Rainbow Electronics DS3501 - Manual

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 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.
Applications
TFT-LCD V COM Calibration
Linear and Nonlinear Compensation
Instrumentation and Industrial Controls
Mechanical POT Replacement
Optical Transceivers
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
High-Voltage, NV, I 2 C POT with Temp Sensor
and Lookup Table
______________________________________________ Maxim Integrated Products 1
Rev 0; 1/07
+ Denotes a lead-free package.
T&R denotes tape-and-reel.
Ordering Information
PART TEMP RANGE PIN-PACKAGE
DS3501U+ -40°C to +100°C 10 µSOP
DS3501U+T&R -40°C to +100°C 10 µSOP
VOLATILE
WIPER REGISTER
NV IVR
36-BYTE
LUT
NV
MEMORY
CONTROL
CIRCUITRY
AND ADDRESS
DECODE
TEMP
SENSOR
AND ADC
A1
A0
SDA
SCL
∑
DECODER
LEVEL
SHIFTER
127
126
125
2
1
0
RH
RL
RW
DS3501
Functional Diagram
Pin Configuration and Typical Operating Circuit appear at
end of data sheet.
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.