isl24212 Intersil Corporation, isl24212 Datasheet - Page 2

• Manufacturer Part Number: isl24212
• Description: Programmable Vcom Calibrator With Eeprom And Output Buffer
• Manufacturer: Intersil Corporation

Block Diagram
Pin Configuration
Pin Descriptions
DVR_OUT
NAME
AV
DNC
GND
V
CTL
PIN
IN
DD
DD
N
DNC
NUMBER
CTL
CE
PIN
1
2
3
4
5
6
7
4
7
8
Negative input of the op amp. To create a unity-gain V
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.
High-Voltage Analog Supply. Bypass to GND with 0.1µF capacitor.
Do Not Connect to external circuitry. It is acceptable to ground this pin.
Ground connection.
Digital power supply input. Bypass to GND with 0.1µF capacitor.
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.
INTERFACE
DIGITAL
CS
2
V
DD
6
COUNTER
UP/DOWN
FIGURE 2. BLOCK DIAGRAM OF THE ISL24212
DVR_OUT
8-Bit EEPROM
(*CONNECT THERMAL PAD TO GND)
REGISTERS
AV
DNC
GND 5
DAC
IN
DD
N
1
ISL24212
2
3
4
(10 LD TDFN)
ISL24212
TOP VIEW
EXPOSED
THERMAL
GND
AV
PAD*
3
DD
5
COM
CURRENT SINK
voltage buffer, connect this pin to the VCOM_OUT pin.
ANALOG DCP
FUNCTION
10
8
9
7
6 V
AND
A1
VCOM_OUT
SET
CE
CTL
DD
Q1
V
COM
AMPLIFER
A2
BUFFER
1
2
9
10
DVR_OUT
VCOM_OUT
IN
SET
N
March 15, 2011
FN7590.0