version 1.0 2005/2/21 1 agamem electronics inc. AA8600 ___________________________________________________________ preliminary y/c mix ? ? feature 1. y/c mix circuit 2. output and chrominance muting function 3. output protection function 4. sag correction function 5. a load suf ficient for driving two circuits 6. low power consumption, 60mw typical 7. internal voltage clamp circuit ? ? description AA8600 is a y/c mix with 6db gain, 75 ? output buffer and sag correction. the 75 ? buffer is capable of driving two circuits. the sag could reduce the capacitance of output coupling capacitor. the y signal is clamped input, while the c signal is biased input. the power saving circuit provides t he output and chrominance muting function. the ic is available in 8 - pin tssop. ? block diagram & pin assignment cin gnd yin 4 3 2 1 5 6 7 8 clamp 6db amp bias mute chrominance mute 75 ? buff mute vcc out mutc sag ? ? application ? ? vcr ? ? video camera ? ? tv ? ? video player
version 1.0 2005/2/21 2 agamem electronics inc. AA8600 ________________________________ ___________________________ preliminary y/c mix ? ? pin description symbol pin - no type function mute 1 i output is muted as this pin is set to high yin 2 i composite y input signal is clamped input gnd 3 ground cin 4 i chrominance c inp ut signal is bias input mutc 5 i only chrominance output signal is muted as this pin is set to high sag 6 o sag correction to reduce the capacitance of output coupling capacitor out 7 o y/c mix output. as it is less than 0.6v, the protect circuit is tri ggered to enable the power saving function vcc 8 power supply ? ? absolute maximum rating ta = 25 rating parameter symbol min typ max unit condition supply voltage vcc - 0.3 8 v operating ambient temperature ta - 25 75 storage temperature ts - 55 125 note : stress above those listed under absolute maximum rating may cause permane nt damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditi ons for the extended periods of time may affect device reliability.
version 1.0 2005/2/21 3 agamem electronics inc. AA8600 ___________________________________________________________ preliminary y/c mix ? ? electrical characteristics ta = 25 , vcc = 5v parameter symbol min typ max unit condition supply current icc 12.6 20 ma no input signal voltage gain gv - 0.3 db input signal freq = 4.43mhz, 1v p - p , measure v o1 frequency characteristic g f - 1.5 - 0.5 0.5 db input signal freq = 7mhz/1mhz , 1v p - p , measure v o1 muting attenuation m t - 64 db input signal freq = 4.43mhz, 1v p - p , measure v o1 muting high level v mh 2.2 vcc v muting low level v ml gnd 0.8 v input impedance z in 15 20 25 k ? cin, 50ua muted current i m 1 2.5 ma mute = h sag - terminal gain g sag 48 db differential gain dg 1 2 % v in = 1v p - p, refer staircase signal differential phase dp 1 2.5 deg v in = 1v p - p, refer staircase signal ? ? mute mode function mute mutc output muting h na chrominance muting l h
version 1.0 2005/2/21 4 agamem ele ctronics inc. AA8600 ___________________________________________________________ preliminary y/c mix ? ? measurement circuit 1uf to ts 400 ? 0.6 v 2.2 v sw5 sw7 sw6 sw4 sw2 sw1 47uf 0.1uf 100uf 22uf v o2 v o1 0.1uf 0.1uf vcc 150 ? 75 ? 75 ? 1 3 2 1 2 1 3 2 4 3 2 1 5 6 7 8 mute yin cin gnd vcc out mutc sag a a 8 6 0 0 2.2 v 0.8 v 2.1 v 0.8 v ? ? ? ?
version 1.0 2005/2/21 5 agamem electronics inc. AA8600 ________________________________________________ ___________ preliminary y/c mix ? ? measurement condition s sw condition parameter symb ol 1 2 4 5 6 7 measurement method supply current icc 2 1 1 2 o c no signal input voltage gain gv 3 2 2 3 o c input a 4.43mhz, 1vp - p sine wave from ci n and then measure the output level from v o1 frequency characteristic g f 1 2 3 o c g v1m : voltage gain at input frequency=1mhz g v7m : voltage gain at input frequency=7mhz gf=g v7m - g v1m output mut e m t 1 1 2 3 o c input a 4.43mhz, 1vp - p sine wave and the n measure the output level from v o1 chrominance mute m c 3 2 2 1 o c same as output muting input impedance z in 3 1 3 3 o c measure the input voltage v is & the open voltage v io when a 50ua is introduced. the z in = |v is - v io | / 50ua muted current i m 1 1 1 2 o c measure the current of power supply when mute is set at high 3 2 2 3 o c ag terminal gain g sag 3 2 2 3 c o measure the value of t s and to at the first as v s1 & v o1 and the value at second condition as v s2 & v o2, respectively. g sag = 20log{(v s2 - v s1 ) / (v o2 - v o1 ) } 3
version 1.0 2005/2/21 6 agamem electronics inc. AA8600 ___________________________________________________________ preliminary y/c mix ? ? application ? ? with sag ? ? without sag chrominance c composite y 0.1uf 1uf 22uf 100uf 0.1uf 4 3 2 1 5 6 7 8 mute yin cin gnd vcc out mutc sag a a 8 6 0 0 47uf 75 ? 75 ? chrominance c composite y 0.1uf 1uf 0.1uf 4 3 2 1 5 6 7 8 mute yin cin gnd vcc out mutc sag a a 8 6 0 0 1000uf 47uf 75 ? 75 ? ? ? ? ? ? ? ?
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