Maxim MAX5528GTA+ One-time programmable, linear-taper digital potentiometer Datasheet

19-3665; Rev 1; 7/09
KIT
ATION
EVALU
E
L
B
AVAILA
One-Time Programmable, Linear-Taper Digital
Potentiometers
The MAX5527/MAX5528/MAX5529 linear-taper digital
potentiometers perform the same function as mechanical
potentiometers, replacing the mechanics with a simple
2-wire up/down digital interface. These digital potentiometers provide an optional one-time programmable
feature that sets the power-on reset position of the wiper.
Once the wiper position is programmed, the 2-wire interface can be disabled to prevent unwanted adjustment.
The MAX5527/MAX5528/MAX5529 provide an end-to-end
resistance of 100kΩ, 50kΩ, and 10kΩ, respectively. The
devices feature low temperature coefficients of 35ppm/°C
end-to-end and 5ppm/°C ratiometric. All devices offer 64
wiper positions and operate from a single +2.7V to +5.5V
supply. An ultra-low, 0.25µA (typ) standby supply current
saves power in battery-operated applications.
The MAX5527/MAX5528/MAX5529 are available in
3mm x 3mm, 8-pin TDFN and 5mm x 3mm, 8-pin
µMAX® packages. Each device is guaranteed over the
-40°C to +105°C temperature range.
Applications
Features
♦ Wiper Position Stored After One-Time Fuse
Programming
♦ 64 Tap Positions
♦ Wiper Position Programmed Through Simple
2-Wire Up/Down Interface
♦ 35ppm/°°C End-to-End Temperature Coefficient
♦ 5ppm/°°C Ratiometric Temperature Coefficient
♦ Ultra-Low 1.5μA (max) Static Supply Current
♦ +2.7V to +5.5V Single-Supply Operation
♦ 10kΩ, 50kΩ, and 100kΩ End-to-End Resistances
♦ Tiny, 3mm x 3mm, 8-Pin TDFN and 5mm x 3mm,
8-Pin µMAX Packages
Ordering Information
RESISTANCE
(kΩ)
TOP
MARK
MAX5527GTA+ 8 TDFN-EP*
100
AOG
PART
PIN-PACKAGE
MAX5527GUA+ 8 µMAX
100
—
Products Using One-Time Factory Calibration
MAX5528GTA+ 8 TDFN-EP*
50
AOH
Mechanical Potentiometer Replacements
MAX5528GUA+ 8 µMAX
50
—
MAX5529GTA+ 8 TDFN-EP*
10
AOI
MAX5529GUA+ 8 µMAX
10
—
Pin Configurations
TOP VIEW
W 1
8 H
CS 2
7 L
MAX5527
MAX5528
MAX5529
VDD 3
+Denotes a lead(Pb)-free/RoHs-compliant package.
*EP = Exposed pad.
Note: All devices are specified over the -40°C to +85°C operating temperature range.
Functional Diagram
6 U/D
H
5 PV
GND 4
S63
H
L
U/D
PV
μMAX
VDD
8
7
6
5
GND
R62
MAX5527
MAX5528
MAX5529
S62
R61
CS
U/D
MAX5527
MAX5528
MAX5529
1
2
3
4
W
CS
VDD
GND
PV
UP/DOWN
COUNTER
S61 RW
64POSITION
DECODER
W
S2
ONE-TIME
PROGRAM
BLOCK
R1
S1
R0
S0
TDFN*
*EXPOSED PADDLE. CONNECT TO GND.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
