AD524S

更新时间： 2024-01-26 18:43:51

品牌	Logo	应用领域
亚德诺 - ADI		仪表放大器
页数	文件大小	规格书
16页	395K
描述
Precision Instrumentation Amplifier

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技术参数
数据手册

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AD524S 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	QLCC	包装说明：	LCC-20
针数：	20	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.31.00.01
风险等级：	5.67	Is Samacsys：	N
放大器类型：	INSTRUMENTATION AMPLIFIER	最大平均偏置电流 (IIB)：	0.05 µA
标称带宽 (3dB)：	1 MHz	最小共模抑制比：	70 dB
最大输入失调电流 (IIO)：	0.035 µA	最大输入失调电压：	100 µV
JESD-30 代码：	S-CQCC-N20	JESD-609代码：	e0
长度：	8.89 mm	负供电电压上限：	-18 V
标称负供电电压 (Vsup)：	-15 V	最大非线性：	0.01%
功能数量：	1	端子数量：	20
最高工作温度：	125 °C	最低工作温度：	-55 °C
封装主体材料：	CERAMIC, METAL-SEALED COFIRED	封装代码：	QCCN
封装等效代码：	LCC20,.35SQ	封装形状：	SQUARE
封装形式：	CHIP CARRIER	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	+-15 V	认证状态：	Not Qualified
座面最大高度：	2.54 mm	标称压摆率：	0.1 V/us
子类别：	Instrumentation Amplifier	最大压摆率：	5 mA
供电电压上限：	18 V	标称供电电压 (Vsup)：	15 V
表面贴装：	YES	温度等级：	MILITARY
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	NO LEAD
端子节距：	1.27 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	NOT SPECIFIED	最大电压增益：	1000
最小电压增益：	1	标称电压增益：	1000
宽度：	8.89 mm	Base Number Matches：	1

AD524S 数据手册

AD524

acquisition components. Separate ground returns should be

provided to minimize the current flow in the path from the sensi-

tive points to the system ground point. In this way supply currents

and logic-gate return currents are not summed into the same

return path as analog signals where they would cause measure-

ment errors.

REFERENCE TERMINAL

The reference terminal may be used to offset the output by up

to ±10 V. This is useful when the load is “floating” or does not

share a ground with the rest of the system. It also provides a

direct means of injecting a precise offset. It must be remem-

bered that the total output swing is ±10 volts to be shared be-

tween signal and reference offset.

Since the output voltage is developed with respect to the poten-

tial on the reference terminal, an instrumentation amplifier can

solve many grounding problems.

When the IA is of the three-amplifier configuration it is neces-

sary that nearly zero impedance be presented to the reference

terminal.

Any significant resistance from the reference terminal to ground

increases the gain of the noninverting signal path, thereby upset-

ting the common-mode rejection of the IA.

DIGITAL P.S.

ANALOG P.S.

+15V –15V

+5V

In the AD524 a reference source resistance will unbalance the

CMR trim by the ratio of 20 kΩ/R_REF. For example, if the refer-

ence source impedance is 1 Ω, CMR will be reduced to 86 dB

(20 kΩ/1 Ω = 86 dB). An operational amplifier may be used to

provide that low impedance reference point as shown in Figure

39. The input offset voltage characteristics of that amplifier will

add directly to the output offset voltage performance of the

instrumentation amplifier.

0.1 0.1

1␮F 1␮F

1␮F

␮F ␮F

DIG

COM

AD583

SAMPLE

AND HOLD

DIGITAL

DATA

OUTPUT

AD524

AD574A

*ANALOG

GROUND

OUTPUT

REFERENCE

SIGNAL

GROUND

SENSE

*IF INDEPENDENT; OTHERWISE RETURN AMPLIFIER REFERENCE

TO MECCA AT ANALOG P.S. COMMON

Figure 37. Basic Grounding Practice

AD524

LOAD

REF

–

SENSE TERMINAL

The sense terminal is the feedback point for the instrument

amplifier’s output amplifier. Normally it is connected to the

instrument amplifier output. If heavy load currents are to be

drawn through long leads, voltage drops due to current flowing

through lead resistance can cause errors. The sense terminal can

be wired to the instrument amplifier at the load, thus putting

the IxR drops “inside the loop” and virtually eliminating this

error source.

–V

OFFSET

AD711

Figure 39. Use of Reference Terminal to Provide Output

Offset

An instrumentation amplifier can be turned into a voltage-to-

current converter by taking advantage of the sense and reference

terminals as shown in Figure 40.

V+

(SENSE)

OUTPUT

CURRENT

SENSE

+INPUT

BOOSTER

AD524

(REF)

–

–INPUT

REF

V–

AD711

LOAD

Figure 38. AD524 Instrumentation Amplifier with Output

Current Booster

40,000

(1 +

)

Typically, IC instrumentation amplifiers are rated for a full ±10

volt output swing into 2 kΩ. In some applications, however, the

need exists to drive more current into heavier loads. Figure 38

shows how a high-current booster may be connected “inside the

loop” of an instrumentation amplifier to provide the required

current boost without significantly degrading overall perfor-

mance. Nonlinearities, offset and gain inaccuracies of the buffer

are minimized by the loop gain of the IA output amplifier. Off-

set drift of the buffer is similarly reduced.

Figure 40. Voltage-to-Current Converter

By establishing a reference at the “low” side of a current setting

resistor, an output current may be defined as a function of input

voltage, gain and the value of that resistor. Since only a small

current is demanded at the input of the buffer amplifier A₂, the

forced current I_Lwill largely flow through the load. Offset and

drift specifications of A₂must be added to the output offset and

drift specifications of the IA.

REV. E

–11–

1...8 9 101112 13 14...16

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与AD524S相关器件

型号	品牌	描述	获取价格	数据表
AD524SCHIPS	ADI	Precision Instrumentation Amplifier	获取价格
AD524SD	ADI	Precision Instrumentation Amplifier	获取价格
AD524SD/883B	ADI	Precision Instrumentation Amplifier	获取价格
AD524SE	ADI	Precision Instrumentation Amplifier	获取价格
AD524SE	ROCHESTER	INSTRUMENTATION AMPLIFIER, 100uV OFFSET-MAX, 1MHz BAND WIDTH, CQCC20, LCC-20	获取价格
AD524SE/883B	ADI	Precision Instrumentation Amplifier	获取价格

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