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MAX145BCUA Datasheet(PDF) 6 Page - Maxim Integrated Products |
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MAX145BCUA Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 16 page +2.7V, Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) (VDD = +3.0V, VREF = 2.5V, 0.1µF at REF, fSCLK = 2.17MHz, 16 clocks/conversion cycle (108ksps), CH- = GND for MAX145, TA = +25°C, unless otherwise noted.) Pin Description External Reference Voltage Input. Sets the analog voltage range. Bypass with a 100nF capacitor close to the device. REF 5 Active-Low Chip-Select Input/Active-High Shutdown Input. Pulling CS/SHDN high puts the device into shutdown with a maximum current of 5µA. CS/SHDN 6 Serial Data Output. Data changes state at SCLK’s falling edge. High impedance when CS/SHDN is high. DOUT 7 Serial Clock Input. DOUT changes on the falling edge of SCLK. SCLK 8 Analog and Digital Ground GND 4 Analog Input: MAX144 = single-ended (CH1); MAX145 = differential (CH-) CH1 (CH-) 3 PIN Analog Input: MAX144 = single-ended (CH0); MAX145 = differential (CH+) CH0 (CH+) 2 Positive Supply Voltage, +2.7V to +5.25V VDD 1 FUNCTION NAME -0.20 -0.10 -0.15 0 -0.05 0.05 0.10 0.15 0.20 0 1024 2048 3072 4096 INTEGRAL NONLINEARITY vs. OUTPUT CODE OUTPUT CODE 0 0.1 0.2 0.3 0.4 0.5 2.5 3.5 3.0 4.0 4.5 5.0 5.5 INTEGRAL NONLINEARITY vs. SUPPLY VOLTAGE VDD (V) 0 0.1 0.2 0.3 0.4 0.5 INTEGRAL NONLINEARITY vs. TEMPERATURE TEMPERATURE (°C) -60 -10 15 -35 40 65 90 115 140 -140 -100 -120 -60 -80 -40 -20 0 20 027 54 FFT PLOT FREQUENCY (kHz) VDD = +2.7V fIN = 10kHz fSAMPLE = 108ksps 12.0 11.0 1 10 100 EFFECTIVE NUMBER OF BITS vs. FREQUENCY 11.2 FREQUENCY (kHz) 11.4 11.6 11.8 VDD = +2.7V |
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