Analog Devices Inc. AD4858 20-Bit 1MSPS Data Acquisition System (DAS)
Analog Devices Inc. AD4858 20-Bit 1MSPS Data Acquisition System (DAS) is a fully buffered, 8-channel simultaneous sampling DAS with differential, wide common-mode range inputs. Operating from a 5V low voltage supply, flexible input buffer supplies, and using the precision low drift internal reference and reference buffer, the AD4858 allows the SoftSpan range of each channel to be independently configured to match the native application signal swing, minimizing additional external signal conditioning. To further maximize the single-conversion dynamic range, the AD4858 incorporates seamless high dynamic range (SHDR) technology. 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 AD4858 device is ideal for applications requiring high accuracy, throughput, and precision in a compact solution footprint. Analog Devices Inc. AD4858 DAS offers a 7mm x 7mm, 64-ball, ball grid array (BGA) package and includes all critical power supply and reference bypass capacitors. This design reduces the full solution footprint and component count and minimizes sensitivity to application printed circuit board (PCB) layout. The DAS operates over an extended industrial temperature range of -40°C to +125°C.
Features
- Complete 20-bit data acquisition system
- Simultaneous sampling of eight internally buffered channels
- 1MSPS 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
- 45mW per channel at 1MSPS, power scales with throughput
- Minimal external signal conditioning
- 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
- Rail-to-rail input overdrive tolerance
- High performance
- INL: ±160μV typical (±40V range)
- SNR: 97.2dB single-conversion typical (±40V range)
- DR: 111.4dB single-conversion typical (±40V range)
- THD: −117dB typical (±40V range)
- CMRR: 120dB typical
- Digital flexibility
- SPI CMOS (0.9V to 5.25V) and LVDS serial input and output
- Optional oversampling with 24-bit digital averaging
- Optional offset, gain, and phase correction
- 7mm x 7mm, 64-ball BGA full solution footprint
Applications
- Automatic test equipment
- Avionics and aerospace
- Instrumentation and control systems
- Semiconductor manufacturing
- Test and measurement
Videos
Functional Block Diagram
Development Tool
Analog Devices Inc. EVAL-AD4858FMCZ DAS Evaluation Board
Demonstrates the performance of the AD4858, a fully buffered, 8-channel, 20-bit, 1 MSPS DAS.
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