NJM2267V-TE1

Designated client product This product will be discontinued its production in the near term. And it is provided for customers currently in use only, with a time limit. It can not be available for your new project. Please select other new or existing products. For more information, please contact our sales office in your region. New Japan Radio Co.,Ltd. www.njr.com NJM2267 DUAL VIDEO 6dB AMPLIFIER WITH 75Ω DRIVER ■ GENERAL DESCRIPTION NJM2267 is a dual video 6dB amplifier with 75Ω drivers for S-VHS VCRs, HI-BAND VCRs, etc..Each channel has clamp function that fixes DC level of video signal and 75Ω drivers to be connected to TV monitors directly. Further more it has 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 (4.85V to 9.0V) ● Dual Channel ● Internal Clamp Function ● 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 NJM2267D NJM2267M NJM2267V ■ APPLICATIONS ●VCR, Video Camera, TV, Video Disc Player. ■ BLOCK DIAGRAM Ver.2016-06-06 -1- NJM2267 ■ 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 ■ ELECTRICAL CHARACTERISTICS PARAMETER (V+=5V, Ta=25±2°C) 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 Characteristics 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 SAG Terminal Gain GSAG 35 45 - dB ■ APPLICATION Oscillation Prevention It is much effective to insert LPF (Cutoff Frequency 70MHz) under light loading conditions (RL » 1kΩ) -2- Ver.2016-06-06 NJM2267 ■ TERMINAL FUNCTION (V+=5.0V, Ta=25°C) 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 that can drive 75Ω line. 5 Video Output2 VOUT2 Output terminal that can drive 75Ω line. 6 SAG correction VSAG2 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 “5” directly. 7 8 V Input Clamp Terminal + Ver.2016-06-06 + 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 composite signal or Y signal. Clamp level is 1.9V -3- NJM2267 ■ TEST CIRCUIT ■ TEST METHODES PARAMETER SWITCH CONDITIONS SYMBOL S1 S2 S3 S4 Supply Current ICC H H Voltage Gain GV H H ON ON Frequency Characteristic Gf H H ON ON Differential Gain DG H H ON ON Differential Phase DP H H ON ON Crosstalk CT H L ON ON Gain Offset GCH H H ON ON Input Clamp Voltage VCL GSAG H H H H H H SAG Terminal Gain -4- S5 CONDITIONS S6 7PIN Sink Current VOUT1 / VIN, VOUT2 / VIN2 at VIN1(VIN2)=1MHz, 1VP-P, Sinewave GV1M; Voltage Gain at VIN1 (VIN2)=1MHz, 1VP-P GV10M; Voltage Gain at VIN1 (VIN2)=7MHz, 1VP-P Gf =GV10M-GV1M Measuring VOUT3 at VIN1=Staircase Signal ON ON Measuring VOUT3 at VIN1=Staircase Signal VOUT2 / VOUT1 at VIN1=4.43MHz, 1VP-P, Sinewave VOUT1 / VIN2 at VIN12=4.43MHz, 1VP-P, Sinewave GV1=VOUT1 / VIN1, GV2=VOUT2 / VIN2 GCH=GV1-GV2 Measuring at TP1 (TP2) TP3 (TP4) Voltage; Vo1A (Vo2A), TP5 (TP6) voltage; Vso1A (Vso2A) TP3 (TP4) Voltage; Vo1B(Vo2B), TP5 (TP6) voltage; Vso1B (Vso2B) GSAG=20log{ (Vo1B-Vo1A) / (Vso1A-Vso1B) } GSAG=20log{ (Vo2B-Vo2A) / (Vso2A-Vso2B) } Ver.2016-06-06 NJM2267 Clamp circuit 1. Operation of Sync-tip-clamp Input circuit will be explained. Sync-tip clamp circuit (below the clamp circuit) operates to keep a sync tip of the minimum potential of the video signal. Clamp circuit is a circuit of the capacitor charging and discharging of the external input Cin. It is charged to the capacitor to the external input Cin at sync tip of the video signal. Therefore, the potential of the sync tip is fixed. And it is discharged charge by capacitor Cin at period other than the video signal sync tip. This is due to a small discharge current to the IC. In this way, this clamp circuit is fixed sync tip of video signal to a constant potential from charging of Cin and discharging of Cin at every one horizontal period of the video signal. The minute current be discharged an electrical charge from the input capacitor at the period other than the sync tip of video signals. Decrease of voltage on discharge is dependent on the size of the input capacitor Cin. If you decrease the value of the input