STVM100:I²C LCD/e-paper VCOM calibrator

The STVM100 is a programmable VCOM adjustment solution for thin-film transistor (TFT) liquid-crystal displays (LCDs) to remove “flickers”. It is also used in e-paper and e-book applications to avoid the “ghosting” effect (residual pixels after display refresh). It can replace a mechanical potentiometer, so that the factory operator can physically view the front screen when performing the VCOM adjustment. This significantly reduces labor costs, increases reliability, and enables automation.

The STVM100 provides a digital I2C interface to control the sink current output (IOUT). This output drives an external resistive voltage divider, which can then be applied to an external VCOMbuffer. Three external resistors R1, R2, and RSET determine the highest and lowest value of the VCOM. An increase in the output sink current will lower the voltage on the external divider so that the VCOMcan be adjusted by 128 steps within this range. Once the desired VCOMsetting is achieved, it can be stored in the internal EEPROM that will be automatically recalled during each power-up.

The STVM100 is available in an 8-pin, 3 mm x 3 mm TDFN8 or 3 mm x 3 mm TSSOP8 package.

Key Features

  • I2C interface, slave address: 1001111
  • 7-bit adjustable sink current output
  • 2.25 V to 3.6 V logic supply voltage VDD
  • AVDD operating voltages
    • 4.5 V to 20 V for VDD from 2.6 V to 3.6 V
    • 4.5 V to 13 V for VDD from 2.25 V to 3.6 V
  • EEPROM for storing the optimum VCOM setting
  • Guaranteed monotonic output over operating range
  • 400 kHz maximum interface bus speed
  • Operating temperature: –40 °C to 85 °C
  • Available in an 8-pin 3 mm x 3 mm TDFN8 or 3 mm x 3 mm TSSOP8 package
Product Specifications
DescriptionVersionSize
DS5122: I2C LCD/e-paper VCOM calibrator9.0695 KB
Application Notes
DescriptionVersionSize
AN3110: Using the STVM100 to automatically adjust VCOM voltage in e-paper1.1270 KB
AN2686: Using the STVM100 to fully auto adjust LCD flicker1.3519 KB
Sample & Buy
Part NumberPackagePacking TypeOperating Temperature (°C) (min)Operating Temperature (°C) (max)Unit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
STVM100DC6FDFN8 3x3x0.75Tape And Reel--0.591000NECEAR99MALAYSIA
STVM100DS6FMSOP/TSSOP 8Tape And Reel--0.591000NECEAR99MALAYSIA
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
STVM100DC6FDFN8 3x3x0.75IndustrialEcopack3md_ez-wspc-dfn-wspc-8l-wspc-3x3x.75mm-wspc-pitch-wspc-0.65_ahez-wspc-k6laa10.pdf
md_ez-wspc-dfn-wspc-8l-wspc-3x3x.xml
STVM100DS6FMSOP/TSSOP 8IndustrialEcopack3md_msoptssop-wspc-8-wspc-body3.00-wspc-pitch0.65_ade3klaa10-wspc-(stvm100ds6f)_wpc_ver2_signed.pdf
md_msoptssop-wspc-8-wspc-body3.00-wspc-pitch0.65_ade3klaa10-wspc-(stvm100ds6f)_wpc_ver2.xml
I2C LCD/e-paper VCOM calibrator STVM100
circuit_diagram_13236_thumbnail.png STVM100
Using the STVM100 to automatically adjust VCOM voltage in e-paper STVM100
Using the STVM100 to fully auto adjust LCD flicker STVM100
md_ez-wspc-dfn-wspc-8l-wspc-3x3x.75mm-wspc-pitch-wspc-0.65_ahez-wspc-k6laa10.pdf STVM100
md_ez-wspc-dfn-wspc-8l-wspc-3x3x.xml STVM100
md_msoptssop-wspc-8-wspc-body3.00-wspc-pitch0.65_ade3klaa10-wspc-(stvm100ds6f)_wpc_ver2_signed.pdf STVM100
md_msoptssop-wspc-8-wspc-body3.00-wspc-pitch0.65_ade3klaa10-wspc-(stvm100ds6f)_wpc_ver2.xml STVM100