Analog Devices Inc. AD7761 Simultaneous Sampling ADC
Analog Devices AD7761 is offered an 8-channel, simultaneous sampling Σ-Δ analog-to-digital converter (ADC) with a Σ-Δ modulator and digital filter per channel. The ADC enables synchronized sampling of AC and DC signals. The AD7761 ADC delivers a 97.7dB dynamic range at a maximum input bandwidth of 110.8kHz, ±1LSB integral nonlinearity (INL), ±1LSB offset error, and ±5LSB gain error.
The AD7761 features three modes. The fast mode delivers a 256kSPS maximum output data rate per channel, 110.8kHz input bandwidth, and 51.5mW per channel. AD7761’s median mode has 128kSPS maximum output data rate per channel, 55.4kHz input bandwidth, and 27.5mW per channel. While the focus mode provides 32kSPS maximum output data rate per channel, 13.8kHz input bandwidth, and 9.375mW per channel. The AD7761’s extensive digital filtering capabilities include a wideband, low ±0.005dB pass-band ripple, anti-aliasing low-pass filter with sharp roll-off, and 105dB attenuation at the Nyquist frequency.
Features
- Precision AC and DC performance
- 8-channel simultaneous sampling
- 256kSPS ADC output data rate per channel
- 97.7dB dynamic range
- 110.8kHz input bandwidth (−3dB bandwidth (BW))
- –120dB THD, typical
- ±1LSB INL, ±1LSB offset error, ±5LSB gain error
- Optimized power dissipation vs. noise vs. input bandwidth
- Selectable power, speed, and input bandwidth
- Fast: highest speed; 110.8kHz BW, 51.5mW per channel
- Median: half-speed, 55.4kHz BW, 27.5mW per channel
- Focus: lowest power, 13.8kHz BW, 9.375mW per channel
- Input BW range: DC to 110.8kHz
- Programmable input bandwidth/sampling rates
- Cyclic redundancy check (CRC) error checking on data interface
- Daisy-chaining
- Linear phase digital filter
- Low latency sinc5 filter
- Wideband brick wall filter: ±0.005dB ripple to 102.4kHz
- Analog input precharge buffers
- Power supply
- AVDD1 = 5 V, AVDD2 = 2.25V to 5.0V
- IOVDD = 2.5V to 3.3 V or IOVDD = 1.8V
- 64-lead LQFP package, no exposed pad
- Temperature range: −40°C to +105°C
Applications
- Data acquisition systems: USB/PXI/Ethernet
- Instrumentation and industrial control loops
- Audio test and measurement
- Vibration and asset condition monitoring
- 3-phase power quality analysis
- Sonar
- High precision medical electroencephalogram (EEG)/ electromyography (EMG)/electrocardiogram (ECG)
Functional Block Diagram
Evaluation Boards
Analog Devices Inc. EVAL-SDP-CH1Z High-Speed Controller Board
High-speed controller board for the Analog Devices System Demonstration Platform (SDP).
Analog Devices EVAL-AD7761FMCZ Evaluation Board helps designers evaluate the features and capabilities of the AD7761 Simultaneous Sampling ADCs.