AD5933YRSZ Datasheet, PDF (23/40 Pages) Analog Devices – 1 MSPS, 12-Bit Impedance Converter, Network Analyzer

Data Sheet
REGISTER MAP
Table 8.
Register
0x80
0x81
0x82
0x83
0x84
0x85
0x86
0x87
0x88
0x89
0x8A
0x8B
0x8F
0x92
0x93
0x94
0x95
0x96
0x97
Name
Control
Start frequency
Frequency increment
Number of increments
Number of settling time cycles
Status
Temperature data
Real data
Imaginary data
CONTROL REGISTER (REGISTER ADDRESS 0x80,
REGISTER ADDRESS 0x81)
The AD5933 has a 16-bit control register (Register Address 0x80
and Register Address 0x81) that sets the AD5933 control
modes. The default value of the control register upon reset is
as follows: D15 to D0 reset to 0xA000 upon power-up.
The four MSBs of the control register are decoded to provide
control functions, such as performing a frequency sweep,
powering down the part, and controlling various other
functions defined in the control register map.
The user may choose to write only to Register Address 0x80 and
not to alter the contents of Register Address 0x81. Note that the
control register should not be written to as part of a block write
command. The control register also allows the user to program
the excitation voltage and set the system clock. A reset command
to the control register does not reset any programmed values
associated with the sweep (that is, start frequency, number of
increments, frequency increment). After a reset command, an
initialize with start frequency command must be issued to the
control register to restart the frequency sweep sequence (see
Figure 28).
AD5933
Register Data
D15 to D8
D7 to D0
D23 to D16
D15 to D8
D7 to D0
D23 to D16
D15 to D8
D7 to D0
D15 to D8
D7 to D0
D15 to D8
D7 to D0
D7 to D0
D15 to D8
D7 to D0
D15 to D8
D7 to D0
D15 to D8
D7 to D0
Function
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read only
Read only
Read only
Read only
Read only
Read only
Read only
Table 9. Control Register Map (D15 to D12)
D15 D14 D13 D12 Function
0
0
0
0
No operation
0
0
0
1
Initialize with start frequency
0
0
1
0
Start frequency sweep
0
0
1
1
Increment frequency
0
1
0
0
Repeat frequency
1
0
0
0
No operation
1
0
0
1
Measure temperature
1
0
1
0
Power-down mode
1
0
1
1
Standby mode
1
1
0
0
No operation
1
1
0
1
No operation
Table 10. Control Register Map (D10 to D9)
D10 D9 Range No.
Output Voltage Range
0
0
1
2.0 V p-p typical
0
1
4
200 mV p-p typical
1
0
3
400 mV p-p typical
1
1
2
1.0 V p-p typical
Rev. E | Page 23 of 40