MAX5391 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Dual 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometers

19-5035; Rev 0; 10/09
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Dual 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
General Description
The MAX5391/MAX5393 dual 256-tap, volatile, low-
voltage linear taper digital potentiometers offer three
end-to-end resistance values of 10kI, 50kI, and 100kI.
Operating from a single +1.7V to +5.5V power sup-
ply, these devices provide a low 35ppm/NC end-to-end
temperature coefficient. The devices feature an SPIK
interface.
The small package size, low supply voltage, low sup-
ply current, and automotive temperature range of the
MAX5391/MAX5393 make the devices uniquely suitable
for the portable consumer market, battery backup indus-
trial applications, and the automotive market.
The MAX5391/MAX5393 include two digital potentio-
meters in a voltage-divider configuration. The MAX5391/
MAX5393 are specified over the -40NC to +125NC auto-
motive temperature range and are available in a 16-pin,
3mm x 3mm TQFN and a 14-pin TSSOP package,
respectively.
Applications
Low-Voltage Battery Applications
Portable Electronics
Mechanical Potentiometer Replacement
Offset and Gain Control
Adjustable Voltage References/Linear Regulators
Automotive Electronics
Features
S Dual 256-Tap Linear Taper Positions
S Single +1.7V to +5.5V Supply Operation
S Low 12µA Quiescent Supply Current
S 10kI, 50kI, and 100kI End-to-End Resistance
Values
S SPI-Compatible Interface
S Wiper Set to Midscale on Power-Up
S -40NC to +125NC Operating Temperature Range
Ordering Information
PART
PIN-PACKAGE
END-TO-END
RESISTANCE (kI)
MAX5391LATE+
16 TQFN-EP*
10
MAX5391MATE+
16 TQFN-EP*
50
MAX5391NATE+
16 TQFN-EP*
100
MAX5393LAUD+
14 TSSOP
10
MAX5393MAUD+
14 TSSOP
50
MAX5393NAUD+
14 TSSOP
100
Note: All devices are specified in the -40NC to +125NC tem-
perature range.
+Denotes a lead(Pb)-free/RoHS-compliant package
*EP = Exposed pad.
Functional Diagram
SPI is a trademark of Motorola, Inc.
V_DD BYP
HA
WA
LA
CHARGE
PUMP
CS
LATCH
256 DECODER
HB
SCLK
SPI
POR
MAX5391
MAX5393
DIN
WB
LATCH
256 DECODER
LB
GND
________________________________________________________________ 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.