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MAX1257 Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX1257 Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 43 page 12-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports _______________________________________________________________________________________ 7 ELECTRICAL CHARACTERISTICS (continued) (VAVDD = VDVDD = 2.7V to 3.6V (MAX1257), external reference VREF = 2.5V (MAX1257), VAVDD = 4.75V to 5.25V, VDVDD = 2.7V to VAVDD (MAX1220/MAX1258), external reference VREF = 4.096V (MAX1220/MAX1258), fCLK = 3.6MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at VAVDD = VDVDD = 3V (MAX1257), VAVDD = VDVDD = 5V (MAX1220/MAX1258), TA = +25°C. Outputs are unloaded, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS TIMING CHARACTERISTICS (Figures 6–13) SCLK Clock Period tCP 40 ns SCLK Pulse-Width High tCH 40/60 duty cycle 16 ns SCLK Pulse-Width Low tCL 60/40 duty cycle 16 ns GPIO Output Rise/Fall After CS Rise tGOD CLOAD = 20pF 100 ns GPIO Input Setup Before CS Fall tGSU 0 ns LDAC Pulse Width tLDACPWL 20 ns CLOAD = 20pF, SLOW = 0 1.8 12.0 SCLK Fall to DOUT Transition (Note 16) tDOT CLOAD = 20pF, SLOW = 1 10 40 ns CLOAD = 20pF, SLOW = 0 1.8 12.0 SCLK Rise to DOUT Transition (Notes 16, 17) tDOT CLOAD = 20pF, SLOW = 1 10 40 ns CS Fall to SCLK Fall Setup Time tCSS 10 ns SCLK Fall to CS Rise Hold Time tCSH 0 2000 ns DIN to SCLK Fall Setup Time tDS 10 ns DIN to SCLK Fall Hold Time tDH 0 ns CS Pulse-Width High tCSPWH 50 ns CS Rise to DOUT Disable tDOD CLOAD = 20pF 25 ns CS Fall to DOUT Enable tDOE CLOAD = 20pF 1.5 25.0 ns EOC Fall to CS Fall tRDS 30 ns CKSEL = 01 (temp sense) or CKSEL = 10 (temp sense), internal reference on (Note 18) 65 CKSEL = 01 (temp sense) or CKSEL = 10 (temp sense), internal reference initially off 140 CKSEL = 01 (voltage conversion) 9 CKSEL = 10 (voltage conversion), internal reference on (Note 18) 9 CS or CNVST Rise to EOC Fall—Internally Clocked Conversion Time tDOV CKSEL = 10 (voltage conversion), internal reference initially off 80 µs CKSEL = 00, CKSEL = 01 (temp sense) 40 ns CNVST Pulse Width tCSW CKSEL = 01 (voltage conversion) 1.4 µs |
Similar Part No. - MAX1257 |
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Similar Description - MAX1257 |
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