NJM2268M-TE3

NJM2268 DUAL VIDEO 6dB AMPLIFIER WITH 75Ω DRIVER ■ GENERAL DESCRIPTION NJM2268 is a dual video 6dB amplifier with 75Ω drivers for S-VHS VCRs, HI-BAND VCRs, etc..One channel has clamp function that fixes DC level of video signal and another one is bias type. Furthermore it has 75Ω drivers to be connected to TV monitors directly and sag corrective circuits that prevent the generation of sag with smaller capacitance than ever. Its operating supply voltage is 4.85 to 9V and bandwidth is 7MHz. ■ FEATURES ● Wide Operating Voltage (4.85 to 9.0V) ● Dual Channel (Clamp Type, Bias Type) ● Internal Driver Circuit For 75Ω Load ● SAG Corrective Function ● Wide Frequency Range 7MHz ● Low Operating Current 14.0mA (Dual) ● Package Outline DIP8, DMP8, SSOP8 ● Bipolar Technology ■ PACKAGE OUTLINE NJM2268D NJM2268M NJM2268V ■ RECOMMENDED OPERATING CONDITION ● Operating Voltage V+ 4.85 to 9.0V ■ APPLICATIONS ● VCR,Video Camera, TV, Video Disc Player ■ BLOCK DIAGRAM Ver.2004-02-17 -1- NJM2268 ■ ABSOLUTE MAXIMUM RATINGS PARAMETER (Ta=25°C) SYMBOL + RATINGS UNIT V mW mW mW Supply Voltage Power Dissipation V PD Operating Temperature Range Topr 10 (DIP8) 500 (DMP8) 300 (SSOP8) 250 -40 to +85 Storage Temperature Range Tstg -40 to +125 °C °C (V+=5V, Ta=25°C) ■ ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT - 14.0 18.2 mA 5.7 6.2 6.7 dB Operating Current ICC No Signal Voltage Gain GV VIN=1MHz, 1VP-PSinewave Frequency Characteristic Gf VIN=1VP-P, Sinewave, 7MHz / 1MHz - - ±1.0 dB Differential Gain* DG VIN=1VP-P, Staircase - 1.0 3.0 % Differential Phase* DP VIN=1VP-P, Staircase - 1.0 3.0 deg Crosstalk CT VIN=4.43MHz, 1VP-P, Sinewave - -70 - dB Gain Offset GCH VIN=1MHz, 1VP-P, GCH=VOUT1-VOUT2 - - ±0.5 dB Input Clamp Voltage VCL 1.79 1.91 2.03 V Input Bias Voltage VBt 2.56 2.84 3.12 V SAG Terminal Gain GSAG 35 45 - dB NOTE: “*” is applied to clamp type input side only / ■ APPLICATION Oscillation Prevention It is much effective to insert LPF (Cutoff Frequency 70MHz) under light loading conditions (RL » 1kΩ). This IC requires 1MΩ resistance between INPUT and GND pin for clamp type input since the minute current causes an unstable pin voltage. -2- Ver.2004-02-17 NJM2268 ■ TEST CIRCUIT ■ TEST METHODES PARAMETER SYMBOL SWITCH CONDITIONS S1 S2 S3 S4 S5 CONDITIONS S6 Supply Current Voltage Gain ICC GV H H H H ON ON Frequency Characteristic Gf H H ON ON VOUT1 / VIN1, VOUT2 / VIN2 at VIN1(VIN2)=1MHz, 1VP-P, Sinewave GV1M; Voltage Gain at VIN1 (VIN2)=1MHz, 1VP-P GV10M; Voltage Gain at VIN1 (VIN2)=10MHz, 1VP-P Gf =GV10M-GV1M Differential Gain DG H H ON ON Measuring VOUT3 at VIN1=Staircase Signal Differential Phase Crosstalk DP CT H H ON ON Measuring VOUT3 at VIN1=Staircase Signal H L ON ON VOUT2 / VOUT1 at VIN1=4.43MHz, 1VP-P, Sinewave VOUT1 / VIN2 at VIN2=4.43MHz, 1VP-P, Sinewave Gain Offset GCH H H ON ON GV1=VOUT1 / VIN1, GV2=VOUT2 / VIN2 GCH=GV1-GV2 Input Clamp Voltage VCL H H Measuring at TP1 Input Bias Voltage SAG Terminal Gain VBt GSAG H