19-4599; Rev 2; 1/10
TION KIT
EVALUA BLE
AVAILA
Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
Features
S
Dual, 256-Tap, Linear Taper Positions
S
Single +2.6V to +5.5V Supply Operation
S
Low (< 1µA) Quiescent Supply Current
S
10kI, 50kI, 100kI End-to-End Resistance Values
S
SPI-Compatible Interface
S
Power-On Sets Wiper to Midscale
S
-40NC to +125NC Operating Temperature Range
General Description
The MAX5386/MAX5388 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 +2.6V to +5.5V power supply 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
MAX5386/MAX5388 make the devices uniquely suitable
for the portable consumer market, battery backup indus-
trial applications, and the automotive market.
The MAX5386 includes two digital potentiometers in a
voltage-divider configuration. The MAX5388 includes
one digital potentiometer in a voltage-divider configura-
tion and one digital potentiometer in a variable-resistor
configuration. The MAX5386/MAX5388 are specified
over an extended -40NC to +125NC temperature range
and are available in 16-pin, 3mm x 3mm TQFN or 10-pin,
3mm x 5mm
FMAX
M
packages, respectively.
MAX5386/MAX5388
Ordering Information
PART
MAX5386LATE+
MAX5386MATE+
MAX5386NATE+
MAX5388LAUB+
MAX5388MAUB+
MAX5388NAUB+
PIN-
PACKAGE
16 TQFN-EP*
16 TQFN-EP*
16 TQFN-EP*
10
FMAX
10
FMAX
10
FMAX
END-TO-END
RESISTANCE (kI)
10
50
100
10
50
100
Applications
Low-Voltage Battery Applications
Portable Electronics
Mechanical Potentiometer Replacement
Offset and Gain Control
Adjustable Voltage References/Linear Regulators
Automotive Electronics
Functional Diagrams appear at end of data sheet.
Note:
All devices are specified over the -40°C to +125°C
operating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
SPI is a trademark of Motorola, Inc.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Pin Configurations
SCLK
10
V
DD
N.C.
DIN
9
8
7
CS
N.C.
N.C.
GND
TOP VIEW
12
N.C. 13
HA 14
WA 15
LA 16
11
TOP VIEW
GND 1
LB
HB
WB
2
3
4
5
+
10 LA
9
WA
V
DD
SCLK
DIN
MAX5386
+
1
HB
2
WB
3
LB
*EP
4
I.C.
6
5
MAX5388
8
7
6
CS
µMAX
TQFN
*EP = EXPOSED PAD.
_______________________________________________________________
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.
Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
MAX5386/MAX5388
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND.............................................................-0.3V to +6V
H_, W_, L_ to GND ....-0.3V to the lower of (V
DD
+ 0.3V) and +6V
All Other Pins to GND .............................................-0.3V to +6V
Continuous Current in to H_, W_, and L_
MAX5386L/MAX5388L................................................... ±5mA
MAX5386M/MAX5388M.................................................
Q2mA
MAX5386N/MAX5388N .................................................
Q1mA
Continuous Power Dissipation (T
A
= +70NC)
16 TQFN (derate 14.7mW/NC above +70NC) .........1176.5mW
10
FMAX
(derate 8.8mW/NC above +70NC) .............707.3mW
Operating Temperature Range ........................ -40NC to +125NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation 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.
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.6V to +5.5V, V
H_
= V
DD
, V
L_
= GND, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
DD
= +5V, T
A
= +25˚C. ) (Note 1)
PARAMETER
Resolution
Integral Nonlinearity
Differential Nonlinearity
Dual Code Matching
Ratiometric Resistor Tempco
Full-Scale Error
SYMBOL
N
INL
DNL
(Note 2)
(Note 2)
Register A = register B
(DV
W
/V
W
)/DT no load
MAX5386L/MAX5388L
Code = FFH
MAX5386M/MAX5388M
MAX5386N/MAX5388N
MAX5386L/MAX5388L
Zero-Scale Error
Code = 00H
MAX5386M/MAX5388M
MAX5386N/MAX5388N
