Key facts
- Brand
- STMicroelectronics
- Model
- STVM100
- Category
- Other Electronics
- Documents
- 3
- Languages
- EN
- Last added
- 2012-08-09
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STMicroelectronics STVM100 I2C LCD/e-paper VCOM Calibrator Datasheet
The STVM100 is a programmable VCOM adjustment solution designed for thin-film transistor (TFT) liquid-crystal displays (LCDs) and e-paper applications. It functions as a digital replacement for mechanical potentiometers to remove flickers in LCDs and avoid the ghosting effect in e-paper displays. The device features an I2C interface and an adjustable sink current output to drive an external resistive voltage divider for VCOM adjustment.
The STVM100 allows factory operators to physically view the screen during VCOM adjustment, significantly reducing labor costs and enabling automation. Once the desired VCOM setting is achieved, it is stored in an internal EEPROM and automatically recalled during each power-up. The device is available in 8-pin TDFN8 or TSSOP8 packages and operates with logic supply voltages from 2.25 V to 3.6 V.
STMicroelectronics STVM100 specifications
| Interface | I2C interface, slave address: 1001111 |
|---|---|
| Logic supply voltage | 2.25 V to 3.6 V |
| AVDD operating voltage (VDD 2.6V to 3.6V) | 4.5 V to 20 V |
| AVDD operating voltage (VDD 2.25V to 3.6V) | 4.5 V to 13 V |
| Maximum interface bus speed | 400 kHz |
| Operating temperature | -40 °C to 85 °C |
| Package options | 8-pin 3 mm x 3 mm TDFN8 or TSSOP8 |
Source: STMicroelectronics STVM100 I2C LCD/e-paper VCOM Calibrator Datasheet
All STMicroelectronics STVM100 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What is the slave address for the STVM100?
The slave address is 1001111.
From: STMicroelectronics STVM100 I2C LCD/e-paper VCOM Calibrator Datasheet
How does the STVM100 store VCOM settings?
The desired VCOM setting is stored in an internal EEPROM and is automatically recalled during each power-up.
From: STMicroelectronics STVM100 I2C LCD/e-paper VCOM Calibrator Datasheet
What is the gray scale accuracy of the STVM100?
The STVM100 provides a gray scale accuracy out of a range of 128.
From: STMicroelectronics AN2686 Application Note Using the STVM100 to Fully Auto Adjust LCD Flicker
How long does the average adjustment time take?
The system offers fast adjusting with an average time of less than 3.2 seconds.
From: STMicroelectronics AN2686 Application Note Using the STVM100 to Fully Auto Adjust LCD Flicker
How does the auto-adjustment kit determine the target VCOM?
It allows the user to input the target value manually or by scanning a barcode on the e-paper PC board.
What is the maximum error achieved by the auto-adjustment kit?
The test results show a maximum difference of 11 mV between the target voltage and the measured voltage.