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Maxim Integrated |
MAX5395
Single, 256-Tap Volatile, I2C, Low-Voltage Linear
Taper Digital Potentiometer
General Description
The MAX5395 single, 256-tap volatile, low-voltage
linear taper digital potentiometer offers three end-to-
end resistance values of 10kΩ, 50kΩ, and 100kΩ.
Potentiometer terminals are independent of supply for
voltages up to 5.25V with single-supply operation from
1.7V to 5.5V (charge pump enabled). User-controlled
shutdown modes allow the H, W, or L terminal to be
opened with the wiper position set to zero-code, mid-
code, full-code, or the value contained in the wiper
register. Ultra-low-quiescent supply current (< 1µA) can
be achieved for supply voltages between 2.6V and 5.5V
by disabling the internal charge pump and not allowing
potentiometer terminals to exceed the supply voltage by
more than 0.3V. The MAX5395 provides a low 50ppm/°C
end-to-end temperature coefficient and features an I2C
serial interface.
The small package size, low operating supply voltage,
low supply current, and automotive temperature range
of the MAX5395 make the device uniquely suited for the
portable consumer market, battery-backup industrial
applications, and automotive market.
The MAX5395 is available in a lead-free, 8-pin TDFN
(2mm x 2mm) package. The device operates over the
-40°C to +125°C automotive temperature range.
Ordering Information appears at end of data sheet.
Features
S Single Linear Taper 256-Tap Positions
S 10kI, 50kI, and 100kI End-to-End Resistance
S 1.7V to 5.5V Extended Single Supply
S 0 to 5.25V H, W, L Operating Voltage Independent
of VDD
S 1µA (typ) Supply Current in Low-Power Mode
S ±1.0 LSB INL, ±0.5 LSB DNL (max) Wiper Accuracy
S Power-On Sets Wiper to Midscale
S 50ppm/NC End-to-End Temperature Coefficient
S 5ppm/NC Ratiometric Temperature Coefficient
S -40NC to +125NC Operating Temperature Range
S 2mm x 2mm, 8-Pin TDFN Package
S I2C-Compatible Serial Interface
Applications
Portable Electronics
System Calibration
Battery-Powered Systems
Automotive Electronics
Mechanical Potentiometer Replacement
Typical Operating Circuit
ADDR0
SDA
SCL
VDD 1.7V TO 5.5V
(CHARGE PUMP ENABLED) H
MAX5395
I2C
INTERFACE
W
+5V
VS
MAX4250
VO
GND L
R1
VO/ VS = 1 + RMAX5395/R1
For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/MAX5395.related
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-6393; Rev 1; 9/12
http://www.Datasheet4U.com
MAX5395
Single, 256-Tap Volatile, I2C, Low-Voltage Linear
Taper Digital Potentiometer
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
VDD ...........................................................................-0.3V to +6V
H, W, L (charge pump enabled) ...........................-0.3V to +5.5V
H, W, L (charge pump disabled).................. -0.3V to the lower of
(VDD + 0.3V) or +6V
ADDR0......................... -0.3V to the lower of (VDD + 0.3V) or +6V
All Other Pins ...........................................................-0.3V to +6V
Continuous Current into H, W, and L
MAX5395L...........................................................................5mA
MAX5395M..........................................................................2mA
MAX5395N..........................................................................1mA
Maximum Current into Any Input.........................................50mA
Continuous Power Dissipation (TA = +70NC)
TDFN (derate 11.9mW/NC above +70NC)...................953.5mW
Operating Temperature Range ......................... -40NC to +125NC
Storage Temperature Range............................. -65NC to + 150NC
Junction Temperature.......................................................+150NC
Lead Temperature (soldering, 10s).................................+ 300NC
Soldering Temperature (reflow) .......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TDFN
Junction-to-Ambient Thermal Resistance (qJA)........83.9°C/W
Junction-to-Case Thermal Resistance (qJC).............37.0°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
ELECTRICAL CHARACTERISTICS
(VDD = 1.7V to 5.5V, VH = VDD, VL = GND, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VDD = 1.8V,
TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
RESOLUTION
256-Tap Family
N
256 Tap
DC PERFORMANCE (Voltage-Divider Mode)
Integral Nonlinearity (Note 3)
INL
-1.0 +1.0 LSB
Differential Nonlinearity
DNL (Note 3)
-0.5 +0.5 LSB
Ratiometric Resistor Tempco
(DVW/VW)/DT, VH = VDD, VL = GND, No
Load
5 ppm/°C
Full-Scale Error (Code FFh)
Charge pump enabled, 1.7V < VDD < 5.5V
MAX5395M
Charge pump disabled, 2.6V MAX5395N
< VDD < 5.5V
MAX5395L
-0.5
-0.5
-1.0
LSB
Zero-Scale Error (Code 00h)
Charge pump enabled, 1.7V < VDD < 5.5V
Charge pump disabled, 2.6V
< VDD < 5.5V
MAX5395M
MAX5395N
MAX5395L
DC PERFORMANCE (Variable Resistor Mode)
+0.5
+0.5
+1.0
LSB
Integral Nonlinearity (Note 4)
R-INL
Charge pump enabled, 1.7V < VDD < 5.5V
MAX5395M
Charge pump disabled, 2.6V MAX5395N
< VDD < 5.5V
MAX5395L
-1.0
-1.0
-1.5
+1.0
+1.0
+1.5
LSB
Differential Nonlinearity
R-DNL (Note 4)
-0.5 +0.5 LSB
Wiper Resistance (Note 5)
RWL
Charge pump enabled, 1.7V < VDD < 5.5V
Charge pump disabled, 2.6V < VDD < 5.5V
25 50
200
W
Maxim Integrated
2
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