AD7890: LC 2 MOS、8通道、12位串行数据采集系统
AD7890是一款8通道、12位数据采集系统,内置一个输入多路复用器、一个片内采样保持放大器、一个12位高速ADC、一个2.5 V基准电压源和一个高速串行接口,采用5 V单电源供电,可接受的模拟输入范围为± 10 V (AD7890-10)、0 V至4.096 V (AD7890-4)和0 V至2.5 V (AD7890-2)。该器件的多路复用器可独立访问,这样在必要时,用户可在多路复用器和ADC之间插入抗混叠滤波器或进行信号调理,即所有8个通道可以共用一个抗混叠滤波器。通过连接一个外部电容,用户可以调整指定的多路复用器建立时间,以便包括滤波器或信号调理电路中的所有外部延迟。AD7890通过一个高速双向串行接口端口输出数据。该器件内置一个片内控制寄存器,用户可以通过串行端口控制通道选择、转换启动和省电模式。多功能、高速逻辑可确保该器件与微控制器和数字信号处理器上的串行端口实现轻松接口。除线性度、满量程和失调误差等传统直流精度规格外,AD7890的动态性能参数也做了详细规定,包括谐波失真和信噪比。该器件在正常模式下的功耗很低,典型值为30 mW。如果不需要执行转换,可将其置于待机(省电)模式。AD7890采用ADI公司的线性兼容CMOS (LC 2MOS)工艺制造,这是一种将精密的双极性电路与低功耗CMOS逻辑结合在一起的混合工艺技术。该器件提供两种封装:24引脚、0.3英寸宽、塑料或陶瓷双列直插式封装和24引脚小形集成封装(SOIC_W)。
The AD7890 is an 8-channel 12-bit data acquisition system. The part contains an input multiplexer, an on-chip track/hold amplifier, a high speed 12-bit ADC, a 2.5 V reference, and a high speed, serial interface. The part operates from a single 5 V supply and accepts an analog input range of ±10 V (AD7890-10), 0 V to 4.096 V (AD7890-4), and 0 V to 2.5 V (AD7890-2).The multiplexer on the part is independently accessible. This allows the user to insert an antialiasing filter or signal conditioning, if required, between the multiplexer and the ADC. This means that one antialiasing filter can be used for all eight channels. Connection of an external capacitor allows the user to adjust the time given to the multiplexer settling to include any external delays in the filter or signal conditioning circuitry.Output data from the AD7890 is provided via a high speed bidirectional serial interface port. The part contains an on-chip control register, allowing control of channel selection, conversion start, and power-down via the serial port. Versatile, high speed logic ensures easy interfacing to serial ports on microcontrollers and digital signal processors.In addition to the traditional dc accuracy specifications such as linearity, full-scale, and offset errors, the AD7890 is also specified for dynamic performance parameters including harmonic distortion and signal-to-noise ratio.Power dissipation in normal mode is low at 30 mW typical and the part can be placed in a standby (power-down) mode if it is not required to perform conversions. The AD7890 is fabricated in Analog Devices, Inc.'s Linear Compatible CMOS (LC2MOS) process, a mixed technology process that combines precision bipolar circuits with low power CMOS logic. The part is available in a 24-lead, 0.3" wide, plastic or ceramic dual-in-line package or in a 24-lead small outline package (SOIC_W).
AD7890 特性
- 快速12位ADC,转换时间为5.9 微秒
- 8个单端模拟输入通道
- 输入范围选择:
± 10 V(AD7890-10)
0 V至4.096 V(AD7890-4)
0 V至2.5 V(AD7890-2)
- 可以分别独立访问多路复用器和ADC
- 片内采样保持放大器
- 片内基准电压源
- 高速、灵活的串行接口
- 单电源供电、低功耗(最大值50 mW)
- 省电模式(典型值75 µ W)
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- Fast 12-bit ADC with 5.9 µs conversion time
- Eight single-ended analog input channels
- Selection of input ranges:
±10 V for AD7890-10
0 V to 4.096 V for AD7890-4
0 V to 2.5 V for AD7890-2
- Allows separate access to multiplexer and ADC
- On-chip track/hold amplifier
- On-chip reference
- High-speed, flexible, serial interface
- Single supply, low-power operation (50 mW max)
- Power-down mode (75 µW typ)
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AD7890 亮点
- 完整的12位数据采集系统芯片(SoC)。AD7890是完整的单芯片ADC,它将一个8通道多路复用器、12位ADC、2.5 V基准电压源和一个采样保持放大器集成在单芯片上。
- 可以分别独立访问多路复用器和ADC。AD7890允许独立访问多路复用器的输出,因此8个通道可以共用一个抗混叠滤波器。如果多路复用器在内部与ADC相连,则需要8个抗混叠滤波器。二者相比,前者明显节省成本。
- 高速串行接口。该器件提供高速串行接口,可与微处理器和数字信号处理器的串行端口轻松相连。
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AD7890 技术指标
- Fast 12-bit ADC with 5.9 µs conversion time
