AD8251: 10 MHz、20 V/µs、G = 1、2、4、8、iCMOS®可编程增益仪表放大器 |
AD8251是一款具有数字式可编程增益的仪表放大器，拥有GΩ级输入阻抗、低输出噪声和低失真等特性，因此适合用来与传感器接口及驱动高采样速率模数转换器(ADC)。它拥有10 MHz带宽、−110 dB的低总谐波失真(THD)，以及达到0.001%精度时785 ns的快速建立时间(最大值)。保证的失调漂移和增益漂移分别为1.8 µV/°C和10 ppm/°C(G = 8)。除了输入共模电压范围很宽之外，该器件还拥有80 dB的高共模抑制能力(G = 1，直流至50 kHz)。精密直流性能与高速能力的结合则使AD8251成为数据采集应用的绝佳选择。此外，这款单芯片解决方案简化了设计与制造，并可通过内部电阻与放大器的严格匹配来提高仪器仪表的性能。
AD8251用户接口包含一个并行端口，用户可以采用以下两种不同的方式设置增益(功能框图请参见数据 ...More
AD8251是一款具有数字式可编程增益的仪表放大器，拥有GΩ级输入阻抗、低输出噪声和低失真等特性，因此适合用来与传感器接口及驱动高采样速率模数转换器(ADC)。它拥有10 MHz带宽、−110 dB的低总谐波失真(THD)，以及达到0.001%精度时785 ns的快速建立时间(最大值)。保证的失调漂移和增益漂移分别为1.8 µV/°C和10 ppm/°C(G = 8)。除了输入共模电压范围很宽之外，该器件还拥有80 dB的高共模抑制能力(G = 1，直流至50 kHz)。精密直流性能与高速能力的结合则使AD8251成为数据采集应用的绝佳选择。此外，这款单芯片解决方案简化了设计与制造，并可通过内部电阻与放大器的严格匹配来提高仪器仪表的性能。
AD8251用户接口包含一个并行端口，用户可以采用以下两种不同的方式设置增益(功能框图请参见数据手册中的图1)。一种方式是用WR输入锁存通过总线发送的2比特字。另一种方式是用透明增益模式，在这一模式下，由增益端口处的逻辑电平状态决定增益。
AD8251采用10引脚MSOP封装，额定温度范围为−40°C至+85°C，特别适合对尺寸和封装密度有严格要求的应用。
应用
数据手册, Rev. 0, 5/07
| Part# | Description | Single/Dual Supply | Vcc-Vee | Gain Setting Method | Bandwidth G=10 (kHz typ) | Gain min. | Gain max. | Min CMRR @ 60 Hz Min Gain | Min CMRR @ 60Hz Max Gain | Vnoise RTI 1-10 Hz µVp-p | Price* (1000-4999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AD522 | Military | Dual | 10V to 36V | Resistor | 30 | 1 | 1,000 | 75dB | 100dB | 4 | - |
| AD524 | Precision IA | Dual | 12V to 36V | Pin | 400 | 1 | 1,000 | 70dB | 110dB | 0.3 | $9.52 |
| AD526 | Software Programmable | Dual | 9V to 33V | Digital | 350 | 1 | 16 | - | - | 3 | $6.39 |
| AD620 | General Purpose IA | Dual | 4.6V to 36V | Resistor | 800 | 1 | 10,000 | 73dB | 110dB | 0.28 | $3.31 |
| AD621 | Precise Gain | Dual | 4.6V to 36V | Pin | 800 | 10 | 100 | 93dB | 110dB | 0.28 | $4.09 |
| AD622 | Low Cost IA | Dual | 5.2V to 36V | Resistor | 800 | 1 | 1,000 | 66dB | 103dB | 0.3 | $2.51 |
| AD623 | S.S R-R IA | Single/Dual | 2.7V to 12V | Resistor | 100 | 1 | 1,000 | 70dB | 105dB | 2 | $1.40 |
| AD624 | Precision IA | Dual | 12V to 36V | Pin | 150 | 1 | 1,000 | 70dB | 110dB | 0.3 | $15.87 |
| AD625 | Programmable Gain IA | Dual | 12V to 36V | Resistor | 400 | 1 | 10,000 | 70dB | 110dB | 0.3 | $8.78 |
| AD626 | Diff Amp | Single/Dual | 4.8V to 12V | Pin | 100 | 10 | 100 | 55dB | 55dB | 2 | $3.70 |
| AD627 | Micropower IA | Single/Dual | 2.2V to 36V | Resistor | 30 | 5 | 1,000 | 77dB | 77dB | 0.56 | $2.56 |
