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Precision Reference. NTE999M Datasheet

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Precision Reference. NTE999M Datasheet
















NTE999M Reference. Datasheet pdf. Equivalent













Part

NTE999M

Description

Integrared Circuit Programmable Precision Reference



Feature


NTE999M Integrared Circuit Programmable Precision Reference Description: The NT E999M integrated circuit is a three–t erminal programmable shunt regulator. T his monolithic IC voltage reference ope rates as a low temperature coefficient zener which is programmable from Vref t o 36 volts with two external resistors. This device exhibits a wide operating current range of 1.0.
Manufacture

NTE Electronics

Datasheet
Download NTE999M Datasheet


NTE Electronics NTE999M

NTE999M; to 100mA with a typical dynamic impedan ce of 0.22Ω. The characteristics of t his reference make it an excellent repl acement for zener diodes in many applic ations such as digital voltmeters, powe r supplies, and op amp circuitry. The 2 .5 volt reference makes it convenient t o obtain a stable reference from 5.0 vo lt logic supplies, and since the NTE999 M operates as a shun.


NTE Electronics NTE999M

t regulator, it can be used as either a positive or negative voltage reference. Features: D Programmable Output Voltag e to 36 Volts D Voltage Reference Toler ance: ±1.0% D Low Dynamic Output Imped ance: 0.22Ω Typical D Sink Current Ca pability of 1.0 to 100mA D Equivalent F ull Range Temperature Coefficient of 50 ppm/°C Typical D Temperature Compensat ed for Operation over .


NTE Electronics NTE999M

Full Rated Operating Temperature Range D Low Output Noise Voltage. Absolute Max imum Ratings: (TA = 0° to +70°C, unle ss otherwise noted.) Cathode to Anode V oltage, VKA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37V Cathode Current Range, Continuou s, IK . . . . . . . . . . . . . . . . . . . . . . . . . . ..





Part

NTE999M

Description

Integrared Circuit Programmable Precision Reference



Feature


NTE999M Integrared Circuit Programmable Precision Reference Description: The NT E999M integrated circuit is a three–t erminal programmable shunt regulator. T his monolithic IC voltage reference ope rates as a low temperature coefficient zener which is programmable from Vref t o 36 volts with two external resistors. This device exhibits a wide operating current range of 1.0.
Manufacture

NTE Electronics

Datasheet
Download NTE999M Datasheet




 NTE999M
NTE999M
Integrared Circuit
Programmable Precision Reference
Description:
The NTE999M 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 NTE999M 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” from case for 10sec), TL . . . . . . . . . . . . . . . . . . . +260°C




 NTE999M
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.




 NTE999M
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.
85
.256 (6.52) Max
14
.393 (10.0)
Max
.150
(3.81)
.300
(7.62)
.100 (2.54)
.300 (7.62)
.070 (1.77) Min




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