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MAX1240BCSA+ Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX1240BCSA+ Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 15 page VDD = 3.6V +2.7V, Low-Power, 12-Bit Serial ADCs in 8-Pin SO 4 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS (continued) (VDD = +2.7V to +3.6V (MAX1240); VDD = +2.7V to +5.25V (MAX1241); 73ksps, fSCLK = 2.1MHz (50% duty cycle); MAX1240—4.7µF capacitor at REF pin, MAX1241—external reference; VREF = 2.500V applied to REF pin; TA = TMIN to TMAX; unless otherwise noted.) Note 1: Tested at VDD = +2.7V. Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range and offset have been calibrated. Note 3: MAX1240—internal reference, offset nulled; MAX1241—external reference (VREF = +2.500V), offset nulled. Note 4: External load should not change during conversion for specified accuracy. Note 5: Guaranteed by design. Not subject to production testing. Note 6: Measured as [VFS(2.7V) - VFS(VDD(MAX)]. Note 7: To guarantee acquisition time, tACQ is the maximum time the device takes to acquire the signal, and is also the minimum time needed for the signal to be acquired. SCLK Pulse Width Low tCL 200 ns SCLK Pulse Width High tCH 200 ns SCLK Clock Frequency fSCLK 0 2.1 MHz CS Rise to Output Disable tTR 240 ns SCLK Low to CS Fall Setup Time tCS0 50 ns DOUT Rise to SCLK Rise (Note 5) tSTR 0 ns CS Pulse Width tCS 240 ns Figure 2, CLOAD = 50pF CS Fall to Output Enable tDV 240 ns Figure 1, CLOAD = 50pF PARAMETERS SYMBOL MIN TYP MAX UNITS CONDITIONS Acquisition Time tACQ 1.5 µs CS = VDD (Note 6) TIMING CHARACTERISTICS (Figure 8) (VDD = +2.7V to +3.6V (MAX1240); VDD = +2.7V to +5.25V (MAX1241); TA = TMIN to TMAX, unless otherwise noted.) PARAMETERS SYMBOL MIN TYP MAX UNITS CONDITIONS 2.7 3.6 MAX1240 2.7 5.25 MAX1241 VDD Supply Voltage V ±0.3 (Note 5) PSR Supply Rejection mV 20 240 SCLK Fall to Output Data Valid tDO 20 200 ns Figure 1, CLOAD = 50pF MAX124_ _C/E MAX124_ _M 1.4 2.0 Operating mode 1.6 2.5 VDD = 3.6V 3.5 15 VDD = 5.25V VDD = 3.6V VDD = 5.25V IDD 1.9 10 Power-down, digital inputs at 0V or VDD 1.4 3.5 µA 0.9 1.5 VDD = 3.6V MAX1240C MAX1241A/B Supply Current MAX1240A/B mA 1.6 3.8 VDD = 3.6V VDD = 5.25V 0.9 2.8 MAX1241C POWER REQUIREMENTS |
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