max5528 Maxim Integrated Products, Inc., max5528 Datasheet

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max5528

Manufacturer Part Number
max5528
Description
64-tap, One-time Programmable, Linear-taper Digital Potentiometers
Manufacturer
Maxim Integrated Products, Inc.
Datasheet

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max5528GUA+
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Maxim Integrated Products
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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
-40°C to +105°C temperature range.
19-3665; Rev 0; 5/05
µMAX is a registered trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
One-Time Programmable, Linear-Taper Digital
®
Products Using One-Time Factory Calibration
Mechanical Potentiometer Replacements
packages. Each device is guaranteed over the
TOP VIEW
*EXPOSED PADDLE. CONNECT TO GND.
GND
V
CS
DD
W
________________________________________________________________ Maxim Integrated Products
8
1
1
2
3
4
General Description
2
7
MAX5527
MAX5528
MAX5529
TDFN*
Pin Configurations
µMAX
MAX5527
MAX5528
MAX5529
3
6
8
7
6
5
Applications
5
H
L
U/D
PV
4
♦ Wiper Position Stored After One-Time Fuse
♦ 64 Tap Positions
♦ Wiper Position Programmed Through Simple
♦ 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,
*EP = Exposed pad.
MAX5527GTA
MAX5527GUA
MAX5528GTA
MAX5528GUA
MAX5529GTA
MAX5529GUA
All devices operate over the -40°C to +105°C temperature range.
Programming
2-Wire Up/Down Interface
8-Pin µMAX Packages
GND
V
U/D
CS
PV
DD
PART
MAX5527
MAX5528
MAX5529
PROGRAM
UP/DOWN
ONE-TIME
COUNTER
BLOCK
8 TDFN-EP*
8 µMAX
8 TDFN-EP*
8 µMAX
8 TDFN-EP*
8 µMAX
PIN-PACKAGE
Potentiometers
Ordering Information
Functional Diagram
DECODER
POSITION
64-
RESISTANCE
H
L
(kΩ)
100
100
R
R
R
R
50
50
10
10
62
61
1
0
Features
S
S
S
S
S
S
63
62
61
2
1
0
R
W
MARK
AOG
AOH
TOP
AOI
W
1

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max5528 Summary of contents

Page 1

... 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/° ...

Page 2

... All Other Pins to GND.................................-0. Maximum Continuous Current into H, L, and W MAX5527 ......................................................................±0.5mA MAX5528 ......................................................................±1.0mA MAX5529 ......................................................................±2.0mA 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 ...

Page 3

... Note 1: All devices are production tested at T 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. ...

Page 4

... Potentiometers (V = +5.0V +25°C, unless otherwise noted MAX5527 R-DNL ERROR vs. WIPER POSITION 0.010 0.005 0 -0.005 -0.010 WIPER POSITION MAX5528 R-INL ERROR vs. WIPER POSITION 0.010 0.005 0 -0.005 -0.010 WIPER POSITION WIPER RESISTANCE vs. WIPER VOLTAGE 150 125 100 ...

Page 5

... TAP-TO-TAP SWITCHING TRANSIENT MAX5527 toc15 400ns Potentiometers SUPPLY CURRENT vs. DIGITAL INPUT VOLTAGE 1000 100 0.1 0. 5.5 DIGTAL INPUT VOLTAGE (V) vs. FREQUENCY , RMS MAX5527 MAX5528 1 10 100 FREQUENCY (kHz) U/D 2V/div GND OUTPUT W 50mV/div ...

Page 6

... One-Time Programmable, Linear-Taper Digital Potentiometers (V = +5V +25°C, unless otherwise noted TAP-TO-TAP SWITCHING TRANSIENT MAX5528 POWER-UP WIPER TRANSIENT 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) MAX5527 POWER-UP WIPER TRANSIENT MAX5527 toc16 U/D 2V/div GND OUTPUT W 50mV/div 400ns MAX5529 POWER-UP WIPER TRANSIENT MAX5527 toc18 ...

Page 7

... 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 low- to-high transition at U/D increments or decrements the wiper one position. Once the increment or decrement mode is set, the device remains in that mode until CS goes high ...

Page 8

... CS U Low-to-High Transition Timing Diagram Figure 4. PV One-Time Programming The MAX5527/MAX5528/MAX5529 power up and func- tion after power-up with the wiper position set in one of three ways: 1) Factory default power-up position, midscale, adjustable wiper 2) A newly programmed power-up position, adjustable wiper ...

Page 9

... The wiper position returns to this pro- grammed 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 sev- enth pulse locks the wiper position and disables the up/down interface ...

Page 10

... 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 (f decade below the wiper -3dB bandwidth. Figure 10 shows the MAX5527/MAX5528/MAX5529 used as the feedback resistors in an adjustable-voltage reference application. 5V 30V ...

Page 11

One-Time Programmable, Linear-Taper Digital Layout and Power-Supply Considerations Proper layout and power-supply bypassing can affect device performance. Bypass close to the device as possible. When programming the wiper position, bypass PV with a 22µF capacitor as close ...

Page 12

One-Time Programmable, Linear-Taper Digital Potentiometers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) COMMON DIMENSIONS SYMBOL MIN. MAX. A 0.70 0.80 D 2.90 3.10 E ...

Page 13

... Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 © 2005 Maxim Integrated Products Package Information (continued BOTTOM VIEW SIDE VIEW Printed USA is a registered trademark of Maxim Integrated Products, Inc. Potentiometers INCHES MILLIMETERS MAX MIN DIM MIN MAX A - 0.043 - 1.10 A1 ...

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