MAX5436MAX5439 19-2657 Rev 3 9/04 15V, 128-Tap, Low-Drift Digital Potentiometers General Description Features The MAX5436MAX5439 are 128-tap high-voltage (5V +10V to +30V Single-Supply Operation to 15V) digital potentiometers in packages that are half -28V to -10V Single Negative Supply Operation the size of comparable devices in 8-pin SO. They perform the same function as mechanical potentiometers, but 5V to 15V Dual-Supply Operation replace the mechanics with a simple digital interface. The 128 Tap Positions digital logic is powered by a separate single +2.7V to +5.25V supply voltage (V ). The resistor string uses its CC Uncommitted High-Voltage Amplifier own analog supplies (V and V ) that require DD SS (MAX5437/MAX5439) V - V to be greater than 9V and less than 31.5V. This DD SS Low Temperature Coefficient allows for greater flexibility in voltage ranges that can be used with these devices. Examples of analog supply 35ppm/C (End-to-End) ranges include not only dual voltages of 5V to 15V, but 5ppm/C (Ratiometric) single-supply voltages, such as +10V, +15V, +30V, -30V, Small-Footprint Packages and more, as long as the ranges of V - V and V - DD SS CC 10-Pin MAX (MAX5436/MAX5438) V are met. SS 14-Pin TSSOP (MAX5437/MAX5439) The MAX5437/MAX5439 include an on-chip, high- Glitchless Switching Between the Resistor Taps voltage, uncommitted amplifier, providing additional reductions in board space and cost. Other features 3-Wire SPI/QSPI/MICROWIRE-Compatible Serial include low 35ppm/C end-to-end and 5ppm/C ratio- Interface metric resistor temperature coefficients, a 3-wire SPI/ QSPI/MICROWIRE-compatible serial interface, and 50k/100k End-to-End Resistances a power-on reset to midscale. Power-On Reset: Wiper Goes to Midscale The MAX5436/MAX5438 are available in 10-pin MAX (Position 64) packages. The MAX5437/MAX5439 are available in 14- Ordering Information pin TSSOP package. Each device is guaranteed over the extended temperature range of -40C to +85C. PIN- RESISTANCE PART TEMP RANGE PACKAGE (k) MAX5436EUB -40C to +85C 10 MAX 50 MAX5437EUD -40C to +85C 14 TSSOP 50 Applications MAX5438EUB -40C to +85C 10 MAX 100 LCD Screen Contrast Adjustment MAX5439EUD -40C to +85C 14 TSSOP 100 Data-Acquisition Systems Mechanical Potentiometer Replacement Pin Configurations Low-Drift Programmable Gain Amplifier Audio Volume Control TOP VIEW V SCLK 1 14 SCLK 1 10 V CC CC 2 13 DIN 2 9 L DIN L MAX5436 CS 3 12 W CS 3 8 W MAX5438 SHDN 4 MAX5437 11 H GND 4 7 H MAX5439 V 5 6 V GND 5 10 V SS DD DD V 6 9 IN+ SS MAX OUT 7 8 IN- SPI/QSPI are trademarks of Motorola, Inc. TSSOP MICROWIRE is a trademark of National Semiconductor Corp. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.15V, 128-Tap, Low-Drift Digital Potentiometers ABSOLUTE MAXIMUM RATINGS V to GND, V = GND........................................-0.3V to +34V Continuous Power Dissipation (T = +70C) DD SS A V to GND, V = GND........................................-34V to +0.3V 10-Pin MAX (derate 6.94mW/C above +70C) .........556mW SS DD V to V ..............................................................-0.3V to +34V 14-Pin TSSOP (derate 9.1mW/C above +70C) .........727mW DD SS V to V ........................................................-6.3V to +28.75V Operating Temperature Range ...........................-40C to +85C DD CC V to V ..............................................................-0.3V to +34V Junction Temperature......................................................+150C CC SS V to GND..............................................................-0.3V to +6V Storage Temperature Range .............................-65C to +150C CC DIN, SCLK, CS, SHDN ...............................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C CC H, L, W, IN+, IN-, OUT .....................(V - 0.3V) to (V + 0.3V) SS DD Maximum Continuous Current into H, L, and W MAX5436MAX5439.......................................................1mA 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 = +15V, V = -15V, V = +5V, V = V , V = V , T = -40C to +85C, unless otherwise noted. Typical values are at DD SS CC H DD L SS A T = +25C, unless otherwise noted.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC PERFORMANCE (voltage-divider mode) N Resolution 2 128 Taps Integral Nonlinearity INL (Note 1) 1 LSB Differential Nonlinearity DNL (Note 1) 1 LSB End-to-End Resistor Tempco TC 35 ppm/C R Ratiometric Resistor Tempco 5 ppm/C Full-Scale Error R = 50k (MAX5436/MAX5437) -0.3 LSB HL Zero-Scale Error R = 50k (MAX5436/MAX5437) +0.3 LSB HL Full-Scale Error R = 100k (MAX5438/MAX5439) -0.15 LSB HL Zero-Scale Error R = 100k (MAX5438/MAX5439) +0.15 LSB HL DC PERFORMANCE (variable-resistor mode) N Resolution 2 128 Taps Integral Nonlinearity INL (Note 2) 1 LSB Differential Nonlinearity DNL (Note 2) 1 LSB DC PERFORMANCE (resistor characteristics) Wiper Resistance W (Note 3) 0.9 2 k R Wiper Capacitance W Midscale 6 pF C MAX5438/MAX5439 75 100 125 End-to-End Resistance R k HL MAX5436/MAX5437 37.5 50 62.5 DIGITAL INPUTS Input High Voltage V = 4.75V to 5.25V (Note 4) 2.4 V CC Input Low Voltage V = 4.75V to 5.25V 0.8 V CC 2 MAX5436MAX5439