AD627BRZ-RL

更新时间： 2024-01-14 13:52:31

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
24页	1075K
描述
Micropower, Single- and Dual-Supply, Rail-to-Rail Instrumentation Amplifier

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技术参数
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AD627BRZ-RL 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：	SOIC
包装说明：	SOP, SOP8,.25	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.31.00.01	风险等级：	0.92
放大器类型：	INSTRUMENTATION AMPLIFIER	最大平均偏置电流 (IIB)：	0.01 µA
标称带宽 (3dB)：	0.08 MHz	最小共模抑制比：	83 dB
最大输入失调电流 (IIO)：	0.001 µA	最大输入失调电压：	190 µV
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e3
长度：	4.9 mm	湿度敏感等级：	1
负供电电压上限：	-18 V	标称负供电电压 (Vsup)：	-5 V
最大非线性：	0.001%	功能数量：	1
端子数量：	8	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装等效代码：	SOP8,.25
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	260	电源：	3/5/+-5/+-15 V
认证状态：	Not Qualified	座面最大高度：	1.75 mm
标称压摆率：	0.05 V/us	子类别：	Instrumentation Amplifier
供电电压上限：	18 V	标称供电电压 (Vsup)：	5 V
表面贴装：	YES	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	30	最大电压增益：	1000
最小电压增益：	5	标称电压增益：	10
宽度：	3.9 mm

AD627BRZ-RL 数据手册

AD627

Capacitor C3 is needed to maintain common-mode rejection at

low frequencies. R±/R2 and C±/C2 form a bridge circuit whose

output appears across the input pins of the in-amp. Any mismatch

between C± and C2 unbalances the bridge and reduces common-

mode rejection. C3 ensures that any RF signals are common

mode (the same on both in-amp inputsꢀ and are not applied

differentially. This second low-pass network, R± + R2 and C3,

has a −3 dB frequency equal to

INPUT PROTECTION

As shown in the simplified schematic (see Figure 35ꢀ, both the

inverting and noninverting inputs are clamped to the positive

and negative supplies by ESD diodes. In addition, a 2 kΩ series

resistor on each input provides current limiting in the event of

an overvoltage. These ESD diodes can tolerate a maximum

continuous current of ±0 mA. So an overvoltage (that is, the

amount by which the input voltage exceeds the supply voltageꢀ

of ±20 V can be tolerated. This is true for all gains, and for

power on and off. This last case is particularly important

because the signal source and amplifier can be powered

separately.

±/(2π((R± + R2ꢀ × C3ꢀꢀ

(1ꢀ

0.33µF

0.01µF

1000pF

20kΩ

If the overvoltage is expected to exceed 20 V, use additional

external series current-limiting resistors to keep the diode

current below ±0 mA.

+IN

–IN

20kΩ

AD627

OUT

0.022µF

RF INTERFERENCE

REFERENCE

0.01µF

1000pF

All instrumentation amplifiers can rectify high frequency out-

of-band signals. Once rectified, these signals appear as dc offset

errors at the output. The circuit in Figure 49 provides good RFI

suppression without reducing performance within the pass

band of the instrumentation amplifier. Resistor R± and

Capacitor C± (and likewise, R2 and C2ꢀ form a low-pass RC

filter that has a –3 dB BW equal to

0.33µF

–V

Figure 49. Circuit to Attenuate RF Interference

Using a C3 value of 0.022 μF, as shown in Figure 49, the −3 dB

signal bandwidth of this circuit is approximately 200 Hz. The

typical dc offset shift over frequency is less than ± mV and the

RF signal rejection of the circuit is better than 57 dB. To increase

the 3 dB signal bandwidth of this circuit, reduce the value of

Resistor R± and Resistor R2. The performance is similar to that

when using 20 kΩ resistors, except that the circuitry preceding

the in-amp must drive a lower impedance load.

f = ±/(2π(R1 × C1ꢀꢀ

(7ꢀ

Using the component values shown in Figure 49, this filter has

a –3 dB bandwidth of approximately 1 kHz. Resistor R± and

Resistor R2 were selected to be large enough to isolate the circuit

input from the capacitors but not large enough to significantly

increase circuit noise. To preserve common-mode rejection in

the amplifier pass band, Capacitor C± and Capacitor C2 must

be 5% mica units, or low cost 20% units can be tested and binned

to provide closely matched devices.

When building a circuit like that shown in Figure 49, use a PC

board with a ground plane on both sides. Make all component

leads as short as possible. Resistor R± and Resistor R2 can be

common ±% metal film units, but Capacitor C± and Capacitor C2

must be ±5% tolerance devices to avoid degrading the common-

mode rejection of the circuit. Either the traditional 5% silver mica

units or Panasonic ±2% PPS film capacitors are recommended.

Rev. D | Page 21 of 24

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AD627BRZ-RL 替代型号

型号	品牌	替代类型	描述	数据表
AD627BRZ-RL	ADI	当前型号	Micropower, Single- and Dual-Supply, Rail-to-Rail Instrumentation Amplifier
AD627BRZ	ADI	类似代替	Micropower, Single- and Dual-Supply, Rail-to-Rail Instrumentation Amplifier
AD620ARZ	ADI	类似代替	Low Cost Low Power Instrumentation Amplifier

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