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NTE995 Datasheet(PDF) 2 Page - NTE Electronics

Part No. NTE995
Description  Integrated Circuit Frequency-to-Voltage Converter
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Maker  NTE [NTE Electronics]
Homepage  http://www.nteinc.com
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NTE995 Datasheet(HTML) 2 Page - NTE Electronics

   
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Absolute Maximum Ratings:
Supply Voltage, VCC
28V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Current (Zener Options)
25mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Collector Voltage
28V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential Input Voltage
Tachometer
28V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OP Amp/Comparator
28V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage Range
Tachometer
NTE995M
±28V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NTE955
0.0V to +28V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OP Amp/Comparator
0.0V to +28V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (Note 1), PD
NTE995M
1200mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NTE995
1580mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, Topr
–40
° to +85°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, Tstg
–65
° to +150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature, TL
NTE995, NTE995M (During Soldering, 10sec)
+260
°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NTE995M
(Vapor Phase, 60sec)
+215
°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Infrared, 15sec)
+220
°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. For operation in ambient temperatures above 25
°C, the device must be derated based on
a +150
°C maximum junction temperature and a thermal resistance of +101°C/W junction to
ambient for the NTE995M, and +79
°C/W junction to ambient for the NTE995.
Electrical Characteristics: (VCC = 12V, TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Tachometer
Input Thresholds
VIN = 250mVP–P @ 1kHz, Note 2
±10
±25
±40
mV
Hysteresis
VIN = 250mVP–P @ 1kHz, Note 2
30
mV
Offset Voltage
NTE995
VIN = 250mVP–P @ 1kHz, Note 2
3.5
10
mV
NTE995M
5.0
15
mV
Input Bias Current
VIN = ±50mV
0.1
1.0
µA
Output Voltage (High Level, Pin2)
VOH
VIN = +125mV, Note 3
8.3
V
Output Voltage (Low Level, Pin2)
VOL
VIN = –125mV, Note 3
2.3
V
Output Current
I2, I3
V2 = V3 = 6V, Note 4
140
180
240
µA
Leakage Current
I3
I2 = 0, V3 = 0
0.1
µA
Gain Constant
K
Note 3
0.9
1.0
1.1
Linearity
fIN = 1kHz, 5kHz, 10kHz, Note 5
–1.0
0.3
+1.0
%
Note 2. Hysteresis is the sum + VTH – (–VTH), offset voltage is their difference.
Note 3. VOH is equal to 3/4 x VCC – 1 VBE, VOL is equal to 1/4 x VCC – 1 VBE therefore VOH – VOL = VCC/2.
The difference, VOH – VOL, and the mirror gain, I2/I3, are two factors that cause the tachometer
gain constant to vary from 1.0.
Note 4. Be sure when choosing the time constant R1 x C1 that R1 is such that the maximum antici-
pated output voltage at Pin3 can be reached with I3 x R1. The maximum value for R1 is lim-
ited by the output resistance of Pin3 which is greater than 10M
Ω typically.
Note 5. Nonlinearity is defined as the deviation of VOUT (@ Pin3) for fIN = 5kHz from a straight line
defined by the VOUT @ 1kHz and VOUT @ 10kHz. C1 = 1000pF, R1 = 68k and C2 = 0.22mFd.


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