| AD628 | High CMV DA | Single/Dual | 4.5V to 36V | Pin, Resistor | 600 | 0.1 | 100 | 75dB | 75dB | 15 | $1.78 |
| AD629 | High CMV DA | Dual | 5V to 36V | fixed | 500 | 1 | 1 | 77dB | 77dB | 15 | $2.84 |
| AD8129 | Low Cost Diff Amp | Single/Dual | 4.5V to 25V | Resistor | 200000 | 10 | - | 94dB | - | - | $1.57 |
| AD8202 | High CMV DA | Single | 3.5V to 12V | fixed | 50 | - | - | 82dB | 82dB | 10 | $1.51 |
| AD8203 | High CMV DA | Single | 3.5V to 12V | fixed | 60 | - | - | 82dB | 82dB | 10 | $1.37 |
| AD8205 | S.S Diff Amp | Single | 4.5V to 5.5V | fixed | 50 | - | - | 78dB | 78dB | 20 | $1.51 |
| AD8206 | S.S Diff Amp | Single | 4.5V to 5.5V | fixed | 100 | - | - | 76dB | 76dB | 20 | $1.37 |
| AD8210 | Bi-Directional Shunt Mon | Single | 4.5V to 5.5V | fixed | 500 | 20 | 20 | 100dB | 100dB | 7 | $1.81 |
| AD8211 | High CMV Shunt Mon | Single | 4.5V to 5.5V | fixed | 500 | 20 | 20 | 100dB | 100dB | 7 | $0.81 |
| AD8212 | High CMV Shunt Mon | Single | 7V to 65V | Resistor | 1000 | 1 | 1,000 | 100dB | 100dB | 1.1 | $0.93 |
| AD8213 | Dual High CMV Shunt Mon | Single | 4.5V to 5.5V | fixed | 500 | 20 | 20 | 100dB | 100dB | 7 | $2.01 |
| AD8214 | High CMV Threshold Detec | Single | 5V to 65V | Resistor | - | 1 | 100 | 80dB | 80dB | 2.2 | $0.76 |
| AD8215 | High CMV Shunt Mon | Single | 4.5V to 5.5V | fixed | 450 | 20 | 20 | 100dB | 100dB | 7 | $1.21 |
| AD8216 | High BW 65 V Diff Amp | Single | 4.5V to 5.5V | fixed | 3000 | 3 | 3 | 80dB | 80dB | 20 | $1.62 |
| AD8220 | R-R JFET IA | Single/Dual | 4.6V to 36V | Resistor | 800 | 1 | 1,000 | 78dB | 94dB | 0.8 | $2.32 |
| AD8221 | High Performance IA | Dual | 4.6V to 36V | Resistor | 562 | 1 | 1,000 | 80dB | 130dB | 0.25 | $2.01 |
| AD8222 | Dual High Performance IA | Dual | - to - | Resistor | 750 | 1 | 1,000 | 80dB | 130dB | 0.25 | $3.63 |
| AD8223 | S.S R-R IA | Single/Dual | 3V to 24V | Pin | 125 | 5 | 1,000 | 80dB | 90dB | 0.6 | $1.05 |
| AD8224 | Dual JFET R-R IA | Single/Dual | 4.6V to 36V | Resistor | 800 | 1 | 1,000 | 78dB | 94dB | 0.8 | $4.17 |
| AD8225 | Fixed G=5 IA | Dual | 3.4V to 36V | fixed | 900 | 5 | 5 | 86dB | 86dB | 1.5 | $3.29 |
| AD8226 | Wide Supply R-R out IA | Single/Dual | 2.2V to 36V | Resistor | 160 | 1 | 1,000 | 80dB | 105dB | 0.4 | $1.40 |
| AD8227 | Wide Supply R-R out IA | Single/Dual | 2.2V to 36V | Resistor | 200 | 5 | 1,000 | 90dB | 105dB | 0.5 | $1.38 |
