Analog Devices Inc. AD4855 8-Ch Data Acquisition System (DAS)
Analog Devices AD4855 8-Ch Data Acquisition System (DAS) combines a 5V low-voltage supply, flexible input buffer supplies, and differential, wide common-mode range inputs. The fully buffered, 8-channel simultaneous sampling, 16-bit, 250kSPS DAS enables the SoftSpan range of each channel to be independently configured to match the native application signal swing, reducing additional external signal conditioning. The AD4855 integrates seamless high dynamic range (SHDR) technology to further maximize the single-conversion dynamic range. When enabled, the input signal path gain of the channel is automatically optimized on a sample-by-sample basis, minimizing converter noise on each sample without impacting linearity.
The ADI AD4855 DAS incorporates all critical power supply and reference bypass capacitors into a 7.00mm x 7.00mm, 64-ball, ball grid array (BGA) package. The device's complete solution footprint and component count are minimized, and sensitivity to application printed circuit board (PCB) layout is reduced. The AD4855 functions over an extended industrial temperature range of −40°C to +125°C.
Features
- Complete 16-bit data acquisition system
- Simultaneous sampling of 8 internally buffered channels
- 250kSPS per channel throughput
- Differential, wide common-mode range inputs
- ±75pA typical input leakage at 25°C
- Full-scale input step settling time <300ns
- Integrated reference and reference buffer (4.096V)
- Integrated supply decoupling capacitors
- 27mW per channel at 250kSPS, scales with throughput
- Seamless high dynamic range
- Per sample, per channel automatic gain ranging
- Maintains ppm-level INL
- Per channel SoftSpan input ranges, bipolar or unipolar
- ±40V, ±25V, ±20V, ±12.5V, ±10V, ±6.25V, ±5V, ±2.5V
- 0V to 40V, 25V, 20V, 12.5V, 10V, 6.25V, 5V, 2.5V
- Minimal external signal conditioning
- Rail-to-rail input overdrive tolerance
- High performance
- ±160μV typical (±40V range) INL
- 94.6dB single-conversion typical (±40V range) SNR
- 98.1dB single-conversion typical (±40V range) DR
- -117dB typical (±40V range) THD
- 120dB typical CMRR
- Digital flexibility
- SPI CMOS (0.9V to 5.25V) and LVDS serial input and output
- Optional oversampling with 16-bit digital averaging
- Optional offset, gain, and phase correction
- 7.00mm x 7.00mm, 64-ball BGA full solution footprint
Applications
- Automatic test equipment
- Avionics and aerospace
- Instrumentation and control systems
- Semiconductor manufacturing
- Test and measurement
Functional Block Diagram
Publicado: 2024-10-22
| Actualizado: 2024-11-06