19-3665; Rev 1; 7/09
KIT
ATION
EVALU
E
BL
AVAILA
One-Time Programmable, Linear-Taper Digital
Potentiometers
General Description
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 poten-
tiometers 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 inter-
face 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.
Features
o
Wiper Position Stored After One-Time Fuse
Programming
o
64 Tap Positions
o
Wiper Position Programmed Through Simple
2-Wire Up/Down Interface
°
o
35ppm/°C End-to-End Temperature Coefficient
°
o
5ppm/°C Ratiometric Temperature Coefficient
o
Ultra-Low 1.5µA (max) Static Supply Current
o
+2.7V to +5.5V Single-Supply Operation
o
10kΩ, 50kΩ, and 100kΩ End-to-End Resistances
o
Tiny, 3mm x 3mm, 8-Pin TDFN and 5mm x 3mm,
8-Pin
µMAX
Packages
MAX5527/MAX5528/MAX5529
Ordering Information
PART
PIN-PACKAGE
RESISTANCE
(kΩ)
100
100
50
50
10
10
TOP
MARK
AOG
—
AOH
—
AOI
—
Applications
Products Using One-Time Factory Calibration
Mechanical Potentiometer Replacements
MAX5527GTA+
8 TDFN-EP*
MAX5527GUA+ 8 µMAX
MAX5528GTA+
8 TDFN-EP*
MAX5528GUA+ 8 µMAX
MAX5529GTA+
8 TDFN-EP*
MAX5529GUA+ 8 µMAX
Pin Configurations
TOP VIEW
W 1
8 H
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
CS
2
7 L
Note:
All devices are specified over the -40°C to +105°C operat-
ing temperature range.
V
DD
3
MAX5527
MAX5528
MAX5529
6 U/D
Functional Diagram
H
S
63
GND 4
µMAX
U/D
H
L
5 PV
V
DD
GND
8
7
6
5
MAX5527
MAX5528
MAX5529
PV
R
62
S
62
R
61
CS
MAX5527
MAX5528
MAX5529
U/D
UP/DOWN
COUNTER
S
61
R
W
64-
POSITION
DECODER
R
1
S
1
R
0
S
0
L
W
S
2
PV
ONE-TIME
PROGRAM
BLOCK
1
W
2
CS
3
V
DD
4
GND
TDFN*
*EXPOSED PADDLE. CONNECT TO GND.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________
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.
One-Time Programmable, Linear-Taper Digital
Potentiometers
MAX5527/MAX5528/MAX5529
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND ...........................................................-0.3V to +6.0V
PV to GND ...........................................................-0.3V to +12.0V
All Other Pins to GND.................................-0.3V to (V
DD
+ 0.3V)
Maximum Continuous Current into H, L, and W
MAX5527 ......................................................................±0.5mA
MAX5528 ......................................................................±1.0mA
MAX5529 ......................................................................±2.0mA
Continuous Power Dissipation (T
A
= +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
(V
DD
= +2.7V to +5.5V, V
H
= V
DD
, V
L
= GND, T
A
= -40°C to +105°C, unless otherwise noted. Typical values are at V
DD
= +5.0V, T
A
= +25°C.) (Note 1)
PARAMETER
DC PERFORMANCE
Resolution
MAX5527
End-to-End Resistance
End-to-End Resistance
Temperature Coefficent
Resistance Ratio Temperature
Coefficient
Integral Nonlinearity
Differential Nonlinearity
Full-Scale Error
Zero-Scale Error
Wiper Resistance (Note 2)
DYNAMIC CHARACTERISTICS
MAX5527
Wiper -3dB Bandwidth (Note 3)
MAX5528
MAX5529
MAX5527
Total Harmonic Distortion
f = 10kHz, midscale, 1V
RMS
R
L
= 100kΩ
MAX5528
MAX5529
100
200
1000
-78
-82
-94
dB
kHz
R
W
INL
DNL
MAX5528
MAX5529
TC
R
MAX5527/MAX5528
MAX5529
Potentiometer configuration, no load,
Figure 1
Potentiometer configuration, no load,
Figure 1
Potentiometer configuration, no load,
Figure 1
Potentiometer configuration, no load,
Figure 1
V
DD
≥
3V
V
DD
< 3V
64
75
37.5
7.5
100
50
10
35
5
10
±0.025
±0.01
-0.005
+0.006
90
125
±1
±1
-1
+1
200
650
125
62.5
12.5
ppm/°C
ppm/°C
LSB
LSB
LSB
LSB
Ω
kΩ
Taps
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
One-Time Programmable, Linear-Taper Digital
Potentiometers
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.5V, V
H
= V
DD
, V
L
= GND, T
A
= -40°C to +105°C, unless otherwise noted. Typical values are at V
DD
= +5.0V, T
A
= +25°C.) (Note 1)
PARAMETER
DIGITAL INPUTS (CS, U/D)
Input High Voltage
Input Low Voltage
Input Current
Input Capacitance
TIMING CHARACTERISTICS (Note 4)
U/D Mode to
CS
Setup Time
U/D Mode to
CS
Hold Time
CS
to U/D Step Hold Time
U/D Step Low Time
U/D Step High Time
Wiper Settling Time
PV Rising Edge to
CS
Falling
Edge
CS
Falling Edge to PV Falling
Edge
CS
Step Low Time
CS
Step High Time
PV Falling Edge to
CS
Rising
Edge
U/D Frequency
Power-Up Time
POWER SUPPLY
Supply Voltage
Static Supply Current
Programming Voltage
Programming Current
V
DD
I
DD
PV
I
PV
CS
= U/D = GND or V
DD
T
A
< +50°C
T
A
≥
+50°C
V
PV
= 11V
10.45
11.00
4
2.7
5.5
1.5
11.55
11.55
5
V
µA
V
mA
t
CU
t
CI
t
IC
t
IL
t
IH
t
IW
t
PC
t
CP
t
CL
t
CH
t
PH
f
U/DMAX
t
UP
(Note 6)
Figures 2 and 3
Figures 2 and 3
Figures 2 and 3
Figures 2 and 3
Figures 2 and 3
C
L
= 0pF, Figures 2 and 3 (Note 5)
Figure 5
Figure 5
Figure 5
Figure 5
Figure 5
1
5
5
5
1
5
1
50
50
0
100
100
400
ns
ns
ns
ns
ns
ns
ms
ms
ms
ms
ms
MHz
ms
V
IH
V
IL
I
IN
C
IN
±0.1
5
0.7 x
V
DD
0.3 x
V
DD
±1
V
V
µA
pF
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX5527/MAX5528/MAX5529
Note 1:
All devices are production tested at T
A
= +25°C, and are guaranteed by design for T
A
= -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
One-Time Programmable, Linear-Taper Digital
Potentiometers
MAX5527/MAX5528/MAX5529
Typical Operating Characteristics
(V
DD
= +5.0V, T
A
= +25°C, unless otherwise noted.)
