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LM8342

LM8342 Programmable TFT VCOM Calibrator with Non-Volatile Memory

FEATURES ?I2CCompatibleProgrammableDACtoSetthe OutputCurrent ?EnsuredMonotonicDAC ?Non-VolatileMemorytoHoldtheSetting ?EEPROMinSystemProgrammable ?NoExternalProgrammingVoltageRequired ?MaximumInterfaceBusSpeedis400kHz ?SON-10Package APPLICATIONS ?TFT

LM8342

具有非易失性存儲器的可編程 TFT Vcom 校準(zhǔn)器; ? I2C Compatible Programmable DAC to Set the Output Current\n? Ensured Monotonic DAC\n? Non-Volatile Memory to Hold the Setting\n? EEPROM in System Programmable\n? No External Programming Voltage Required\n? Maximum Interface Bus Speed is 400 kHz\n? SON-10 Package;

The LM8342 is an integrated combination of a non-volatile register (7 bits EEPROM) and a DAC controlled current source. Using the LM8342, the VCOM calibration procedure is simplified by elimination of the potentiometer adjustment task. This adjustment task is currently performed at the factory using a trimmer adjustment tool and visual inspection.The VCOM adjustment can be done electronically in production, using the I2C compatible interface. The factory operator can physically view the screen head-on (frontal viewing) when performing this step, easing manufacturing especially for large TFT panels.The VCOM level is typically at half AVDD (determined by R1 and R2) and is buffered by the actual VCOM driver. By controlling the level of IOUT, the VCOMlevel can be tuned. The current level at the output of the LM8342 is a fraction (1/128 to 128/128) of a maximum current which is set by RSET and an analog reference (AVDD). The actual fraction is determined by the 7-bit DAC. As a result, the output current of the LM8342 has a good temperature stability yielding a very stable VCOM adjustment. Controlling the DAC setting of the LM8342 is done via its I2C compatible interface. The actual DAC setting is stored in a volatile register. Using a “Write to EE” command the data can be stored permanently in the embedded EEPROM. At power on of the device, the EEPROM data is copied to the volatile register, setting the DAC. At any time, the data in the EEPROM can be changed again via the I2C compatible interface.

LM8342

Programmable TFT VCOM Calibrator with Non-Volatile

LM8342

Programmable TFT V Calibrator with Non-Volatile Memory

LM8342SD/NOPB.A

絲?。?a target="_blank" title="Marking" href="/l8342/marking.html">L8342；Package：WSON；LM8342 Programmable TFT VCOM Calibrator with Non-Volatile Memory

FEATURES ?I2CCompatibleProgrammableDACtoSetthe OutputCurrent ?EnsuredMonotonicDAC ?Non-VolatileMemorytoHoldtheSetting ?EEPROMinSystemProgrammable ?NoExternalProgrammingVoltageRequired ?MaximumInterfaceBusSpeedis400kHz ?SON-10Package APPLICATIONS ?TFT

LM8342SDSLASHNOPB

LM8342 Programmable TFT VCOM Calibrator with Non-Volatile Memory

FEATURES ?I2CCompatibleProgrammableDACtoSetthe OutputCurrent ?EnsuredMonotonicDAC ?Non-VolatileMemorytoHoldtheSetting ?EEPROMinSystemProgrammable ?NoExternalProgrammingVoltageRequired ?MaximumInterfaceBusSpeedis400kHz ?SON-10Package APPLICATIONS ?TFT

LM8342SDSLASHNOPB.A

絲?。?a target="_blank" title="Marking" href="/l8342/marking.html">L8342；Package：WSON；LM8342 Programmable TFT VCOM Calibrator with Non-Volatile Memory

FEATURES ?I2CCompatibleProgrammableDACtoSetthe OutputCurrent ?EnsuredMonotonicDAC ?Non-VolatileMemorytoHoldtheSetting ?EEPROMinSystemProgrammable ?NoExternalProgrammingVoltageRequired ?MaximumInterfaceBusSpeedis400kHz ?SON-10Package APPLICATIONS ?TFT

LM8342SDX/NOPB

絲印：L8342；Package：WSON；LM8342 Programmable TFT VCOM Calibrator with Non-Volatile Memory

FEATURES ?I2CCompatibleProgrammableDACtoSetthe OutputCurrent ?EnsuredMonotonicDAC ?Non-VolatileMemorytoHoldtheSetting ?EEPROMinSystemProgrammable ?NoExternalProgrammingVoltageRequired ?MaximumInterfaceBusSpeedis400kHz ?SON-10Package APPLICATIONS ?TFT

LM8342SDX/NOPB.A

絲?。?a target="_blank" title="Marking" href="/l8342/marking.html">L8342；Package：WSON；LM8342 Programmable TFT VCOM Calibrator with Non-Volatile Memory

FEATURES ?I2CCompatibleProgrammableDACtoSetthe OutputCurrent ?EnsuredMonotonicDAC ?Non-VolatileMemorytoHoldtheSetting ?EEPROMinSystemProgrammable ?NoExternalProgrammingVoltageRequired ?MaximumInterfaceBusSpeedis400kHz ?SON-10Package APPLICATIONS ?TFT

LM8342SDXSLASHNOPB

絲?。?a target="_blank" title="Marking" href="/l8342/marking.html">L8342；Package：WSON；LM8342 Programmable TFT VCOM Calibrator with Non-Volatile Memory

FEATURES ?I2CCompatibleProgrammableDACtoSetthe OutputCurrent ?EnsuredMonotonicDAC ?Non-VolatileMemorytoHoldtheSetting ?EEPROMinSystemProgrammable ?NoExternalProgrammingVoltageRequired ?MaximumInterfaceBusSpeedis400kHz ?SON-10Package APPLICATIONS ?TFT