DC PERFORMANCE (VARIABLE-RESISTOR MODE) (Note 3)
MAX5386L/MAX5388L
V
DD
> +2.6V
Integral Nonlinearity
R-INL
V
DD
> +4.75V
Differential Nonlinearity
R-DNL
V
DD
R
2.6V
V
DD
R
2.6V
V
DD
> 4.75V
Measured to GND
Measured to GND
No load
Wiper not connected
(Note 5)
BW
Code = 80H,
10pF load,
V
DD
= +2.6V
MAX5386L/MAX5388L
MAX5386M/MAX5388M
MAX5386N/MAX5388N
-25
-90
600
150
75
kHz
MAX5386M/MAX5388M
MAX5386N/MAX5388N
MAX5386L/MAX5388L
MAX5386M/MAX5388M
MAX5386N/MAX5388N
-0.5
250
150
10
50
35
+25
DC PERFORMANCE (RESISTOR CHARACTERISTICS)
Wiper Resistance (Note 4)
Terminal Capacitance
Wiper Capacitance
End-to-End Resistor Tempco
End-to-End Resistor Tolerance
AC PERFORMANCE
Crosstalk
-3dB Bandwidth
dB
R
W
C
H
_, C
L
_
C
W
_
TC
R
DR
HL
600
200
I
pF
pF
ppm/NC
%
Q1.0
Q0.5
Q0.25
Q0.4
Q0.3
Q0.25
Q2.5
Q1.0
Q0.8
Q1.5
Q0.75
Q0.5
+0.5
LSB
LSB
-3.0
-1.0
-0.5
CONDITIONS
MIN
256
-0.5
-0.5
-0.5
Q5
-2.5
-0.5
-0.25
2.5
+0.5
+0.25
3.0
+1.0
+0.5
LSB
LSB
+0.5
+0.5
+0.5
TYP
MAX
UNITS
Tap
LSB
LSB
LSB
ppm/NC
DC PERFORMANCE (VOLTAGE-DIVIDER MODE)
2
______________________________________________________________________________________
Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.6V to +5.5V, V
H_
= V
DD
, V
L_
= GND, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
DD
= +5V, T
A
= +25˚C. ) (Note 1)
PARAMETER
Total Harmonic Distortion
Plus Noise
Wiper Settling Time (Note 6)
POWER SUPPLIES
Supply Voltage Range
Standby Current
DIGITAL INPUTS
Minimum Input High Voltage
Maximum Input Low Voltage
Input Leakage Current
Input Capacitance
TIMING CHARACTERISTICS (Note 7)
Maximum SCLK Frequency
SCLK Clock Period
SCLK Pulse-Width High
SCLK Pulse-Width Low
CS
Fall to SCLK Rise Setup Time
SCLK Rise to
CS
Rise Hold Time
DIN Setup Time
DIN Hold Time
SCLK Rise to
CS
Fall Delay
SCLK Rise to SCLK Rise Hold
Time
CS
Pulse-Width High
f
MAX
t
CP
t
CH
t
CL
t
CSS
t
CSH
t
DS
t
DH
t
CS0
t
CS1
t
CSW
100
40
40
40
0
40
0
10
40
100
10
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
V
IH
V
IL
-1
5
70
30
+1
%V
DD
%V
DD
FA
pF
V
DD
Digital inputs = V
DD
or GND
2.6
1
5.5
V
FA
SYMBOL
THD+N
CONDITIONS
Measured at W, V
H_
= 1V
RMS
at 1kHz
MAX5386L/MAX5388L
t
S
MAX5386M/MAX5388M
MAX5386N/MAX5388N
MIN
TYP
0.015
300
1000
2000
ns
MAX
UNITS
%
MAX5386/MAX5388
Note 1:
All devices are 100% production tested at T
A
= +25°C. Specifications over temperature limits are guaranteed by design
and characterization.
Note 2:
DNL and INL are measured with the potentiometer configured as a voltage-divider (Figure 1) with H = V
DD
and L = GND.
The wiper terminal is unloaded and measured with an ideal voltmeter.
Note 3:
R-DNL and R-INL are measured with the potentiometer configured as a variable resistor (Figure 1). DNL and INL are mea-
sured with the potentiometer configured as a variable resistor. H_ is unconnected and L_ = GND. For V
DD
= +5V, the wiper
terminal is driven with a source current of 400µA for the 10kI configuration, 80µA for the 50kI configuration, and 40µA for
the 100kI configuration. For V
DD
= +2.6V, the wiper terminal is driven with a source current of 200µA for the 10kI configu-
ration, 40µA for the 50kI configuration, and 20µA for the 100kI configuration.
Note 4:
The wiper resistance is the worst value measured by injecting the currents given in Note 3 in to W with L = GND. R
W
= (V
W
- V
H
)/I
W
.
Note 5:
Drive HA with a 1kHz GND to V
DD
amplitude tone. LA = LB = GND. No load. WB is at midscale with a 10pF load. Measure
WB.
Note 6:
The wiper-settling time is the worst case 0 to 50% rise time, measured between tap 0 and tap 127. H = V
DD
, L = GND, and
the wiper terminal is loaded with 10pF capacitance to ground.
Note 7:
Digital timing is guaranteed by design and characterization, not production tested.
