19-3929; Rev 2; 6/07 KIT ATION EVALU LE B A IL A AV 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package The MAX5128 nonvolatile, single, linear-taper, digital potentiometer performs the function of a mechanical potentiometer, but replaces the mechanics with a simple 2-wire digital interface. The MAX5128 performs the same function as a discrete potentiometer or variable resistor and features 128 taps and 22kΩ end-to-end resistance. The MAX5128 also features an ultra-small, 2mm x 2mm µDFN package and low 0.5µA (typ) standby supply current, making this device ideal for portable applications. The MAX5128 operates from a +2.7V to +5.25V power supply. An integrated nonvolatile memory recalls the programmed wiper position of the digital potentiometer. A simple 2-wire up/down interface programs the wiper position. The digital potentiometer provides a low 5ppm/°C ratiometric temperature coefficient and is specified over the extended -40°C to +85°C temperature range. Features ♦ Ultra-Small, 2mm x 2mm, 8-Pin µDFN Package ♦ Power-On Recall of Wiper Position from Nonvolatile Memory ♦ 22kΩ End-to-End Resistance ♦ 128 Tap Positions ♦ 5ppm/°C Ratiometric Temperature Coefficient ♦ 1.5µA (max) Standby Supply Current ♦ +2.7V to +5.25V Single Supply Operation ♦ 80,000 Wiper Store Cycles ♦ 50-Year Wiper Data Retention Applications Ordering Information VCOM Adjustment for LCD Panels PART Backlight Adjustment TEMP RANGE LED Bias Adjustment MAX5128ELA+ -40°C to +85°C Power-Supply Modules +Denotes a lead-free package. PINTOP PACKAGE MARK PKG CODE 8 µDFN L822-1 AAF Fiber-Module Bias Setting Bias Setting for Radios Portable Consumer Electronics Functional Diagram H VCC POR 7-BIT NV MEMORY 7 GND 128-POSITION DECODER 128 TAPS W L UP DN SERIAL INTERFACE 7 MAX5128 ________________________________________________________________ Maxim Integrated Products 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. 1 MAX5128 General Description MAX5128 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................-0.3V to +6.0V UP and DN to GND ....................................-0.3V to (VCC + 0.3V) H, L, and W to GND....................................-0.3V to (VCC + 0.3V) Maximum Continuous Current into H, L, and W ..............±0.5mA Maximum Continuous Current into All Other Pins ............±50mA Continuous Power Dissipation (TA = +70°C) 8-Pin µDFN (derate 4.7mW/°C above +70°C) ........376.5mW 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 (VCC = +2.7V to +5.25V, H = VCC, L = GND, TA = -40°C to +85°C. Typical values are at VCC = +5.0V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC PERFORMANCE (voltage-divider mode) Resolution N 7 Bits Integral Nonlinearity INL (Note 2) ±1.0 LSB Differential Nonlinearity DNL (Note 2) ±1.0 LSB End-to-End Resistance Temperature Coefficient TCR Ratiometric Resistance Temperature Coefficient 50 ppm/°C 5 ppm/°C Full-Scale Error FSE -3 0 LSB Zero-Scale Error ZSE 0 +2 LSB DC PERFORMANCE (variable-resistor mode) Integral Nonlinearity INL (Note 3) ±1.75 LSB Differential Nonlinearity DNL (Note 3) ±1 LSB 0.8 kΩ 27 kΩ DC PERFORMANCE (resistor characteristics) Wiper Resistance RW Wiper Capacitance CW End-to-End Resistance RHL (Note 4) 0.6 20 16 22 pF DIGITAL INPUTS (UP, DN) Input-High Voltage (Note 5) VIH Input-Low Voltage VIL Input Leakage Current IIN Input Capacitance CIN 3.4V ≤ VCC ≤ 5.25V 2.4 2.7V ≤ VCC < 3.4V 0.7 x VCC V (Note 5) 0.8 V ±1 µA 5 pF (Note 6) 400 kHz VH = 0.3VRMS, f = 1kHz, wiper set to midscale 0.02 % DYNAMIC CHARACTERISTICS Wiper -3dB Bandwidth THD Plus Noise 2 f3dB THD+N _______________________________________________________________________________________ 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package (VCC = +2.7V to +5.25V, H = VCC, L = GND, TA = -40°C to +85°C. Typical values are at VCC = +5.0V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS NONVOLATILE MEMORY RELIABILITY Data Retention Endurance TA = +85°C 50 TA = +25°C 80,000 TA = +85°C 50,000 Years Stores POWER SUPPLY Supply Voltage VCC 2.70 Average Programming Current IPG During nonvolatile write only; digital inputs = VCC or GND 220 Peak Programming Current IPK During nonvolatile write only; digital inputs = VCC or GND 4 Standby Current ICC Digital inputs = VCC or GND, TA = +25°C 0.5 5.25 V 400 µA mA 1.5 µA TIMING CHARACTERISTICS (VCC = +2.7V to +5.25V, H = VCC, L = GND, TA = -40°C to +85°C. Typical values are at VCC = +5.0V, TA = +25°C, unless otherwise noted.) (See Figures 1, 2, 3, and 4). PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ANALOG SECTION Wiper Settling Time tS (Note 7) 500 ns DIGITAL SECTION UP or DN Pulse-Width High tPWH 80 ns UP or DN Pulse-Width Low tPWL 80 ns UP or DN Glitch Immunity tIMMU 20 ns UP Fall to DN Rise Setup or DN Fall to UP Rise Setup tMS1 80 ns Before Entering NVM-Write Mode, UP Fall to UP Rise tMS2 80 ns UP Rise to DN Rise Setup when Entering NVM-Write tWS 80 ns UP Fall to DN Fall Hold or DN Fall to UP Fall Hold during NVMWrite tWH 0 ns _______________________________________________________________________________________ 3 MAX5128 ELECTRICAL CHARACTERISTICS (continued) MAX5128 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package TIMING CHARACTERISTICS (continued) (VCC = +2.7V to +5.25V, H = VCC, L = GND, TA = -40°C to +85°C. Typical values are at VCC = +5.0V, TA = +25°C, unless otherwise noted.) (See Figures 1, 2, 3, and 4). PARAMETER SYMBOL NVM-Write Mode Pulse-Width High tWP Write NV Register Busy Time tBUSY Power-Up Settling Time tACC CONDITIONS MIN TYP MAX 80 ns 14 (Note 8) UNITS 2 ms µs Note 1: All devices are production tested at TA = +25°C and are guaranteed by design for TA = -40°C to +85°C. Note 2: The DNL and INL are measured with the potentiometer configured as a voltage-divider with H = VCC and L = GND. The wiper terminal is unloaded and measured with a high input-impedance voltmeter. Note 3: 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 200µA and for the +2.7V condition, the wiper terminal is driven with a source current of 100µA. Note 4: The wiper resistance is measured using the source currents given in Note 3. Note 5: The device draws higher supply current when the digital inputs are driven with voltages between (VCC - 0.5V) and (GND + 0.5V). See Supply Current vs. Digital Input Voltage in the Typical Operating Characteristics. Note 6: Wiper at midscale with a 10pF load, L = GND, an AC source is applied to H, and the output is measured as 3dB lower than the DC W/H value in dB. Note 7: Wiper-settling time is the worst-case 0 to 50% rise time measured between consecutive wiper positions. H = VCC, L = GND, and the wiper terminal is unloaded and measured with a 10pF oscilloscope probe. See the Tap-to-Tap Switching Transient in the Typical Operating Characteristics section. Note 8: Power-up settling time is measured from the time VCC = 2.7V to the wiper settling to 1 LSB of the final value. 