MAX5527, MAX5528, MAX5529 64-Tap, One-Time Programmable, Linear-Taper Digital Potentiometers
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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 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 100kÙ, 50kÙ, and 10kÙ, 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, 0.25ìA (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 ìMAX® packages. Each device is guaranteed over the -40°C to +105°C temperature range. Applications Products Using One-Time Factory Calibration Mechanical Potentiometer Replacements 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 1.5ìA (max) Static Supply Current +2.7V to +5.5V Single-Supply Operation 10kÙ, 50kÙ, and 100kÙ End-to-End Resistances Tiny, 3mm x 3mm, 8-Pin TDFN and 5mm x 3mm, 8-Pin ìMAX Packages MAX5527/MAX5528/MAX5529 One-Time Programmable, Linear-Taper Digital Potentiometers ________________________________________________________________ Maxim Integrated Products 1 Ordering Information 19-3665; Rev 1; 7/09 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. EVALUATION KIT AVAILABLE PART PIN-PACKAGE RESISTANCE (kÙ) TOP MARK MAX5527GTA+ 8 TDFN-EP* 100 AOG MAX5527GUA+ 8 ìMAX 100 — MAX5528GTA+ 8 TDFN-EP* 50 AOH MAX5528GUA+ 8 ìMAX 50 — MAX5529GTA+ 8 TDFN-EP* 10 AOI MAX5529GUA+ 8 ìMAX 10 — +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. Note: All devices are specified over the -40°C to +105°C operating temperature range. 1 H VDD CS GND ìMAX TDFN* TOP VIEW 2 3 4 L U/D PV 8 7 6 5 W *EXPOSED PADDLE. CONNECT TO GND. MAX5527 MAX5528 MAX5529 1 H VDD CS GND 2 3 4 L U/D PV 8 7 6 5 W MAX5527 MAX5528 MAX5529 Pin Configurations ìMAX is a registered trademark of Maxim Integrated Products, Inc. Functional Diagram MAX5527 MAX5528 MAX5529 64- POSITION DECODER UP/DOWN COUNTER ONE-TIME PROGRAM BLOCK VDD GND CS U/D PV L H W R62 R61 R1 R0 S63 S62 S61 S2 S1 S0 RW

MAX5527/MAX5528/MAX5529 One-Time Programmable, Linear-Taper Digital Potentiometers _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (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) Input High Voltage VIH 0.7 x VDD V Input Low Voltage VIL 0.3 x VDD V Input Current IIN ±0.1 ±1 ìA Input Capacitance CIN 5 pF TIMING CHARACTERISTICS (Note 4) U/D Mode to...

MAX5527/MAX5528/MAX5529 One-Time Programmable, Linear-Taper Digital Potentiometers _______________________________________________________________________________________ 5 STATIC SUPPLY CURRENT vs. TEMPERATURE MAX5527 toc10 TEMPERATURE (°C) SUPPLY CURRENT (nA) -15 10 35 60 85 50 100 150 200 250 300 0 -40 110 VDD = 5V VDD = 3V CS = U/D = GND STATIC SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX5527 toc11 SUPPLY VOLTAGE (V) SUPPLY CURRENT (nA) 3.0 3.5 4.0 4.5 5.0 50 100 150 200 250 300 0 2.5 5.5 CS = U/D = GND SUPPLY CURRENT vs. DIGITAL INPUT VOLTAGE MAX5527 toc12 DIGITAL INPUT VOLTAGE (V) SUPPLY...

MAX5527/MAX5528/MAX5529 One-Time Programmable, Linear-Taper Digital Potentiometers 6 _______________________________________________________________________________________ MAX5527 POWER-UP WIPER TRANSIENT MAX5527 toc17 2ìs VDD 2V/div GND GND OUTPUT W 2V/div MAX5528 POWER-UP WIPER TRANSIENT MAX5527 toc18 1ìs VDD 2V/div GND GND OUTPUT W 2V/div MAX5529 POWER-UP WIPER TRANSIENT MAX5527 toc19 2ìs VDD 2V/div GND GND OUTPUT W 2V/div TAP-TO-TAP SWITCHING TRANSIENT MAX5527 toc16 400ns U/D 2V/div GND OUTPUT W 50mV/div Typical Operating Characteristics (continued) (VDD = +5V, TA = +25°C, unless...

MAX5527/MAX5528/MAX5529 Detailed Description The MAX5527/MAX5528/MAX5529 100kÙ/50kÙ/10kÙ 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 One- Time Programming...

MAX5527/MAX5528/MAX5529 One-Time Programmable, Linear-Taper Digital Potentiometers 8 _______________________________________________________________________________________ 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 2) A newly programmed power-up position, 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...

MAX5527/MAX5528/MAX5529 One-Time Programmable, Linear-Taper Digital Potentiometers _______________________________________________________________________________________ 9 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) Set U/D and CS high. 2) Connect an external voltage source at PV in the range of +11V to +11.55V. 3) Pull CS low. 4a) Pulse CS high for six cycles, consisting of CS starting low and going high for at least tCH,...