LM336B STMicroelectronics, LM336B Datasheet - Page 4

• Manufacturer Part Number: LM336B
• Description: 2.5V VOLTAGE REFERENCES
• Manufacturer: STMicroelectronics

LM236 - LM336,B
APPLICATION HINTS
The LM236, LM336 voltage references are easier to
use than zener diodes. Their low impedance and
wide current range facilitate biasing in any circuits.
Besides, the breakdown voltage or the temperature
coefficient can be adjustedso as to optimize the per-
formance of the circuit.
Figure 1 represents a LM336 with a 10k potenti-
ometer to adjust the reverse breakdown voltage can
be adjusted without altering the temperature coeffi-
Figure 1 : The LM336 with Pot for Adjustment of
4/9
LM336
Breakdown Voltage
V
R
S
10k
R1
cient of the circuit. The adjustment range is gener-
ally sufficient to adjust the initial tolerance of the cir-
cuit and the inaccuracy of the amplifier circuit.
To obtain a lower temperaturecoefficienttwo diodes
can be connected in series as indicated in Figure 2.
When the circuit is adjusted to 2.49V the tempera-
ture coefficient is minimized.
For a correct temperature coefficient, the diodes
should be at the same ambient temperature as the
LM336. The value of R1 is not critical (2-20k ).
Figure 2 : Temperature Coefficient Adjustment
LM336
V
R
S
10k
1N4148
R1
1N4148