Rainbow Electronics MAX5419 - Manual

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 I
2 C™-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: 50k
Ω (MAX5417), 100kΩ
(MAX5418), or 200k Ω (MAX5419). The nominal resistor
temperature coefficient is 50ppm/°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
♦ 50ppm/°C End-to-End Resistance Temperature
Coefficient
♦ 5ppm/°C Ratiometric Temperature Coefficient
♦ 50kΩ/100kΩ/200kΩ Resistor Values
♦ Fast I
2 C-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
MAX5417/MAX5418/MAX5419
256-Tap, Nonvolatile, I 2 C-Interface,
Digital Potentiometers
________________________________________________________________ Maxim Integrated Products 1
V DD
GND
SDA
SCL
8-BIT
SHIFT
REGISTER
8-BIT
LATCH
8-BIT
NV
MEMORY
I 2 C
INTERFACE
A 0
8 8 256
W
L
256-
POSITION
DECODER
H
POR
MAX5417
MAX5418
MAX5419
Ordering Information/Selector Guide
Functional Diagram
19-3185; Rev 1; 3/04
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.
Pin Configuration appears at end of data sheet.
I 2 C is a trademark of Philips Corp.
Purchase of I 2 C components from Maxim Integrated Products,
Inc. or one of its sublicensed Associated Companies, conveys
a license under the Philips I
2 C Patent Rights to use these com-
ponents in an I 2 C system, provided that the system conforms
to the I 2 C Standard Specification as defined by Philips.
*Future product—contact factory for availability.
**Exposed pad.
PART TEMP RANGE PIN-PACKAGE I 2 C ADDRESS R (k Ω) TOP MARK
MAX5417LETA -40°C to +85°C 8 TDFN-EP** 010100A 0 50 AIB
MAX5417META* -40°C to +85°C 8 TDFN-EP** 010101A 0 50 ALS
MAX5417NETA* -40°C to +85°C 8 TDFN-EP** 010110A 0 50 ALT
MAX5417PETA* -40°C to +85°C 8 TDFN-EP** 010111A 0 50 ALU
MAX5418LETA -40°C to +85°C 8 TDFN-EP** 010100A 0 100 AIC
MAX5418META* -40°C to +85°C 8 TDFN-EP** 010101A 0 100 ALV
MAX5418NETA* -40°C to +85°C 8 TDFN-EP** 010110A 0 100 ALW
MAX5418PETA* -40°C to +85°C 8 TDFN-EP** 010111A 0 100 ALX
MAX5419LETA* -40°C to +85°C 8 TDFN-EP** 010100A 0 200 AID
MAX5419META* -40°C to +85°C 8 TDFN-EP** 010101A 0 200 ALY
MAX5419NETA* -40°C to +85°C 8 TDFN-EP** 010110A 0 200 ALZ
MAX5419PETA* -40°C to +85°C 8 TDFN-EP** 010111A 0 200 AMA