MAX5487_10 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Dual, 256-Tap, Nonvolatile, SPI-Interface, Linear-Taper Digital Potentiometers

19-3478; Rev 4; 4/10
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Dual, 256-Tap, Nonvolatile, SPI-Interface,
Linear-Taper Digital Potentiometers
General Description
The MAX5487/MAX5488/MAX5489 dual, linear-taper,
digital potentiometers function as mechanical poten-
tiometers with a simple 3-wire SPI™-compatible digital
interface that programs the wipers to any one of 256
tap positions. These digital potentiometers feature a
nonvolatile memory (EEPROM) to return the wipers to
their previously stored positions upon power-up.
The MAX5487 has an end-to-end resistance of 10kΩ,
while the MAX5488 and MAX5489 have resistances of
50kΩ and 100kΩ, respectively. These devices have a
low 35ppm/°C end-to-end temperature coefficient, and
operate from a single +2.7V to +5.25V supply.
The MAX5487/MAX5488/MAX5489 are available in
16-pin 3mm x 3mm x 0.8mm TQFN or 14-pin TSSOP
packages. Each device is guaranteed over the extended
-40°C to +85°C temperature range.
Applications
LCD Screen Adjustment
Audio Volume Control
Mechanical Potentiometer Replacement
Low-Drift Programmable Filters
Low-Drift Programmable-Gain Amplifiers
Features
o Wiper Position Stored in Nonvolatile Memory
(EEPROM) and Recalled Upon Power-Up or
Recalled by an Interface Command
o 3mm x 3mm x 0.8mm, 16-Pin TQFN or 14-Pin
TSSOP Packages
o ±1 LSB INL, ±0.5 LSB DNL (Voltage-Divider Mode)
o 256 Tap Positions
o 35ppm/°C End-to-End Resistance Temperature
Coefficient
o 5ppm/°C Ratiometric Temperature Coefficient
o 10kΩ, 50kΩ, and 100kΩ End-to-End Resistance
Values
o SPI-Compatible Serial Interface
o Reliability
200,000 Wiper Store Cycles
50-Year Wiper Data Retention
o +2.7V to +5.25V Single-Supply Operation
SPI is a trademark of Motorola, Inc.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX5487ETE+
-40°C to +85°C
MAX5487EUD+
-40°C to +85°C
*EP = Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Ordering Information continued at end of data sheet.
16 TQFN-EP*
14 TSSOP
Functional Diagram
END-TO-END
RESISTANCE (kΩ)
10
10
TOP MARK
ABR
—
TOP VIEW
Pin Configurations
12 11 10 9
VDD
HA
8-BIT
8
256
GND
LATCH
DECODER
WA
SCLK
SPI
LA
DIN
INTERFACE
16-BIT
POR
NV RAM
CS
HB
8
256
8-BIT
DECODER
WB
LATCH
MAX5487
LB
MAX5488
MAX5489
LA 13
8 I.C.
WA 14
HA 15
I.C. 16 ₊
1
MAX5487
MAX5488
MAX5489
*EP
234
7 GND
6 N.C.
5 N.C.
TQFN
3mm x 3mm
*EXPOSED PAD.
Pin Configurations continued at end of data sheet.
________________________________________________________________ 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.