Rev 0; 1/07
2
High-Voltage, NV, I C POT with Temp Sensor
and Lookup Table
DS3501
General Description
Features
The DS3501 is a 7-bit, nonvolatile (NV) digital poten-
tiometer featuring an output voltage range of up to 15.5V.
♦ 128 Wiper Tap Points
♦ Full-Scale Resistance: 10kΩ
2
Programming is accomplished by an I C-compatible
♦ On-Chip Temperature Sensor and ADC
♦ 36-Byte Lookup Table (LUT)
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.
2
♦ I C-Compatible Serial Interface
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.
♦ Address Pins Allow Up to Four DS3501s to Share
2
the Same I 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)
Applications
♦ 10-Pin μSOP Package
TFT-LCD V
Calibration
COM
Ordering Information
Linear and Nonlinear Compensation
Instrumentation and Industrial Controls
Mechanical POT Replacement
Optical Transceivers
PART
TEMP RANGE
-40°C to +100°C
-40°C to +100°C
PIN-PACKAGE
10 µSOP
DS3501U+
DS3501U+T&R
10 µSOP
+Denotes a lead-free package.
T&R denotes tape-and-reel.
Pin Configuration and Typical Operating Circuit appear at
end of data sheet.
Functional Diagram
RH
127
126
125
SDA
VOLATILE
WIPER REGISTER
SCL
∑
DS3501
DECODER
LEVEL
SHIFTER
36-BYTE
LUT
NV
2
1
NV IVR
MEMORY
CONTROL
CIRCUITRY
AND ADDRESS
DECODE
0
A1
A0
RL
TEMP
SENSOR
AND ADC
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.