Analog DevicesADAQ23878BBCZ数据采集系统

The ADAQ23878 is a precision, high speed, μModule® data acquisition solution that reduces the development cycle of a precision measurement systems by transferring the design burden of component selection, optimization, and layout from the designer to the device.

Using System-in-Package (SIP) technology, the ADAQ23878 reduces end system component count by combining multiple common signal processing and conditioning blocks in a single device, including a low noise, fully differential ADC driver (FDA), a stable reference buffer, and a high speed, 18-bit, 15 MSPS successive approximation register (SAR) ADC.

The ADAQ23878 also incorporates the critical passive components with superior matching and drift characteristics using Analog Devices, Inc., iPassive® technology to minimize temperature dependent error sources and to offer optimized performance. The fast settling of the ADC driver stage and no latency of the SAR ADC provide a unique solution for high channel count multiplexed signal chain architectures and control loop applications.

The small footprint, 9 mm × 9 mm BGA package enables smaller form factor instruments without sacrificing performance. The system integration solves many design challenges while the device still provides the flexibility of a configurable ADC driver feedback loop to allow gain or attenuation adjustments, as well as fully differential or single-ended to differential input. A single 5 V supply operation is possible while achieving optimum performance from the device.

The ADAQ23878 features a serial low voltage differential signaling (LVDS) digital interface with one-lane or two-lane output modes, allowing the user to optimize the interface data rate for each application. The specified operation of the ADAQ23878 is from −40°C to +85°C.

Key Features and Benefits

• •  Integrated fully differential ADC driver with signal scaling
• •  Wide input common-mode voltage range
• •  High common-mode rejection
• •  Single-ended to differential conversion
• •  Pin selectable input range with overrange
• •  Input ranges with 4.096 V REFBUF: ±10 V, ±5 V, ±4.096 V, ±2.5 V, and ±1.5 V
• •  Gain/attenuation options: 0.37, 0.73, 0.87, 1.38, and 2.25
• •  Critical passive components
• •  0.005% precision matched resistor array for FDA
• •  9 mm × 9 mm, 0.8 mm pitch, 100-ball CSP_BGA package
• •  2.5× footprint reduction vs. discrete solution

Applications

• •  Automatic test equipment
• •  Data acquisition
• •  Hardware in the Loop (HiL)
• •  Power analyzers
• •  Non-destructive test (acoustic emissions)
• •  Mass spectrometry
• •  Travelling wave fault location
• •  Medical imaging and instruments

Evaluation Board

The ADAQ23878 can be evaluated with the EVAL-ADAQ23878

Block Diagrams and Tables