MAX5527 R-DNL ERROR
vs. WIPER POSITION
MAX5527 toc01
MAX5527 R-INL ERROR
vs. WIPER POSITION
MAX5527 toc02
MAX5528 R-DNL ERROR
vs. WIPER POSITION
MAX5527 toc03
0.010
0.010
0.010
0.005
R-DNL ERROR (LSB)
R-INL ERROR (LSB)
0.005
R-DNL ERROR (LSB)
0.005
0
0
0
-0.005
-0.005
-0.005
-0.010
0
16
32
WIPER POSITION
48
64
-0.010
0
16
32
WIPER POSITION
48
64
-0.010
0
16
32
WIPER POSITION
48
64
MAX5528 R-INL ERROR
vs. WIPER POSITION
MAX5527 toc04
MAX5529 R-DNL ERROR
vs. WIPER POSITION
MAX5527 toc05
MAX5529 R-INL ERROR
vs. WIPER POSITION
MAX5527 toc06
0.010
0.010
0.010
0.005
R-DNL ERROR (LSB)
R-INL ERROR (LSB)
0.005
R-INL ERROR (LSB)
0.005
0
0
0
-0.005
-0.005
-0.005
-0.010
0
16
32
WIPER POSITION
48
64
-0.010
0
16
32
WIPER POSITION
48
64
-0.010
0
16
32
WIPER POSITION
48
64
WIPER RESISTANCE vs. WIPER VOLTAGE
MAX5527 toc07
END-TO-END RESISTANCE PERCENTAGE
CHANGE vs. TEMPERATURE
MAX5527 toc08
W-TO-L RESISTANCE vs. WIPER POSITION
90
W-TO-L RESISTANCE (kΩ)
80
70
60
50
40
30
20
MAX5529
MAX5528
MAX5527
MAX5527 toc09
150
V
DD
= 3V
125
WIPER RESISTANCE (Ω)
100
V
DD
= 5V
75
50
25
0
0
MAX5527: V
DD
= 5V, I
SOURCE
= 50µA
V
DD
= 3V, I
SOURCE
= 30µA
MAX5528: V
DD
= 5V, I
SOURCE
= 100µA
V
DD
= 3V, I
SOURCE
= 60µA
MAX5529: V
DD
= 5V, I
SOURCE
= 500µA
V
DD
= 3V, I
SOURCE
= 300µA
1
2
3
4
5
0.4
END-TO-END RESISTANCE CHANGE (%)
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-40
-15
10
35
60
85
100
10
0
110
0
16
32
WIPER POSITION
48
64
TEMPERATURE (°C)
WIPER VOLTAGE (V)
4
_______________________________________________________________________________________
One-Time Programmable, Linear-Taper Digital
Potentiometers
Typical Operating Characteristics (continued)
(V
DD
= +5V, T
A
= +25°C, unless otherwise noted.)
STATIC SUPPLY CURRENT
vs. TEMPERATURE
MAX5527 toc10
MAX5527/MAX5528/MAX5529
STATIC SUPPLY CURRENT
vs. SUPPLY VOLTAGE
CS
= U/D = GND
250
SUPPLY CURRENT (nA)
200
150
100
50
0
MAX5527 toc11
SUPPLY CURRENT
vs. DIGITAL INPUT VOLTAGE
MAX5527 toc12
300
CS
= U/D = GND
250
SUPPLY CURRENT (nA)
V
DD
= 5V
200
150
100
50
0
-40
-15
10
35
60
85
300
1000
100
SUPPLY CURRENT (µA)
V
DD
= 5V
10
V
DD
= 3V
1
V
DD
= 3V
0.1
0.01
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
DIGITAL INPUT VOLTAGE (V)
110
TEMPERATURE (°C)
MIDSCALE WIPER RESPONSE
vs. FREQUENCY
MAX5527 toc13
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MIDSCALE, 1V
RMS
,
R
L
= 100kΩ
MAX5527 toc14
0
-3
MAX5529
-6
GAIN (dB)
-40
-50
-60
THD (dB)
-70
-80
-90
MAX5527
MAX5528
-9
MAX5528
-12
-15
-18
0.1
1
10
100
1000
10,000
FREQUENCY (kHz)
MAX5527
-100
MAX5529
-110
0.01
0.1
1
FREQUENCY (kHz)
10
100
TAP-TO-TAP SWITCHING TRANSIENT
MAX5527 toc15
U/D
2V/div
GND
OUTPUT
W
50mV/div
400ns
_______________________________________________________________________________________
5
FPGA/CPLD
京公网安备 11010802033920号
EEWORLD
