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參數(shù)資料
| 型號： | ADN2860ACPZ25-RL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 6/20頁 |
| 文件大小： | 0K |
| 描述： | IC POT DGTL 3CH 25K 24-LFCSP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 接片： | 128，512，512 |
| 電阻（歐姆）： | 25k |
| 電路數(shù)： | 3 |
| 溫度系數(shù)： | 標(biāo)準(zhǔn)值 35 ppm/°C |
| 存儲器類型： | 非易失 |
| 接口： | I²C（設(shè)備位址） |
| 電源電壓： | 2.7 V ~ 5.5 V，±2.25 V ~ 2.75 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 24-LFCSP-VQ（4x4） |
| 包裝： | 剪切帶 (CT) |
| 其它名稱： | ADN2860ACPZ25RLCT |
ADN2860
Rev. B | Page 14 of 20
RDAC Shortcut Commands
Eleven shortcut commands are provided for easy manipulation
of RDAC registers and their corresponding EEPROM memory
locations. These commands are shown in Table 9. A more
detailed discussion about the RDAC shortcut commands can be
found in the Theory of Operation section.
The interface for issuing an RDAC shortcut command is shown
in Figure 25. All shortcut commands require acknowledge
polling to determine whether the command has finished
executing.
RDAC Resistor Tolerance
The end-to-end resistance tolerance for each RDAC channel is
stored in read-only memory during factory production. This
information is read by using the address and bits specified in
Tolerance values are stored in percentage form. Figure 26 shows
the format of the tolerance data stored in memory. Each stored
tolerance uses two memory locations. The first location stores
the integer portion, while the second location stores the decimal
portion.
The resistance tolerance is stored in sign-magnitude format.
The MSB of the first memory location designates the sign
(0 = +, 1 = ) and the remaining 7 LSBs are designated for the
integer portion of the tolerance. All eight bits of the second
memory location are represented by the decimal portion of the
tolerance value.
Table 8. Addresses for Reading Tolerance (CMD/REG = 0, EE/RDAC = 1, A4 = 1)
A4
A3
A2
A1
A0
Data Byte Description
1
0
Sign and 7-bit integer values of RDAC0 tolerance (read only)
1
0
1
8-bit decimal value of RDAC0 tolerance (read only)
1
0
1
0
Sign and 7-bit integer values of RDAC1 tolerance (read only)
1
0
1
8-bit decimal value of RDAC1 tolerance (read only)
1
0
Sign and 7-bit integer values of RDAC2 tolerance (read only)
1
0
1
8-bit decimal value of RDAC2 tolerance (read only)
7 BITS FOR INTEGER NUMBER
SIGN
26
25
24
23
22
21
20
A
D6
D5
D4
D3
D2
D1
D0
D7
2–2
2–1
2–3
2–4
2–5
2–6
2–7
2–8
A
D6
D5
D4
D3
D2
D1
D0
D7
8 BITS FOR DECIMAL NUMBER
03615-026
Figure 26. Format of Stored Tolerance in Sign Magnitude with Bit Position Descriptions (Unit is in %, Only Data Bytes Shown)
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