| AD8228 | Precise Gain | Dual | 4.6V to 36V | Pin | 650 | 10 | 100 | 100dB | 120dB | 0.5 | $3.03 |
| AD8230 | Zero Drift IA | Single/Dual | 8V to 16V | Resistor | 2 | 2 | 1,000 | 110dB | 110dB | 3 | $2.99 |
| AD8231 | Zero Drift Software Prog | Single | 3V to 6V | Digital, Pin, Software | 700 | 1 | 128 | 80dB | 110dB | 0.7 | $1.71 |
| AD8236 | Microwpower | Single | 1.8V to 5.5V | Resistor | 9 | 5 | 200 | 94dB | 110dB | 4 | $0.99 |
| AD8250 | Software Programmable | Dual | 10V to 34V | Digital, Pin | 3000 | 1 | 10 | 80dB | 98dB | 1 | $5.01 |
| AD8251 | Software Programmable | Dual | 10V to 34V | Digital, Pin | 2500 | 1 | 8 | 80dB | 98dB | 1.2 | $5.01 |
| AD8253 | Software Programmable | Dual | 10V to 34V | Digital, Pin | 4000 | 1 | 1,000 | 80dB | 100dB | 1 | $4.95 |
| AD8270 | Dual Diff Amp | Dual | 5V to 36V | Pin | - | 0.5 | 1.2 | 70dB | 80dB | 1 | $1.91 |
| AD8271 | - | - | 5V to 36V | - | - | 0.5 | 1.2 | - | - | - | $1.25 |
| AD8273 | Dual Audio Diff Amp | Dual | 5V to 36V | Pin | - | 0.5 | 2 | 77dB | - | 2 | $1.67 |
| AD8274 | Precision Diff Amp | Dual | 5V to 36V | - | 10000 | 0.5 | 2 | - | - | - | $1.05 |
| AD8275 | Level Shifting ACD Driver | Single | 3.3V to 15V | Resistor | - | - | - | 96dB | 96dB | - | $1.60 |
| AD8276 | - | Single/Dual | 2V to 36V | fixed | - | - | - | 86dB | - | - | $0.95 |
| AD8277 | - | - | 2V to 36V | - | - | - | - | - | - | - | $1.60 |
| AD8278 | - | - | 2V to 36V | - | - | - | - | - | - | - | $0.95 |
| AD8290 | Sensor Amp | Single | 2.6V to 5.5V | fixed | - | 50 | 50 | - | - | 0.75 | $1.52 |
| AD8293G160 | Zero Drift Filter Amp | Single | 1.8V to 5.5V | fixed | 0.5 | 160 | 160 | 94dB | 94dB | 0.7 | $0.99 |
| AD8293G80 | Zero Drift Filter Amp | Single | 1.8V to 5.5V | fixed | 0.5 | 80 | 80 | 94dB | 94dB | 0.7 | $0.99 |
| AD8295 | Precision IA | Dual | 4.6V to 36V | Resistor | 750 | 1 | 1,000 | 80dB | 130dB | 0.25 | $2.59 |
| AD8553 | Zero Drift IA | Single | 1.8V to 5.5V | Resistor | 1 | 0.1 | 10,000 | 80dB | 120dB | 0.7 | $1.32 |
| AD8555 | Sensor Amp | Single | 2.7V to 5.5V | Digital | n/a | 70 | 1,280 | 80dB | 96dB | 0.5 | $3.12 |
| AD8556 | Sen/Filter Amp | Single | 4.5V to 5.5V | Digital | n/a | 70 | 1,280 | 80dB | 94dB | 0.5 | $2.88 |
| AD8557 | Sensor Amp | Single | 2.7V to 5.5V | Digital | - | 28 | 1,300 | 75dB | 96dB | - | $2.13 |
| AMP03 | Precision Diff Amp | Dual | 12V to 36V | fixed | - | - | - | 85dB | 85dB | 2 | $2.81 |
