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Vcom Calibrator. ISL24212 Datasheet

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Vcom Calibrator. ISL24212 Datasheet






ISL24212 Calibrator. Datasheet pdf. Equivalent






ISL24212 Calibrator. Datasheet pdf. Equivalent


ISL24212

Part

ISL24212

Description

Programmable Vcom Calibrator



Feature


DATASHEET ISL24212 Programmable VCOM Ca librator with EEPROM and Output Buffer FN7590 Rev 0.00 March 15, 2011 The IS L24212 is an 8-bit programmable current sink that can be used in conjunction w ith an external voltage divider to gene rate a voltage source (VCOM) positioned between the analog supply voltage and ground. The current sink’s full-scale range is controlled.
Manufacture

Renesas

Datasheet
Download ISL24212 Datasheet


Renesas ISL24212

ISL24212; by an external resistor, RSET. With the appropriate choice of external resisto rs R1 and R2, the VCOM voltage range ca n be controlled between any arbitrary v oltage range. The ISL24212 has an 8-bit data register and 8-bit EEPROM for sto ring both a volatile and a permanent va lue for its output, accessible through a single up/down counter interface pin (CTL). After the p.


Renesas ISL24212

art is programmed with the desired VCOM 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 d ata register and the pre-programmed out put voltage appears at .

Part

ISL24212

Description

Programmable Vcom Calibrator



Feature


DATASHEET ISL24212 Programmable VCOM Ca librator with EEPROM and Output Buffer FN7590 Rev 0.00 March 15, 2011 The IS L24212 is an 8-bit programmable current sink that can be used in conjunction w ith an external voltage divider to gene rate a voltage source (VCOM) positioned between the analog supply voltage and ground. The current sink’s full-scale range is controlled.
Manufacture

Renesas

Datasheet
Download ISL24212 Datasheet




 ISL24212
DATASHEET
ISL24212
Programmable VCOM Calibrator with EEPROM and Output Buffer
FN7590
Rev 0.00
March 15, 2011
The ISL24212 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 ISL24212 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 VCOM 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 VCOM_OUT pin.
The ISL24212 also features an integrated, wide-bandwidth,
high output drive buffer amplifier that can directly drive the
VCOM input of an LCD panel.
The ISL24212 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.
Features
• Adjustable 8-bit, 256-Step, Current Sink Output
• 60MHz VCOM Buffer/Amplifier
• 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 10 Ld TDFN (3x3x0.8mm max)
Applications
• LCD Panel VCOM Generator
• Electrophoretic Display VCOM Generator
Related Literature
• See Application Note “ISL24212IRTZ-EVALZ Evaluation
Board User Guide” (Coming Soon)
VDD
AVDD
MICRO-
CONTROLLER
I/O PIN*
I/O PIN
* 0, 1, TRISTATE
7
CTL
8
CE
63
2
DVR_OUT
ISL24212
1
INN
10
VCOM_OUT
R1
R2
9
SET
RSET
5
FIGURE 1. TYPICAL ISL24212 APPLICATION
LCD PANEL
VCOM
FN7590 Rev 0.00
March 15, 2011
Page 1 of 12




 ISL24212
ISL24212
Block Diagram
VDD
6
AVDD
3
DNC 4
CTL 7
CE 8
DIGITAL UP/DOWN
DAC
INTERFACE COUNTER REGISTERS
8-Bit EEPROM
CS
ANALOG DCP
AND
CURRENT SINK
Q1
A1
Pin Configuration
5
GND
FIGURE 2. BLOCK DIAGRAM OF THE ISL24212
ISL24212
(10 LD TDFN)
TOP VIEW
VCOM BUFFER
AMPLIFER
2
DVR_OUT
10
A2 VCOM_OUT
1
INN
9
SET
INN 1
DVR_OUT 2
AVDD 3
DNC 4
GND 5
10 VCOM_OUT
EXPOSED
THERMAL
PAD*
9 SET
8 CE
7 CTL
6 VDD
(*CONNECT THERMAL PAD TO GND)
Pin Descriptions
PIN PIN
NAME NUMBER
FUNCTION
INN
DVR_OUT
1 Negative input of the op amp. To create a unity-gain VCOM voltage buffer, connect this pin to the VCOM_OUT pin.
2 Current Sink Output. The sink current into the DVR_OUT (Digital Variable Resistor) pin is equal to the DAC setting times the maximum
adjustable sink current divided by 256. See the “SET” pin function description (pin 9) for setting the maximum adjustable sink
current.
AVDD
DNC
3 High-Voltage Analog Supply. Bypass to GND with 0.1µF capacitor.
4 Do Not Connect to external circuitry. It is acceptable to ground this pin.
GND 5 Ground connection.
VDD 6 Digital power supply input. Bypass to GND with 0.1µF capacitor.
CTL 7 Up/Down Control for internal counter and Internal EEPROM Programming Control Input. When CE is high:
A low-to-mid transition increments the 8-bit counter, adding 1 to the DAC setting, increasing the DVR_OUT sink current, and
lowering the divider voltage at the DVR_OUT pin.
A high-to-mid transition decrements the 8-bit counter, subtracting 1 from the DAC setting, decreasing the DVR_OUT sink current,
and increasing the divider voltage at the DVR_OUT pin.
To program the EEPROM, take this pin to >4.9V (see “CTL EEPROM Programming Signal Time” in the “Electrical Specification”
table on page 5 for details). Float when not in use.
FN7590 Rev 0.00
March 15, 2011
Page 2 of 12



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