L
________________________________________________________________ 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.
1
MAX5527/MAX5528/MAX5529
General Description
MAX5527/MAX5528/MAX5529
One-Time Programmable, Linear-Taper Digital
Potentiometers
ABSOLUTE MAXIMUM RATINGS
VDD to GND ...........................................................-0.3V to +6.0V
PV to GND ...........................................................-0.3V to +12.0V
All Other Pins to GND.................................-0.3V to (VDD + 0.3V)
Maximum Continuous Current into H, L, and W
MAX5527 ......................................................................±0.5mA
MAX5528 ......................................................................±1.0mA
MAX5529 ......................................................................±2.0mA
Continuous Power Dissipation (TA = +70°C)
8-Pin µMAX (derate 4.5mW/°C above +70°C) ..............362mW
8-Pin TDFN (derate 18.2mW/°C above +70°C) .......1454.5mW
Operating Temperature Range .........................-40°C to +105°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°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
(VDD = +2.7V to +5.5V, VH = VDD, VL = GND, TA = -40°C to +105°C, unless otherwise noted. Typical values are at VDD = +5.0V, TA
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC PERFORMANCE
Resolution
64
End-to-End Resistance
End-to-End Resistance
Temperature Coefficent
75
100
125
MAX5528
37.5
50
62.5
MAX5529
7.5
10
12.5
TCR
Resistance Ratio Temperature
Coefficient
Taps
MAX5527
35
MAX5527/MAX5528
5
MAX5529
10
kΩ
ppm/°C
ppm/°C
Integral Nonlinearity
INL
Potentiometer configuration, no load,
Figure 1
±0.025
±1
LSB
Differential Nonlinearity
DNL
Potentiometer configuration, no load,
Figure 1
±0.01
±1
LSB
Full-Scale Error
Potentiometer configuration, no load,
Figure 1
-0.005
-1
LSB
Zero-Scale Error
Potentiometer configuration, no load,
Figure 1
+0.006
+1
LSB
VDD ≥ 3V
90
200
VDD < 3V
125
650
MAX5527
100
Wiper Resistance (Note 2)
RW
Ω
DYNAMIC CHARACTERISTICS
Wiper -3dB Bandwidth (Note 3)
Total Harmonic Distortion
2
MAX5528
200
MAX5529
1000
f = 10kHz, midscale, 1VRMS
RL = 100kΩ
MAX5527
-78
MAX5528
-82
MAX5529
-94
_______________________________________________________________________________________
kHz
dB
One-Time Programmable, Linear-Taper Digital
Potentiometers
(VDD = +2.7V to +5.5V, VH = VDD, VL = GND, TA = -40°C to +105°C, unless otherwise noted. Typical values are at VDD = +5.0V, TA
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DIGITAL INPUTS (CS, U/D)
0.7 x
VDD
Input High Voltage
VIH
V
Input Low Voltage
VIL
Input Current
IIN
±0.1
Input Capacitance
CIN
5
0.3 x
VDD
V
±1
µA
pF
TIMING CHARACTERISTICS (Note 4)
U/D Mode to CS Setup Time
tCU
Figures 2 and 3
50
ns
U/D Mode to CS Hold Time
tCI
Figures 2 and 3
50
ns
CS to U/D Step Hold Time
tIC
Figures 2 and 3
0
ns
U/D Step Low Time
tIL
Figures 2 and 3
100
ns
U/D Step High Time
tIH
Figures 2 and 3
100
Wiper Settling Time
tIW
CL = 0pF, Figures 2 and 3 (Note 5)
PV Rising Edge to CS Falling
Edge
tPC
Figure 5
1
ms
CS Falling Edge to PV Falling
Edge
tCP
Figure 5
5
ms
CS Step Low Time
tCL
Figure 5
5
ms
CS Step High Time
tCH
Figure 5
5
ms
PV Falling Edge to CS Rising
Edge
tPH
Figure 5
1
ms
U/D Frequency
fU/DMAX
Power-Up Time
tUP
ns
400
ns
5
MHz
1
ms
2.7
5.5
V
1.5
µA
TA < +50°C
10.45
11.55
TA ≥ +50°C
11.00
11.55
(Note 6)
POWER SUPPLY
Supply Voltage
VDD
Static Supply Current
IDD
Programming Voltage
PV
Programming Current
IPV
CS = U/D = GND or VDD
VPV = 11V
4
5
V
mA
Note 1: All devices are production tested at TA = +25°C, and are guaranteed by design for TA = -40°C to +105°C.
Note 2: The wiper resistance is measured by driving the wiper terminal with a source of 20µA for the MAX5527, 40µA for the
MAX5528, and 200µA for the MAX5529.
Note 3: Wiper at midscale with a 10pF load.
Note 4: Digital timing is guaranteed by design, not production tested.
