LTC2353HLX-18#PBF

LTC2353HLX-18#PBF is an 18bit, low noise 2-channel simultaneous sampling successive approximation register (SAR) ADC with buffered differential, wide common mode range picoamp inputs. The integrated picoamp-input analogue buffers, wide input common mode range, and 124dB CMRR of the device allow the ADC to directly digitize a variety of signals using minimal board space and power. This input signal flexibility, combined with ±3.5LSB INL, no missing codes at 18 bits, and 96.4dB SNR, makes the device an ideal choice for many high-voltage applications requiring wide dynamic range. It supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces. Either one or two lanes of data output may be employed in CMOS mode, allowing the user to optimize bus width and throughput. Applications include programmable logic controllers, industrial process control, power line monitoring, test and measurement.

• Simultaneous sampling of 2 buffered channels, guaranteed 18bit, no missing codes
• Differential, wide common mode range inputs, rail-to-rail input overdrive tolerance
• Integrated reference and buffer (4.096V), SPI CMOS (1.8V to 5V) and LVDS serial I/O
• Internal conversion clock, no cycle latency, 550ksps per channel throughput
• Integral linearity error is ±1LSB typical at (SoftSpans 7 and 6: ±10.24V and ±10V ranges)
• Signal-to-noise ratio is 96.4MHz typ at (SoftSpans 7 and 6: ±10.24V and ±10V ranges, fIN = 2KHz)
• Total harmonic distortion is -110dB typ at (SoftSpans 7 and 6: ±10.24V and ±10V ranges, fIN = 2KHz)
• 6MHz typical -3dB input bandwidth at (TA = 25°C, AIN = -1dBFS)
• Supply current is 3.2mA typical at (550ksps sample rate, 2 channels enabled)
• Operating temperature range from -40°C to 125°C, 48-lead plastic LQFP package

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