ADAQ4224中文资料24-Bit, 2 MSPS, μModule Data Acquisition Solution数据手册ADI规格书

描述 Description

The ADAQ4224 is a μModule® precision data acquisition (DAQ)signal chain solution that reduces the development cycle of aprecision measurement system by transferring the signal chaindesign challenge of component selection, optimization, and layoutfrom the designer to the device. With a guaranteed maximum ±1.0 ppmINL and no missing codes at 24 bits, the ADAQ4224 achievesunparalleled precision performance from −40°C to +105°C.

Using system-in-package (SIP) technology, the ADAQ4224 combinesthe common signal processing blocks required in a dataacquisition solution in a small footprint, 14 mm × 9mm, 0.8 mmpitch, 178-ball CSP_BGA package.

The ADAQ4224 integrates the following:


A low noise, high-bandwidth programmable gain instrumentation amplifier (PGIA).
A second-order anti-aliasing filter.
A low-noise, low-distortion, high-bandwidth ADC driver.
A high precision 24-bit, 2 MSPS successive approximation register (SAR) ADC.
An electrically isolated, I2C compatible temperature sensor with excellent accuracy of ±1°C maximum.
A 1.8 V low dropout (LDO) regulator.
Performance critical passives.
The ADAQ4224 incorporates the critical passive components withsuperior matching and drift characteristics using Analog Devices,Inc., iPassive® technology to minimize temperature dependent errorsources and to offer optimized performance. Integrating the criticalpower supply and reference bypass capacitors reduce sensitivityto the system level board layout. Reducing the solution footprintenables addition of more functions within the system and hence thesmaller form factor instruments without sacrificing performance.

The system integration solves many design challenges while theμModule still provides the flexibility of a configurable PGIA to allowgain or attenuation adjustments, as well as supports the acquisitionof both single-ended and differential signals. The fast settling ofthe PGIA and ADC driver stage and no latency of the SAR ADCprovide a unique solution for high channel count, multiplexed signalchain architectures and control loop applications.

The digital features include Flexi-SPI serial peripheral interface(SPI), which allow data access via multiple SPI modes as wellas offset correction, gain adjustment, and averaging and reduceburden on the host processor. A wide data clocking window,multiple SDO lanes, and optional DDR data clocking reduce theserial clock frequency while operating at full speed of 2 MSPS andmake it easier to isolate the DAQ solution, which reduces powerdissipation and EMI. Echo clock mode and host clock mode of theADAQ4224 relax the timing requirements and simplify the use ofdigital isolators.

The Flexi-SPI, PGIA gain control and I2C-compatible temperaturesensor serial user interface is compatible with 1.2 V to 1.8 V, 2.5V, 3 V, or 5 V logic, using a separate VIO supply. The ADAQ4224operation is specified from −40°C to +105°C.

特性 Features

• High Performance
• INL: ±1 ppm maximum from −40 °C to 105 °C
• SNR: 106.5 dB typical, THD: −122 dB typical
• Gain error drift: +1.50 ppm/°C maximum
• Second-order, 270 kHz anti-aliasing filter
• Flexible external reference voltage: 4.096 V or 5 V
• Wide input common-mode voltage range: −8 V to +10 V
• High density solution reduces system footprint
• 4× footprint reduction vs. equivalent discrete solution
• Total power dissipation: 446 mW typical at 2 MSPS
• Flexi-SPI digital interface
• Echo clock mode simplifies use of digital isolator
• PGIA gain control (A0, A1) interface
• Overrange and synchronization bits

应用 Application

• Automatic test equipment
• Process controls
• Digital control loops