ADN2850BCPZ250

更新时间： 2024-02-04 06:55:04

品牌	Logo	应用领域
亚德诺 - ADI		转换器电位器数字电位计电阻器
页数	文件大小	规格书
28页	604K
描述
Nonvolatile Memory, Dual 1024-Position Digital Resistor

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技术参数
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ADN2850BCPZ250 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	QFN
包装说明：	HVQCCN, LCC16,.2SQ,32	针数：	16
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	2.18
其他特性：	NONVOLATILE MEMORY	控制接口：	3-WIRE SERIAL
转换器类型：	DIGITAL POTENTIOMETER	JESD-30 代码：	S-XQCC-N16
JESD-609代码：	e3	长度：	5 mm
湿度敏感等级：	3	标称负供电电压：	-2.5 V
功能数量：	2	位置数：	1024
端子数量：	16	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	UNSPECIFIED
封装代码：	HVQCCN	封装等效代码：	LCC16,.2SQ,32
封装形状：	SQUARE	封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：	260	电源：	+-2.5/3.3/5 V
认证状态：	Not Qualified	电阻定律：	LINEAR/LOGARITHMIC
最大电阻容差：	8%	最大电阻器端电压：	2.75 V
最小电阻器端电压：	-2.25 V	座面最大高度：	1 mm
子类别：	Digital Potentiometers	标称供电电压：	2.5 V
表面贴装：	YES	标称温度系数：	35 ppm/ °C
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	NO LEAD	端子节距：	0.8 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	40
标称总电阻：	250000 Ω	宽度：	5 mm
Base Number Matches：	1

ADN2850BCPZ250 数据手册

Nonvolatile Memory, Dual

1024-Position Digital Resistor

Data Sheet

ADN2850

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Dual-channel, 1024-position resolution

25 kΩ, 250 kΩ nominal resistance

ADN2850

ADDR

DECODE

RDAC1

CLK

SDI

Maximum 8% nominal resistor tolerance error

Low temperature coefficient: 35 ppm/°C

2.7 V to 5 V single supply or 2.5 V dual supply

Current monitoring configurable function

SPI-compatible serial interface

SERIAL

INTERFACE

RDAC1

SDO

EEMEM1

POWER-ON

RESET

RDAC1

Nonvolatile memory stores wiper settings

Power-on refreshed with EEMEM settings

Permanent memory write protection

Resistance tolerance stored in EEMEM

26 bytes extra nonvolatile memory for user-defined

information

EEMEM

CONTROL

RDY

RDAC2

EEMEM2

26 BYTES

USER EEMEM

CURRENT

MONITOR

RTOL*

GND

1M programming cycles

100-year typical data retention

FULL SCALE TOLERANCE.

APPLICATIONS

Figure 1.

SONET, SDH, ATM, Gigabit Ethernet, DWDM laser diode

driver, optical supervisory systems

Mechanical rheostat replacement

Instrumentation gain adjustment

Programmable filters, delays, time constants

Sensor calibration

In the scratchpad programming mode, a specific setting can

be programmed directly to the RDAC²register, which sets the

resistance between Terminal W and Terminal B. This setting can

be stored into the EEMEM and is restored automatically to the

RDAC register during system power-on.

The EEMEM content can be restored dynamically or through

GENERAL DESCRIPTION

external

strobing, and a

function protects EEMEM

The ADN2850 is a dual-channel, nonvolatile memory¹, digitally

controlled resistors²with 1024-step resolution, offering

guaranteed maximum low resistor tolerance error of 8%. The

device performs the same electronic adjustment function as a

mechanical rheostat with enhanced resolution, solid state

reliability, and superior low temperature coefficient

performance. The versatile programming of the ADN2850 via

an SPI®-compatible serial interface allows 16 modes of

operation and adjustment including scratchpad programming,

memory storing and restoring, increment/decrement, 6 dB/step

log taper adjustment, wiper setting readback, and extra EEMEM¹

for user-defined information such as memory data for other

components, look-up table, or system identification

information.

contents. To simplify the programming, the independent or

simultaneous linear-step increment or decrement commands

can be used to move the RDAC wiper up or down, one step at a

time. For logarithmic 6 dB changes in the wiper setting, the

left or right bit shift command can be used to double or halve the

RDAC wiper setting.

The ADN2850 patterned resistance tolerance is stored in the

EEMEM. The actual full scale resistance can, therefore, be

known by the host processor in readback mode. The host can

execute the appropriate resistance step through a software

routine that simplifies open-loop applications as well as

precision calibration and tolerance matching applications.

The ADN2850 is available in the 5 mm × 5 mm 16-lead frame

chip scale LFCSP and thin, 16-lead TSSOP package. The part is

guaranteed to operate over the extended industrial temperature

range of −40°C to +85°C.

¹The terms nonvolatile memory and EEMEM are used interchangeably.

²The terms digital resistor and RDAC are used interchangeably.

Rev. E

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rightsof third parties that may result fromits use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks andregisteredtrademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

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