1
SEMICONDUCTORS
DESCRIPTION
TheZRT100isamonolithicintegratedcircuitproviding
a precise stable reference voltage of 9.8V at 500µA.
The circuit features a knee current of 150µA and
operation over a wide range of temperatures and
currents.
The ZRT100 is available in a SOT223 package for
surface mount applications. This device offers a trim
facility whereby the output voltage can be adjusted as
shown in Fig.1. This facility is used when
compensating for system errors or setting the
reference output to a particular value. When the trim
facilityisnotused,thepin shouldbeleftopencircuit.
FEATURES
•Trimmable output
•Excellent temperature stability
•Low output noise figure
•Available in two temperature ranges
•1 and 2% initial voltage tolerance versions
available
•No external stabilising capacitor required in most
cases
•Low slope resistance
•SOT223 small outline package
ZRT100
ISSUE 3 - DECEMBER 2003
9.8V LOW POWER PRECISION REFERENCE SOURCE
DEVICE TOL% OPERATING
TEMP. PACKAGE PARTMARK
ZRT100GC2 2 -40 to 85°C SOT223 ZRT100C2
ZRT100GC1 1 -40 to 85°C SOT223 ZRT100C1
ZRT100GA1 1 -55 to 125°C SOT223 ZRT100A1
ORDERING INFORMATION
A grade -55°C to 125°C
C grade -40°C to 85°C
SOT223
Package suffix G
Top view (pin 4 floating or
connected to pin 2)
SOT223
ZRT100
SEMICONDUCTORS
ISSUE 3 - DECEMBER 2003
2
SYMBOL PARAMETER INITIAL
VOLTAGE
TOLERANCE %
GRADE A GRADE C UNIT
TYP MAX TYP MAX
∆VROutput voltage change over
relevant temperature
range(See note (a))
1 & 2 27.0 90.0 10.8 34.4 mV
TCVROutput voltage temperature
coefficient (See note (b)) 1 & 2 15.0 50.0 15.0 50.0 ppm/°C
TEMPERATURE DEPENDENT ELECTRICAL CHARACTERISTICS
PARAMETER SYMBOL LIMIT UNIT
Reverse current (1) 30 mA
Operating temperature:
A grade
C grade
TOMP -55 to 125
-40 to 85 °C
°C
Storage temperature TSTG -55 to 150 °C
ABSOLUTE MAXIMUM RATINGS
(1) Above 25°C this figure should be linearly derated to 6mA at 125°C
PACKAGE VALUE UNIT
SOT223 2 W
POWER DISSIPATION (at Tamb = 25°C unless otherwise stated)
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
VROutput voltage
1% tolerance (A1,C1)
2% tolerance (C2) IR=500A9.70
9.60 9.80
9.80 9.90
10.00 V
V
⌬VTRIM Output voltage adjustment range RT=100k⍀⫾5%
TC⌬VTRIM Change in TCVRwith output adjustment 5.0 ppm/°C/%
IROperating current range See note (c) 0.15 30 mA
ton
toff Turn-on time
Turn-off time RL=1k⍀400
0.3 s
enp-p Output voltage noise
(over the range 0.1 to 10Hz) Peak to peak
measurement 50 V
RSSlope resistance IR= 0.5mA to
5mA
See note (d)
1.8 4.0 ⍀
ELECTRICAL CHARACTERISTICS (at Tamb = 25°C unless otherwise stated)
NOTES:
(a) Output change with temperature
The absolute maximum difference between the
maximum output voltage and the minimum output
voltage over the specified temperature range:
⌬
VR=Vmax-Vmin
(b) Output temperature coefficient (TCVR)
The ratio of the output change with temperature to the
specified temperature range expressed in ppm/°C:
TV Vx
VxTppm C
CR R
R
=°
∆
∆
106
⌬T= Full temperature range
(c) Operating current (IR)
Maximum operating current must be derated as
indicated in maximum ratings.
(d) Slope resistance (RS)
The slope resistance is defined as:
RchangeinV
specificcurrent range
SR
=
⌬
I=5-0.5=4.5mA (typically)
(e) Line regulation
The ratio of change in output voltage to the change in
input voltage producing it:
Rx
VxR V
S
R SOURCE
100 %/
ZRT100
SEMICONDUCTORS
ISSUE 3 - DECEMBER 2003
3
TYPICAL CHARACTERISTICS
Figure 1:
This circuit will allow the reference to be trimmed over
a wide range. The device is specified over a ⫾5% trim
range.
ZRT100
SEMICONDUCTORS
ISSUE 3 - DECEMBER 2003
4
SCHEMATIC DIAGRAM
ZRT100
SEMICONDUCTORS
ISSUE 3 - DECEMBER 2003
5
Europe
Zetex plc
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Oldham, OL9 8NP
United Kingdom
Telephone (44) 161 622 4444
Fax: (44) 161 622 4446
hq@zetex.com
Zetex GmbH
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Germany
Telefon: (49) 89 45 49 49 0
Fax: (49) 89 45 49 49 49
europe.sales@zetex.com
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Hauppauge, NY 11788
USA
Telephone: (1) 631 360 2222
Fax: (1) 631 360 8222
usa.sales@zetex.com
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Telephone: (852) 26100 611
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asia.sales@zetex.com
These offices are supported by agents and distributors in major countries world-wide.
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For the latest product information, log on to www.zetex.com
© Zetex plc 2003
DIM Millimeters Inches DIM Millimeters Inches
Min Max Min Max Min Max Min Max
A – 1.80 – 0.071 e 2.30 BSC 0.0905 BSC
A1 0.02 0.10 0.0008 0.004 e1 4.60 BSC 0.181 BSC
b 0.66 0.84 0.026 0.033 E 6.70 7.30 0.264 0.287
b2 2.90 3.10 0.114 0.122 E1 3.30 3.70 0.130 0.146
C 0.23 0.33 0.009 0.013 L 0.90 – 0.0355 –
D 6.30 6.70 0.248 0.264 ––––
PACKAGE DIMENSIONS
Controlling dimensions are in millimeters. Approximate conversions are given in inches
PACKAGE OUTLINE
