Datasheet

ADS7924
SBAS482A –JANUARY 2010–REVISED MAY 2010 www.ti.com
ACQCONFIG: Acquire Configuration Register (Address = 14h)
7 6 5 4 3 2 1 0
0 0 0 ACQTIME4 ACQTIME3 ACQTIME2 ACQTIME1 ACQTIME0
Bits[7:5] Always write '0'
Bits[4:0] ACQTIME[4:0]: Signal acquire time
These bits set the time to acquire the signal before a conversion (default = 0).
t
ACQ
= ACQTIME[4:0] × 2ms + 6µs
PWRCONFIG: Power-Up Configuration Register (Address = 15h)
7 6 5 4 3 2 1 0
CALCNTL PWRCONPOL PWRCONEN PWRUPTIME4 PWRUPTIME3 PWRUPTIME2 PWRUPTIME1 PWRUPTIME0
Bit 7 CALCNTL: Calibration control
0 = Setting CH3 in the Mode Control register selects the CH3 input to be routed to the MUXOUT pin. (default)
1 = Setting CH3 in the Mode Control register connects the MUXOUT pin to AGND.
Bit 6 PWRCONPOL: PWRCON pin polarity
0 = Active low (default)
1 = Active high
Bit 5 PWRCONEN: PWRCON enable
0 = The PWRCON pin is disabled (default)
1 = The PWRCON pin is always enabled
Bits[4:0] PWRUPTIME[4:0]: Power-up time setting
These bits set the power-up time (default = 0).
t
PWR
= PWRUPTIME[4:0] × 2ms.
RESET: Software Reset and Device ID Register (Address = 16h)
7 6 5 4 3 2 1 0
RST/ID7 RST/ID6 RST/ID5 RST/ID4 RST/ID3 RST/ID2 RST/ID1 RST/ID0
A read of this register returns the device ID when A0 determines the last bit of the device ID (0001100A0).
A write to this register of 10101010 generates a software reset of the ADS7924.
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