参数资料
型号: AD5231BRU50
厂商: Analog Devices Inc
文件页数: 9/28页
文件大小: 0K
描述: IC DGTL POT 1024POS 16-TSSOP
产品变化通告: Product Discontinuance 27/Oct/2011
标准包装: 96
接片: 1024
电阻(欧姆): 50k
电路数: 1
温度系数: 标准值 600 ppm/°C
存储器类型: 非易失
接口: 4 线 SPI(芯片选择)
电源电压: 2.7 V ~ 5.5 V,±2.25 V ~ 2.75 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 管件
Data Sheet
AD5231
Rev. D | Page 17 of 28
In Table 6, command bits are C0 to C3, address bits are A3 to A0, Data Bit D0 to Data Bit D9 are applicable to RDAC, and D0 to D15 are
applicable to EEMEM.
Table 6. AD5231 24-Bit Serial Data-Word
MSB Command Byte 0
Data Byte 1
Data Byte 0
LSB
RDAC
C3
C2
C1
C0
0
X
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
EEMEM
C3
C2
C1
C0
A3
A2
A1
A0
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Command instruction codes are defined in Table 7.
Table 7. Command/Operation Truth Table1, 2, 3
Instruction
Number
Command Byte 0
Data Byte 1
Data Byte 0
Operation
B23
B16
B15
B8
B7
B0
C3
C2
C1
C0
A3
A2
A1
A0
X
D9
D8
D7
D0
0
X
X
X
NOP: Do nothing. See Table 15.
1
0
1
0
X
X
X
Restore EEMEM(0) contents to RDAC register.
This command leaves the device in the read
program power state. To return the part to
the idle state, perform NOP instruction 0. See
2
0
1
0
X
X
X
Store Wiper Setting: Store RDAC setting to
EEMEM(0). See Table 14.
0
1
A3
A2
A1
A0
D15
D8
D7
D0
Store contents of Data Bytes 0 and 1 (total
16 bits) to EEMEM (ADDR 1to ADDR 15). See
0
1
0
X
X
X
Decrement RDAC by 6 dB.
0
1
0
1
X
X
X
Same as Instruction 4.
0
1
0
X
X
X
Decrement RDAC by 1 position.
0
1
X
X
X
Same as Instruction 6.
8
1
0
X
X
X
Reset: Restore RDAC with EEMEM (0) value.
9
1
0
1
A3
A2
A1
A0
X
X
X
Read EEMEM (ADDR 0 to ADDR 15) from SDO
output in the next frame. See Table 18.
10
1
0
1
0
X
X
X
Read RDAC wiper setting from SDO output
in the next frame. See Table 19.
11
1
0
1
0
X
D9
D8
D7
D0
Write contents of Data Bytes 0 and 1 (total
10 bits) to RDAC. See Table 13.
1
0
X
X
X
Increment RDAC by 6 dB. See Table 16.
1
0
1
X
X
X
Same as Instruction 12.
1
0
X
X
X
Increment RDAC by 1 position. See Table 14.
1
X
X
X
Same as Instruction 14.
1
The SDO output shifts out the last 24 bits of data clocked into the serial register for daisy-chain operation. Exception: for any instruction following Instruction 9 or
Instruction 10, the selected internal register data is present in Data Byte 0 and Data Byte 1. The instruction following 9 and 10 must also be a full 24-bit data-word to
completely clock out the contents of the serial register.
2
The RDAC register is a volatile scratchpad register that is refreshed at power-on from the corresponding nonvolatile EEMEM register.
3
Execution of these operations takes place when the CS strobe returns to logic high.
4
Instruction 3 writes two data bytes (16 bits of data) to EEMEM. In the case of 0 addresses, only the last 10 bits are valid for wiper position setting.
5
The increment, decrement, and shift instructions ignore the contents of the shift register Data Byte 0 and Data Byte 1.
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