ISL24211

Programmable VCOM Calibrator with EEPROM and Output Buffer

Product Status: Mass Production

OVERVIEW

The ISL24211 is an 8-bit programmable current sink that can be used in conjunction with an external voltage divider to generate a voltage source (VCOM ) positioned between the analog supply voltage and ground. The current sink's full-scale range is controlled by an external resistor, RSET . With the appropriate choice of external resistors R1 and R2 , the VCOM voltage range can be controlled between any arbitrary voltage range. The ISL24211 has an 8-bit data register and 8-bit EEPROM for storing both a volatile and a permanent value for its output, with an I2 C interface to read and write to the register and EEPROM. After the part is programmed, the I2 C interface is no longer needed; on power-up the EEPROM contents are automatically transferred to the data register, and the
pre-programmed output voltage appears on the VCOM_OUT pin.

The ISL24211 also features an integrated, wide-bandwidth, high output drive buffer amplifier that can directly drive the VCOM input of an LCD panel.

The ISL24211 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

  • 8-bit, 256-Step, Adjustable Sink Current Output
  • 60MHz VCOM Buffer/Amplifier
  • 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
  • 400kHz, I2C Interface
  • On-Chip 8-Bit EEPROM
  • Guaranteed Monotonic Over-Temperature
  • Compatible with applications using the 7-bit ISL45041
  • Pb-free (RoHS-compliant)
  • Ultra-Thin 10 Ld TDFN (3 x 3 x 0.8mm max)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL24211
Basic Information
Production Status
Mass Production
VS (min)
4.5 V
VS (max)
20 V
Resolution Bits
8
EEPROM
Yes
Bus/Output Interface
I2C
Bandwidth (MHz)
60
Slew Rate
93 V/μs
Slew Rate
116 V/μs
Qualification Level
Standard
Temperature Range
-40 to +85

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