参数资料
| 型号： | AD627ARZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/25页 |
| 文件大小： | 0K |
| 描述： | IC AMP INST R-R 25MA 8SOIC |
| 产品培训模块： | Power Line Monitoring |
| 标准包装： | 2,500 |
| 放大器类型： | 仪表 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.06 V/µs |
| -3db带宽： | 80kHz |
| 电流 - 输入偏压： | 2nA |
| 电压 - 输入偏移： | 25µV |
| 电流 - 电源： | 60µA |
| 电流 - 输出 / 通道： | 25mA |
| 电压 - 电源，单路/双路(±)： | 2.2 V ~ 36 V，±1.1 V ~ 18 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： | 带卷 (TR) |
AD627
Data Sheet
Rev. E | Page 18 of 24
MAKE vs. BUY: A TYPICAL APPLICATION ERROR
BUDGET
The example in Figure 41 serves as a good comparison between
the errors associated with an integrated and a discrete in-amp
implementation. A ±100 mV signal from a resistive bridge
(common-mode voltage = 2.5 V) is amplified. This example
compares the resulting errors from a discrete two-op-amp
instrumentation amplifier and the AD627. The discrete
implementation uses a four-resistor precision network
(1% match, 50 ppm/°C tracking).
The errors associated with each implementation (see Table 9)
show the integrated in-amp to be more precise at both ambient
and overtemperature. Note that the discrete implementation is
more expensive, primarily due to the relatively high cost of the
low drift precision resistor network.
The input offset current of the discrete instrumentation amplifier
implementation is the difference in the bias currents of the two-
op amplifiers, not the offset currents of the individual op amps.
In addition, although the values of the resistor network are chosen
so that the inverting and noninverting inputs of each op amp
see the same impedance (about 350 ), the offset current of
each op amp adds another error that must be characterized.
VOUT
+2.5V
+5V
AD627A GAIN = 9.98 (5+(200k/RG))
HOMEBREW IN-AMP, G = +10
*1% RESISTOR MATCH, 50ppm/°C TRACKING
RG
40.2k
1%
+10ppm/°C
AD627A
+5V
350
3.15k*
350*
3.15k*
±100mV
1/2
LT10781SB
1/2
00782-
039
Figure 41. Make vs. Buy
Table 9. Make vs. Buy Error Budget
Error Source
AD627 Circuit Calculation
Homebrew Circuit Calculation
Total Error
(ppm)
Total Error
Homebrew
(ppm)
ABSOLUTE ACCURACY at TA = 25°C
Total RTI Offset Voltage, mV
(250 μV + (1000 μV/10))/100 mV
(180 μV × 2)/100 mV
3,500
3,600
Input Offset Current, nA
1 nA × 350 Ω/100 mV
20 nA × 350 Ω/100 mV
3.5
70
Internal Offset Current
(Homebrew Only)
Not applicable
0.7 nA × 350 Ω/100 mV
2.45
CMRR, dB
77 dB
→141 ppm × 2.5 V/100 mV (1% match × 2.5 V)/10/100 mV
3,531
25,000
Gain
0.35% + 1%
1% match
13,500
10,000
Total Absolute Error
20,535
38,672
DRIFT TO 85°C
Gain Drift, ppm/°C
(75 + 10) ppm/°C × 60°C
50 ppm/°C × 60°C
3,900
3,000
Total RTI Offset Voltage, mV/°C
(3.0 μV/°C + (10 μV/°C/10)) ×
60°C/100 mV
(2 × 3.5 μV/°C × 60°C)/100 mV
2,600
4,200
Input Offset Current, pA/°C
(16 pA/°C × 350 Ω × 60°C)/100 mV
(33 pA/°C × 350 Ω × 60°C)/100 mV
3.5
7
Total Drift Error
6,504
7,207
Grand Total Error
27,039
45,879
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD627B | 制造商:AD 制造商全称:Analog Devices 功能描述:Micropower, Single and Dual Supply Rail-to-Rail Instrumentation Amplifier |
| AD627BN | 制造商:Analog Devices 功能描述:SP Amp INSTR Amp Single R-R O/P ±18V/36V 8-Pin PDIP Tube 制造商:Rochester Electronics LLC 功能描述:PDIP UPOWER LOW COST INSTRUMENTATION AMP - Bulk |
| AD627BNZ | 功能描述:IC AMP INST R-R 25MA 8DIP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
| AD627BR | 功能描述:IC AMP INST R-R 25MA 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:J-FET 电路数:2 输出类型:- 转换速率:3.5 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:30pA 电压 - 输入偏移:2000µV 电流 - 电源:200µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-PDIP 包装:管件 |
| AD627BR-REEL | 功能描述:IC AMP INST R-R 25MA 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:J-FET 电路数:2 输出类型:- 转换速率:13 V/µs 增益带宽积:3MHz -3db带宽:- 电流 - 输入偏压:65pA 电压 - 输入偏移:3000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-PDIP 包装:管件 |
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