米6体育平台手机版

ZHCSIU4A September 2018 – August 2019 ADS1284

PRODUCTION DATA.

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机械数据 (封装 | 引脚)

RHF|24
- MPQF137H

散热焊盘机械数据 (封装 | 引脚)

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8.4.4 Power-Down (PWDN Pin and STANDBY Command)

Power-down the ADS1284 in two ways: take the PWDN pin low, or send a STANDBY command. When the PWDN pin is pulled low, the internal circuitry is disabled to minimize power and the contents of the register settings are reset.

When in the power-down state, the device outputs remain active and the device inputs must not float. When the STANDBY command is sent, the SPI port and the configuration registers are kept active. Figure 56 and Table 17 show the timing. Standby mode is cancelled when CS is taken high.

Figure 56. PWDN Pin and Wake-Up Command Timing
(Table 17 shows t_DR)

Table 17. Power-On, PWDN Pin, and Wake-Up Command Timing for New Data

PARAMETER			FILTER MODE
t_DR	Time for data ready 2¹⁶ CLK cycles after power-on; and new data ready after PWDN pin or WAKEUP command	See Table 15	SINC⁽¹⁾
t_DR		62.98046875 / f_DATA + 468 / f_CLK⁽²⁾	FIR

(1) Supply power-on and PWDN pin default is 1000 SPS FIR.

(2) Subtract two CLK cycles for the WAKEUP command. The WAKEUP command is timed from the next rising edge of CLK to after the eighth rising edge of SCLK during command to DRDY falling.