capacitor, will cause distortion, called the H sag. Therefore, the input capacitor recommend on more than 0.1uF. signal input Cin charge current Vin Clamp circuit diccharge current < Clamp circuit > A. Cin is large B. Cin is small (H sag experience) clamp potential clamp potential charge period discharge period charge period charge period discharge period charge period < Waveform of input terminal > 2. Input impedance The input impedance of the clamp circuit is different at the capacitor discharge period and the charge period. The input impedance of the charging period is a few k. On the other hand, the input impedance of the discharge period is several M. Because is a small discharge-current through to the IC. Thus the input impedance will vary depending on the operating state of the clamp circuit. 3. Impedance of signal source Source impedance to the input terminal, please lower than 200. A high source impedance, the signal may be distorted. If so, please to connect a buffer for impedance conversion. Ver.2016-06-06 -5- NJM2267  SAG correction circuit SAG correction circuit is a circuit to correct for low-frequency attenuation by high-pass filter consisting of the output coupling capacitance and load resistance. Low-frequency attenuation raises the sag in the vertical period of the video signal. Capacitor for Vsag (Csag) is connected to the negative feedback of the amplifier. This Csag increase the low frequency gain to correct for the attenuation of low frequency gain. Example SAG collection circuit resistance:RL Vout Cout Vsag Csag Vout1 Example of not using sag compensation circuit resistance:RL Vout Cout Vout1 Vsag Waveform of Vout terminal and Vout1 terminal using SAG correction circuit Waveform of Vout Waveform of Vout1 1Vertical period -6- not using SAG correction circuit Waveform of Vout Waveform of Vout1 1Vertical period Ver.2016-06-06 NJM2267 SAG correction circuit generates a low frequency component signal amplified to Vout terminal. Changes of the luminance signal will be low-frequency components, if you want to output a large signal luminance changes. Therefore, generate correction signal of change of a luminance signal to Vout pin. At this time, signal is over the dynamic range of Vout pin. This may cause a lack of sync signal, and waveform distortion. Please see diagram below (green waveform), if you want to output large changes of a signal luminance, such as 100% white video signal and black signal. Thus, output signal exceed dynamic range of Vout pin and may be the signal lack. Input signal Waveform of Vout The sync signal is missing because exceed the dynamic range of Vout. Dynamic range of Vout Waveform of Vout1 < Countermeasure for waveform distortion > 1. Please using small value the Sag compensation capacitor (CSAG). It can ensure the dynamic range by using small value the capacitor (CSAG). It because of low-frequency variation of Vout pin is smaller. However, the output (COUT) must be use large capacitor for this reason sag characteristics become exacerbated. 2. Please do not use the sag correction circuit. Signal can output within dynamic range for reason it does not change the DC level of the output terminal. However, the output (COUT) must be use large capacitor for this reason sag characteristics become exacerbated. 3. To increase the power supply voltage Internal reference voltage is dividing the power supply voltage and GND. Therefore, it can ensure the dynamic range by increasing the power supply voltage. Ver.2016-06-06 -7- NJM2267 Vcc=9.0V Cout=330uF Cout=220uF Cout=100uF Cout=47uF Cout=33uF < Using SAG correction circuit > Csag=10uF, Input signal: bounce signal (IRE0%, IRE100%, 30Hz), resistance=150 Waveform: yellow: input signal, green: Vout signal, purple: Vout1signa, red: clip length of waveform Vcc=5.0V Vcc=7.0V -8- Ver.2016-06-06 NJM2267 Vcc=9.0V Cout=330uF Cout=220uF Cout=100uF Cout=47uF Cout=33uF < Using