AD73322AST Analog Devices Inc, AD73322AST Datasheet - Page 37

• Manufacturer Part Number: AD73322AST
• Description: IC ANALOG FRONT END DUAL 44-LQFP
• Manufacturer: Analog Devices Inc

Specifications of AD73322AST

• Rohs Status: RoHS non-compliant
• Number Of Bits: 16
• Number Of Channels: 4
• Power (watts): 73mW
• Voltage - Supply, Analog: 2.7 V ~ 5.5 V
• Voltage - Supply, Digital: 2.7 V ~ 5.5 V
• Package / Case: 44-LQFP

REV. B
APPENDIX A
DAC Timing Control Example
The AD73322’s DAC is loaded from the DAC register contents
just before the ADC register contents are loaded to the serial
register (SDOFS going high). This default DAC load position
can be advanced in time to occur earlier with respect to the
SDOFS going high. Figure 45 shows an example of the ADC
unload and DAC load sequence. At time t
to indicate that a new ADC word is ready. Following the SDOFS
pulse, 16 bits of ADC data are clocked out on SDO in the sub-
sequent 16 SCLK cycles finishing at time t
SPORT will have received the 16-bit word. The DSP may
process this information and generate a DAC word to be sent to
FROM DAC REGISTER
DATA REGISTER
DAC LOAD
UPDATE
SDOFS
SDIFS
SCLK
SDO
SDI
SE
t
1
1
2
the SDOFS is raised
where the DSP’s
ADC WORD
Figure 43. DAC Timing Control
t
2
–37–
the AD73322. Time t
sending the DAC word to the AD73322. This sequence ends at
time t
in the AD73322’s serial register. However, the DAC will not be
updated from the DAC register until time t
acceptable in certain applications. In order to reduce this delay
and load the DAC at time t
programmed with a suitable setting corresponding to the
required time advance (refer to Table XI for details of DAC
Timing Control settings).
4
t
3
where the DAC register will be updated from the 16 bits
DAC WORD
t
4
3
t
6
marks the beginning of the sequence of
6
, the DAC advance register can be
t
5
5
, which may not be
AD73322