DS3503_09 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – NV, I2C, Stepper Potentiometer

Rev 1; 3/09
NV, I²C, Stepper Potentiometer
General Description
The DS3503 features two synchronized stepping digital
potentiometers: one 7-bit potentiometer with RW as its
output, and another potentiometer with Y as its output.
Both potentiometers reference the RH and RL terminals
and feature an output voltage range of up to 15.5V. In
addition, both potentiometer outputs can be stepped
up and down by configuring the control registers.
Programming is accomplished by an I²C-compatible
interface that can operate at speeds of up to 400kHz.
Applications
TFT-LCD VCOM Calibration
Instrumentation and Industrial Controls
Mechanical Potentiometer Replacement
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS3503U+
-40°C to +100°C
10 μSOP
DS3503U+T&R
-40°C to +100°C
10 μSOP
+Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
Typical Operating Circuit appears at end of data sheet.
Features
♦ 128 Wiper Tap Points
♦ Full-Scale Resistance: 5kΩ
♦ Programmable Logic Lets WR Step Up and Down
with Timing Controlled by SYNC Input
♦ Second Potentiometer Output Pin (Y) Centered at
Position 40h
♦ I²C-Compatible Serial Interface
♦ Digital Operating Voltage: 2.7V to 3.6V
♦ Analog Operating Voltage: 4.5V to 15.5V
♦ Operating Temperature: -40°C to +100°C
♦ 10-Pin µSOP Package
Pin Configuration
TOP VIEW
SDA 1
GND 2
V_CC 3
SYNC 4
Y5
DS3503
μSOP
10 SCL
9 V+
8 RL
7 RW
6 RH
SCL
SDA
V+
V_CC
GND
SYNC
RH
I²C WR BUS
SCL
OUT
SDA
IVR
EEPROM
ADDRESS
MUX
I
O
WR
REGISTER
7-BIT
POT
I²C
LOGIC
I²C RD BUS
ADDRESS
RL
RH
COUNT
STEP CONTROL
REGISTER
CODE 64
7-BIT
STEP
(40h)
POT
PERIOD (2 BITS)
COUNTER
AND
STEP COUNT (2 BITS)
CONTROL
LOGIC
DS3503
RL
Functional Diagram
WR+STEPCOUNT
1 LSB
WR
RW
PERIOD
WR-STEPCOUNT
CODE 64 (40h) + STEPCOUNT
1 LSB
Y
CODE 64
(40h)
PERIOD
CODE 64 (40h) - STEPCOUNT
________________________________________________________________ Maxim Integrated Products 1
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or visit Maxim’s website at www.maxim-ic.com.