SAG correction circuit > Csag=22uF, Input signal: bounce signal (IRE0%, IRE100%, 30Hz), resistance=150 Waveform: yellow: input signal, green: Vout signal, purple: Vout1signa, red: clip length of waveform Vcc=5.0V Vcc=7.0V Ver.2016-06-06 -9- NJM2267 Vcc=9.0V Cout=330uF Cout=220uF Cout=100uF Cout=47uF Cout=33uF < Using SAG correction circuit > Csag=33uF, Input signal: bounce signal (IRE0%, IRE100%, 30Hz), resistance=150 Waveform: yellow: input signal, green: Vout signal, purple: Vout1signa, red: clip length of waveform Vcc=5.0V Vcc=7.0V - 10 - Ver.2016-06-06 NJM2267 Vcc=9.0V Cout=330uF Cout=220uF Cout=100uF Cout=47uF Cout=33uF < Using SAG correction circuit > Csag=10uF, Input signal: Black to White100%, resistance150 Waveform: yellow: input signal, green: Vout signal, purple: Vout1signal, red: clip length of waveform Vcc=5.0V Vcc=7.0V Ver.2016-06-06 - 11 - NJM2267 Vcc=9.0V Cout=330uF Cout=220uF Cout=100uF Cout=47uF Cout=33uF < Using SAG correction circuit > Csag=10uF, Input signal: White100% to Black, resistance150 Waveform: yellow: input signal, green: Vout signal, purple: Vout1signal, red: clip length of waveform Vcc=5.0V Vcc=7.0V - 12 - Ver.2016-06-06 NJM2267 Vcc=9.0V Cout=330uF Cout=220uF Cout=100uF Cout=47uF Cout=33uF < Using SAG correction circuit > Csag=22uF, Input signal: Black to White100%, resistance150 Waveform: yellow: input signal, green: Vout signal, purple: Vout1signal, red: clip length of waveform Vcc=5.0V Vcc=7.0V Ver.2016-06-06 - 13 - NJM2267 Vcc=9.0V Cout=330uF Cout=220uF Cout=100uF Cout=47uF Cout=33uF < Using SAG correction circuit > Csag=22uF, Input signal: White100% to Black, resistance150 Waveform: yellow: input signal, green: Vout signal, purple: Vout1signal, red: clip length of waveform Vcc=5.0V Vcc=7.0V - 14 - Ver.2016-06-06 NJM2267 Vcc=9.0V Cout=330uF Cout=220uF Cout=100uF Cout=47uF Cout=33uF < Using SAG correction circuit > Csag=33uF, Input signal: Black to White100%, resistance150 Waveform: yellow: input signal, green: Vout signal, purple: Vout1signal, red: clip length of waveform Vcc=5.0V Vcc=7.0V Ver.2016-06-06 - 15 - NJM2267 Vcc=9.0V Cout=330uF Cout=220uF Cout=100uF Cout=47uF Cout=33uF < Using SAG correction circuit > Csag=33uF, Input signal: White100% to Black, resistance150 Waveform: yellow: input signal, green: Vout signal, purple: Vout1signal, red: clip length of waveform Vcc=5.0V Vcc=7.0V - 16 - Ver.2016-06-06 NJM2267 Cout=1000uF Cout=470uF Cout=330uF Cout=220uF Cout=100uF < Not using SAG correction circuit > Vcc=5V, Input signal: bounce signal (IRE0%, IRE100%, 30Hz), resistance=150 Waveform: yellow: input signal, green: Vout signal, purple: Vout1signal RL=150 Ver.2016-06-06 - 17 - NJM2267 ■ TYPICAL CHARACTERISTICS Operating Current vs. Ta Output DC Level vs. Ta SAG Terminal Gain vs. Ta - 18 - Input DC Level vs. Ta SAG Terminal Voltage vs. Ta Voltage Gain vs. Ta (Clamp Type INput) Ver.2016-06-06 NJM2267 ■ TYPICAL CHARACTERISTICS Gain Frequency Characteristics vs Ta (Clamp Type Input) Ver.2016-06-06 Differential Gain vs. Ta Differential Phase vs. Ta Operating Current vs. Operating Voltage Input DC Level vs. Operating Voltage Output DC Level Vs. Operating Voltage - 19 - NJM2267 ■ TYPICAL CHARACTERISTICS SAG Terminal Voltage vs. Operating Voltage Voltage Gain vs. Operating Voltage Differential Gain vs. Operating Voltage - 20 - SAG Terminal Gain vs. Operating Voltage Gain Frequency Characteristics vs. Operating Voltage Differential Phase vs. Operating Voltage Ver.2016-06-06 NJM2267 ■ TYPICAL CHARACTERISTICS Voltage Gain vs. Frequency Cross Talk vs. Frequency Gain Frequency Characteristics vs. RL Ver.2016-06-06 Small Signal Voltage Gain vs. Frequency Voltage Gain vs. RL Differential Gain vs. RL - 21 - NJM2267 ■ TYPICAL CHARACTERISTICS Differential Phase vs. RL Differential Gain vs. APL Differential Phase vs. APL - 22 - Ver.2016-06-06 NJM2267 ■ 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.2016-06-06 - 23 -