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| 型号： | EVAL-AD5934EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/32页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD5934 |
| 标准包装： | 1 |
| 主要目的： | 计时，直接数字合成（DDS） |
| 嵌入式： | 否 |
| 已用 IC / 零件： | AD5934 |
| 主要属性： | 12 位数模转换器，24 位调节字宽 |
| 次要属性： | 16MHz 2.7 V ~ 5.5 V 图形用户界面 |
| 已供物品： | 板，线缆，软件 |
| 产品目录页面： | 797 (CN2011-ZH PDF) |
| 相关产品： | AD5934YRSZ-ND - IC NTWK ANALYZER 12B 1MSP 16SSOP AD5934YRSZ-REEL7-ND - IC CONV 12BIT 250KSPS 16SSOP |
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AD5934
Data Sheet
Rev. C | Page 20 of 32
REGISTER MAP
Table 7.
Register Name
Register Address
Bits
Function
Control
0x80
D15 to D8
Read/write
0x81
D7 to D0
Read/write
Start Frequency
0x82
D23 to D16
Read/write
0x83
D15 to D8
Read/write
0x84
D7 to D0
Read/write
Frequency Increment
0x85
D23 to D16
Read/write
0x86
D15 to D8
Read/write
0x87
D7 to D0
Read/write
Number of Increments
0x88
D15 to D8
Read/write
0x89
D7 to D0
Read/write
Number of Settling Time Cycles
0x8A
D15 to D8
Read/write
0x8B
D7 to D0
Read/write
Status
0x8F
D7 to D0
Read only
Real Data
0x94
D15 to D8
Read only
0x95
D7 to D0
Read only
Imaginary Data
0x96
D15 to D8
Read only
0x97
D7 to D0
Read only
CONTROL REGISTER (REGISTER ADDRESS 0x80,
REGISTER ADDRESS 0x81)
The AD5934 contains a 16-bit control register (Register Address
0x80 and Register Address 0x81) that sets the control modes.
The default value of the control register upon reset is as follows:
D15 to D0 is 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 can choose to write only to Register Address 0x80 and
to not 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
Table 8. D10 to D9 Control Register Map
D10
D9
Range No.
Output Voltage Range
0
1
2.0 V p-p typical
0
1
3
200 mV p-p typical
1
0
4
400 mV p-p typical
1
2
1.0 V p-p typical
Table 9. D11 and D8 to D0 Control Register Map
Bits
Description
D11
No operation
D8
PGA gain; 0 = ×5, 1 = ×1
D7
Reserved; set to 0
D6
Reserved; set to 0
D5
Reserved; set to 0
D4
Reset
D3
External system clock; set to 1
Internal system clock; set to 0
D2
Reserved; set to 0
D1
Reserved; set to 0
D0
Reserved; set to 0
Table 10. D15 to D12 Control Register Map
D15
D14
D13
D12
Description
0
No operation
0
1
Initialize with start frequency
0
1
0
Start frequency sweep
0
1
Increment frequency
0
1
0
Repeat frequency
1
0
No operation
1
0
1
No operation
1
0
1
0
Power-down mode
1
0
1
Standby mode
1
0
No operation
1
0
1
No operation
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