Note 5: Wiper setting time is measured for a single step from U/D transition until wiper voltage reaches 90% of final value.
Note 6: Power-up time is the period of time from when the power supply is applied, until the serial interface is ready for writing.
_______________________________________________________________________________________
3
MAX5527/MAX5528/MAX5529
ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics
(VDD = +5.0V, TA = +25°C, unless otherwise noted.)
R-DNL ERROR (LSB)
0
-0.005
0
-0.010
-0.010
16
0
32
48
64
16
0
32
48
0
64
MAX5528 R-INL ERROR
vs. WIPER POSITION
MAX5529 R-DNL ERROR
vs. WIPER POSITION
MAX5529 R-INL ERROR
vs. WIPER POSITION
0.005
R-INL ERROR (LSB)
0
-0.005
-0.005
-0.010
-0.010
-0.010
0
16
32
64
48
0
16
32
WIPER RESISTANCE vs. WIPER VOLTAGE
END-TO-END RESISTANCE PERCENTAGE
CHANGE vs. TEMPERATURE
VDD = 5V
75
MAX5527: VDD = 5V, ISOURCE = 50μA
VDD = 3V, ISOURCE = 30μA
MAX5528: VDD = 5V, ISOURCE = 100μA
VDD = 3V, ISOURCE = 60μA
MAX5529: VDD = 5V, ISOURCE = 500μA
VDD = 3V, ISOURCE = 300μA
1
2
3
WIPER VOLTAGE
4
48
64
W-TO-L RESISTANCE vs. WIPER POSITION
MAX5527 toc08
0.3
0.2
0.1
0
-0.1
-0.2
90
80
MAX5527
70
60
MAX5528
50
40
30
20
-0.3
MAX5529
10
-0.4
5
32
100
W-TO-L RESISTANCE (kΩ)
100
0.4
END-TO-END RESISTANCE CHANGE (%)
MAX5527 toc07
VDD = 3V
16
WIPER POSITION
WIPER POSITION
125
0
64
48
WIPER POSITION
150
0
MAX5527 toc09
R-DNL ERROR (LSB)
-0.005
64
MAX5527 toc06
0.010
MAX5527 toc05
0.010
MAX5527 toc04
0
0
48
WIPER POSITION
0.005
0
32
WIPER POSITION
0.005
25
16
WIPER POSITION
0.010
50
0
-0.005
-0.005
-0.010
R-INL ERROR (LSB)
0.005
0.005
R-INL ERROR (LSB)
R-DNL ERROR (LSB)
0.005
0.010
MAX5527 toc02
0.010
MAX5527 toc01
0.010
4
MAX5528 R-DNL ERROR
vs. WIPER POSITION
MAX5527 R-INL ERROR
vs. WIPER POSITION
MAX5527 toc03
MAX5527 R-DNL ERROR
vs. WIPER POSITION
WIPER RESISTANCE (Ω)
MAX5527/MAX5528/MAX5529
One-Time Programmable, Linear-Taper Digital
Potentiometers
0
-40
-15
10
35
60
TEMPERATURE (°C)
85
110
0
16
32
WIPER POSITION
_______________________________________________________________________________________
48
64
One-Time Programmable, Linear-Taper Digital
Potentiometers
SUPPLY CURRENT (nA)
200
150
VDD = 3V
150
100
MAX5527 toc12
100
200
VDD = 5V
10
VDD = 3V
1
0.1
50
50
0
0
0.01
35
60
85
110
0
2.5
3.0
TEMPERATURE (°C)
3.5
4.0
4.5
5.0
5.5
1
2
3
4
5
6
DIGTAL INPUT VOLTAGE (V)
SUPPLY VOLTAGE (V)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MIDSCALE WIPER RESPONSE
vs. FREQUENCY
0
-40
-3
MIDSCALE, 1VRMS,
RL = 100kΩ
-50
MAX5529
MAX5527 toc14
10
-60
-6
THD (dB)
-15
MAX5527 toc13
-40
GAIN (dB)
SUPPLY CURRENT (nA)
CS = U/D = GND
250
VDD = 5V
100
MAX5527 toc11
CS = U/D = GND
1000
300
MAX5527 toc10
300
250
SUPPLY CURRENT
vs. DIGITAL INPUT VOLTAGE
STATIC SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY CURRENT (μA)
STATIC SUPPLY CURRENT
vs. TEMPERATURE
-9
MAX5528
-12
MAX5527
-70
MAX5528
-80
-90
MAX5527
-15
-100
MAX5529
-110
-18
0.1
1
10
100
1000
10,000
0.01
0.1
1
10
100
FREQUENCY (kHz)
FREQUENCY (kHz)
TAP-TO-TAP SWITCHING TRANSIENT
MAX5527 toc15
U/D
2V/div
GND
OUTPUT
W
50mV/div
400ns
_______________________________________________________________________________________
5
MAX5527/MAX5528/MAX5529
Typical Operating Characteristics (continued)
(VDD = +5V, TA = +25°C, unless otherwise noted.)
