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The ISL24212 is an 8-bit programmable current sink that can be used in conjunction with an external voltage divider to generate a voltage source (V_COM) positioned between the analog supply voltage and ground. The current sinks full-scale range is controlled by an external resistor, R_SET. With the appropriate choice of external resistors R₁ and R₂, the V_COM voltage range can be controlled between any arbitrary voltage range. The ISL24212 has an 8-bit data register and 8-bit EEPROM for storing both a volatile and a permanent value for its output, accessible through a single up/down counter interface pin (CTL). After the part is programmed with the desired V_COM value, the Counter Enable pin (CE) can be grounded to prevent further changes. On every power-up, the EEPROM contents are automatically transferred to the data register and the pre-programmed output voltage appears at the VCOM_OUT pin.

The ISL24212 also features an integrated, wide-bandwidth, high output drive buffer amplifier that can directly drive the V_COM input of an LCD panel.

The ISL24212 is available in an 10 Ld 3mm x 3mm TDFN package. This package has a maximum height of 0.8mm for very low profile designs. The ambient operating temperature range is -40°C to +85°C.

Key Features

• Adjustable 8-bit, 256-Step, Current Sink Output
• 60MHz VCOM Buffer/Amplifier
• On-Chip 8-Bit EEPROM
• Up/Down Counter Interface
• Guaranteed Monotonic Over-Temperature
• 4.5V to 19.0V Analog Supply Range for Normal Operation (10.8V Minimum Analog Supply Voltage for Programming)
• 2.25V to 3.6V Logic Supply Voltage Operating Range
• Pb-free (RoHS-compliant)
• Ultra-Thin 10 Ld TDFN (3x3x0.8mm max)

Applications

• LCD Panel VCOM Generator
• Electrophoretic Display VCOM Generator