19-3185; Rev 3; 3/09
256-Tap, Nonvolatile, I
2
C-Interface,
Digital Potentiometers
General Description
The MAX5417/MAX5418/MAX5419 nonvolatile, linear-
taper, digital potentiometers perform the function of a
mechanical potentiometer by replacing 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 interface
allows communication at data rates up to 400kbps, mini-
mizing board space and reducing interconnection com-
plexity 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: 50kΩ (MAX5417), 100kΩ
(MAX5418), or 200kΩ (MAX5419). The nominal resistor
temperature coefficient is 35ppm/°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.
Features
♦
Power-On Recall of Wiper Position from
Nonvolatile Memory
♦
Tiny 3mm x 3mm 8-Pin TDFN Package
♦
35ppm/°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
Functional Diagram
H
V
DD
GND
8-BIT
SHIFT
REGISTER
8
8-BIT 8
LATCH
256-
256
POSITION
DECODER
W
L
SDA
SCL
A
0
I
2
C
INTERFACE
POR
8-BIT
NV
MEMORY
Applications
Mechanical Potentiometer Replacement
Low-Drift Programmable-Gain Amplifiers
Volume Control
Liquid-Crystal Display (LCD) Contrast Control
MAX5417
MAX5418
MAX5419
Ordering Information/Selector Guide
PART
MAX5417LETA
MAX5417META*
MAX5417NETA*
MAX5417PETA*
MAX5418LETA
MAX5418META*
MAX5418NETA*
MAX5418PETA*
MAX5419LETA
MAX5419META*
MAX5419NETA*
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
I
2
C ADDRESS
010100A
0
010101A
0
010110A
0
010111A
0
010100A
0
010101A
0
010110A
0
010111A
0
010100A
0
010101A
0
010110A
0
010111A
0
R (kΩ)
50
50
50
50
100
100
100
100
200
200
200
200
PIN-PACKAGE
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
TOP MARK
AIB
ALS
ALT
ALU
AIC
ALV
ALW
ALX
AID
ALY
ALZ
AMA
MAX5419PETA*
-40°C to +85°C
*Future
product—contact factory for availability.
**Exposed
pad.
Pin Configuration appears at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
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.
256-Tap, Nonvolatile, I
2
C-Interface,
Digital Potentiometers
MAX5417/MAX5418/MAX5419
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND ...........................................................-0.3V to +6.0V
All Other Pins to GND.................................-0.3V to (V
DD
+ 0.3V)
Maximum Continuous Current into H, L, and W
MAX5417......................................................................±1.3mA
MAX5418......................................................................±0.6mA
MAX5419......................................................................±0.3mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin TDFN (derate 24.4mW/°C above +70°C) .........1951mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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
= +2.7V to +5.25V, H = V
DD
, L = GND, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= +5V, T
A
= +25°C.)
PARAMETER
Resolution
Integral Nonlinearity
Differential Nonlinearity
End-to-End Temperature
Coefficient
Ratiometric Temperature
Coefficient
Full-Scale Error
MAX5417_, 50Ω
MAX5418_, 100kΩ
MAX5419_, 200kΩ
MAX5417_, 50kΩ
Zero-Scale Error
MAX5418_, 100kΩ
MAX5419_, 200kΩ
V
DD
= 3V
V
DD
= 5V
V
DD
= 3V, MAX5417_, 50kΩ,
guaranteed monotonic
Differential Nonlinearity
(Note 2)
DNL
V
DD
= 3V, MAX5418_, 100kΩ
MAX5419_, 200kΩ
V
DD
= 5V
DC PERFORMANCE (RESISTOR CHARACTERISTICS)
Wiper Resistance
Wiper Capacitance
End-to-End Resistance
R
W
C
W
MAX5417_
R
HL
MAX5418_
MAX5419_
37.5
75
150
V
DD
= 3V to 5.25V (Note 3)
325
10
50
100
200
62.5
125
250
kΩ
675
Ω
pF
-1
INL
DNL
TC
R
(Note 1)
(Note 1)
35
5
-0.6
-0.3
-0.15
0.6
0.3
0.15
±3
±1.5
+2
±1
±1
±1
LSB
LSB
SYMBOL
CONDITIONS
MIN
256
±0.5
±0.5
TYP
MAX
UNITS
Taps
LSB
LSB
ppm/°C
ppm/°C
DC PERFORMANCE (VOLTAGE-DIVIDER MODE)
LSB
DC PERFORMANCE (VARIABLE-RESISTOR MODE)
Integral Nonlinearity
(Note 2)
INL
LSB
2
_______________________________________________________________________________________
256-Tap, Nonvolatile, I
2
C-Interface,
Digital Potentiometers
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.25V, H = V
DD
, L = GND, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= +5V, T
A
= +25°C.)
