Datasheet > AD8142-EVALZ

AD8142-EVALZ

更新时间： 2024-02-17 06:17:31

品牌	Logo	应用领域
亚德诺 - ADI		驱动器
页数	文件大小	规格书
24页	451K
描述
Low Cost, Triple Differential Drivers

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技术参数
数据手册

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AD8142-EVALZ 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,	针数：	24
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.7
差分输出：	YES	驱动器位数：	3
输入特性：	DIFFERENTIAL	接口集成电路类型：	LINE DRIVER
接口标准：	GENERAL PURPOSE	JESD-30 代码：	S-XQCC-N24
JESD-609代码：	e3	长度：	4 mm
湿度敏感等级：	1	功能数量：	3
端子数量：	24	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
认证状态：	Not Qualified	最大接收延迟：
座面最大高度：	0.8 mm	最大供电电压：	5.5 V
最小供电电压：	4.5 V	标称供电电压：	5 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	NO LEAD	端子节距：	0.5 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	30
宽度：	4 mm	Base Number Matches：	1

AD8142-EVALZ 数据手册

AD8141/AD8142

In Figure 43, V_{R, CM}= V_{O, CM}+ V_SHIFT. If V_{O, CM}= 0 V and V_SHIFT

2 V, V_{R, CM}is 2 V. This is because the receiver ground is shifted

down by 2 V relative to the driver ground, and the common-

mode level on the cable stays constant. It can be seen from this

example that the most margin to absorb ground shifts exists

when the center of the receiver input common-mode voltage

range relative to its ground is the same as the output common-

mode voltage of the driver with respect to its ground.

SINGLE 5 V SUPPLY APPLICATION INFORMATION

The AD8141 and AD8142 require a nominal voltage of 5 V

across their V_S+and V_S−power supply pins, and that their EPADs

be connected to system ground; the voltage between V_S+and the

local system ground must be greater than or equal to 2.5 V and

less than or equal to 5 V. These requirements can be met by a

single +5 V supply, or split supplies such as 2.5 V, +3 V/−2 V,

and so on. Operating the AD8141 and AD8142 with 2.5 V

supplies provides considerable power savings compared with

other drivers operating at 5 V supplies, without any disadvantages

with regard to input and output ranges in most cases.

Most receivers operate with their input common-mode ranges

centered at 0 V; therefore, the best case for the driver is to set its

output common-mode voltage to 0 V. This is not possible for the

AD8141 or AD8142on a single 5 V supply, but can be accomplished

using split supplies. If a single 5 V supply is required, the rail-

to-rail output allows the AD8141 output common-mode voltage

to be set to less than 1 V to be as close as possible to the ideal

setting of 0 V. Whereas the AD8141 has uncommitted V_OCMinputs,

the AD8142 has internal sync-encoding circuitry that fixes the

nominal output common-mode voltage at 1.5 V above the negative

rail. Each part has a resistive divider on the V_OCMinput that sets

the nominal output common-mode voltage to 1.5 V above the

negative rail when no external voltage is applied. The divider

consists of a 8.75 kΩ resistor to V_S+and a 3.75 kΩ resistor to V_S−,

forming a Thevenin equivalent load of 2.6 kΩ to 30% of the

voltage across the supplies. In the single 5 V supply case, the

Thevenin load voltage is 30% of 5 V above 0 V, or 1.5 V.

The receivers used with the AD8141 and AD8142, such as the

AD8145, AD8143, AD8123, and AD8128, generally operate

with split supplies, ranging from 5 V to 12 V. The split supply

arrangement results in a receiver input common-mode range

that is centered at 0 V relative to the local ground reference and

ranges to within a volt or two from each rail. Ground potential

differences normally exist between the driver end and the receiver

end, and these differences cause the relative common-mode

voltages between the driver and receiver to shift. See Figure 43

for an example.

DRIVER

AD8141/AD8142

49.9Ω

–

100Ω

UTP

100Ω

OCM

49.9Ω

–

O, CM

R, CM

–

SHIFT

Figure 43. End-to-End Common-Mode Shifts due to Ground Shifts

Rev. 0 | Page 19 of 24

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AD8143ACPZ-R2	ADI	High Speed, Triple Differential Receiver with Comparators	获取价格
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AD8143ACPZ-RL	ADI	IC LINE RECEIVER, QCC32, 5 X 5 MM, LEAD FREE, MO-220-VHHD-2, LFCSP-32, Line Driver or Rece	获取价格

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