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參數(shù)資料
| 型號： | AD5232BRU10 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數(shù)字電位計 |
| 英文描述： | 8-Bit Dual Nonvolatile Memory Digital Potentiometer |
| 中文描述： | DUAL 10K DIGITAL POTENTIOMETER, 3-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO16 |
| 封裝： | MO-153AB, TSSOP-16 |
| 文件頁數(shù)： | 8/20頁 |
| 文件大?。?/td> | 268K |
| 代理商： | AD5232BRU10 |
REV. 0
–8–
AD5232
SE RIAL DAT A INT E RFACE
T he AD5232 contains a 4-wire SPI-compatible digital interface
(SDI, SDO,
CS
, and CLK ), and uses a 16-bit serial data word
loaded MSB first. T he format of the SPI-compatible word is
shown in T able II. T he chip select
(CS)
pin needs to be held
low until the complete data word is loaded into the SDI pin.
When
CS
returns high, the serial data word is decoded accord-
ing to the instructions in T able III. T he Command Bits (Cx)
control the operation of the digital potentiometer. T he Address
Bits (Ax) determine which register is activated. T he Data Bits
(Dx) are the values that are loaded into the decoded register.
T able IV provides an address map of the EEMEM locations.
T he last instruction executed prior to a period of no program-
ming activity should be the No Operation (NOP) instruction.
T his will place the internal logic circuitry in a minimum power
dissipation state.
VALID
COMMAND
COUNTER
COMMAND
PROCESSOR
AND ADDRESS
DECODE
SERIAL
REGISTER
CLK
SDI
5V
R
PULLUP
SDO
GND
PR
WP
CS
AD5232
Figure 3. Equivalent Digital Input-Output Logic
T he equivalent serial data input and output logic is shown in
Figure 3. T he open-drain output SDO is disabled whenever chip
select
CS
is logic high. T he SPI interface can be used in two slave
modes C PHA = 1, C POL = 1 and C PHA = 0, C POL = 0.
C PHA and C POL refer to the control bits, which dictate
SPI timing in these MicroC onverters
and microprocessors:
ADuC812/ADuC824, M68HC11, and MC68HC16R1/916R1.
ESD protection of the digital inputs is shown in Figures 4a and 4b.
LOGIC
PINS
V
DD
GND
INPUTS
300
AD5232
Figure 4a. Equivalent ESD Digital Input Protection
V
DD
GND
INPUT
300
WP
AD5232
Figure 4b. Equivalent
WP
Input Protection
DAISY CHAINING OPE RAT ION
T he serial data output pin (SDO) serves two purposes. It can
be used to read out the contents of the wiper setting and
EEMEM values using instruction 10 and 9 respectively. T he
remaining instructions (#0–8, #11–15) are valid for daisy-
chaining multiple devices in simultaneous operations.
D aisy-chaining minimizes the number of port pins required
from the controlling IC (see Figure 5). T he SDO pin contains
an open drain N-Channel FET that requires a pull-up resistor if
this function is used. As shown in Figure 5, users need to tie
the SDO pin of one package to the SD I pin of the next
package. Users may need to increase the clock period because
the pull-up resistor and the capacitive loading at the SDO-SDI
interface may require additional time delay between subsequent
packages. If two AD5232’s are daisy-chained, 32 bits of data
are required. T he first 16 bits go to U2 and the second 16
bits with the same format go to U1. T he 16 bits are formatted
to contain the 4-bit instruction, followed by the 4-bit address,
then the 8 bits of data. T he
CS
should be kept low until all 32
bits are locked into their respective serial registers. T he
CS
is then pulled high to complete the operation.
SDI
SDO
CLK
+V
R
P
2k
C
SDI
SDO
CLK
CS
CS
U1
U2
AD5232
AD5232
Figure 5. Daisy-Chain Configuration Using SDO
MicroConverter is a registered trademark of Analog Devices, Inc.
T able II. 16-Bit Serial Data Word
MSB B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
LSB
AD5232
C3
C2
C1
C0
A3
A2
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
Command bits are identified as Cx, address bits are Ax, and data bits are Dx. Command instruction codes are defined
in T able III.
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| AD5232BRU100 | 功能描述:IC DGTL POT DUAL 256POS 16-TSSOP RoHS:否 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:2,500 系列:XDCP™ 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 ±300 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 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) |
| AD5232BRU100-REEL7 | 功能描述:IC DGTL POT DUAL 256POS 16-TSSOP RoHS:否 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) |
| AD5232BRU10-REEL7 | 功能描述:IC DGTL POT DUAL 256POS 16-TSSOP RoHS:否 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) |
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