4 _______________________________________________________________________________________ 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package 0.08 0.06 0.02 INL (LSB) 0.04 0.04 0.02 0.04 0.02 0 0 0 -0.02 -0.02 -0.02 -0.04 -0.04 -0.04 -0.06 -0.06 12 24 36 48 60 72 84 96 108 120 CODE VCC = 2.7V, TA = -40°C 0.006 0.010 0.008 VCC = 2.7V, TA = +25°C 0.006 DIFFERENTIAL NONLINEARITY vs. CODE (VOLTAGE-DIVIDER) 0.010 0.008 0 0.004 DNL (LSB) DNL (LSB) 0.002 0.002 0 -0.002 -0.002 0.002 0 -0.002 -0.004 -0.004 -0.004 -0.006 -0.006 -0.006 -0.008 -0.008 -0.008 -0.010 -0.010 CODE 1.5 VCC = 2.7V, TA = +25°C 1.0 1.5 VCC = 2.7V, TA = +85°C 1.0 0.5 0 0.5 INL (LSB) INL (LSB) 0.5 INL (LSB) INTEGRAL NONLINEARITY vs. CODE (VARIABLE RESISTOR) MAX5128 toc08 1.0 CODE INTEGRAL NONLINEARITY vs. CODE (VARIABLE RESISTOR) MAX5128 toc07 VCC = 2.7V, TA = -40°C 0 12 24 36 48 60 72 84 96 108 120 CODE INTEGRAL NONLINEARITY vs. CODE (VARIABLE RESISTOR) 1.5 -0.010 0 12 24 36 48 60 72 84 96 108 120 0 12 24 36 48 60 72 84 96 108 120 0 0 -0.5 -0.5 -0.5 -1.0 -1.0 -1.0 -1.5 -1.5 0 12 24 36 48 60 72 84 96 108 120 CODE VCC = 2.7V, TA = +85°C 0.006 0.004 0.004 12 24 36 48 60 72 84 96 108 120 CODE DIFFERENTIAL NONLINEARITY vs. CODE (VOLTAGE-DIVIDER) MAX5128 toc04 0.008 0 12 24 36 48 60 72 84 96 108 120 CODE DIFFERENTIAL NONLINEARITY vs. CODE (VOLTAGE-DIVIDER) 0.010 -0.06 0 MAX5128 toc05 0 VCC = 2.7V, TA = +85°C 0.10 0.06 INL (LSB) INL (LSB) 0.12 MAX5128 toc03 0.08 0.06 DNL (LSB) VCC = 2.7V, TA = +25°C 0.10 MAX5128 toc06 0.08 0.12 INTEGRAL NONLINEARITY vs. CODE (VOLTAGE-DIVIDER) MAX5128 toc09 VCC = 2.7V, TA = -40°C 0.10 MAX5128 toc01 0.12 INTEGRAL NONLINEARITY vs. CODE (VOLTAGE-DIVIDER) MAX5128 toc02 INTEGRAL NONLINEARITY vs. CODE (VOLTAGE-DIVIDER) -1.5 0 12 24 36 48 60 72 84 96 108 120 CODE 0 12 24 36 48 60 72 84 96 108 120 CODE _______________________________________________________________________________________ 5 MAX5128 Typical Operating Characteristics (VCC = +5.0V, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = +5.0V, TA = +25°C, unless otherwise noted.) DIFFERENTIAL NONLINEARITY vs. CODE (VARIABLE RESISTOR) 0.15 0.20 VCC = 2.7V, TA = +25°C 0.15 0.10 0.10 0.05 0.05 0.25 VCC = 2.7V, TA = +85°C 0.20 0.15 0 DNL (LSB) DNL (LSB) 0.10 0 -0.05 -0.05 -0.10 -0.10 -0.15 -0.15 -0.20 -0.20 0.05 0 -0.05 -0.10 -0.15 -0.20 -0.25 0 12 24 36 48 60 72 84 96 108 120 CODE RATIOMETRIC TEMPERATURE COEFFICIENT vs. CODE (VOLTAGE-DIVIDER) VCC = 2.7V TA = -40°C TO +85°C 120 TA = -40°C TO +85°C 800 VCC = 2.7V 700 600 100 80 60 40 500 400 300 200 20 100 0 0 -20 -100 12 24 36 48 60 72 84 96 108 120 0 12 24 36 48 60 72 84 96 108 120 CODE CODE END-TO-END RESISTANCE (RHL) % CHANGE vs. TEMPERATURE STANDBY SUPPLY CURRENT vs. TEMPERATURE 1.5 MAX5128 toc15 1.0 0.8 0.6 MAX5128 toc16 0 1.2 0.4 0.2 IDD (μA) END-TO-END RESISTANCE CHANGE (%) 900 TCVR (ppm/°C) RATIOMETRIC TEMPCO (ppm/°C) 140 TEMPERATURE COEFFICIENT vs. CODE (VARIABLE RESISTOR) MAX5128 toc13 160 0 -0.2 0.9 VCC = 5.25V VCC = 3.3V 0.6 -0.4 -0.6 VCC = 2.7V 0.3 -0.8 -1.0 0 -40 -15 10 35 TEMPERATURE (°C) 6 0 12 24 36 48 60 72 84 96 108 120 CODE CODE MAX5128 toc14 0 12 24 36 48 60 72 84 96 108 120 60 85 -40 -15 10 35 