参数资料
| 型号： | AD5258BRMZ10 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | IC POT DGTL I2C 10K 64P 10MSOP |
| 标准包装： | 50 |
| 接片： | 64 |
| 电阻（欧姆）： | 10k |
| 电路数： | 1 |
| 温度系数： | 标准值 200 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | I²C（设备位址） |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
| 产品目录页面： | 787 (CN2011-ZH PDF) |
| 配用： | AD5258EVAL-ND - BOARD EVAL FOR AD5258 DGTL POT |
AD5258
Data Sheet
Rev. D | Page 18 of 24
TOLERANCE READBACK MODES
Table 15. Traditional Readback of Tolerance (Individually)
S
7-Bit Device Address
(See Table 5)
0 SA 0 0 1 1 1 1 1 0 SA S
7-Bit Device Address
(See Table 5)
1 SA D7 D6 D5 D4 D3 D2 D1 D0 NA P
Slave Address Byte
Instruction Byte
Slave Address Byte
Sign + Integer Byte
↑
Repeat Start
S
7-Bit Device Address
(See Table 5)
0 SA 0 0 1 1 1 1 1 1 SA S
7-Bit Device Address
(See Table 5)
1 SA D7 D6 D5 D4 D3 D2 D1 D0 NA P
Slave Address Byte
Instruction Byte
Slave Address Byte
Decimal Byte
↑
Repeat Start
Table 16. Traditional Readback of Tolerance (Consecutively)
S
7-Bit Device Address
(See Table 5)
0 SA 0 0 1 1 1 1 1 0 SA S
7-Bit Device Address
(See Table 5)
1 SA D7 D6 D5 D4 D3 D2 D1 D0 MA D7 D6 D5 D4 D3 D2 D1 D0 NA P
Slave Address Byte
Instruction Byte
Slave Address Byte
Sign + Integer Byte
Decimal Byte
↑
Repeat Start
Calculating RAB Tolerance Stored in Read-Only Memory
05029-
040
A
D7
D6
D5
D4
D3
D2
D1
D0
SIGN
SEVEN BITS FOR AN INTEGER NUMBER
26
25
24
23
22
21
20
D7
D6
D5
D4
D3
D2
D1
D0
EIGHT BITS FOR A DECIMAL NUMBER
2–8
2–1
2–2
2–3
2–4
2–5
2–6
2–7
Figure 39. Format of Stored Tolerance in Sign Magnitude Format with Bit Position Descriptions
(Unit is Percent; Only Data Bytes are Shown)
The AD5258 features a patented RAB tolerance storage in the
nonvolatile memory. Tolerance is stored in the memory during
factory production and can be read by users at any time. The
knowledge of stored tolerance allows users to accurately calcu-
late RAB. This feature is valuable for precision, rheostat mode,
and open-loop applications where knowledge of absolute
resistance is critical.
The stored tolerance resides in the read-only memory and is
expressed as a percentage. The tolerance is stored in two memory
location bytes in sign magnitude binary form (see Figure 39). The
two EEPROM address bytes are 11110 (sign + integer) and 11111
(decimal number). The two bytes can be individually accessed
with two separate commands (see Table 15). Alternatively, read-
back of the first byte followed by the second byte can be done
in one command (see Table 16). In the latter case, the memory
pointer automatically increments from the first to the second
EEPROM location (increments from 11110 to 11111) if read
consecutively.
In the first memory location, the MSB is designated for the sign
(0 = + and 1 = ) and the seven LSBs are designated for the integer
portion of the tolerance. In the second memory location, all eight
data bits are designated for the decimal portion of tolerance. Note
that the decimal portion has a limited accuracy of only 0.1%. For
example, if the rated RAB = 10 k and the data readback from
Address 11110 shows 0001 1100 and from Address 11111 shows
0000 1111, the tolerance can be calculated as
MSB: 0 = +
Next 7 MSB: 001 1100 = 28
8 LSB: 0000 1111 = 15 × 2–8 = 0.06
Tolerance = 28.06%
Rounded Tolerance = 28.1% and therefore
RAB_ACTUAL = 12.810 k
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD5258BRMZ100 | 功能描述:IC POT DGTL I2C 100K 64P 10MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,300 系列:WiperLock™ 接片:257 电阻（欧姆）:100k 电路数:1 温度系数:标准值 150 ppm/°C 存储器类型:易失 接口:3 线 SPI（芯片选择） 电源电压:1.8 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-VDFN 裸露焊盘 供应商设备封装:8-DFN-EP（3x3） 包装:带卷 (TR) |
| AD5258BRMZ1001 | 制造商:AD 制造商全称:Analog Devices 功能描述:Nonvolatile, I2C-Compatible 64-Position, Digital Potentiometer |
| AD5258BRMZ100-R7 | 功能描述:IC POT DGTL I2C 100K 64P 10MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,000 系列:DPP 接片:32 电阻（欧姆）:10k 电路数:1 温度系数:标准值 300 ppm/°C 存储器类型:非易失 接口:3 线串行（芯片选择，递增，增/减） 电源电压:2.5 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 供应商设备封装:8-TDFN（2x3） 包装:带卷 (TR) |
| AD5258BRMZ100-R71 | 制造商:AD 制造商全称:Analog Devices 功能描述:Nonvolatile, I2C-Compatible 64-Position, Digital Potentiometer |
| AD5258BRMZ101 | 制造商:AD 制造商全称:Analog Devices 功能描述:Nonvolatile, I2C-Compatible 64-Position, Digital Potentiometer |
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