MAX9665/MAX9666/MAX9667 19-5000 Rev 4 7/10 6/8/10-Channel, 10-Bit, Nonvolatile Programmable Gamma and VCOM Reference Voltages General Description Features The MAX9665/MAX9666/MAX9667 provide multiple 6/8/10 Channels Gamma Correction, 10-Bit programmable reference voltages for gamma correc- Resolution tion in TFT LCDs and a programmable reference volt- VCOM Driver age for VCOM adjustment. All gamma and VCOM reference voltages have a 10-bit digital-to-analog con- Integrated Multiple-Time Programmable Memory verter (DAC) and buffer with high peak current. This DAC Reference Input reduces the recovery time of the output voltage when critical levels and patterns are displayed. 2 Single-Wire and I C Programming of VCOM These devices include multiple-time programmable Reference (MTP) memory to store gamma and VCOM codes on 950mA Peak Transient Current on VCOM Channel the chip, eliminating the need for external EEPROM. The MTP memory supports up to 300 write operations. 2 The MAX9665/MAX9666/MAX9667 feature an I C inter- Functional Diagrams face to control the programmable reference voltages and a single-wire interface to toggle the VCOM refer- ence voltage up or down. AVDD REF Applications TFT LCDs 10 OUT0 DAC Ordering Information GAMMA PIN- OUT1 10 DAC PART TEMP RANGE CHANNELS PACKAGE MAX9665ETP+ 6 -40 C to + 85 C 20 TQFN-EP* OUT2 10 DAC MAX9666ETP+ 8 -40 C to + 85 C 20 TQFN-EP* MAX9667ETP+ 10 -40 C to + 85 C 20 TQFN-EP* +Denotes a lead(Pb)-free/RoHS-compliant package. 2 OUT3 I C 10 MTP DAC REGISTERS MEMORY *EP = Exposed pad. Pin Configurations 10 OUT4 DAC TOP VIEW 10 OUT5 DAC 15 14 13 12 11 10 OUT3 REF 16 VCOM 10 DAC 9 N.C. AVDD 17 FB FB 18 8 OUT4 DVDD MAX9665 SCL 2 I C VCOM 19 7 N.C. SDA CE MAX9665 CTL CTL 20 6 OUT5 SINGLE-WIRE EP* + INTERFACE GND 12 3 4 5 Functional Diagrams continued at end of data sheet. THIN QFN 5mm x 5mm *EP = EXPOSED PAD. CONNECT TO DIGITAL GROUND PLANE. Pin Configurations continued at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. CE OUT0 DVDD N.C. SCL OUT1 N.C. SDA OUT2 GND6/8/10-Channel, 10-Bit, Nonvolatile Programmable Gamma and VCOM Reference Voltages ABSOLUTE MAXIMUM RATINGS Supply Voltages Continuous Power Dissipation (T = +70C) A AVDD to GND.....................................................-0.3V to +22V 20-Pin TQFN (derate 25.6mW/C above +70C) ....2051.3mW DVDD to GND.......................................................-0.3V to +4V Junction-to-Case Thermal Resistance ( ) (Note 1) JC Outputs 20-Pin TQFN...................................................................6C/W OUT0OUT9, VCOM to GND .............-0.3V to (V + 0.3V) Junction-to-Ambient Thermal Resistance ( ) (Note 1) AVDD JA Inputs 20-Pin TQFN.................................................................39C/W SDA, SCL, CE to GND..........................................-0.3V to +4V Operating Temperature Range ...........................-40C to +85C CTL, REF to GND ...............................................-0.3V to +22V Junction Temperature......................................................+150C FB to GND ..........................................-0.3V to (V + 0.3V) Storage Temperature Range .............................-65C to +150C AVDD Continuous Current Lead Temperature (soldering, 10s) .................................+300C OUT0OUT9, VCOM...................................................400mA Soldering Temperature (reflow) .......................................+260C All Other Pins................................................................50mA Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four- layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = V = 15.7V, V = 3.3V, V = 0V, VCOM connected to FB, CTL = DVDD/2, no load, T = -40C to +85C, unless AVDD REF DVDD GND A otherwise noted. Typical values are at T = +25C.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SUPPLIES Guaranteed by power-supply rejection Analog-Supply Voltage Range V 920V AVDD ratio specification (Note 3) Analog-Supply Voltage Range for V 15 20 V AVDD MTP Programming MTP Digital-Supply Voltage Range V 2.7 3.6 V DVDD MAX9665 12 22 Analog Quiescent Current I MAX9666 14 24 mA AVDD MAX9667 16 26 Digital Quiescent Current I No SCL or SDA transitions 450 900 A DVDD DVDD Undervoltage Lockout UVLO 2.3 2.6 V DAC Resoluti on 10 Bits Integr al N onli neari ty Er r or INLT = +25C, 16 CODE 1008 1 LSB A D i fferent ial N onli neari ty Er r or DN LT = +25C, 16 CODE 1008 1 LSB A REF Input Resistance 384 k GAMMA OUTPUTS (Note 4) S hort- C i r cuit C urr ent I Output to AVD D or GN D , T = +25C 100 400 mA S C A M axim um C apaci ti v e Load Placed directly at output 300 pF Output Impedance Z Output resistance when output is disabled 84 k O Load Re gul ati on R - 5m A to +5m A 0.5 mV/mA EG Total Ou tput E r r or T = +25C, m easured at c ode = 512 -40 +40 mV A S l ew R ate SR5 V sw i ng, m easure 10% to 90% 22 V/s 2 MAX9665/MAX9666/MAX9667