ad5933 Analog Devices, Inc., ad5933 Datasheet - Page 13

• Manufacturer Part Number: ad5933
• Description: 1 Msps 12-bit Impedance Converter, Network Analyzer
• Manufacturer: Analog Devices, Inc.

Preliminary Technical Data
CONTROL REGISTER
The AD5933 contains a 16 bit control register (address 80h and
81h) that set the AD5933 control modes. The five MSB’s of the
control register are decoded to provide control functions for
frequency sweep, power down and various other control
functions, defined in Table below. The other command
functions of the control register are explained on the following
pages.
Table 6. Control Register Map
Bit
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
D15
0
0
0
0
0
0
0
0
0
D14
0
0
0
0
0
1
1
1
1
D13
0
0
0
0
1
0
0
0
0
D9
0
0
1
1
D3
0
0
1
1
0
0
D12
0
0
1
1
0
0
0
1
1
D8
0
1
0
1
D2
0
1
0
1
D11
0
1
0
1
0
0
1
0
1
Rev. PrA | Page 13 of 20
FREQUENCY SWEEP
No Operation/ Exit Fuse Blow Mode
Initialize Sensor with Start Frequency
Start Frequency Sweep
Increment Frequency
Repeat Frequency
Reserved.
Measure Temperature
Power Down
Standby Mode
External Calibration Mode = “1”
Output Voltage
No Divide.
Divide by 10
Divide by 5
Divide by 2
Post Gain
Error Checking Enable = “1”; Disable=”0”
Reserved. Set to “0”
RESET
System Clock
Internal Oscillator
Reserved.
External Oscillator
PLL
RESERVED
RESERVED
Note: For error checking on the control register it is advised to
write one byte at a time with PEC enabled. This allows full error
checking to be completed before the control register is updated
and therefore ensures the control is not updated with incorrect
data. The Control register will power-up in the following state
xA000h (i.e. in Power-down)
“1” = Multiply X 1.
“0” = Multiply X 5;
(400mv)
(1.0v)
(Normal Mode = 2.0V)
(200mv)
AD5933