MAX5417 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers

19-3185; Rev 2; 8/04
256-Tap, Nonvolatile, I²C-Interface,
Digital Potentiometers
General Description
The MAX5417/MAX5418/MAX5419 nonvolatile, linear-
taper, digital potentiometers perform the function of a
mechanical potentiometer, but replace the mechanics
with a simple 2-wire digital interface, allowing communi-
cation with multiple devices. Each device performs the
same function as a discrete potentiometer or variable
resistor and has 256 tap points.
The devices feature an internal, nonvolatile EEPROM
used to store the wiper position for initialization during
power-up. The fast-mode I²C™-compatible serial inter-
face allows communication at data rates up to 400kbps,
minimizing board space and reducing interconnection
complexity in many applications. Each device is available
with one of four factory-preset addresses (see the
Selector Guide) and features an address input for a total
of eight unique address combinations.
The MAX5417/MAX5418/MAX5419 provide three nomi-
nal resistance values: 50kΩ (MAX5417), 100kΩ
(MAX5418), or 200kΩ (MAX5419). The nominal resistor
temperature coefficient is 35ppm/°C end-to-end, and
only 5ppm/°C ratiometric. This makes the devices ideal
for applications requiring a low-temperature-coefficient
variable resistor, such as low-drift, programmable gain-
amplifier circuit configurations.
The MAX5417/MAX5418/MAX5419 are available in a
3mm x 3mm 8-pin TDFN package, and are specified
over the extended -40°C to +85°C temperature range.
Applications
Mechanical Potentiometer Replacement
Low-Drift Programmable-Gain Amplifiers
Volume Control
Liquid-Crystal Display (LCD) Contrast Control
Features
♦ Power-On Recall of Wiper Position from
Nonvolatile Memory
♦ Tiny 3mm x 3mm 8-Pin TDFN Package
♦ 35ppm/°C End-to-End Resistance Temperature
Coefficient
♦ 5ppm/°C Ratiometric Temperature Coefficient
♦ 50kΩ/100kΩ/200kΩ Resistor Values
♦ Fast I²C-Compatible Serial Interface
♦ 500nA (typ) Static Supply Current
♦ Single-Supply Operation: +2.7V to +5.25V
♦ 256 Tap Positions
♦ ±0.5 LSB DNL in Voltage-Divider Mode
♦ ±0.5 LSB INL in Voltage-Divider Mode
Functional Diagram
H
V_DD
GND
8-BIT 8
SHIFT
REGISTER
8-BIT 8
LATCH
256-
POSITION
256
DECODER
W
L
SDA
I²C
POR
SCL
INTERFACE
8-BIT
MAX5417
MAX5418
A₀
NV
MEMORY
MAX5419
I²C is a trademark of Phillips Corp.
Purchase of I²C components from Maxim Integrated Products,
Inc. or one of its sublicensed Associated Companies, conveys
a license under the Philips I²C Patent Rights to use these com-
ponents in an I²C system, provided that the system conforms
to the I²C Standard Specification as defined by Philips.
Ordering Information/Selector Guide
PART
TEMP RANGE
MAX5417LETA
-40°C to +85°C
MAX5417META*
-40°C to +85°C
MAX5417NETA*
-40°C to +85°C
MAX5417PETA*
-40°C to +85°C
MAX5418LETA
-40°C to +85°C
MAX5418META*
-40°C to +85°C
MAX5418NETA*
-40°C to +85°C
MAX5418PETA*
-40°C to +85°C
MAX5419LETA
-40°C to +85°C
MAX5419META*
-40°C to +85°C
MAX5419NETA*
-40°C to +85°C
MAX5419PETA*
-40°C to +85°C
*Future product—contact factory for availability.
**Exposed pad.
I²C ADDRESS
010100A₀
010101A₀
010110A₀
010111A₀
010100A₀
010101A₀
010110A₀
010111A₀
010100A₀
010101A₀
010110A₀
010111A₀
R (kΩ)
50
50
50
50
100
100
100
100
200
200
200
200
PIN-PACKAGE
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
TOP MARK
AIB
ALS
ALT
ALU
AIC
ALV
ALW
ALX
AID
ALY
ALZ
AMA
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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