NTE995 Frequency-to-Voltage Converter PDIP-14
Info als pdf File
To order >>> NTE995M (8-PIN DIP)
Description:
The NTE995 (14-Lead DIP) and NTE995M (8-Lead DIP) are monolithic frequency-to-voltage converters 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 technique and offers frequency doubling for low ripple, full input protection, and its output swings to GND for a zero frequency input.
Advantages:
- Output Swing to GND for Zero Frequency Input
- Easy to Use: VOUT = fIN x VCC x R1 x C1
- Only One RC Network Provides Frequency Doubling
- Zener Regulator On-Chip Allows Accurate and Stable Frequency-to-Voltage or Current Conversion
Features:
- Ground Referenced Tachometer Input Interfaces Directly with variable Reluctance Magnetic Pickups
- OP Amp/Comparator has Floating Transistor Output
- 50mA Sink or Source to Operate Relays, Solenoids, Meters, or LEDs
- Frequency Doubling for Low Ripple
- tachometer has Built-In Hysteresis with Either Differential Input or Ground Referenced Input
- Biult-In Zener Diode
- ±0.3% Linearity Typical
- Ground Referenced tachometer is Fully Protected from Damage due to Swing Above VCC and Below GND
Applications:
- Over/Under Speed Sensing
- Frequency-to-Voltage Conversion (Tachometer)
- Speedometers
- Breaker Point Dwell Meters
- Hand-Held Tachometer
- Speed Governors
| - Cruise Control
- Automotive Door Lock Control
- Clutch Control
- Horn Control
- Touch or Sound Switches
|
Absolute Maximum Ratings:
| Supply Voltage, VCC |
|
28V |
| Supply Current (Zener Options) |
|
25mA |
| Collector Voltage |
|
28V |
Differential Input Voltage
Tachometer
OP Amp/Comparator |
|
28V
28V |
Input Voltage Range
Tachometer
NTE995M
NTE995
OP Amp/Comparator |
|
±28V
0.0V to +28V
0.0V to +28V |
Power Dissipation (Note 1), PD
NTE995M
NTE995 |
|
1200mW
1580mW |
| Operating Temperature Range, Topr |
|
-40°C to +85°C |
| Storage Temperature Range, Tstg |
|
-65°C to +150°C |
Lead Temperature, TL
NTE995, NTE995M (During Soldering, 10sec Max)
NTE995M
(Vapor Phase, 60sec)
(Infrared, 15sec) |
|
+260°C
+215°C
+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: (TA = +25°C, VCC = 12V unless otherwise specified)
| Parameter |
Symbol |
Test Conditions |
Min |
Typ |
Max |
Units |
| Tachometer |
| Input Thresholds |
|
VIN = 250mVP-P Q 1kHz, Note 2 |
±10 |
±25 |
±40 |
mV |
| Hysteresis |
|
VIN = 250mVP-P Q 1kHz, Note 2 |
- |
30 |
- |
mV |
| Offset Voltage |
NTE995 |
|
VIN = 250mVP-P Q 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 = +250mV, Note 3 |
- |
8.3 |
- |
V |
| Output Voltage (Low Level, Pin2) |
VOL |
VIN = -250mV, Note 3 |
- |
2.3 |
- |
V |
| Output Current |
I2, I3 |
V2 = V3 = 6V, Note 4 |
140 |
180 |
240 |
µA |
| Leakage Current |
I3 |
I2 = 0, I3 = 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 |
% |
| OP Amp/Comparator |
| |
VOS |
VIN = 6V |
- |
3 |
10 |
mV |
| |
IBIAS |
VIN = 6V |
- |
50 |
500 |
nA |
| Input Common-Mode Voltage |
|
|
0 |
- |
VCC-1.5V |
V |
| Voltage Gain |
|
|
- |
200 |
- |
V / mV |
| Output Sink Current |
|
VC = 1.0 |
40 |
50 |
- |
mA |
| Output Source Current |
|
VE = VCC-2.0 |
- |
10 |
- |
mA |
| Saturation Voltage |
|
ISINK = 5mA |
- |
0.1 |
0.5 |
V |
| ISINK = 20mA |
- |
- |
1.0 |
V |
| ISINK = 50mA |
- |
1.0 |
1.5 |
V |
| Zener Regulator |
| Regulator Voltage |
|
RDROP = 470 Ohm |
- |
7.56 |
- |
V |
| Series Resistance |
|
|
- |
10.5 |
15.0 |
Ohm |
| Temperature Stability |
|
|
- |
+1 |
- |
mV / °C |
| Total Supply Current |
|
|
- |
3.8 |
6.0 |
mA |
| Note 2. | Hysteresis is the sum +VTH - (-VTH), offset voltage is their difference. |
| Note 3. | VOH is equal to 3/4 x VCC -1VBE, VOL is equal to 1/4 x VCC -1VBE 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 anticipated output voltage at Pin3 can be reached with I3 x R1. the maximum value for R1 is limited by the output resistance of Pin3 which is greater than 10M Ohm 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 OUT @ 10kHz. C1 = 1000pF, R1 = 68k, and C2 = 0.22mFd. |
Anmerkung zu den NTE/ECG Austauschhalbleiter:
NTE-Austauschhalbleiter (früher ECG Philips und Sylvania) sind sorgfältig
ausgesuchte und erprobte Halbleiter, die einen sicheren Ersatz
für Originaltypen verschiedenster Hersteller und Ursprünge für
fast alle Applikationsbereiche im Wartungsdienst bieten.
Alle NTE-Austausch-Halbleiter sind einzeln in durchsichtigen
Plastikbeuteln verpackt, auf welchen die wichtigsten Daten
vermerkt sind.
Falls Sie einen Halbleiter suchen, können Sie entweder die NTE QuickCross
Software bei uns als CD kaufen (Best.Nr. 08.NTE.CD) oder
sie gratis vom Internet runterladen.