MAX5527/MAX5528/MAX5529
One-Time Programmable, Linear-Taper Digital
Potentiometers
Typical Operating Characteristics (continued)
(VDD = +5V, TA = +25°C, unless otherwise noted.)
TAP-TO-TAP SWITCHING TRANSIENT
MAX5527 POWER-UP WIPER TRANSIENT
MAX5527 toc16
MAX5527 toc17
U/D
2V/div
VDD
2V/div
GND
GND
OUTPUT
W
50mV/div
400ns
OUTPUT
W
2V/div
GND
2μs
MAX5528 POWER-UP WIPER TRANSIENT
MAX5529 POWER-UP WIPER TRANSIENT
MAX5527 toc18
MAX5527 toc19
OUTPUT
W
2V/div
GND
VDD
2V/div
GND
OUTPUT
W
2V/div
GND
1μs
6
VDD
2V/div
GND
2μs
_______________________________________________________________________________________
One-Time Programmable, Linear-Taper Digital
Potentiometers
PIN
NAME
DESCRIPTION
1
W
Wiper Connection
2
CS
Chip-Select Input. A high-to-low CS transition determines the increment/decrement mode. Increment
if U/D is high, or decrement if U/D is low. CS is also used for one-time programming. See the PV OneTime Programming section.
3
VDD
Supply Voltage. Bypass with a 0.1µF capacitor to GND.
4
GND
Ground
5
PV
One-Time Programming Voltage. Connect PV to an 11V supply at the time the device is
programmed/locked, and bypass with a 22µF capacitor to GND. For normal operation, connect to
GND or leave floating.
6
U/D
Up/Down Control Input. When CS is low, a low-to-high transition at U/D increments or decrements the
wiper position. See the Digital Interface Operation section.
7
L
Resistor Low Terminal
8
H
Resistor High Terminal
—
EP
Exposed Pad (TDFN Only). Internally connected to GND. Connect to a large ground plane to
maximize thermal dissipation.
Detailed Description
The MAX5527/MAX5528/MAX5529 100kΩ/50kΩ/10kΩ
end-to-end resistance digitally-controlled potentiometers offer 64 wiper tap positions accessible along the
resistor array between H and L. These devices function
as potentiometers or variable resistors (see Figure 1).
The wiper (W) position is adjusted sequentially through
the tap positions using a simple 2-wire up/down interface. These digital potentiometers provide an optional
one-time programmable feature that sets and locks the
power-on reset position of the wiper (see the PV OneTime Programming section). Once the desired wiper
position is programmed, the 2-wire interface can be
disabled to prevent unwanted adjustment.
Digital Interface Operation
The MAX5527/MAX5528/MAX5529 provide two modes
of operation when the serial interface is active: increment mode or decrement mode. The serial interface is
only active when CS is low.
The CS and U/D inputs control the position of the wiper
along the resistor array. Set U/D high to increment the
MAX5527/MAX5528/MAX5529 when CS transitions
from high to low (Figure 2). Set U/D low to decrement
the MAX5527/MAX5528/MAX5529 when CS transitions
high to low (Figure 3). Once CS is held low, each lowto-high transition at U/D increments or decrements the
wiper one position. Once the increment or decrement
POTENTIOMETER
CONFIGURATION
VARIABLE-RESISTOR
CONFIGURATION
H
H
W
W
L
L
Figure 1. Potentiometer/Variable-Resistor Configuration
mode is set, the device remains in that mode until CS
goes high.
