FT185-1.2/
FT285-1.2/FT385-1.2
Micropower Voltage Reference
Micropower Voltage
Equivalent LT185-1.2/
LT285-1.2/LT385-1.2
Reference
Features
s
s
s
s
Description
The
FT185-1.2
is a two terminal band gap reference diode
that has been designed for applications which require
precision performance with micropower operation. The
device provides guaranteed operating specifications at
currents as low as 10µA. The nominal voltage is 1.235V
with both 1% and 2% tolerances available. Some addi-
tional features are: maximum dynamic impedance of 1Ω,
low noise and excellent stability over time and tempera-
ture. Advanced design, processing and testing techniques
make
Force's FT185-1.2
a superior choice over previous
designs. A micropower 5V reference application is shown
below. For guaranteed TC, micropower references, see the
FT1034
data sheet.
10µA to 20mA Operating Range
Guaranteed
1% Initial Voltage Tolerance
Guaranteed
1Ω Dynamic Impedance
Very Low Power Consumption
Applications
s
s
s
s
Portable Meter References
Portable Test Instruments
Battery Operated Systems
Current Loop Instrumentation
Reverse Voltage Change With Current
10
OUTPUT VOLTAGE CHANGE (mV)
T
A
= 25°C
8
6
4
2
0
–2
0.01
0.1
1
10
REVERSE CURRENT (mA)
100
U
U
U
FT185-1.2/
FT285-1.2/FT385-1.2
Micropower Voltage Reference
Absolute Maximum Ratings
Operating Temperature Range
FT185-1.2...................................
–55°C to 125°C
FT285-1.2
..........................................–40°C to 85°C
FT385-1.2
.............................................. 0°C to 70°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
Reverse Breakdown Current ................................. 30mA
Forward Current ................................................... 10mA
BOTTOM VIEW
ORDER PART
NUMBER
FT185H-1.2
FT285H-1.2
FT385H-1.2
FT385BH-1.2
1
2
H PACKAGE
2-LEAD TO-46 METAL CAN
T
JMAX
= 150°C,
θ
JA
= 440°C/W,
θ
JC
= 80°C/W
(NOTE 3)
TOP VIEW
NC
1
NC
2
NC
3
4
8
7
NC
6
5
NC
(DO
NOT USE)
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 190°C/W
U
BOTTOM VIEW
Package/Order Information
W
U
ORDER PART
NUMBER
FT285Z-1.2
FT385Z-1.2
FT385BZ-1.2
Z PACKAGE
3-LEAD PLASTIC TO-92
T
JMAX
= 150°C,
θ
JA
= 160°C/W
(NOTE 3)
ORDER PART
NUMBER
FT385BS8-1.2
FT385S8-1.2
S8 PART
MARKING
3851
3851B
Ashley Crt, Henley,
Marlborough, Wilts, SN8 3RH UK
Tel: +44(0)1264 731200
Fax:+44(0)1264 731444
E-mail
sales@forcetechnologies.co.uk
www.forcetechnologies.co.uk
Unless otherwise stated in this SCD/Data sheet, Force Technologies Ltd reserve the right to make changes, without notice, in the products, Includ
-ing circuits, cells and/or software, described or contained herein in order to improve design and/or performance. Force Technologies resumes no
responsibility or liability for the use of any of these products, conveys no licence or any title under patent, copyright, or mask work to these
products, and makes no representation or warranties that that these products are free from patent, copyright or mask work infringement, unless
otherwise specified.
Life Support Applications
Force Technologies products are not designed for use in life support appliances, devices or systems where malfunction of a Force Technologies
product can reasonably be expected to result in a personal injury. Force Technologies customers using or selling Force Technologies products
for use in such applications do so at their own risk and agree to fully indemnify Force Technologies for any damages resulting from such
improper use or sale.
All trademarks acknowledged
Copyright Force Technologies Ltd 2008
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