参数资料
| 型号： | AD623AR |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/24页 |
| 文件大小： | 0K |
| 描述： | IC AMP INST R-R LP 8SOIC |
| 标准包装： | 98 |
| 放大器类型： | 仪表 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.3 V/µs |
| -3db带宽： | 800kHz |
| 电流 - 输入偏压： | 17nA |
| 电压 - 输入偏移： | 25µV |
| 电流 - 电源： | 375µA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 12 V，± 2.5 V ~ 6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 管件 |
AD623
Rev. D | Page 15 of 24
THEORY OF OPERATION
The AD623 is an instrumentation amplifier based on a modified
classic 3-op-amp approach, to assure single or dual supply
operation even at common-mode voltages at the negative
supply rail. Low voltage offsets, input and output, as well as
absolute gain accuracy, and one external resistor to set the
gain, make the AD623 one of the most versatile instrumentation
amplifiers in its class.
The input signal is applied to PNP transistors acting as voltage
buffers and providing a common-mode signal to the input
amplifiers (see Figure 41). An absolute value 50 kΩ resistor in
each amplifier feedback assures gain programmability.
The differential output is
C
G
O
V
R
V
+
=
kΩ
100
1
The differential voltage is then converted to a single-ended
voltage using the output amplifier, which also rejects any
common-mode signal at the output of the input amplifiers.
Because the amplifiers can swing to either supply rail, as well as
have their common-mode range extended to below the negative
supply rail, the range over which the AD623 can operate is further
The output voltage at Pin 6 is measured with respect to the
potential at Pin 5. The impedance of the reference pin is 100 kΩ;
therefore, in applications requiring V/I conversion, a small
resistor between Pin 5 and Pin 6 is all that is needed.
POSITIVE SUPPLY
7
4
INVERTING
2
7
4
NEGATIVE SUPPLY
NONINVERTING
3
50k
OTUPUT
6
REF
5
8
1
GAIN
00
77
8-
04
1
Figure 41. Simplified Schematic
Note that the bandwidth of the in-amp decreases as gain is
increased. This occurs because the internal op-amps are the
standard voltage feedback design. At unity gain, the output
amplifier limits the bandwidth.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD623AR | 制造商:Analog Devices 功能描述:SEMICONDUCTORS |
| AD623ARM | 制造商:Analog Devices 功能描述:SP Amp INSTR Amp Single R-R O/P 制造商:Analog Devices 功能描述:IC AMP INSTRUMENTATION |
| AD623ARM-REEL | 制造商:Analog Devices 功能描述:SP Amp INSTR Amp Single R-R O/P |
| AD623ARM-REEL7 | 制造商:Analog Devices 功能描述:SP Amp INSTR Amp Single R-R O/P |
| AD623ARMZ | 功能描述:IC AMP INST R-R LP 8MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 产品培训模块:Differential Circuit Design Techniques for Communication Applications 标准包装:1 系列:- 放大器类型:RF/IF 差分 电路数:1 输出类型:差分 转换速率:9800 V/µs 增益带宽积:- -3db带宽:2.9GHz 电流 - 输入偏压:3µA 电压 - 输入偏移:- 电流 - 电源:40mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):3 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VQFN 裸露焊盘，CSP 供应商设备封装:16-LFCSP-VQ 包装:剪切带 (CT) 产品目录页面:551 (CN2011-ZH PDF) 其它名称:ADL5561ACPZ-R7CT |
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