NTE999SM PDF даташит
Спецификация NTE999SM изготовлена «NTE Electronics» и имеет функцию, называемую «Integrared Circuit Programmable Precision Reference». |
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Детали детали
Номер произв | NTE999SM |
Описание | Integrared Circuit Programmable Precision Reference |
Производители | NTE Electronics |
логотип |
3 Pages
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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 0.22Ω. 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: 0.22Ω Typical
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
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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
Off–State 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 Ω
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 = T2–T1
Note 2: (cont’d) 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.
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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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Номер в каталоге | Описание | Производители |
NTE999SM | Integrared Circuit Programmable Precision Reference | NTE Electronics |
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