MAX538 Maxim Integrated Products, MAX538 Datasheet
MAX538
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MAX538 Summary of contents
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... All parts have been trimmed for offset voltage, gain, and linearity further adjustment is necessary. The MAX538’s buffer is fixed at a gain of +1 and the MAX539’s buffer at a gain of +2. The MAX531’s internal op amp may be configured for a gain +2, as well as for unipolar or bipolar output voltages ...
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... MIN MAX CONDITIONS MAX53_AC/E MAX53_BC/E Guaranteed monotonic MAX53_ _C/E OS MAX53_ _C/E 4.5V ≤ V ≤ 5.5V DD MAX531 (G = +1), MAX538 MAX531 (G = +2), MAX539 VOUT = 2V 2kΩ L Code dependent, minimum at code 555 hex Code dependent (Note 4) REFIN = 1kHz, 2Vp-p = +70° 33µF REFOUT MIN ...
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... 2mA SOURCE 2mA OL SINK +25° ±1/2LSB, VOUT = DIN = 100kHz DD REFIN = 1kHz, 2Vp +2), code = FFF hex V DD MAX531 All inputs = output = no load MAX538, MAX539 t CSS t CSH0 t CSH1 50pF CSW t CLR t CS1 Serial 12-Bit DACs REFOUT MIN TYP MAX 2.024 2.048 2.072 2.017 2 ...
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Low-Power, Voltage-Output, Serial 12-Bit DACs ELECTRICAL CHARACTERISTICS—Dual Supplies (MAX531 Only +5V ±10 -5V ±10%, AGND = DGND = 0V, REFIN = 2.048V (external), RFB = BIPOFF = VOUT 10kΩ, C ...
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ELECTRICAL CHARACTERISTICS—Dual Supplies (MAX531 Only) (continued +5V ±10 -5V ±10%, AGND = DGND = 0V, REFIN = 2.048V (external), RFB = BIPOFF = VOUT 10kΩ 100pF ...
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... OUTPUT PULL-UP VOLTAGE (V) SUPPLY CURRENT vs. TEMPERATURE 300 280 260 MAX531 240 220 200 180 160 MAX538/MAX539 140 120 -60 -40 - 100 TEMPERATURE ( C) 6 _______________________________________________________________________________________ INTEGRAL NONLINEARITY vs. DIGITAL INPUT CODE (ALL CODES) 0.25 0 -0.25 0 512 1024 1536 2048 2560 3072 3584 4095 DIGITAL INPUT CODE (DECIMAL) ANALOG FEEDTHROUGH vs ...
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Operating Characteristics (continued +5V 2.048V +25°C, unless otherwise noted.) DD REFIN A MAX531 GAIN AND PHASE vs. FREQUENCY 20 RFB CONNECTED TO AGND (G=2) RFB CONNECTED TO VOUT (G=1) 10 GAIN 0 -10 ...
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... DOUT Figure 1. Timing Diagram 8 _______________________________________________________________________________________ _______________Detailed Description The MAX531/MAX538/MAX539 use an “inverted” R-2R FUNCTION ladder network with a single-supply CMOS op amp to con- vert 12-bit digital data to analog voltage levels (see Functional Diagram) . The term “inverted” describes the ladder network because the REFIN pin in current-output DACs is the summing junction, or virtual ground amp ...
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... DD internal reference). External Reference An external reference in the range (V may be used with the MAX531 in dual-supply operation. With the MAX538/MAX539 or the MAX531 in single-supply use, the reference must be positive and may not exceed V - 2V. The reference voltage determines the DAC’s full- DD scale output. The DAC input resistance is code dependent and is minimum (40kΩ ...
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... BIPOFF and RFB to VOUT (Figure 6). The converter operates from either sin- gle or dual supplies in this configuration. See Table 1 for the DAC-latch contents (input) vs. the analog VOUT (output). In this range, 1LSB = V MAX538 is internally configured for unipolar gain = +1 operation. A gain unipolar output) is set up REFIN by connecting BIPOFF to AGND and RFB to VOUT (Figure 7) ...
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... REFIN 1000 4096 2047 (V ) 0111 REFIN 4096 REFIN 0000 4096 OV 0000 Serial 12-Bit DACs SCLK SCK MAX531 DIN MOSI PORT MAX538 MAX539 CS I/O DOUT MISO CPOL = 0, CPHA = 0 + REFIN REFOUT 33µF MAX531 BIPOFF RFB AGND VOUT DGND -5V Output), Gain = +2 REFIN INPUT ...
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... Additionally, the output buffer amplifier exhibits a nonlinearity near-zero output when operating with a single supply. To account for this nonlinearity in the MAX531/MAX538/MAX539, linearity and gain error are measured from code 11 to code 4095. The output buffer’s offset and nonlinear behavior do not affect monotonicity, and these DACs are guaranteed monotonic starting with code zero ...
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... CS high, setting the DAC code to all 0s, and sweeping REFIN. ______________________________________________________________________________________ +5V, Low-Power, Voltage-Output, REFOUT VOUT 2R RFB 2R BIPOFF Figure 10. Single-Supply Offset Digital Feedthrough Analog Feedthrough Figure 11. Power-Supply Bypassing Serial 12-Bit DACs POSITIVE OFFSET 4 NEGATIVE OFFSET DAC CODE (LSB) ANALOG GROUND PLANE 0 0 (a) MAX531 BYPASSING 0 (b) MAX538/MAX539 BYPASSING 13 ...
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... Plastic DIP MAX538ACSA 0°C to +70° MAX538BCSA 0°C to +70° MAX538BC/D 0°C to +70°C Dice* MAX538AEPA -40°C to +85°C 8 Plastic DIP MAX538BEPA -40°C to +85°C 8 Plastic DIP MAX538AESA -40°C to +85° MAX538BESA -40°C to +85° MAX539ACPA 0°C to +70°C 8 Plastic DIP MAX539BCPA 0° ...
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Information ______________________________________________________________________________________ +5V, Low-Power, Voltage-Output, Serial 12-Bit DACs 15 ...
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... 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. 16 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...