AD4853BBCZ

The AD4853 is a fully buffered, 4-channel simultaneous sampling, 16-bit, 1MSPS data acquisition system with differential, wide common-mode range inputs. The device operates from a 5V low-voltage supply with a flexible input buffer supply, and uses a precision low-drift internal reference and reference buffer, allowing the soft span range of each channel to be independently configured to match the application signal swing, minimizing additional external signal conditioning. To further maximize single-conversion dynamic range, the AD4853 integrates seamless high dynamic range technology. When enabled, the input signal path gain of a channel is automatically optimized on a sample-by-sample basis to minimize converter noise on each sample without compromising linearity. With an 11MHz bandwidth, picoampere-level input analog buffer, wide input common-mode range, and 120dB CMRR, the AD4853 allows the DAS to directly digitize input signals with arbitrary swing on INx+ and INx−. Its input signal flexibility, combined with ±160μV INL, 16-bit no missing codes, 94.6dB SNR, and 98.1dB dynamic range, makes the AD4853 an ideal choice for applications requiring high accuracy, high throughput, and high precision in a compact solution footprint. Enabling 16-bit oversampling provides further SNR and dynamic range improvements. Optional per-channel offset, gain, and phase adjustment provide the ability to calibrate and cancel system-level errors upstream of the DAS. The AD4853 features an SPI register configuration bus and supports LVDS and CMOS conversion data output buses, selectable via the LVDS/CMOS pin. In CMOS mode, one to four data output lines can be used, allowing users to optimize bus width and throughput.

Applications

• Automatic test equipment
• Instrumentation & control systems
• Semiconductor manufacturing
• Test & measurement

Key features

• Complete 16-bit data acquisition system
• Synchronous sampling with 4 internal buffered channels
• 1MSPS throughput per channel
• Differential, wide common-mode range input
• Typical input leakage current ±75pA at 25℃
• Full-scale input step settling time < 300ns
• Integrated voltage reference and reference buffer
• Integrated power supply decoupling capacitors
• 57mW power consumption per channel at 1MSPS, scales with throughput
• Minimal external signal conditioning
• Seamless high dynamic range
• Automatic gain ranging per sample, per channel
• Maintains ppm-level INL
• Per-channel software-selectable input range, bipolar or unipolar
• Bipolar ranges: ±40V, ±25V, ±20V, ±12.5V, ±10V, ±6.25V, ±5V, ±2.5V
• Unipolar ranges: 0V to 40V, 25V, 20V, 12.5V, 10V, 6.25V, 5V, 2.5V
• Rail-to-rail input overload tolerance
• High performance
• INL: typical ±160μV
• SNR: typical 94.6dB single conversion
• DR: typical 98.1dB single conversion
• THD: typical -117dB
• CMRR: typical 120dB
• Digital flexibility
• SPI CMOS and LVDS serial input and output
• Optional oversampling with 16-bit digital averaging
• Optional offset, gain, and phase correction
• Compact 7.00mm × 7.00mm, 64-ball BGA complete solution footprint