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AD4684 Datasheet(PDF) 5 Page - Analog Devices |
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AD4684 Datasheet(HTML) 5 Page - Analog Devices |
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5 / 32 page  Data Sheet AD4684/AD4685 SPECIFICATIONS analog.com Rev. 0 | 5 of 32 TIMING SPECIFICATIONS VCC = 3.0 V to 3.6 V, VLOGIC = 1.65 V to 3.6 V, VREF = 2.5 V internal, and TA = −40°C to +125°C, unless otherwise noted. All specifications include a 10 pF load. Table 2. Timing Specifications Parameter Min Typ Max Unit Description tCYC Time between conversions 1 µs AD4684 2 µs AD4685 2 µs AD4684 alternating conversion channels 4 µs AD4685 alternating conversion channels tSCLKED 0.8 ns CS falling edge to first SCLK falling edge tSCLK 25 ns SCLK period tSCLKH 10 ns SCLK high time tSCLKL 10 ns SCLK low time tCSH 10 ns CS pulse width tQUIET 10 ns Interface quiet time prior to conversion tSDOEN CS low to SDOA and SDOB/ALERT enabled 6 ns VLOGIC ≥ 2.25 V 8 ns 1.65 V ≤ VLOGIC < 2.3 V tSDOH 2 ns SCLK rising edge to SDOA and SDOB/ALERT hold time tSDOS SCLK rising edge to SDOA and SDOB/ALERT setup time 6 ns VLOGIC ≥ 2.25 V 8 ns 1.65 V ≤ VLOGIC < 2.3 V tSDOT 8 ns CS rising edge to SDOA and SDOB/ALERT high impedance tSDIS 1 ns SDI setup time prior to SCLK falling edge tSDIH 1 ns SDI hold time after SCLK falling edge tSCLKCS 0 ns SCLK rising edge to CS rising edge tCONVERT 190 ns Conversion time tRESET Valid time to start conversion after software reset (see Figure 41) 250 ns Valid time to start conversion after soft reset 800 ns Valid time to start conversion after hard reset tACQUIRE Acquire time 850/1700 ns AD4684 single channel/alternating channel 1850/3700 ns AD4685 single channel/alternating channel tPOWERUP Supply active to conversion 5 ms First conversion allowed 11 ms Settled to within 1% with internal reference 5 ms Settled to within 1% with external reference tREGWRITE 5 ms Supply active to register read write access allowed tSTARTUP Exiting power-down mode to conversion (see Figure 40) 11 ms Settled to within 1% with internal reference 10 µs Settled to within 1% with external reference tALERTS 200 ns Time from CS to ALERT indication (see Figure 39) tALERTC 12 ns Time from CS to ALERT clear (see Figure 39) |
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