3B34-N-01

更新时间： 2024-01-20 11:21:35

品牌	Logo	应用领域
亚德诺 - ADI		模拟IC 信号电路
页数	文件大小	规格书
8页	348K
描述
Isolated, Linearized RTD Input

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3B34-N-01 技术参数

Source Url Status Check Date：	2013-05-01 14:56:03.478	是否无铅：	含铅
是否Rohs认证：	不符合	生命周期：	Obsolete
Reach Compliance Code：	not_compliant	HTS代码：	8542.39.00.01
风险等级：	5.65	模拟集成电路 - 其他类型：	ANALOG CIRCUIT
JESD-30 代码：	R-XXMA-X	负电源电压最大值（Vsup）：	-16.5 V
负电源电压最小值（Vsup）：	-11.5 V	标称负供电电压 (Vsup)：	-15 V
功能数量：	1	最高工作温度：	85 °C
最低工作温度：	-25 °C	封装主体材料：	UNSPECIFIED
封装形状：	RECTANGULAR	封装形式：	MICROELECTRONIC ASSEMBLY
峰值回流温度（摄氏度）：	NOT SPECIFIED	认证状态：	Not Qualified
最大供电电压 (Vsup)：	16.5 V	最小供电电压 (Vsup)：	11.5 V
标称供电电压 (Vsup)：	15 V	表面贴装：	NO
温度等级：	OTHER	端子形式：	UNSPECIFIED
端子位置：	UNSPECIFIED	处于峰值回流温度下的最长时间：	NOT SPECIFIED
Base Number Matches：	1

3B34-N-01 数据手册

3B34

GENERAL DESCRIPTION

The 3B34 is a single-channel signal conditioning module which

amplifies, protects, filters, linearizes, and isolates analog input

voltages from a wide variety of two-, three-, and four-wire

Resistor Temperature Detectors (RTDs), providing

A differential chopper-stabilized low-drift input amplifier

provides stable gain and long-term stability. This enables the use

of very low RTD excitation current to minimize self-heating

and preserve measurement accuracy. A 250 uA excitation

current for platinum and nickel RTDs and a 1mA excitation

current for copper RTDs is provided to create an input voltage

to the 3B34. For three-wire RTDs, the excitation current flows

through the third RTD lead to eliminate the effect of lead

resistance with an accuracy of +0.02oC/W. Internal multi-pole

low-pass filtering with a 3-Hz cutoff (-3dB) enhances normal-

mode and common-mode ejection at 50/60 Hz, enabling

accurate measurement of small signals in high electrical noise.

The differential input circuit on the field side is fully floating,

eliminating the need for any input grounding. Signal isolation is

accomplished by transformer coupling using a proprietary

modulation technique for linear, stable and reliable

simultaneous precision voltage and current outputs, linear to

input temperature. RTD excitation current and three-wire lead

resistance compensation provide a complete signal conditioning

solution. The 3B34 protects its computer side outputs from

damage and loss of signal integrity by isolating them up to

+1500V peak and shielding its input and excitation circuit from

damage from field-side over-voltage faults up to 220V rms. The

current output withstands 130V rms without damage and

interfaces to user equipment through screw terminals on the 3B

Series backplane. The 3B34 is a plug-in, mix-and-match, hot-

swappable module, easily field calibrated via front-panel zero

and span adjustments for both voltage and current outputs.

performance. A demodulator on the computer side of the signal

transformer recovers the original signal, which is then filtered

and buffered to provide a low-noise, low-impedance output

voltage; this output also drives a voltage-to-current converter to

provide a simultaneous current output for interfacing versatility.

3B Series Custom-Ranging Program – Externally-

programmable Model 3B34-00, enables the user to configure a

special input range by using the optional plug-on AC1310

ranging card, which houses user-supplied resistors to determine

zero and span. To facilitate selecting resistors, a Windows

program, 3B-CUSTOM, calculates resistor values based on the

user-desired input/output ranges.

Figure 2

Rev. 0 | Page 2 of 8

123 4 5 6 7 8

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