ISL24202
Programmable V_COM Calibrator with EEPROM

Key Features

• Adjustable 8-Bit, 256-Step, Current Sink Output
• 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 8 Ld TDFN (3 x 3 x 0.8mm Max)

Description

The ISL24202 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 R₁2, the V_COM voltage range can be controlled between any arbitrary voltage range. The ISL24202 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 V_OUT pin.

The ISL24202 can be used with a high output drive buffer amplifier, which allows it to directly drive the V_COM input of an LCD panel.

The ISL24202 is available in an 8 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.

Applications

• LCD Panel V_COM Generator
• Electrophoretic Display V_COM Generator