ISL24202IRTZ Datasheet ISL24202IRTZ | P1-P3

Programmable V

COM

Calibrator with EEPROM

ISL24202

The ISL24202 is an 8-bit programmable current sink that can be

used in conjunction with an external voltage divider to generate a

voltage source (V

COM

) positioned between the analog supply

voltage and ground. The current sink’s full-scale range is

controlled by an external resistor, R

SET

. With the appropriate

choice of external resistors R

and R

, the V

COM

voltage range

can be controlled between any arbitrary voltage range. The

ISL24202 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 V

COM

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 V

OUT

pin.

The ISL24202 can be used with a high output drive buffer

amplifier, which allows it to directly drive the V

COM

input of an

LCD panel.

The ISL24202 is available in an 8 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

• 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 8 Ld TDFN (3 x 3 x 0.8mm Max)

Applications

•LCD Panel V

COM

Generator

• Electrophoretic Display V

COM

Generator

Related Literature

• See AN1633 for ISL24202 Evaluation Board Application Note

“ISL24202IRTZ-EVALZ Evaluation Board User Guide” (Coming

Soon)

MICRO-

CONTROLLER

ISL24202

CTL

OUT

SET

LCD PANEL

COM

I/O PIN

I/O PIN*

* 0, 1, TRI-STATE

EL5411T

FIGURE 1. TYPICAL ISL24202 APPLICATION

March 15, 2011

FN7587.0

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

All other trademarks mentioned are the property of their respective owners.

ISL24202

FN7587.0

March 15, 2011

Block Diagram

Pin Descriptions Pin Configuration

ISL24202

(8 LD TDFN)

TOP VIEW

FIGURE 2. BLOCK DIAGRAM OF THE ISL24202

GND

DIGITAL

INTERFACE

DAC

REGISTERS

8-BIT EEPROM

CTL

DNC

SET

OUT

ANALOG DCP

AND

CURRENT SINK

UP/DOWN

COUNTER

BIAS

PIN NAME PIN # FUNCTION

OUT 1 Adjustable Sink Current Output Pin. The sink current into

the 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 8) for

setting the maximum adjustable sink current.

VDD

2 High-Voltage Analog Supply. Bypass to GND with 0.1µF

capacitor.

DNC 3 Do Not Connect to external circuitry. It is acceptable to

ground this pin.

GND 4 Ground connection.

5 Digital power supply input. Bypass to GND with 0.1µF

de-coupling capacitor.

CTL 6 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 OUT sink

current, and lowering the divider voltage at the OUT pin.

A high-to-mid transition decrements the 8-bit counter,

subtracting 1 from the DAC setting, decreasing the OUT

sink current, and increasing the divider voltage at the

OUT pin.

To program the EEPROM, take this pin to >4.9V (see

“CTL EEPROM Programming Signal Time” in the

“Electrical Specifications” table on page 5 for details).

Float when not in use.

CE 7 Counter Enable Pin. Connect CE to V

to enable

adjustment of the output sink current. Float or connect

CE to GND to prevent further adjustment or

programming (Note: the CE pin has an internal 500nA

pull-down sink current). The EEPROM value will be

copied to the register on a V

to V

transition.

SET 8 Maximum Sink Current Adjustment Pin. Connect a

resistor from SET to GND to set the maximum

adjustable sink current of the OUT pin. The maximum

adjustable sink current is equal to (AV

/20) divided

by R

SET

PAD - Thermal pad should be connected to system ground

plane to optimize thermal performance.

(*CONNECT THERMAL PAD TO GND)

OUT

VDD

DNC

GND

SET

CTL

PAD

ISL24202

FN7587.0

March 15, 2011

Ordering Information

PART NUMBER

(Notes 1, 2, 3)

PART

MARKING INTERFACE

TEMP RANGE

(°C)

PACKAGE

(Pb-Free)

PKG.

DWG. #

ISL24202IRTZ 202Z COUNTER -40 to +85 8 Ld 3x3 TDFN L8.3x3A

ISL24202IRTZ-EVALZ Evaluation Board

NOTES:

1. Add “-T*” suffix for tape and reel. Please refer to TB347

for details on reel specifications.

2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte

tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil

Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

3. For Moisture Sensitivity Level (MSL), please see device information page ISL24202

. For more information on MSL please see techbrief TB363.

P1-P3 P4-P6 P7-P9 P10-P12

ISL24202IRTZ

Mfr. #:

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