Precision References. PJ431 Datasheet

PJ431 References. Datasheet pdf. Equivalent


Promax-Johnton PJ431
www.DataSheet4U.com
PJ431/PJ431A/PJ431B
Programmable Precision References
The PJ431, A, B integrated circuits are three-terminal
programmable shunt regulator diodes. These monolithic
IC voltage references operate as a low temperature coefficient
zener which is programmable from Vref to 36 volts with two
external resistors. These devices exhibit a wide operating
current range of 1.0 to 100mA with a typical dynamic
impedance of 0.22. The characteristics of these
references make them excellent replacements for zener
FEATURES
Programmable Output Voltage to 36 Volts
Voltage Reference Tolerance:
PJ431A : ±0.5%, Typ@25°C
PJ431 : ±1%, Typ@25°C
PJ431B : ±2%, Typ@25°C
Low Dynamic Output Impedance, 0.22 Typical
Sink Current Capability of 1.0 to 100 mA
Equivalent Full-Range Temperature Coefficient of 50
ppm/ Typical
Temperature Compensated for Operation over Full Rated
Operating Temperature Range
Low Output Noise Voltage
BLOCK DIAGRAM
diodes in many applications such as digital voltmeters, power
supplies , and op amp circuitry. The 2.5 volt reference makes
it convenient to obtain a stable reference from 5.0 volt logic
supplies, and since The PJ431, A, B operates as a shunt
regulator, it can be used as either a positive or negative tage
reference.
TO-92
SOT-89
Pin: 1. Reference
2. Anode
3. Cathode
SOT-23
Pin: 1. Reference
2. Cathode
3. Anode
Pin: 1. Reference
2. Anode
3. Cathode
(Heatsink surface
connected to Pin 2)
SOP-8
Pin: 1. Cathode
2. Anode
3. Anode
4. N.C.
5. N.C.
6. Anode
7. Anode
8. Reference
SOP-8 is an internally modified SOP-8 Package. Pins 2,3,6
and 7 are electrically common to the die attach flag. This
internal lead frame modification decreases package thermal
resistance and increases power dissipation capability when
appropriately mounted on a printed on a printed circuit board.
SOP-8 conforms to all external dimensions of the standard
SOP-8 Package.
CIRCUIT SCHEMATIC
QRDERING INFORMATION
Device
PJ431/ A/ B CT
PJ431/ A/ B CS
PJ431/ A/ B CY
PJ431/ A/ B CX
Operating Temperature
(Ambient)
- 20~ +85
Package
TO-92
SOP-8
SOT-89
SOT-23
1-11 2003/01 rev.A


PJ431 Datasheet
Recommendation PJ431 Datasheet
Part PJ431
Description (PJ431x) Programmable Precision References
Feature PJ431; www.DataSheet4U.com PJ431/PJ431A/PJ431B Programmable Precision References diodes in many applicatio.
Manufacture Promax-Johnton
Datasheet
Download PJ431 Datasheet




Promax-Johnton PJ431
www.DataSheet4U.com
PJ431/PJ431A/PJ431B
Programmable Precision References
MAXIMUM RATINGS (Full operating ambient temperature range applies unless otherwise noted.)
Rating
Cathode To Anode Voltage
Cathode Current Range, Continuous
Reference Input Current Range, Continuous
Operating Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range
Total Power Dissipation @ TA = 25
Derate above 25Ambient Temperature
PJ431 / 431A / 431B CT
PJ431 / 431A / 431B CS
PJ431 / 431A /431 B CY
PJ431 / 431A / 431B CX
Total Power Dissipation @ TC = 25
Derate above 25Case Temperature
PJ431 / 431A / 431B CT
PJ431 / 431A / 431B CS
PJ431 / 431A /431 B CY
PJ431 / 431A / 431B CX
THERMAL CHARACTERISTICS
Characteristics
Thermal Resistance, Junction to Ambient
Thermal Resistance, Junction to Case
Symbol
RθJA
RθJC
RECOMMENDED OPERATING CONDITIONS
Condition/Value
Cathode To Anode Voltage
Cathode Current
Symbol
VKA
IK
Symbol
VKA
IK
Iref
TJ
TA
Tstg
PD
PD
Min
178
83
Min
Vref
1.0
Value
37
-100 to +150
-0.05 to +10
150
-20 to +85
-65 to +150
0.625
0.70
0.80
0.30
1.5
1.5
1.5
0.7
Max
114
41
Max
36
100
Unit
V
mA
mA
W
W
Unit
/W
/W
Unit
V
mA
2-11 2003/01 rev.A



Promax-Johnton PJ431
www.DataSheet4U.com
PJ431/PJ431A/PJ431B
Programmable Precision References
1
Tlow =-20 , Thigh = +85
2
The deviation parameter Vref is defined as the
differences between the maximum and minimum values
obtained over the full operating ambient temperature range
the applies.
FIGURE 1 -- TEST CIRCUIT FOR VKA = vref
The average temperature coefficient of the reference input
voltage, α Vref , is defined as :
ppm
αVref
=
(vref )
Vref@25
TA
x106
=
Vref x 106
TA(Vref@25 )
αVref can be positive of negative depending on whether
Vref Min of Vref Max occurs at the lower ambient temperature.
(Refer to Figure 6)
Example: Vref = 8.0 mV and slope is positive,
Vref @ 25 = 2.5V, TA = 85
0.008 × 106
α Vref =
= 45.8 ppm/
70(2.5)
3
The dynamic impedance Zka is defined as:
| Zka | =
VKA
IK
When the device is programmed with two external
resistors, R1 and R2, (refer to Figure 2) the total dynamic
impedance of the circuit is defined as:
R1
| Zka | | Zka | ( 1 +
R2
)
FIGURE 2 -- TEST CIRCUIT FOR VKA > Vref
R1
VKA = Vref ( 1+
R2
) + Iref R1
FIGURE 3 -- TEST CIRCUIT FOR Ioff
4
This test is not applicable to surface mount (D suffix) devices.
3-11 2003/01 rev.A







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