The DS3501 is a 7-bit, nonvolatile (NV) digital poten-
tiometer featuring an output voltage range of up to 15.5V.
Programming is accomplished by an I
2
C-compatible
interface, which can operate at speeds of up to 400kHz.
External voltages are applied at the RL and RH inputs to
define the lowest and highest potentiometer outputs.
The DS3501 contains an on-chip temperature sensor
and associated analog-to-digital converter (ADC). The
ADC output addresses a 36-word NV lookup table
(LUT). The LUT output can drive the pot directly or be
added to an NV initial-value register (IVR) to drive the
pot. This flexible LUT-based architecture allows the
DS3501 to provide a temperature-compensated poten-
tiometer output with arbitrary slope.
Features
♦
128 Wiper Tap Points
♦
Full-Scale Resistance: 10kΩ
♦
On-Chip Temperature Sensor and ADC
♦
36-Byte Lookup Table (LUT)
♦
I
2
C-Compatible Serial Interface
♦
Address Pins Allow Up to Four DS3501s to Share
the Same I
2
C Bus
♦
Digital Operating Voltage: 2.7V to 5.5V
♦
Analog Operating Voltage: 4.5V to 15.5V
♦
Operating Temperature: -40°C to +100°C
♦
Pin and Software Compatible with ISL95311
(Default Mode)
♦
10-Pin μSOP Package
DS3501
Applications
TFT-LCD V
COM
Calibration
Linear and Nonlinear Compensation
Instrumentation and Industrial Controls
Mechanical POT Replacement
Optical Transceivers
Pin Configuration and Typical Operating Circuit appear at
end of data sheet.
Ordering Information
PART
DS3501U+
DS3501U+T&R
TEMP RANGE
-40°C to +100°C
-40°C to +100°C
PIN-PACKAGE
10 µSOP
10 µSOP
+Denotes
a lead-free package.
T&R denotes tape-and-reel.
Functional Diagram
RH
127
SDA
SCL
VOLATILE
WIPER REGISTER
126
125
∑
DS3501
DECODER
LEVEL
SHIFTER
2
NV IVR
36-BYTE
LUT
NV
MEMORY
1
A1
A0
CONTROL
CIRCUITRY
AND ADDRESS
DECODE
0
TEMP
SENSOR
AND ADC
RL
RW
______________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
High-Voltage, NV, I
2
C POT with Temp Sensor
and Lookup Table
DS3501
ABSOLUTE MAXIMUM RATINGS
Voltage Range on V
CC
Relative to GND ...............-0.5V to +6.0V
Voltage Range on V+ Relative to GND ..................-0.5V to +17V
Voltage Range on SDA, SCL, A0, A1
Relative to GND..........-0.5V to (V
CC
+ 0.5V), not to exceed 6.0V
Voltage Range on RH, RL, RW...................................-0.5V to V+
Voltage Range Across RH and RL Pins .....................-0.5V to V+
Operating Temperature Range .........................-40°C to +100°C
Programming Temperature Range .........................0°C to +70°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature .......................................See IPC/JEDEC
J-STD-020 Specification
Maximum RW Current ...........................................................1mA
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
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