stvm100 STMicroelectronics, stvm100 Datasheet - Page 11

• Manufacturer Part Number: stvm100
• Description: I2c Lcd Vcom Calibrator
• Manufacturer: STMicroelectronics

3
Note:
Application information
The STVM100 is a programmable V
provides a digital I
external resistive voltage divider, which can then be applied to an external V
The highest and lowest V
connection is shown in
The sink current from the STVM100 OUT pin is given in
through R
Figure 8.
Equation 1
“D” is a user-selected value, an integer ranging from 0 to 127.
The V
Equation 2
COM
SET
value can be obtained in
R
. This current must be less than 120µA (see I
1
, R
2
2
C interface to control the sink current output. This output drives an
, and R
V
COM
Figure
STVM100
COM
AV DD
AV DD
SET
SET
=
OUT
R SET
value is determined by three resistors, R
8.
connection
-------------------- AV
R
1
I
OUT
R
+
2
I OUT
COM
Equation
R
2
=
AV DD
calibrator for the TFT-LCD to remove flickers. It
D
------------- -
128
R1
R2
+
DD
2.
1
⎛
⎝
1
+
–
------------------------- -
20 R
–
AV
D
------------- -
128
+
DD
SET
1
Equation
SET
------------------------- -
20 R
V COM
R
value in
SET
1
AI12933
1. This current then flows
⎞
⎠
1
Table 7 on page
, R
2
, and R
COM
buffer.
SET
. The
11/27
15).