FT136-2.5/FT336-2.5
LM136-2.5/LM336-2.5
2.5V Reference
2.5V Reference
Equivalent to LT136-2.5/LT336-2.5
Features
s
s
s
s
Description
Guaranteed
Temperature Stability
Maximum 0.6Ω Dynamic Impedance
Adjustable for Minimum Temperature Coefficient
Wide
Operating Current Range
Applications
s
s
s
s
s
Reference for 5V Systems
8-Bit A/D and D/A Reference
Digital Voltmeters
Current Loop Measurement and Control Systems
Power
Supply Monitor
The FT136-2.5 is a general purpose shunt regulator diode
designed to operate over a wide current range while
maintaining good stability with time and temperature. The
third terminal allows either the temperature coefficient to
be minimised or the reference voltage to be adjusted
without changing the temperature coefficient. Because it
operates as a shunt regulator it can be used equally well as
a positive or negative reference.
The FT136-2.5 is available with initial tolerances as low as
1% in either a TO-46 metal can for hermetic requirements
or a low cost TO-92 plastic package.
Force's advanced design, test and process techniques
have optimised the FT136-2.5 to achieve superior perfor-
mance and reliability over previous designs. For more
demanding precision reference applications requiring very
low initial tolerance and temperature coefficients, consult
the FT1009 data sheet. A typical 2.5V reference with trim
is shown below.
Reverse Voltage Change With Current
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
2
8
6
REVERSE CURRENT (mA)
4
10
REVERSE VOLTAGE CHANGE (mV)
T
A
= 25°C
U
U
U
1
FT136-2.5/FT336-2.5
2.5V Reference
Absolute Maximum Ratings
Operating Temperature Range
FT136-2.5..................................... –55°C to 125°C
FT336-2.5 .............................................. 0°C to 70°C
Storage Temperature Range ............. .. – 65°C to 150°C
Package/Order Information
BOTTOM VIEW
ADJ
+
–
ORDER PART
NUMBER
FT136H-2.5
FT136AH-2.5
FT336H-2.5
FT336AH-2.5
H PACKAGE
3-LEAD TO-46 METAL CAN
T
JMAX
= 150°C,
θ
JA
= 440°C/W
(NOTE 2)
Electrical Characteristics
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
FT136/FT136A
MIN
TYP
MAX
2.440
2.465
2.490
2.490
2.6
3.0
0.2
0.4
12
20
2.540
2.515
6
10
0.6
1.0
18
FT336/FT336B
MIN
TYP
MAX
2.390
2.440
2.490
2.490
2.6
3.0
0.2
0.4
1.8
20
2.590
2.540
10
12
1.0
1.4
6
SYMBOL
V
Z
PARAMETER
Reverse Breakdown Voltage
CONDITIONS
T
A
= 25°C, I
R
= 1mA
FT136/FT336
FT136A/FT336B
400µA
≤
I
R
≤
10mA
T
A
= 25°C
T
MIN
≤
T
A
≤
T
MAX
I
R
= 1mA
T
A
=25°C
T
MIN
≤
T
A
≤
T
MAX
V
R
Adjusted to 2.490V, I
R
= 1mA,
T
MIN
≤
T
A
≤
T
MAX
(See Figure 1)
T
A
= 25°C
±
0.1°C, I
R
= 1mA
∆V
Z
∆I
R
r
Z
Reverse Breakdown Change
with Current
Reverse Dynamic Impedance
∆V
Z
∆Temp
∆V
Z
∆Time
Temperature Stability
Long Term Stability
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The FT1009 is an improved, low cost, pin for pin replacement for
the “A” and “B” versions. For further information consult the FT1009 data
sheet.
U
U
W
W W
U
W
Lead Temperature (Soldering, 10 sec).................. 300°C
Reverse Current .................................................... 15mA
Forward Current ................................................... 10mA
BOTTOM VIEW
ADJ
+
–
ORDER PART
NUMBER
FT336Z-2.5
FT336BZ-2.5
Z PACKAGE
3-LEAD PLASTIC TO-92
(NOTE 2)
T
JMAX
= 150°C,
θ
JA
= 160°C/W
UNITS
V
V
mV
mV
Ω
Ω
mV
ppm/kHr
q
q
q
V
+
R
1mA
*
D1
5k
†
2.490V
D1, D2 1N4148
* ADJUST TO 2.490
ANY SILICON
SIGNAL DIODE
†
D2
†
Figure 1. Adjusting the
FT336
for
Minimum Temperature Coefficient
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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