Idle U/D high for normal operation. If U/D is low when
CS transitions low to high, the wiper moves one additional tap in its present direction. The wiper remains in
the same position when U/D is high and CS transitions
low to high. After CS returns high, the wiper position
remains the same (Figure 4).
Additional increments do not change the wiper position
when the wiper is at the maximum end of the resistor
array. Additional decrements do not change the wiper
position when the wiper is at the minimum end of the
resistor array.
_______________________________________________________________________________________
7
MAX5527/MAX5528/MAX5529
Pin Description
MAX5527/MAX5528/MAX5529
One-Time Programmable, Linear-Taper Digital
Potentiometers
VDD
tUP
CS
tCU
tCI
tIL
tIH
tIC
U/D
tIW
VW
Figure 2. Increment-Mode Timing Diagram
VDD
tUP
CS
tCU
tCI
tIH
tIL
tIC
U/D
tIW
VW
Figure 3. Decrement-Mode Timing Diagram
CS
U/D
VW
WIPER REMAINS THE
SAME WITH U/D
HIGH AND CS RISING
WIPER CHANGES
WITH U/D LOW AND
CS RISING
Figure 4. CS Low-to-High Transition Timing Diagram
PV One-Time Programming
The MAX5527/MAX5528/MAX5529 power up and function after power-up with the wiper position set in one of
three ways:
1) Factory default power-up position, midscale, adjustable
wiper
3) A new programmed power-up position, locked wiper
The wiper is set to the factory default position at powerup (midscale, tap 31). Connect PV to GND or leave
floating to continue powering up the wiper position at
midscale. See Table 1 for the default and one-time programming options.
2) A newly programmed power-up position, adjustable
wiper
8
_______________________________________________________________________________________
One-Time Programmable, Linear-Taper Digital
Potentiometers
+11V
PV
0V
tCH
tCL
tCP
tPH
CS
tPC
OPTIONAL 7TH
LOCKOUT BIT
6 PULSES RECORD WIPER POSITION
Figure 5. One-Time Program Mode, Serial-Interface Timing Diagram
Table 1. One-Time Programming Options
POWER-ON RESET
WIPER POSITION
MODE
ADJUSTABLE
WIPER
Factory Default
(Unprogrammed)
Tap 31
Yes
Programmed by
Six CS Pulses
Programmed position
Yes
Programmed by
Seven CS Pulses
Programmed position
No
3)
4a)
4b)
5)
6)
PV
11V
22μF
LPARASITIC
< 250μH
RPARASITIC
< 40Ω
MAX5527
MAX5528
MAX5529
Figure 6. PV Power-Supply Decoupling
Change the wiper’s power-up position using the PV
one-time programming sequence after power-up (see
Figure 5). After setting the wiper to the desired powerup position, perform the following six-step sequence:
1)
2)
TRACE PARASITICS
Set U/D and CS high.
Connect an external voltage source at PV in the
range of +11V to +11.55V.
Pull CS low.
Pulse CS high for six cycles, consisting of CS
starting low and going high for at least tCH, and
then low for at least t CL, to change the wiper
power-up position. The wiper remains adjustable.
Pulse CS high for seven cycles, consisting of CS
starting low and going high for at least tCH and then
low for at least tCL, to change the wiper power-up
position and lock the wiper in that same position.
The seventh CS pulse is labeled the optional lockout bit in Figure 5.
Connect PV to GND or release the voltage source,
leaving PV floating.
Pull CS high.
Pulse CS high for six cycles to change the wiper powerup position. The wiper position returns to this programmed position on power-up, but remains adjustable.
Pulse CS high for seven cycles to lock the MAX5527/
MAX5528/MAX5529 to a specific wiper position with no
further adjustments allowed. This effectively converts
the potentiometer to a fixed resistor-divider. The seventh pulse locks the wiper position and disables the
up/down interface. Once locked, connect U/D and CS
high, low, or leave them floating without increasing the
supply current (see Table 1).
If six clock pulses are used, the interface is enabled
and the device can be put into program mode again.
