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Frequency-to-Voltage Converter. NTE995 Datasheet

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Frequency-to-Voltage Converter. NTE995 Datasheet
















NTE995 Converter. Datasheet pdf. Equivalent













Part

NTE995

Description

Integrated Circuit Frequency-to-Voltage Converter



Feature


NTE995 & NTE995M Integrated Circuit Freq uency–to–Voltage Converter Descript ion: The NTE995 (14–Lead DIP) and NTE 995M (8–Lead DIP) are monolithic freq uency to voltage converters with a high gain OP amp/comparator designed to ope rate a relay, lamp, or other load when the input frequency reaches or exceeds a selected rate. The tachometer uses a charge pump technique and .
Manufacture

NTE Electronics

Datasheet
Download NTE995 Datasheet


NTE Electronics NTE995

NTE995; offers frequency doubling for low ripple , full input protection, and its output swings to GND for a zero frequency inp ut. Advantages: D Output Swing to GND f or Zero Frequency Input D Easy to Use: VOUT = fIN x VCC x R1 x C1 D Only One R C Network Provides Frequency Doubling D Zener Regulator On Chip Allows Accurat e and Stable Frequency to Voltage or Cu rrent Conversion F.


NTE Electronics NTE995

eatures: D Ground Referenced Tachometer Input Interfaces Directly with Variable Reluctance Magnetic Pickups D OP Amp/C omparator has Floating Transistor Outpu t D 50mA Sink or Source to Operate Rela ys, Solenoids, Meters, or LEDs D Freque ncy Doubling for Low Ripple D Tachomete r has Built–In Hysteresis with Either Differential Input or Ground Reference d Input D Built–In Z.


NTE Electronics NTE995

ener Diode D ±0.3% Linearity Typical D Ground Referenced Tachometer is Fully P rotected from damage Due to Swings Abov e VCC and Below GND Applications: D Ove r/Under Speed Sensing D Frequency to Vo ltage Conversion (Tachometer) D Speedom eters D Breaker Point Dwell Meters D Ha nd–Held Tachometer D Speed Governors D D D D D Cruise Control Automotive D oor Lock Control Clut.





Part

NTE995

Description

Integrated Circuit Frequency-to-Voltage Converter



Feature


NTE995 & NTE995M Integrated Circuit Freq uency–to–Voltage Converter Descript ion: The NTE995 (14–Lead DIP) and NTE 995M (8–Lead DIP) are monolithic freq uency to voltage converters with a high gain OP amp/comparator designed to ope rate a relay, lamp, or other load when the input frequency reaches or exceeds a selected rate. The tachometer uses a charge pump technique and .
Manufacture

NTE Electronics

Datasheet
Download NTE995 Datasheet




 NTE995
NTE995 & NTE995M
Integrated Circuit
Frequency–to–Voltage Converter
Description:
The NTE995 (14–Lead DIP) and NTE995M (8–Lead DIP) are monolithic frequency to voltage con-
verters with a high gain OP amp/comparator designed to operate a relay, lamp, or other load when
the input frequency reaches or exceeds a selected rate. The tachometer uses a charge pump tech-
nique and offers frequency doubling for low ripple, full input protection, and its output swings to GND
for a zero frequency input.
Advantages:
D Output Swing to GND for Zero Frequency Input
D Easy to Use: VOUT = fIN x VCC x R1 x C1
D Only One RC Network Provides Frequency Doubling
D Zener Regulator On Chip Allows Accurate and Stable Frequency to Voltage or Current Conversion
Features:
D Ground Referenced Tachometer Input Interfaces Directly with Variable Reluctance Magnetic
Pickups
D OP Amp/Comparator has Floating Transistor Output
D 50mA Sink or Source to Operate Relays, Solenoids, Meters, or LEDs
D Frequency Doubling for Low Ripple
D Tachometer has Built–In Hysteresis with Either Differential Input or Ground Referenced Input
D Built–In Zener Diode
D ±0.3% Linearity Typical
D Ground Referenced Tachometer is Fully Protected from damage Due to Swings Above VCC
and Below GND
Applications:
D Over/Under Speed Sensing
D Cruise Control
D Frequency to Voltage Conversion (Tachometer) D Automotive Door Lock Control
D Speedometers
D Clutch Control
D Breaker Point Dwell Meters
D Horn Control
D Hand–Held Tachometer
D Touch or Sound Switches
D Speed Governors




 NTE995
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
Hysteresis
Offset Voltage
NTE995
NTE995M
Input Bias Current
Output Voltage (High Level, Pin2)
Output Voltage (Low Level, Pin2)
Output Current
Leakage Current
Gain Constant
VOH
VOL
I2, I3
I3
K
VIN = 250mVPP @ 1kHz, Note 2
VIN = 250mVPP @ 1kHz, Note 2
VIN = 250mVPP @ 1kHz, Note 2
VIN = ±50mV
VIN = +125mV, Note 3
VIN = 125mV, Note 3
V2 = V3 = 6V, Note 4
I2 = 0, V3 = 0
Note 3
±10 ±25
30
3.5
5.0
0.1
8.3
2.3
140 180
––
0.9 1.0
±40
10
15
1.0
240
0.1
1.1
mV
mV
mV
mV
µA
V
V
µA
µA
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 10Mtypically.
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.




 NTE995
Electrical Characteristics (Contd): (VCC = 12V, TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
OP Amp/Comparator
Input CommonMode Voltage
Voltage Gain
VOS
IBIAS
VIN = 6V
VIN = 6V
3
10 mV
50
500
nA
0 VCC1.5V V
200 V/mV
Output Sink Current
Output Source Current
Saturation Voltage
Zener Regulator
VC = 1.0
VE = VCC 2.0
ISINK = 5mA
ISINK = 20mA
ISINK = 50mA
40 50
10
0.1
––
1.0
0.5
1.0
1.5
mA
mA
V
V
V
Regulator Voltage
Series Resistance
RDROP = 470
7.56
10.5
15.0
V
Temperature Stability
+1
mV/°C
Total Supply Current
3.8
6.0
mA
Pin Connection Diagram
NTE995
NTE995M
+ Comparator 1
Charge Pump Cap 2
Charge Pump Out 3
+ Op Amp In 4
Output Emitter 5
N.C. 6
N.C. 7
14 N.C.
13 N.C.
12 GND
11 Comparator In
10 Op Amp In
9 Vcc
8 Output Collector
+ Comparator In 1
Charge Pump Cap 2
Charge Pump
Output
3
Emitter Output 4
8
GND/
Frequency Input
7 Op Amp In
6 Vcc
5 Collector Output




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