60 TEMPERATURE (°C) _______________________________________________________________________________________ 85 MAX5128 toc12 VCC = 2.7V, TA = -40°C MAX5128 toc10 0.20 DIFFERENTIAL NONLINEARITY vs. CODE (VARIABLE RESISTOR) MAX5128 toc11 DIFFERENTIAL NONLINEARITY vs. CODE (VARIABLE RESISTOR) DNL (LSB) MAX5128 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package VCC = 5V WIPER = MIDSCALE 800 0 VCC = 5V WIPER = MIDSCALE -2 -4 100 MAX5128 toc19 1000 MAX5128 toc18 VCC = 5V MAX5128 toc17 1000 WIPER RESPONSE vs. FREQUENCY WIPER RESISTANCE vs. TEMPERATURE SUPPLY CURRENT vs. DIGITAL INPUT VOLTAGE GAIN (dB) RW (Ω) 10 400 -8 -10 -12 1 -14 200 -16 -18 0 0.1 -40 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 -15 10 35 60 0.1 85 1 THD+N vs. FREQUENCY 10 100 1000 FREQUENCY (kHz) TEMPERATURE (°C) DIGITAL INPUT VOLTAGE (V) TAP-TO-TAP SWITCHING TRANSIENT MAX5128 toc21 MAX5128 toc20 10 VCC = 5V WIPER = MIDSCALE FILTER BANDWIDTH = 80kHz 1 THD+N (%) UP 2V/div 0.1 0.01 H = VCC L = GND FROM MIDSCALE CW = 20pF 0.001 0.0001 0.1 1 10 100 VW 20mV/div AC-COUPLED 1μs/div FREQUENCY (kHz) MIDSCALE WIPER TRANSIENT AT POWER-ON WIPER RESISTANCE vs. CODE MAX5128 toc23 600 MAX5128 toc22 0 500 VCC 2V/div 400 RW (Ω) IDD (μA) -6 600 300 OUTPUT W 2V/div 200 100 0 0 12 24 36 48 60 72 84 96 108 120 10μs/div CODE _______________________________________________________________________________________ 7 MAX5128 Typical Operating Characteristics (continued) (VCC = +5.0V, TA = +25°C, unless otherwise noted.) 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package MAX5128 Pin Description PIN NAME FUNCTION 1 VCC Power Supply. Bypass VCC with a 0.1µF capacitor to GND as close to the device as possible. For proper operation, limit the supply voltage slew rate to ≥ 10µs. 2 H High Terminal. The voltage at H can be higher than or lower than the voltage at L. Current can flow into or out of H. 3 W Wiper Terminal 4 L Low Terminal. The voltage at L can be higher than or lower than the voltage at H. Current can flow into or out of L. 5 GND 6 DN Down Input 7 UP Up Input 8 N.C. tPWH Ground No Connection. Not internally connected. NVM WRITE tPWL tMS1 UP tPWL tPWH tWP DN tMS1 tWH tWS Figure 1. Digital-Interface Timing Diagram Detailed Description The MAX5128 nonvolatile, single, linear-taper, digital potentiometer performs the function of a mechanical potentiometer or variable resistor, but replaces the mechanics with a simple 2-wire digital interface. This device features 128 taps and 22kΩ end-to-end resistance with a 5ppm/°C ratiometric temperature coefficient. The MAX5128 operates from a +2.7V to +5.25V power supply and consumes only 0.5µA (typ) of standby supply current. The MAX5128 includes an integrated nonvolatile memory that recalls the stored wiper position of the digital potentiometer. A simple 2-wire up/down interface programs the wiper positions. 