ver: 0.1 jan 13, 2014 tel: 886-3-5788833 http://www.gmt.com.tw 1 G1614 global mixed-mode technology programmable 12+1+1 channel voltage buffers with nvm for tft lcd features ? supply operation range : 9v to 20v ? 12+1+1 channels : --- 12 channel rail-to-rail programmable gam- ma buffers ? 10 bits resolution for each channel ? 25ma output current for each channel ---1 channel rail-to-rail vcom buffer: ? 10 bits adjustable output ? 100ma output current ? 300ma output short-circuit current ? 50v/ s slew rate ? programmable vcom limits ---1 channel rail-to-rail repair op: ? 30ma output current ? 100ma output short-circuit current ? 15v/ s slew rate ---2 banks registers using bksel to select which bank data output ? 2-wire i 2 c slave mode interface ? non-volatile memory (nvm) store setting (at least 100 re-write times) ? qfn4x4-24 package applications ? tft-lcd monitors ? lcd televisions general description the G1614 consists of 12+1+1 channel buffers target toward the needs of thin film transistor liquid crystal display (tft lcd). this device incorporates 12 gam- ma buffers, one vcom buffer and one repair op which can be programmed through i 2 c interface. it contains two register banks which can store two different sets of gamma and vcom values. each buffer is capable of driving heavy capacitive loads and offering large current loading (vcom: 100ma, gammas: 25ma). the G1614 is available in the qfn4x4-24 package. ordering information order number marking temp. range package (green) G1614q51u 1614 -40 c to 85 c qfn4x4-24 note : q5:qfn4x4-24 1: bonding code u: tape & reel pin configuration typical application circuit G1614 qfn4x4-24 gma8 gma7 opo opi gma6 agnd dvdd scl sda bksel avdd2 gma12 gma11 gma10 gma1 agnd gma2 avdd1 gma4 gma3 gma5 vcom a0 note: recommend connecting the thermal pad to the ground for excellent power dissipation. 1 2 3 4 5 613 14 15 16 17 18 24 19 21 23 22 8 7 9 10 11 12 thermal pad 20 gma9 i 2 c interface 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac gma1 gma2 gma3 gma4 gma5 gma6 gma7 gma8 gma9 gma10 gma11 gma12 agnd dvdd scl sda a0 mtp reg i 2 c reg dac reg avdd1 source driver 18v vcom lcd panel v ref ref bank1 gamma vcom ref bank1 gamma vcom bank2 gamma vcom ref bank1 gamma vcom bank2 gamma vcom mux dac reference 8 1,7 2 3 4 6 bksel 5 24 9 10 11 12 13 14 17 18 19 20 21 22 opo 16 15 avdd2 18v opi 23 G1614 qfn4x4-24 gma8 gma7 opo opi gma6 agnd dvdd scl sda bksel avdd2 gma12 gma11 gma10 gma1 agnd gma2 avdd1 gma4 gma3 gma5 vcom a0 note: recommend connecting the thermal pad to the ground for excellent power dissipation. 1 2 3 4 5 613 14 15 16 17 18 24 19 21 23 22 8 7 9 10 11 12 thermal pad 20 gma9 i 2 c interface 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac gma1 gma2 gma3 gma4 gma5 gma6 gma7 gma8 gma9 gma10 gma11 gma12 agnd dvdd scl sda a0 mtp reg i 2 c reg dac reg avdd1 source driver 18v vcom lcd panel v ref ref bank1 gamma vcom ref bank1 gamma vcom bank2 gamma vcom ref bank1 gamma vcom bank2 gamma vcom mux dac reference 8 1,7 2 3 4 6 bksel 5 24 9 10 11 12 13 14 17 18 19 20 21 22 opo 16 15 avdd2 18v opi 23 i 2 c interface 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac 10-bit dac gma1 gma2 gma3 gma4 gma5 gma6 gma7 gma8 gma9 gma10 gma11 gma12 agnd dvdd scl sda a0 mtp reg i 2 c reg dac reg avdd1 source driver 18v vcom lcd panel v ref ref bank1 gamma vcom ref bank1 gamma vcom bank2 gamma vcom ref bank1 gamma vcom bank2 gamma vcom mux dac reference 8 1,7 2 3 4 6 bksel 5 24 9 10 11 12 13 14 17 18 19 20 21 22 opo 16 15 avdd2 18v opi 23
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