ISL24211_14 Datasheet, PDF (2/12 Pages) Intersil Corporation – Programmable VCOM Calibrator with EEPROM and Output Buffer

ISL24211
Block Diagram
VDD
6
AVDD
3
7
SDA
8
SCL
I²C INTERFACE
4
WP
CS
DAC
REGISTERS
8-Bit EEPROM
ANALOG DCP
AND
CURRENT SINK
Q1
A1
5
GND
FIGURE 2. BLOCK DIAGRAM OF THE ISL24211
VCOM BUFFER
AMPLIFER
2
DVR_OUT
10
A2
VCOM_OUT
1
INN
9
SET
Pin Configuration
ISL24211
(10 LD TDFN)
TOP VIEW
IN_N 1
DVR_OUT 2
AVDD 3
WP 4
GND 5
EXPOSED
THERMAL
PAD*
10 VCOM_OUT
9 SET
8 SCL
7 SDA
6 VDD
(*THERMAL PAD CONNECTS TO GND)
Pin Descriptions
PIN
NAME
PIN
NUMBER
FUNCTION
IN_N
DVR_OUT
1
Negative (inverting) input of the V_COM buffer op
amp. This pin is used to provide feedback from
the end point of the V_COM trace.
2 Adjustable Sink Current Output Pin. The current
sunk into the DVR_OUT pin is equal to the DAC
setting times the maximum adjustable sink
current divided by 256. See the “SET” pin
function description below (pin 9) for the
maximum adjustable sink current setting. Also
tied to the non-inverting input of buffer amp.
AV_DD
3 Analog Power Supply Input. Bypass to GND
with 0.1µF capacitor.
WP
4 EEPROM Write Protect. Active Low.
0 = Programming disabled; 1 = Programming
allowed.
GND
5 Ground connection.
V_DD
6 Digital power supply input. Bypass to GND with
0.1µF capacitor.
SDA
7
I²C Serial Data Input
SCL
8
I²C Clock Input
SET
VCOM_OUT
9 Maximum Sink Current Adjustment Point.
Connect a resistor from SET to GND to set the
maximum adjustable sink current of the
DVR_OUT pin. The maximum adjustable sink
current is equal to (AV_DD/20) divided by R_SET.
10 Output of the buffer amplifier
PAD
-
Thermal pad should be connected to system
ground plane to optimize thermal performance.
2
FN7585.0
February 23, 2011