8 Analog Circuitry The MAX5128 consists of a resistor array with 127 resistive elements; 128 tap points along the resistor string between H and L are accessible to the wiper, W. Select the wiper tap point by programming the potentiometer through the 2-wire (UP, DN) interface. The MAX5128 features power-on reset circuitry that loads the wiper position from the nonvolatile memory at power-up. The nonvolatile memory is programmed to midscale at the factory. _______________________________________________________________________________________ 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package NVM WRITE t MS2 t PWL MAX5128 t PWH t BUSY UP t WP DN t WS t WH Figure 2. Digital-Interface Timing Diagram with tBUSY tBUSY tBUSY UP DN WIPER INCREMENTS WIPER DECREMENTS NVM WRITE NVM WRITE WIPER INCREMENTS WIPER DECREMENTS Figure 3. Digital-Interface Command Diagram Digital Interface The MAX5128 features a 2-wire interface consisting of two logic inputs (UP and DN). Logic inputs UP and DN control the wiper position and program the position to the nonvolatile memory. Transition UP from high to low with DN low to increment the wiper position. Transition DN from high to low with UP low to decrement the wiper position (see Figures 1, 2, and 3). When the wiper decrements, it decreases the resistance between W and L (and it increases the resistance between H and W). To program the nonvolatile memory, force UP high, then force DN high, and then transition either input (UP/DN) from high to low (see Figure 3). The wiper performs a make-before-break transition, ensuring that an open circuit during a transition from one resistor tap to another does not occur. The wiper does not wrap around when it reaches either end of the resistor array (max/min). Additional transition com- mands in the direction of the end point do not change the tap position. The logic inputs also feature pulse glitch immunity (20ns) to protect the wiper from transitioning due to glitches (see Figure 4). Write NV Register The internal EEPROM consists of a 7-bit nonvolatile memory that retains the value written to it even after power-down. To program the nonvolatile memory, force UP high, then force DN high, and then transition either input (UP/DN) from high to low. A nonvolatile write requires a busy time of 14ms (max). During the busy time, any nonvolatile write requests are ignored as well as requests to increment or decrement the wiper position. Upon power-up, the wiper returns to the position stored in the nonvolatile register. The MAX5128 features a factory-default wiper position of midscale. _______________________________________________________________________________________ 9 MAX5128 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package tIMMU tIMMU UP DN tIMMU tIMMU PULSES WITH WIDTHS LESS THAN tIMMU ARE IGNORED. Figure 4. Glitch-Immunity Timing Diagram Standby Mode DC-DC Converter Applications The MAX5128 operates in standby mode while the serial interface is inactive. Programming the MAX5128 increases the average operating current to 400µA (max). When in standby mode, the static supply current reduces to less than 0.5µA (typ). Figures 6 and 7 show two applications using the MAX5128 to adjust the output voltage of a DC-DC converter. Figure 6 shows the MAX5128 in the grounded potentiometer configuration. Figure 7 shows the MAX5128 in a floating potentiometer configuration. The grounded potentiometer configuration forces the output voltage range of the DC-DC converter to fall within the supply voltage range of the MAX5128. Use the floating potentiometer configuration to allow the DC-DC converter’s output to exceed the supply voltage range of the MAX5128. The floating potentiometer configuration increases the output voltage range and increases the precision of the output voltage adjustment range. Power-Up Upon