PARAMETER
DIGITAL INPUTS
Input High Voltage (Note 4)
Input Low Voltage
Low-Level Output Voltage
Input Leakage Current
Input Capacitance
DYNAMIC CHARACTERISTICS
MAX5417_
Wiper -3dB Bandwidth (Note 5)
NONVOLATILE MEMORY
Data Retention
Endurance
POWER SUPPLY
Power-Supply Voltage
Standby Current
Programming Current
V
DD
I
DD
Digital inputs = V
DD
or GND,
T
A
= +25°C
During nonvolatile write;
digital inputs = V
DD
or GND (Note 6)
2.70
0.5
200
5.25
1
400
V
µA
µA
T
A
= +85°C
T
A
= +25°C
T
A
= +85°C
50
200,000
50,000
Years
Stores
MAX5418_
MAX5419_
100
50
25
kHz
V
IH
V
IL
V
OL
I
LEAK
5
V
DD
= 3.4V to 5.25V
V
DD
< 3.4V
V
DD
= 2.7V to 5.25V (Note 4)
3mA sink current
2.4
0.7 x V
DD
0.8
0.4
±1
V
V
V
µA
pF
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX5417/MAX5418/MAX5419
TIMING CHARACTERISTICS
(V
DD
= +2.7V to +5.25V, H = V
DD
, L = GND, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= +5V, T
A
=
+25°C. See Figures 1 and 2.) (Note 7)
PARAMETER
ANALOG SECTION
MAX5417_
Wiper Settling Time (Note 8)
DIGITAL SECTION
SCL Clock Frequency
Setup Time for START Condition
Hold Time for START Condition
CLK High Time
CLK Low Time
f
SCL
t
SU-STA
t
HD-STA
t
HIGH
t
LOW
0.6
0.6
0.6
1.3
400
kHz
µs
µs
µs
µs
t
IL
MAX5418_
MAX5419_
500
600
1000
ns
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
_______________________________________________________________________________________
3
256-Tap, Nonvolatile, I
2
C-Interface,
Digital Potentiometers
MAX5417/MAX5418/MAX5419
TIMING CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.25V, H = V
DD
, L = GND, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= +5V, T
A
=
+25°C. See Figures 1 and 2.) (Note 7)
PARAMETER
Data Setup Time
Data Hold Time
SDA, SCL Rise Time
SDA, SCL Fall Time
Setup Time for STOP Condition
Bus Free Time Between STOP
and START Condition
Pulse Width of Spike Suppressed
Maximum Capacitive Load for
Each Bus Line
Write NV Register Busy Time
SYMBOL
t
SU-DAT
t
HD-DAT
t
R
t
F
t
SU-STO
t
BUF
t
SP
C
B
t
BUSY
(Note 9)
(Note 10)
400
12
Minimum power-up rate = 0.2V/ms
0.6
1.3
50
CONDITIONS
MIN
100
0
0.9
300
300
TYP
MAX
UNITS
ns
µs
ns
ns
µs
µs
ns
pF
ms
Note 1:
The DNL and INL are measured with the potentiometer configured as a voltage-divider with H = V
DD
and L = GND. The
wiper terminal is unloaded and measured with a high-input-impedance voltmeter.
