Analog DevicesADAQ7768-1BBCZ数据采集系统

ADAQ7768-1/ADAQ7767-1: 24-Bit Single Channel Precision μModule Data Acquisition System

The ADAQ7768-1 is a 24-bit precision data acquisition (DAQ) μModule® system that encapsulates signal conditioning, conversion, and processing blocks into one system-in-package (SiP) design for the rapid development of highly compact, high-performance precision DAQ systems.

The ADAQ7768-1 consists of:

• •  A low-noise, low-bias current, high-bandwidth programmablegain instrumentation amplifier (PGIA) also capable of signal amplification and signal attenuation while maintaining high input impedance.
• •  A fourth-order, low-noise, linear phase anti-aliasing filter.
• •  A low-noise, low-distortion, high-bandwidth ADC driver plus an optional linearity boost buffer.
• •  A high-performance medium bandwidth 24-bit Σ-Δ ADC with programmable digital filter.
• •  A low-noise, low-dropout linear regulator.
• •  Reference buffers.
• •  Critical passive components required for the signal chain.

Key Features and Benefits

• •  Highly-integrated data acquisition solution
• •  Seven programmable-gain options
• •  G = 0.325, 0.65, 1.3, 2.6, 5.2, 10.4, 20.8 V/V
• •  Maximum input range of ±12.6 V differential
• •  Maximum input common-mode range of -12 V to +12 V
• •  Fourth-order AAF with maximum flatness and linear phase
• •  Full aliasing protection with 100 dB typical rejection
• •  Excellent device-to-device phase matching and drift
• •  Combined precision AC and DC performance:
• •  Total system dynamic range up to 130 dB
• •  −120 dB typical THD at 0.325 V/V gain
• •  100 dB minimum DC CMRR at 20.8 V/V gain
• •  25 pA maximum input bias current at 25°C
• •  ±6 ppm typical INL
• •  5.5 ppm/°C maximum gain error drift
• •  ±0.13° maximum device-to-device phase mismatch at 20 kHz
• •  Programmable output data rate, filter type, and latency
• •  Linear phase digital filter options:
• •  Wideband low-ripple FIR filter (110 kHz maximum input bandwidth)
• •  Sinc5 filter (1.024 MSPS, 198.4 kHz maximum input bandwidth, 4 μs maximum group delay)
• •  Sinc3 filter (50 Hz/60 Hz rejection)
• •  Integrated LDO
• •  Built-in supply decoupling capacitors
• •  Configuration through pin strapping or SPI
• •  Digital interface optimized for isolated applications
• •  Suite of diagnostic check mechanisms
• •  Operating temperature range: −40°C to +85°C
• •  Packaging: 12.00 mm × 6.00 mm 84-ball CSP_BGA with an 0.80 mm ball pitch
• •  10× footprint reduction vs. discrete solution

Applications

• •  Universal input measurement platform
• •  Electrical test and measurement
• •  Sound and vibration, acoustic and material science research and development
• •  Control and hardware in loop verification
• •  Condition monitoring for predictive maintenance
• •  Audio test

Evaluation Board

The EVAL-ADAQ7768-1 can be evaluated with the EVAL-AD4080-FMC.

Block Diagrams and Tables