ZHCSEE2B December 2015 – January 2023 ADS54J66
PRODUCTION DATA
The ADC has a set of internal registers that can be accessed by the serial interface formed by the SEN (serial interface enable), SCLK (serial interface clock) and SDIN (serial interface data) pins. Serially shifting bits into the device is enabled when SEN is low. Serial data on SDIN are latched at every SCLK rising edge when SEN is active (low). The interface can function with SCLK frequencies from 5 MHz down to very low speeds (of a few hertz) and also with a non-50% SCLK duty cycle.
Figure 7-24 shows timing requirements for serial interface signals.
MIN | MAX | UNIT | ||
---|---|---|---|---|
fSCLK | SCLK frequency (equal to 1 / tSCLK) | > dc | 20 | MHz |
tSLOADS | SEN to SCLK setup time | 25 | ns | |
tSLOADH | SCLK to SEN hold time | 25 | ns | |
tDSU | SDATA setup time | 25 | ns | |
tDH | SDATA hold time | 25 | ns |