_______________________________________________________________________________________
3
Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
MAX5386/MAX5388
Typical Operating Characteristics
(V
DD
= 5V, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. TEMPERATURE
MAX5386 toc01
SUPPLY CURRENT
vs. DIGITAL INPUT VOLTAGE
MAX5386 toc02
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5386 toc03
1.0
0.8
SUPPLY CURRENT (µA)
0.6
0.4
0.2
0
10
1
SUPPLY CURRENT (mA)
0.1
0.01
V
DD
= 2.6V
V
DD
= 5V
1.00
V
DD
= 5V
0.75
I
DD
(µA)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
DIGITAL INPUT VOLTAGE (V)
0.50
V
DD
= 2.6V
0.001
0.0001
-40 -25 -10 0 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
0.25
0
2.5
3.0
3.5
4.0
V
DD
(V)
4.5
5.0
5.5
RESISTANCE (W TO L)
vs. TAP POSITION (10kΩ)
MAX5386 toc04
RESISTANCE (W TO L)
vs. TAP POSITION (50kΩ)
MAX5386 toc05
RESISTANCE (W-TO-L)
vs. TAP POSITION (100kI)
100k
RESISTANCE (W-TO-L) (kI)
90k
80k
70k
60k
50k
40k
30k
20k
10k
0
MAX5386 toc06
11,000
10,000
W-TO-L RESISTANCE (kΩ)
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
0
51
102
153
TAP POSITION
204
55,000
50,000
W-TO-L RESISTANCE (kΩ)
45,000
40,000
35,000
30,000
25,000
20,000
15,000
10,000
5000
0
110k
255
0
51
102
153
TAP POSITION
204
255
0
51
102
153
204
255
TAP POSITION
WIPER RESISTANCE
vs. WIPER VOLTAGE (10kΩ)
MAX5386 toc07
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
10kI
MAX5386 toc08
VARIABLE-RESISTOR DNL
vs. TAP POSITION (10kI)
0.08
0.06
0.04
0.02
0
-0.02
-0.04
-0.06
-0.08
-0.10
I
WIPER
= 400µA
190
WIPER RESISTANCE (Ω)
170
150
130
110
90
70
V
DD
= 5V
V
DD
= 2.6V
END-TO-END RESISTANCE % CHANGE
0
-0.1
50kI
-0.2
-0.3
-0.4
-0.5
100kI
DNL (LSB)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
WIPER VOLTAGE
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (NC)
0
51
102
153
204
255
TAP POSITION
4
______________________________________________________________________________________
MAX5386 toc09
210
0.1
0.10
Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
Typical Operating Characteristics (continued)
(V
DD
= 5V, T
A
= +25°C, unless otherwise noted.)
VARIABLE-RESISTOR DNL
vs. TAP POSITION (50kI)
MAX5386 toc10
MAX5386/MAX5388
VARIABLE-RESISTOR DNL
vs. TAP POSITION (100kI)
MAX5386 toc11
VARIABLE-RESISTOR INL
vs. TAP POSITION (10kI)
0.8
0.6
0.4
INL (LSB)
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0.08
0.06
0.04
DNL (LSB)
0
-0.02
-0.04
-0.06
-0.08
-0.10
0
0.02
I
WIPER
= 80µA
0.08
0.06
0.04
DNL (LSB)
0.02
0
-0.02
-0.04
-0.06
-0.08
-0.10
I
WIPER
= 400µA
I
WIPER
= 400µA
51
102
153
204
255
0
51
102
153
204
255
0
51
102
153
204
255
TAP POSITION
TAP POSITION
TAP POSITION
VARIABLE-RESISTOR INL
vs. TAP POSITION (50kI)
MAX5386 toc13
VARIABLE-RESISTOR INL
vs. TAP POSITION (100kI)
MAX5386 toc14
VOLTAGE-DIVIDER DNL
vs. TAP POSITION (10kI)
0.08
0.06
0.04
DNL (LSB)
0.02
0
-0.02
-0.04
-0.06
-0.08
-0.10
MAX5386 toc15
0.5
0.4
0.3
0.2
INL (LSB)
0
-0.1
-0.2
-0.3
-0.4
-0.5
0
0.1
I
WIPER
= 80µA
0.5
0.4
0.3
0.2
INL (LSB)
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
I
WIPER
= 400µA
0.10
51
102
153
204
255
0
51
102
153
204
255
0
51
102
153
204
255
TAP POSITION
TAP POSITION
TAP POSITION
VOLTAGE-DIVIDER DNL
vs. TAP POSITION (50kI)
MAX5386 toc16
VOLTAGE-DIVIDER DNL
vs. TAP POSITION (100kI)
MAX5386 toc17
VOLTAGE-DIVIDER INL
vs. TAP POSITION (10kI)
0.4
0.3
0.2
INL (LSB)
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
MAX5386 toc18
0.10
0.08
0.06
0.04
DNL (LSB)
0
-0.02
-0.04
-0.06
-0.08
-0.10
0
51
102
153
204
0.02
0.10
0.08
0.06
0.04
DNL (LSB)
0.02
0
-0.02
-0.04
-0.06
-0.08
-0.10
0.5
255
0
51
102
153
204
255
0
51
102
153
204
255
TAP POSITION
TAP POSITION
TAP POSITION
_______________________________________________________________________________________
MAX5386 toc12
0.10
0.10
1.0
5
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