power-up, the MAX5128 updates the wiper position with the data stored in the nonvolatile memory. This initialization period takes 2µs (typ). For proper operation, limit the supply voltage slew rate to ≥ 10µs. Applications Information Use the MAX5128 for applications requiring digitally controlled adjustable resistance or voltage, such as LCD contrast control (where voltage biasing adjusts the display contrast), or DC-DC converters with adjustable outputs. The 22kΩ end-to-end resistance is divided into 128 tap points of 172Ω each. Use the MAX5128 in a voltage-divider or variable-resistor configuration. VCOM Generator Figure 5 shows an application using the MAX4238 and the MAX5128 to generate the VCOM voltage for a LCD panel. Adjusting the resistor value of the MAX5128 changes the VCOM voltage. Adjusting the VCOM voltage changes the contrast for the LCD panel. 10 LED Bias Adjustment Figure 8 shows a LED bias adjustment application using a MAX5128 to set the current of the LEDs that the MAX1574 drives. Use the MAX5128 for an adjustable LED current drive of 10mA to 60mA. Chip Information PROCESS: BiCMOS ______________________________________________________________________________________ 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package MAX5128 +3.3V 15kΩ 120kΩ +5V H 0.1μF TIMING-CONTROL-IC OUTPUT SIGNAL MAX5128 W 10kΩ MAX4238 +3.3V 22kΩ L VCOM 51kΩ 27kΩ 36kΩ 0.1μF Figure 5. VCOM Generator Circuit for LCD Panels VOUT = 2V TO 5.25V OUT LX H MAX1722 VIN = 0.8V TO VOUT FB W BATT MAX5128 GND L Figure 6. DC-DC Converter Using a Grounded Potentiometer ______________________________________________________________________________________ 11 MAX5128 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package SW VOUT = VCC TO 28V LX H MAX8574 VCC = 2.7V TO 5.5V VCC FB SHDN W MAX5128 L GND Figure 7. DC-DC Converter Using a Floating Potentiometer Pin Configuration CN VIN = 2.7V TO 5.5V IN TOP VIEW CP OUT N.C. UP DN GND 8 7 6 5 MAX1574 LED1 MAX5128 H W MAX5128 LED2 SET LED3 L 1 2 3 4 VCC H W L 2mm x 2mm μDFN GND Figure 8. LED Bias Adjustment Using the MAX5128 12 ______________________________________________________________________________________ 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package XXXX XXXX XXXX b e N SOLDER MASK COVERAGE E PIN 1 0.10x45∞ L PIN 1 INDEX AREA 6, 8, 10L UDFN.EPS A D L1 1 SAMPLE MARKING A A (N/2 -1) x e) 7 CL b L A A2 A1 CL L e EVEN TERMINAL e ODD TERMINAL PACKAGE OUTLINE, 6, 8, 10L uDFN, 2x2x0.80 mm -DRAWING NOT TO SCALE- 21-0164 A 1 2 ______________________________________________________________________________________ 13 MAX5128 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) MAX5128 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) COMMON DIMENSIONS SYMBOL MIN. NOM. A 0.70 0.75 0.80 A1 0.15 0.20 0.25 0.035 A2 0.020 0.025 D 1.95 2.00 E 1.95 2.00 L 0.30 0.40 L1 MAX. - 2.05 2.05 0.50 0.10 REF. PACKAGE VARIATIONS PKG. CODE N e b (N/2 -1) x e L622-1 6 0.65 BSC 0.30±0.05 1.30 REF. L822-1 8 0.50 BSC 0.25±0.05 1.50 REF. L1022-1 10 0.40 BSC 0.20±0.03 1.60 REF. PACKAGE OUTLINE, 6, 8, 10L uDFN, 2x2x0.80 mm 21-0164 -DRAWING NOT TO SCALE- A 2 2 Revision History Pages changed at Rev 1: 1, 9, 10, 13 Pages changed at Rev 2: 1, 9–14 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products Boblet is a registered trademark of Maxim Integrated Products, Inc.