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Precision Reference. NTE999SM Datasheet

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Precision Reference. NTE999SM Datasheet
















NTE999SM Reference. Datasheet pdf. Equivalent













Part

NTE999SM

Description

Integrared Circuit Programmable Precision Reference



Feature


NTE999SM Integrared Circuit Programmable Precision Reference Description: The N TE999SM integrated circuit is a three terminal programmable shunt regulator. This monolithic IC voltage reference o perates as a low temperature coefficien t zener which is programmable from Vref to 36 volts with two external resistor s. This device exhibits a wide operatin g current range of 1.
Manufacture

NTE Electronics

Datasheet
Download NTE999SM Datasheet


NTE Electronics NTE999SM

NTE999SM; .0 to 100mA with a typical dynamic imped ance of 0.22Ω. The characteristics of this reference make it an excellent re placement for zener diodes in many appl ications such as digital voltmeters, po wer 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 NTE9 99SM operates as a s.


NTE Electronics NTE999SM

hunt regulator, it can be used as either a positive or negative voltage referen ce. Features: D Programmable Output Vol tage to 36 Volts D Voltage Reference To lerance: ±1.0% D Low Dynamic Output Im pedance: 0.22Ω Typical D Sink Current Capability of 1.0 to 100mA D Equivalen t Full Range Temperature Coefficient of 50ppm/°C Typical D Temperature Compen sated for Operation ov.


NTE Electronics NTE999SM

er Full Rated Operating Temperature Rang e D Low Output Noise Voltage. Absolute Maximum Ratings: (TA = 0° to +70°C, u nless otherwise noted.) Cathode to Anod e Voltage, VKA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37V Cathode Current Range, Contin uous, IK . . . . . . . . . . . . . . . . . . . . . . . . . .





Part

NTE999SM

Description

Integrared Circuit Programmable Precision Reference



Feature


NTE999SM Integrared Circuit Programmable Precision Reference Description: The N TE999SM integrated circuit is a three terminal programmable shunt regulator. This monolithic IC voltage reference o perates as a low temperature coefficien t zener which is programmable from Vref to 36 volts with two external resistor s. This device exhibits a wide operatin g current range of 1.
Manufacture

NTE Electronics

Datasheet
Download NTE999SM Datasheet




 NTE999SM
NTE999SM
Integrared Circuit
Programmable Precision Reference
Description:
The NTE999SM integrated circuit is a three–terminal programmable shunt regulator. This monolithic
IC voltage reference operates as a low temperature coefficient zener which is programmable from
Vref to 36 volts with two external resistors. This device exhibits a wide operating current range of 1.0
to 100mA with a typical dynamic impedance of 0.22. The characteristics of this reference make it
an excellent replacement for zener diodes in many applications such as digital voltmeters, power sup-
plies, 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 NTE999SM operates as a shunt regulator, it can be used
as either a positive or negative voltage reference.
Features:
D Programmable Output Voltage to 36 Volts
D Voltage Reference Tolerance: ±1.0%
D Low Dynamic Output Impedance: 0.22Typical
D Sink Current Capability of 1.0 to 100mA
D Equivalent Full Range Temperature Coefficient of 50ppm/°C Typical
D Temperature Compensated for Operation over Full Rated Operating Temperature Range
D Low Output Noise Voltage.
Absolute Maximum Ratings: (TA = 0° to +70°C, unless otherwise noted.)
Cathode to Anode Voltage, VKA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37V
Cathode Current Range, Continuous, IK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –100 to +150mA
Reference Input Current Range, Continuous, Iref . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.05 to +10mA
Total Power Dissipation (TA = +25°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 725mW
Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.8mW/°C
Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Thermal Resistance, Junction–to–Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178°C/W
Thermal Resistance, Junction–to–Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C/W
Lead Temperature (During Soldering, 1/16” ifrom case for 10sec), TL . . . . . . . . . . . . . . . . . . +260°C




 NTE999SM
Recommended Operating Conditions
Cathode to Anode Voltage, VKA
Cathode Current, IK
Min Max Unit
Vref 36 V
1.0 100 mA
Electrical Characteristics (TA = +25°C unless otherwise noted)
Characteristic
Reference Input Voltage
VKA = Vref, IK = 10mA
TA = +25°C
Reference Input Voltage Deviation Over
Temperature Range (Note 1, 2)
VKA = Vref, IK = 10mA
Ratio of Change in Reference Input Voltage
to Change in Cathode to Anode Voltage
IK = 10mA,
VKA = 10V to Vref
VKA = 36V to 10V
Reference Input Current
IK = 10mA, R1 = 10k, R2 =
TA = +25°C
TA = Tlow to Thigh (Note 1)
Reference Input Current Deviation Over
Temperature Range (Note 1)
IK = 10mA, R1 = 10k, R2 =
Minimum Cathode Current for Regulation
VKA = Vref
OffState Cathode Current
VKA = 36V, Vref = 0V
Dynamic Impedance (Note 3)
VKA = Vref, IK = 1.0mA to 100mA
f 1.0kHz
Symbol Min
Vref 2.470
Vref
Vref
VKA
Iref
Iref
Imin
Ioff
|Zka|
Typ
2.495
3.0
1.4
1.0
1.8
1.8
0.5
2.6
0.22
Max Unit
2.520 V
17 mV
2.7
2.0
mV/V
µA
4.0
5.2
4.0 µA
1.0 mA
1000 nA
0.5
Note 1: Tlow = 0°C, Thigh = +70°C
Note 2: The deviation parameter Vref is defined as the differences between the maximum
and minimum values obtained over the full operating ambient temperature range
that applies.
Vref = VrefMax
VrefMin
TA = T2T1
Note 2: (contd) The average temperature coefficient of the reference input voltage, α Vref, is
defined as:
α Vref ppm =
°
Vref
x 106
Vref @ 25°C
Vref x 106
TA = TA (Vref @ 25°C)
C
α Vref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower
ambient temperature.




 NTE999SM
Note 3: The dynamic impedance Zka is defined as: |Zka| =
VKA
IK
When the device is programmed with two external resistors, R1 and R2, the total dynamic imped-
ance of the circuit is defined as:
|Zka| |Zka|
1 + R1
R2
Pin Connection Diagram
Cathode 1
Anode 2
Anode 3
N.C. 4
8 Reference
7 Anode
6 Anode
5 N.C.
.192 (4.9)
8 5 .236
(5.99)
.154
(3.91)
14
.050 (1.27)
016
(.406)
061
(1.53)
.006 (.152)
.198 (5.03)
NOTE: Pin1 on Beveled Edge




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