- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9424 > AD5235BRUZ250 (Analog Devices Inc)IC DGTL POT DUAL 1024POS 16TSSOP PDF資料下載
參數(shù)資料
| 型號(hào)： | AD5235BRUZ250 |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 14/32頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC DGTL POT DUAL 1024POS 16TSSOP |
| 產(chǎn)品變化通告： | Metal Edit Change 03/Feb/2012 |
| 標(biāo)準(zhǔn)包裝： | 96 |
| 接片： | 1024 |
| 電阻（歐姆）： | 250k |
| 電路數(shù)： | 2 |
| 溫度系數(shù)： | 標(biāo)準(zhǔn)值 35 ppm/°C |
| 存儲(chǔ)器類型： | 非易失 |
| 接口： | 4 線 SPI（芯片選擇） |
| 電源電壓： | 3 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： | 16-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-TSSOP |
| 包裝： | 管件 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)當(dāng)前第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)
Data Sheet
AD5235
Rev. F | Page 21 of 32
Using CS to Re-Execute a Previous Command
Another subtle feature of the AD5235 is that a subsequent CS
strobe, without clock and data, repeats a previous command.
Using Additional Internal Nonvolatile EEMEM
The AD5235 contains additional user EEMEM registers for
storing any 16-bit data such as memory data for other components,
look-up tables, or system identification information. Table 9 pro-
vides an address map of the internal storage registers shown in the
functional block diagram (see Figure 1) as EEMEM1, EEMEM2,
and 26 bytes (13 addresses × 2 bytes each) of User EEMEM.
Table 9. EEMEM Address Map
EEMEM No.
Address
EEMEM Content for …
1
0000
RDAC11
2
0001
RDAC2
3
0010
USER12
4
0011
USER2
…
15
1110
USER13
16
1111
1
RDAC data stored in EEMEM locations is transferred to the corresponding
RDAC register at power-on, or when Instruction 1, Instruction 8, and PR are
executed.
2
USERx are internal nonvolatile EEMEM registers available to store and
retrieve constants and other 16-bit information using Instruction 3 and
Instruction 9, respectively.
3
Read only.
Calculating Actual End-to-End Terminal Resistance
The resistance tolerance is stored in the EEMEM register during
factory testing. The actual end-to-end resistance can, therefore,
be calculated, which is valuable for calibration, tolerance matching,
and precision applications. Note that this value is read only and
the RAB2 matches with RAB1, typically 0.1%.
The resistance tolerance in percentage is contained in the last
16 bits of data in EEMEM Register 15. The format is the sign
magnitude binary format with the MSB designate for sign
(0 = negative and 1 = positive), the next 7 MSB designate the
integer number, and the 8 LSB designate the decimal number
For example, if RAB_RATED = 250 k and the data in the SDO
shows XXXX XXXX 1001 1100 0000 1111, RAB_ACTUAL can be
calculated as follows:
MSB: 1 = positive
Next 7 LSB: 001 1100 = 28
8 LSB: 0000 1111 = 15 × 28 = 0.06
% tolerance = 28.06%
Therefore, RAB_ACTUAL = 320.15 k
RDAC STRUCTURE
The patent-pending RDAC contains multiple strings of equal
resistor segments with an array of analog switches that acts as
the wiper connection. The number of positions is the resolution of
the device. The AD5235 has 1024 connection points, allowing it to
provide better than 0.1% setability resolution. Figure 45 shows
an equivalent structure of the connections among the three
terminals of the RDAC. The SWA and SWB are always on, while
the switches, SW(0) to SW(2N 1), are on one at a time, depending
on the resistance position decoded from the data bits. Because
the switch is not ideal, there is a 50 wiper resistance, RW.
Wiper resistance is a function of supply voltage and temperature.
The lower the supply voltage or the higher the temperature, the
higher the resulting wiper resistance. Users should be aware of
the wiper resistance dynamics, if accurate prediction of the
output resistance is needed.
SW(1)
SW(0)
SWB
B
RS
SWA
SW(2N–1)
A
W
SW(2N–2)
RDAC
WIPER
REGISTER
AND
DECODER
RS = RAB/2N
RS
DIGITAL
CIRCUITRY
OMITTED FOR
CLARITY
02816-
044
Figure 45. Equivalent RDAC Structure
Table 10. Nominal Individual Segment Resistor Values
Device Resolution
25 k
250 k
1024-Step
24.4
244
Table 11. Calculating End-to-End Terminal Resistance
Bit
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Sign
Mag
Sign
26
25
24
23
22
21
20
.
21
22
23
24
25
26
27
28
7 Bits for Integer Number
Decimal
Point
8 Bits for Decimal Number
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD5235BRUZ25 | IC DGTL POT DUAL 1024POS 16TSSOP |
| AD8403ARUZ100 | IC POT DGTL QUAD 100K 24-TSSOP |
| AD8403ARUZ50 | IC POT DIG QUAD 50K 8BIT 24TSSOP |
| VI-BN4-IU-F3 | CONVERTER MOD DC/DC 48V 200W |
| VE-23Z-MY-F4 | CONVERTER MOD DC/DC 2V 20W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD5235BRUZ250-R7 | 功能描述:IC DGTL POT DUAL 1024POS 16TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 300 ppm/°C 存儲(chǔ)器類型:非易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.5 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
| AD5235BRUZ25-EP-R7 | 功能描述:IC DGTL POT 1024POS DUAL 16TSSOP 制造商:analog devices inc. 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1,000 |
| AD5235BRUZ25-RL7 | 功能描述:IC DGTL POT DUAL 1024POS 16TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 300 ppm/°C 存儲(chǔ)器類型:非易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.5 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
| AD5235-EP | 制造商:AD 制造商全稱:Analog Devices 功能描述:Nonvolatile Memory, Dual 1024-Position Digital Potentiometer |
| AD5235EVAL | 制造商:Analog Devices 功能描述:DUAL 10BIT SPI EVAL BOARD - Bulk |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。