Datenblatt-pdf.com


DS3502 Schematic ( PDF Datasheet ) - Maxim Integrated

Teilenummer DS3502
Beschreibung I2C POT
Hersteller Maxim Integrated
Logo Maxim Integrated Logo 




Gesamt 11 Seiten
DS3502 Datasheet, Funktion
Rev 1; 3/09
High-Voltage, NV, I2C POT
General Description
The DS3502 is a 7-bit, nonvolatile (NV) digital poten-
tiometer (POT) featuring an output voltage range of up to
15.5V. Programming is accomplished by an I2C-compat-
ible 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.
Applications
TFT-LCD VCOM Calibration
Instrumentation and Industrial Controls
Mechanical POT Replacement
Pin Configuration and Typical Operating Circuit appear at
end of data sheet.
Features
128 Wiper Tap Points
Full-Scale Resistance: 10kΩ
I2C-Compatible Serial Interface
Address Pins Allow Up to Four DS3502s to Share
the Same I2C Bus
Digital Operating Voltage: 2.5V to 5.5V
Analog Operating Voltage: 4.5V to 15.5V
Operating Temperature: -40°C to +100°C
10-Pin µSOP Package
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS3502U+
-40°C to +100°C 10 μSOP
DS3502U+T&R
-40°C to +100°C 10 μSOP
+Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
Functional Diagram
SDA 7-BIT
SCL WIPER REGISTER
127
126
RH
DS3502
7-BIT
NONVOLATILE MEMORY
125
DECODER
LEVEL SHIFTER
2
1
CONTROL CIRCUITRY
AND
A1 ADDRESS DECODE
A0
0
RL
RW
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Free Datasheet http://www.datasheet4u.com/






DS3502 Datasheet, Funktion
High-Voltage, NV, I2C POT
Simplified Functional Diagram
VCC
GND
SCL
I2C
INTERFACE
SDA
A0
A1
DS3502
CONTROL
LOGIC/
REGISTER
(02h)
MODE BIT
WIPER
REGISTER/
INITIAL VALUE
REGISTER
(WR/IVR)
00h
POS 7Fh
V+
RH
RW
POS 00h
RL
Detailed Description
The DS3502 contains a single potentiometer whose
wiper position is controlled by the value in the Wiper
Register (WR). The initial power-up value of the wiper
position is set by programming the Initial Value Register
(IVR). On power-up, the data stored in the IVR register
is loaded into the WR register, which sets the position
of the potentiometer’s wiper.
Control Register
The Control Register (CR) located in register 02h con-
tains the WR/IVR Address Mode bit (MODE bit). The
MODE bit determines how I2C data is written to the WR
and IVR data register as follows:
MODE = 0: I2C writes to memory address 00h write to
(CR = 00h) both WR and IVR.
I2C reads from address 00h read from WR.
MODE = 1: I2C writes to memory address 00h write to
(CR = 80h) WR.
I2C reads from address 00h read from WR.
Table 1. Memory Map
REGISTER
WR/IVR
CR
NAME
Wiper Register/Initial Value Register
Control Register
Regardless of the setting of the MODE bit, all I2C reads
of address 00h return the contents of the WR register.
Setting MODE = 1 allows for quick writing of SRAM
without the added delay of writing to the associated
EEPROM register. The data that is stored in EEPROM
and SRAM remains unchanged if the MODE bit is tog-
gled. The volatile CR register powers up as 00h, set-
ting the device into MODE = 0.
Digital Potentiometer Output
The potentiometer consists of 127 resistors in series
connected between the RH and RL pins. Between each
resistance and at the two endpoints, RH and RL, solid-
state switches enable RW to be connected within the
resistive network. The wiper position and the output on
RW are decoded based on the value in WR. If RH, RL,
and RW are externally connected in a voltage-divider
configuration, then the voltage on RW can be easily
calculated using the following equation:
VRW
=
VRL
+
WR
127
(VRH
VRL )
where WR is the wiper position in decimal (0–127).
ADDRESS
(HEX)
00
02
FACTORY/POWER-UP DEFAULT
(HEX)
40
00 (Mode 0)
6 _______________________________________________________________________________________
Free Datasheet http://www.datasheet4u.com/

6 Page







SeitenGesamt 11 Seiten
PDF Download[ DS3502 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
DS3501I2C POTMaxim Integrated
Maxim Integrated
DS3502I2C POTMaxim Integrated
Maxim Integrated
DS3503Stepper PotentiometerMaxim Integrated
Maxim Integrated
DS35088-Channel Gamma BufferMaxim Integrated
Maxim Integrated

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche