NTE995 Frequency-to-Voltage Converter PDIP-14

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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: V_OUT = f_IN x V_CC 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 V_CC 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: (T_A = +25°C, V_CC = 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.