SPX4041 Sipexoration, SPX4041 Datasheet - Page 3

• Manufacturer Part Number: SPX4041
• Description: Precision Micropower 1.24V Shunt Voltage Reference
• Manufacturer: Sipexoration

Note:
SPX4041 Applications Hints
This device is designed for stable operation and has no need
of an external capacitor between pin 4 and 8. The reference
remains stable if a bypass capacitor is used.
SOT-23
The SPX4041 in the SOT-23 package has a parasitic
Schottky diode between pin 3 and pin 1. Pin 1 of SOT-23
must float or be connected to pin 3.
Conventional Shunt Regulator
In a conventional shunt regulator application (see Figure 1),
an external series resister (R
supply voltage and the SPX4041. R
that flows through the load (I
load current and supply voltage may vary, R
enough to supply at least the minimum acceptable I
reference even when the supply voltage is at its minimum and
the load current is at its maximum value. When the supply
voltage is at its maximum and I
be large enough so that the current flowing through the
SPX4041-x.x is less than 15mA
R
operating current (I
voltage (V
S
is determined by the supply voltage (V
1) Three-point measurement guarantees the error band over the specified temperature range.
2) Optimum performance is obtained at currents below 1000 µA.
3) Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation using statistical quality
R
control.
).
R
S
L
= (V
and I
S
Q
), reference’s reverse breakdown
- V
L
) and the reference(I
S
L
) is connected between the
R
is at its minimum, R
)/(I
S
L
determines the current
+I
Q
)
S
S
should be small
), the load and
Q
). Since
S
Q
should
to the
Shunt Regulator Application
Figure 1. SPX4041 Fixed
SPX4041
R
V
R
S
V
S
I
O
I
+ I
Q
L
I
L
SPX4041
Rev. 10/25/00
V
O