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| 型号： | AD5233BRUZ10-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/32页 |
| 文件大小： | 0K |
| 描述： | IC DGTL POT QUAD 64POS 24-TSSOP |
| 标准包装： | 1,000 |
| 接片： | 64 |
| 电阻（欧姆）： | 10k |
| 电路数： | 4 |
| 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： | 24-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 24-TSSOP |
| 包装： | 带卷 (TR) |
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AD5233
Rev. B | Page 16 of 32
EEMEM PROTECTION
The write protect (WP) pin disables any changes to the
scratchpad register contents, except for the EEMEM setting,
which can still be restored using Instruction 1, Instruction 8,
and the PR pulse. Therefore, WP can be used to provide a
hardware EEMEM protection feature. To disable WP, it is
recommended to execute a NOP instruction before returning
WP to Logic 1.
DIGITAL INPUT/OUTPUT CONFIGURATION
All digital inputs are ESD-protected, high input impedance
that can be driven directly from most digital sources. Active at
Logic 0, PR and WP must be tied to VDD if they are not used.
No internal pull-up resistors are present on any digital input
pins. Because the device can be detached from the driving
source once it is programmed, adding pull-up resistance on
the digital input pins is a good way to avoid falsely triggering
the floating pins in a noisy environment.
The SDO and RDY pins are open-drain digital outputs that
need pull-up resistors only if these functions are used. Use a
resistor in the range of 1 kΩ to 10 kΩ to balance the power
and switching speed trade-off.
SERIAL DATA INTERFACE
The AD5233 contains a 4-wire SPI-compatible digital interface
(SDI, SDO, CS, and CLK). It uses a 16-bit serial data-word
loaded MSB first. The format of the SPI-compatible word is
shown in
. The chip-select
CS pin must be held low until
the complete data-word is loaded into the SDI pin. When CS
returns high, the serial data-word is decoded according to the
instructions in
. The command bits (Cx) control the
operation of the digital potentiometer. The address bits (Ax)
determine which register is activated. The data bits (Dx) are
the values that are loaded into the decoded register. To program
RDAC1 to RDAC4, only the 6 LSB data bits are used.
The AD5233 has an internal counter that counts a multiple
of 16 bits (a frame) for proper operation. For example, the
AD5233 works with a 32-bit word, but it cannot work properly
with a 15-bit or 17-bit word. In addition, the AD5233 has a
subtle feature that, if CS is pulsed without CLK and SDI, the
part repeats the previous command (except during power-up).
As a result, care must be taken to ensure that no excessive noise
exists in the CLK or CS line that might alter the effective number-
of-bits pattern. Also, to prevent data from locking incorrectly
(due to noise, for example), the counter resets, if the count is
not a multiple of four when CS goes high.
VALID
COMMAND
PROCESSOR
AND ADDRESS
DECODE
(FOR DAISY
CHAIN ONLY)
SERIAL
REGISTER
CLK
SDI
5V
RPULL-UP
SDO
GND
PR
WP
CS
AD5233
COUNTER
02
794
-03
7
Figure 36. Equivalent Digital Input-Output Logic
The equivalent serial data input and output logic is shown in
Figure 36. The open-drain output SDO is disabled whenever
chip select (CS) is in Logic 1. The SPI interface can be used
in two slave modes: CPHA = 1, CPOL = 1 and CPHA = 0,
CPOL = 0. CPHA and CPOL refer to the control bits that
dictate SPI timing in the following MicroConverters and
microprocessors:
,
, M68HC11, and
MC68HC16R1/MC68HC916R1. ESD protection of the
digital inputs is shown in
and
.
LOGIC
PINS
VDD
GND
INPUT
300
02
794
-03
8
Figure 37. Equivalent ESD Digital Input Protection
VDD
GND
INPUT
300
WP
02
79
4-
0
39
Figure 38. Equivalent WP Input Protection
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相关代理商/技术参数 |
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| AD5233BRUZ50 | 功能描述:IC POT QUAD 50K 64POS 24-TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 接片:256 电阻（欧姆）:100k 电路数:1 温度系数:标准值 35 ppm/°C 存储器类型:非易失 接口:3 线串口 电源电压:2.7 V ~ 5.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WDFN 裸露焊盘 供应商设备封装:8-TDFN-EP（3x3） 包装:剪切带 (CT) 产品目录页面:1399 (CN2011-ZH PDF) 其它名称:MAX5423ETA+TCT |
| AD5233BRUZ50-R7 | 功能描述:IC DGTL POT QUAD 64POS 24-TSSOP 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) |
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| AD5235BRU25 | 制造商:Analog Devices 功能描述:Digital Potentiometer 1024POS 25KOhm Dual 16-Pin TSSOP 制造商:Analog Devices 功能描述:IC DIGITAL POT 25KOHM 1024 DUAL 16-TSSO |
| AD5235BRU250 | 制造商:Analog Devices 功能描述:Digital Potentiometer 1024POS 250KOhm Dual 16-Pin TSSOP 制造商:Analog Devices 功能描述:IC DUAL DIGITAL POT. 10-BIT |
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