NTE747
Integrated Circuit Low Level Video Detector

Formerly: ECG747

Description:

The NTE747 is a low level video detector in an 8-Lead DIP type package featuring very linear video characteristics and bandwidth. Designed for color and monochrome television receivers, replacing the third IF, detector, video buffer, and the AFC buffer.

Features:

• Conversion Gain: 34dB Typ
• Video Frequency Response @ 6MHz < 1dB
• Input of 36mV Produces 3V_P-P Output
• High Video Output: 7.7V_P-P
• Fully balanced Detector
• High Rejection of IF Carrier
• Low Radiation of Spurious Frequencies

Absolute Maximum Ratings: (T_A = +25°C unless otherwise specified)

Power Supply Voltage		24V
Supply Current		26mA
Input Voltage		1VRMS
Power Dissipation		625mW
Derate Above 25°C		5mW/°C
Operating Ambient Temperature Range		0° to +75°C
Storage Temperature Range		-65° to +150°C

Electrical Characteristics: (T_A = +25°C, V+ = 20V, Q = 30, f_C = 45MHz unless otherwise specified)

Parameter	Pin	Test Conditions	Min	Typ	Max	Unit
Supply Voltage Range	6		12	20	24	V
Supply Current	5, 6		-	15	-	mA
Zero Signal DC Output Voltage	4		6.8	7.7	8.3	V
Maximum Signal DC Output Voltage	4		-	0	-	V
Input Signal Voltage	7	3VP-P Video Output, 90% Modulation	-	36	-	mVRMS
Maximum Output Voltage Swing	4		-	7.7	-	VP-P
Carrier Rejection at Output	4		42	60	-	dB
Carrier Output Voltage		3VP-P Output, fout = fC	-	1	-	mVP-P
		3VP-P Output, fout = 2fC	-	3	-	mVP-P
3dB Bandwidth of IF Carrier	7		-	80	-	MHz
3dB Bandwidth of Video Output	4		-	12.3	-	MHz
Input Resistance	7		-	3.5	-	k Ohm
Input Capacitance	7		-	3.0	-	pF
Internal Resistance	2, 3	Across Tuned Circuit	-	4.4	-	k Ohm
Internal Capacitance	2, 3		-	1.0	-	pF
AFT Buffer Output	1	At Carrier Frequency, Note 1	-	350	-	nVP-P
AFT Buffer DC Level	1		-	6.5	-	V

This product is discontinued.
Only while stock lasts.

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