ADAQ7768-1/ADAQ7767-1: 24-Bit Single Channel Precision μModule Data Acquisition System
Analog Devices18 Oct 2024
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 ADAQ7768-1/ADAQ7767 can be evaluated with the EVAL-ADAQ7768-1 or the EVAL-ADMX1001.
Article Tags
Analog Devices
ADI Electronics