Note 2:
The DNL and INL are measured with the potentiometer configured as a variable resistor. H is unconnected and L = GND.
For the 5V condition, the wiper terminal is driven with a source current of 80µA for the 50kΩ configuration, 40µA for the
100kΩ configuration, and 20µA for the 200kΩ configuration. For the 3V condition, the wiper terminal is driven with a source
current of 40µA for the 50kΩ configuration, 20µA for the 100kΩ configuration, and 10µA for the 200kΩ configuration.
Note 3:
The wiper resistance is measured using the source currents given in Note 2. For operation to V
DD
= 2.7V, see Wiper
Resistance vs. Temperature in the
Typical Operating Characteristics.
Note 4:
The device draws higher supply current when the digital inputs are driven with voltages between (V
DD
- 0.5V) and (GND +
0.5V). See Supply Current vs. Digital Input Voltage in the
Typical Operating Characteristics.
Note 5:
Wiper at midscale with a 10pF load (DC measurement). L = GND; an AC source is applied to H; and the W output is mea-
sured. A 3dB bandwidth occurs when the AC W/H value is 3dB lower than the DC W/H value.
Note 6:
The programming current operates only during power-up and NV writes.
Note 7:
SCL clock period includes rise and fall times t
R
and t
F
. All digital input signals are specified with t
R
= t
F
= 2ns and timed
from a voltage level of (V
IL
+ V
IH
) / 2.
Note 8:
Wiper settling time is the worst-case 0% to 50% rise time measured between consecutive wiper positions. H = V
DD
,
L = GND, and the wiper terminal is unloaded and measured with a 10pF oscilloscope probe (see the
Typical Operating
Characteristics
for the tap-to-tap switching transient).
Note 9:
An appropriate bus pullup resistance must be selected depending on board capacitance. Refer to the document linked to
this web address: www.semiconductors.philips.com/acrobat/literature/9398/39340011.pdf.
Note 10:
The idle time begins from the initiation of the stop pulse.
4
_______________________________________________________________________________________
256-Tap, Nonvolatile, I
2
C-Interface,
Digital Potentiometers
Typical Operating Characteristics
(V
DD
= +5V, T
A
= +25°C, unless otherwise noted.)
MAX5417/MAX5418/MAX5419
DNL vs. TAP POSITION
MAX5417 toc01
INL vs. TAP POSITION
MAX5417 toc02
WIPER RESISTANCE vs. TAP POSITION
V
DD
= 2.7V
I
SRC
= 50µA
MAX5417 toc03
0.25
0.20
0.15
RESISTANCE DNL (LSB)
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
-0.25
0
32
64
96
VOLTAGE-DIVIDER MODE
0.25
0.20
0.15
RESISTANCE INL (LSB)
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
-0.25
VOLTAGE-DIVIDER MODE
700
600
RESISTANCE (Ω)
500
400
300
200
100
0
128 160 192 224 256
0
32
64
96
128 160 192 224 256
0
32
64
96
128 160 192 224 256
TAP POSITION
TAP POSITION
TAP POSITION
WIPER TRANSIENT AT POWER-ON
MAX5417 toc04
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
END-TO-END RESISTANCE % CHANGE
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-40
-15
10
35
60
85
MAX5417 toc05
V
DD
2V/div
1.0
W
1V/div
C
L
= 10pF
TAP = 128
H = V
DD
4µs/div
TEMPERATURE (°C)
STANDBY SUPPLY CURRENT
vs. TEMPERATURE
MAX5417 toc06
WIPER RESISTANCE vs. TEMPERATURE
MAX5417 toc07
1.0
STANDBY SUPPLY CURRENT (µA)
700
600
RESISTANCE (Ω)
500
400
300
200
V
DD
= 2.7V
V
DD
= 3.0V
V
DD
= 4.5V
V
DD
= 5.25V
0.8
0.6
0.4
0.2
100
0
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
0
_______________________________________________________________________________________
5
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