AD4190-4
推荐新设计使用24-Bit, 62.5kSPS, Multichannel, Low-Noise Precision Sigma-Delta ADC
- 产品模型
- 2
产品详情
- Input referred noise: 10nV at 3.8SPS, Gain = 128
- Crosspoint multiplexed analog inputs
- 4 Differential/8 Pseudodifferential inputs
- Ultra-low noise integrated PGA, gains of 0.5 to 128
- Output data rate: 3.8SPS to 62.5kSPS
- Flexible digital filters
- Low latency sinc filters
- Simultaneous 50Hz/60Hz rejection
- Band-gap reference with 5ppm/°C drift typical
- Internal oscillator
- Analog power supply: 4.75V to 5.25V or ±2.5V
- Digital power supply: 1.7V to 5.25V
- Matched programmable excitation current sources
- Low-side power switches
- Four general-purpose inputs/outputs
- On-chip bias voltage generator
- Internal temperature sensor
- Internal and system calibration
- Sensor burnout detection
- Diagnostic functions
- Per channel configuration
- Flexible automatic channel sequencer
- 3- or 4-wire serial interface (Schmitt trigger on SCLK)
- SPI, QSPI, MICROWIRE, and DSP compatible
- TDM compatible interface for data streaming
- Performance temperature range: −40°C to +105°C
- Functional temperature range: −40°C to +125°C
- Available in 32-lead 4mm x 6mm LFCSP package
The AD4190-4 is a low noise, completely integrated analog front end for high precision measurement applications. The device contains a low noise, 24-bit Σ-Δ analog-to-digital converter (ADC) and can be configured to have four differential or eight single-ended or pseudodifferential inputs. The on-chip low-noise gain stage ensures that signals of small amplitude can be interfaced directly to the ADC.
The AD4190-4 offers the highest degree of signal chain integration. The device contains an internal reference and accepts two external differential references, which can be internally buffered. Other key integrated features include:
- Programmable gain amplifier (PGA). Due to the programmable gain (0.5 to 128), the PGA allows direct interfacing to transducers with low output amplitudes such as resistive bridges, thermocouples, and resistance temperature detectors (RTDs).
- The PGA has a wide common-mode input range, which gives designers a greater margin for widely varying input common modes.
- Low drift, well matched precision current sources. Use the excitation current sources to excite 2-, 3-, and 4-wire RTDs or bridge type sensors. Excitation current output options include 10μA, 50μA, 100μA, 250μA, 500μA, 1mA, and 1.5mA. The currents can also be added if higher currents are required.
- Use the low-side power switch (PDSW) to power down bridge sensors between conversions.
- Voltage bias for thermocouples (the VBIAS source sets the common-mode voltage of a channel to (AVDD + AVSS)/2.
- The smart sequencer allows the conversion of each enabled preconfigured channel in a predetermined order, which allows a mix of transducer, system checks, and diagnostic measurements to be interleaved. The sequencer eliminates the need for repetitive serial interface communication with the device to change configuration. Configure the 16-channels in the sequence. Each of these channels selects from eight user-defined ADC setups that allow selection of gain, filter type, output data rate, buffering, and reference source.
Please see data sheet for the full description
APPLICATIONS
- Industrial process control: PLC/DCS modules
- Temperature measurement
- Pressure measurement
- Medical and scientific instrumentation
- Chromatography
- Environmental monitoring
- Electrical test and measurement
- Instrumentation
- Weigh scale
参考资料
数据手册 1
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| 产品型号 | 引脚/封装图-中文版 | 文档 | CAD 符号，脚注和 3D模型 |
|---|---|---|---|
| AD4190-4BCPZ | LFCSP:LEADFRM CHIP SCALE | ||
| AD4190-4BCPZ-RL7 | LFCSP:LEADFRM CHIP SCALE |
这是最新版本的数据手册
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