.80
1.35
1.40
1.15
1.30 3
2.40
1.20 3
2.64 1.80
1 2
2.10
1 2
PIN 1
PIN 1 0.65 BSC
1.00
1.10 MAX
0.95 BSC 0.80
1.90 BSC 0.18
1.12 0.10
0.30
0.89 0.40
0.20 0.10 MAX 0.10
0.10 0.25 SEATING
0.01 0.60 0.08 PLANE
0.10 COPLANARITY
0.50 0.50
SEATING 0.30 0.40
PLANE
COMPLIANT TO JEDEC STANDARDS TO-236AB

Tape and Reel Dimensions

(RT-3 and KS-3)
Dimensions shown in millimeters

4.10 7" REEL 100.00

4.00 1.10 OR
3.90 1.00 13" REEL 330.00 14.40 MAX
1.55 2.05 0.90
1.50 2.00 0.35
1.85
1.50 1.95 0.30
1.75
0.25
1.65 1.50 MIN
2.80 20.20 13.20 7" REEL 50.00 MIN
8.30 2.70 MIN 13.00 OR
8.00 2.60 12.80 13" REEL 100.00 MIN
7.70 3.55
3.50
3.45

3.20 0.75 MIN

3.10 1.00 MIN
2.90 9.90
8.40
8.40
DIRECTION OF UNREELING

Revision History
Location Page
10/03—Data Sheet changed from 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

–8– REV. A