DS3501 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – High-Voltage, NV, I2C POT with Temp Sensor and Lookup Table

Rev 0; 1/07
High-Voltage, NV, I²C POT with Temp Sensor
and Lookup Table
General Description
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 I²C-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.
Applications
TFT-LCD VCOM 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.
Features
♦ 128 Wiper Tap Points
♦ Full-Scale Resistance: 10kΩ
♦ On-Chip Temperature Sensor and ADC
♦ 36-Byte Lookup Table (LUT)
♦ I²C-Compatible Serial Interface
♦ Address Pins Allow Up to Four DS3501s to Share
the Same I²C 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
Ordering Information
PART
TEMP RANGE
DS3501U+
-40°C to +100°C
DS3501U+T&R
-40°C to +100°C
+Denotes a lead-free package.
T&R denotes tape-and-reel.
PIN-PACKAGE
10 µSOP
10 µSOP
Functional Diagram
RH
127
SDA
VOLATILE
SCL
WIPER REGISTER
126
∑
DS3501
NV IVR
36-BYTE
LUT
NV
MEMORY
125
DECODER
LEVEL
SHIFTER
2
1
CONTROL
CIRCUITRY
A1
AND ADDRESS
A0
DECODE
TEMP
SENSOR
AND ADC
0
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.