H Measuring at TP2 H H H H Ver.2004-02-17 7PIN Sink Current ON ON TP3 Voltage; VO1A, TP5 Voltage; VSO1A TP3 Voltage; VO1B, TP5 Voltage; VSO1B GSAG=20log { (VO1B-VO1A) / (VSO1A-VSO1B) } -3- NJM2268 (V+=5.0V, Ta=25°C) ■ TERMINAL FUNCTION PIN No. 1 PIN NAME Input Clamp Terminal SYMBOL VIN1 2 3 GND SAG correction GND VSAG1 Ground SAG caused by a coupling capacitor of the output can be prevented by connecting this terminal with the output terminal through an external capacitor.(see block diagram) When SAG correcting function is not necessary, this terminal must be connected with pin “4” directly. 4 Video Output1 VOUT1 Output terminal (clamp side) that can drive 75Ω line. 5 Video Output2 VOUT2 Output terminal (bias side) that can drive 75Ω line. 6 No Connection + V Input Clamp Terminal NC 7 8 -4- + V VIN2 EQUIVALENT CIRCUIT FUNCTIONS Input terminal of 1VP-P composite Signal or Y signal. Clamp level is 1.9V Supply Voltage Input terminal of 1VP-P coler signal. Bias level is 2.8V. Ver.2004-02-17 NJM2268 ■ TYPICAL CHARACTERISTICS Operating Current vs. Ta Output DC Level vs. Ta SAG Terminal Gain vs. Ta Ver.2004-02-17 Input DC Level vs. Ta SAG Terminal Voltage vs. Ta Voltage Gain vs. Ta (Clamp Type Input) -5- NJM2268 ■ TYPICAL CHARACTERISTICS Voltage Gain vs. Ta (Bias Type Input) Gain Frequency Characteristics vs. Ta (Bias Type Input) Differential Phase vs. Ta -6- Gain Frequency Characteristics vs. Ta (Clamp Type Input) Differential Gain vs. Ta Operating Current vs. Operating Voltage Ver.2004-02-17 NJM2268 ■ TYPICAL CHARACTERISTICS Input DC Level vs. Operating Voltage SAG Terminal Voltage vs. Operating Voltage Voltage Gain vs. Operating Voltage (Clamp Type Input) Ver.2004-02-17 Output DC Level vs. Operating Voltage SAG Terminal Gain vs. Operating Voltage Voltage Gain vs. Operating Voltage (Bias Type Input) -7- NJM2268 ■ TYPICAL CHARACTERISTICS Gain Frequency Characteristics vs. Operating Voltage (Clamp Type Input) Differential Gain vs. Operating Voltage Voltage Gain vs. Frequency (Clamp Type Input) -8- Gain Frequency Characteristics vs. Operating Voltage (Bias Type Input) Differential Phase vs. Operating Voltage Voltage Gain vs. Frequency (Bias Type Input) Ver.2004-02-17 NJM2268 ■ TYPICAL CHARACTERISTICS Small Signal Voltage Gain vs. Frequency (Clamp Type Input) Cross Talk vs. Frequency Voltage Gain vs. RL (Bias Type Input) Ver.2004-02-17 Small Signal Voltage Gain vs. Frequency (Bias Type Input) Voltage Gain vs. RL (Clamp Type Input) Gain Frequency Characteristics vs. RL (Clamp Type Input) -9- NJM2268 ■ TYPICAL CHARACTERISTICS Gain Frequency Characteristics vs. RL (Bias Type Input) Differential Gain vs. RL Differential Phase vs. RL Differential Gain vs. APL Differential Phase vs. APL - 10 - Ver.2004-02-17 NJM2268 ■ APPLICATION This IC requires 1MΩ resistance between INPUT and GND pin for clamp type input since the minute current causes an unstable pin voltage. [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. Ver.2004-02-17 - 11 -