However, the part uses one-time programmable (OTP)
memory and should be programmed only once. If the
part is programmed more than once, all applied values
are ORed together. Thus, if 010101 is programmed the
first time and 101010 is programmed the second time,
the result will be 111111.
The external PV power supply must source at least 5mA
and have a good transient response. Decouple the PV
power supply with a 22µF capacitor to GND. Ensure that
no more than 250µH of inductance and/or 40Ω of parasitic resistance exists between the capacitor and the
device (see Figure 6).
_______________________________________________________________________________________
9
MAX5527/MAX5528/MAX5529
U/D
MAX5527/MAX5528/MAX5529
One-Time Programmable, Linear-Taper Digital
Potentiometers
5V
5V
H
30V
30V
W
MAX5527
MAX5528
MAX5529
VOUT
VOUT
H
MAX5527
MAX5528
MAX5529
L
W
L
Figure 7. Positive LCD Bias Control Using a Voltage-Divider
+5V
W
VIN
5V
L
H
Figure 8. Positive LCD Bias Control Using a Variable Resistor
R3
C
VIN
V0 REF
OUT
VOUT
H
R1
MAX6160
ADJ
R1
GND
MAX5527
MAX5528
MAX5529
W
R2
L
H
MAX5527
MAX5528
MAX5529
R2
W
L
Figure 9. Programmable Filter
Applications Information
Use the MAX5527/MAX5528/MAX5529 in applications
requiring digitally controlled adjustable resistance,
such as LCD contrast control where voltage biasing
adjusts the display contrast, or for programmable filters
with adjustable gain and/or cutoff frequency.
Positive LCD Bias Control
Figures 7 and 8 show an application where the voltagedivider or variable resistor is used to make an adjustable,
positive LCD bias voltage. The op-amp provides buffering and gain to the resistor-divider network made by the
potentiometer (Figure 7), or to a fixed resistor and a
variable resistor (Figure 8).
V0 = 1.23V 100kΩ FOR THE MAX5527
R2(kΩ)
V0 = 1.23V 50kΩ FOR THE MAX5528
R2(kΩ)
V0 = 1.23V 10kΩ FOR THE MAX5529
R2(kΩ)
Figure 10. Adjustable Voltage Reference
Programmable Filter
Figure 9 shows the configuration for a 1st-order programmable filter. The gain of the filter is adjusted by
R2, and the cutoff frequency is adjusted by R3. Use the
following equations to calculate the gain (G), and the
-3dB cutoff frequency (fC), only up to frequencies one
decade below the wiper -3dB bandwidth.
R1
R2
1
fC =
2π x R 3 x C
G =1+
Adjustable Voltage Reference
Figure 10 shows the MAX5527/MAX5528/MAX5529
used as the feedback resistors in an adjustable-voltage
reference application.
10
______________________________________________________________________________________
One-Time Programmable, Linear-Taper Digital
Potentiometers
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages. Note that a "+", "#", or "-" in
the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
PACKAGE TYPE
PACKAGE CODE
DOCUMENT NO.
8 TDFN-EP
T833+2
21-0137
8 µMAX
U8+1
21-0036
Chip Information
TRANSISTOR COUNT: 3420
PROCESS: BiCMOS
______________________________________________________________________________________
11
MAX5527/MAX5528/MAX5529
Package Information
Layout and Power-Supply Considerations
Proper layout and power-supply bypassing can affect
device performance. Bypass VDD with a 0.1µF capacitor
as close to the device as possible. When programming
the wiper position, bypass PV with a 22µF capacitor as
close to the device as possible. For a VDD power supply
with a slew rate greater than 1V/µs or in applications
where power-supply overshoot is prevalent, connect a
10Ω resistor in series to VDD and bypass VDD with an
additional 4.7µF capacitor to ground.
MAX5527/MAX5528/MAX5529
One-Time Programmable, Linear-Taper Digital
Potentiometers
Revision History
REVISION
NUMBER
REVISION
DATE
0
5/05
Initial release
1
7/09
Added lead-free note to the Ordering Information. Added exposed pad information to
the Pin Description. Added text to PV One-Time Programming section.
DESCRIPTION
PAGES
CHANGED
—
1, 7, 9
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implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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