- Eight single-ended analog input channels
- Selection of input ranges:
±10 V for AD7890-10
0 V to 4.096 V for AD7890-4
0 V to 2.5 V for AD7890-2
- Allows separate access to multiplexer and ADC
- On-chip track/hold amplifier
- On-chip reference
- High-speed, flexible, serial interface
- Single supply, low-power operation (50 mW max)
- Power-down mode (75 µW typ)
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AD7890 芯片订购指南
产品型号 |
封装 |
引脚 |
温度范围 |
包装和数量 |
报价*(100-499) |
报价*1000 pcs |
AD7890ACHIPS-10 产品状态: 停产 |
CHIPS OR DIE |
- |
工业 |
Tray, 45 |
- |
- |
AD7890ACHIPS-2 产品状态: 量产 |
CHIPS OR DIE |
- |
工业 |
Tray, 45 |
$ 12.14 |
$ 12.14 |
AD7890AN-10 产品状态: 量产 |
24 ld PDIP |
24 |
工业 |
Tube, 15 |
$ 15.93 |
$ 13.55 |
AD7890AN-2 产品状态: 量产 |
24 ld PDIP |
24 |
工业 |
Tube, 15 |
$ 15.93 |
$ 13.55 |
AD7890ANZ-10 产品状态: 量产 |
24 ld PDIP |
24 |
工业 |
Tube, 15 |
$ 13.14 |
$ 11.17 |
AD7890ANZ-2 产品状态: 量产 |
24 ld PDIP |
24 |
工业 |
Tube, 15 |
$ 13.80 |
$ 11.73 |
AD7890ANZ-4 产品状态: 量产 |
24 ld PDIP |
24 |
工业 |
Tube, 15 |
$ 13.80 |
$ 11.73 |
AD7890AR-10 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Tube, 31 |
$ 14.03 |
$ 11.92 |
AD7890AR-10REEL 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Reel, 1000 |
- |
$ 11.92 |
AD7890AR-2 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Tube, 31 |
$ 14.03 |
$ 11.92 |
AD7890AR-4 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Tube, 31 |
$ 14.73 |
$ 12.52 |
AD7890AR-4REEL 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Reel, 1000 |
- |
$ 12.52 |
AD7890ARZ-10 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Tube, 31 |
$ 12.14 |
$ 10.32 |
AD7890ARZ-10REEL 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Reel, 1000 |
- |
$ 10.32 |
AD7890ARZ-2 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Tube, 31 |
$ 12.14 |
$ 10.32 |
AD7890ARZ-2REEL 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Reel, 1000 |
- |
$ 10.32 |
AD7890ARZ-4 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Tube, 31 |
$ 12.75 |
$ 10.84 |
AD7890ARZ-4REEL 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Reel, 1000 |
- |
$ 10.84 |
AD7890BN-10 产品状态: 量产 |
24 ld PDIP |
24 |
工业 |
Tube, 15 |
$ 20.97 |
$ 17.82 |
AD7890BNZ-10 产品状态: 量产 |
24 ld PDIP |
24 |
工业 |
Tube, 15 |
$ 18.15 |
$ 15.44 |
AD7890BNZ-2 产品状态: 量产 |
24 ld PDIP |
24 |
工业 |
Tube, 15 |
$ 18.15 |
$ 15.44 |
AD7890BNZ-4 产品状态: 量产 |
24 ld PDIP |
24 |
工业 |
Tube, 15 |
$ 18.15 |
$ 15.44 |
AD7890BR-10 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Tube, 31 |
$ 18.47 |
$ 15.70 |
AD7890BR-10REEL 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Reel, 1000 |
- |
$ 15.70 |
AD7890BR-4 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Tube, 31 |
$ 19.39 |
$ 16.49 |
AD7890BRZ-10 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Tube, 31 |
$ 16.79 |
$ 14.27 |
AD7890BRZ-10REEL 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Reel, 1000 |
- |
$ 14.27 |
AD7890BRZ-2 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Tube, 31 |
$ 16.79 |
$ 14.27 |
AD7890BRZ-2REEL 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Reel, 1000 |
- |
$ 14.27 |
AD7890BRZ-4 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Tube, 31 |
$ 16.79 |
$ 14.27 |
AD7890BRZ-4REEL 产品状态: 量产 |
24 ld SOIC - Wide |
24 |
工业 |
Reel, 1000 |
- |
$ 14.27 |
AD7890SQ-10 产品状态: 量产 |
CERDIP GLASS SEAL |
24 |
军用 |
Tube, 15 |
$ 65.01 |
$ 55.25 |
AD7890SQ-2 产品状态: 量产 |
CERDIP GLASS SEAL |
24 |
军用 |
Tube, 15 |
$ 65.01 |
$ 55.25 |
AD7890SQ-4 产品状态: 量产 |
CERDIP GLASS SEAL |
24 |
军用 |
Tube, 15 |
$ 68.26 |
$ 58.01 |
AD7890 应用技术支持与电子电路设计开发资源下载
- AD7890 数据手册DataSheet下载 . pdf
- Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
- ADC模数转换器选型指南 . pdf