ANALOG DEVICES LTC2357CLX-18#PBF Analogue to Digital Converter, 18 bit, 350 kSPS, Differential, Pseudo Differential, Single Ended

LTC2357CLX-18#PBF is an 18bit, low noise 4-channel simultaneous sampling successive approximation register (SAR) ADC with buffered differential, wide common mode range picoamp inputs. Operating from a 5V low voltage supply, flexible high voltage supplies, and using the internal reference and buffer, each channel of this SoftSpan� ADC can be independently configured on a conversion-by-conversion basis to accept ±10.24V, 0V to 10.24V, ±5.12V, or 0V to 5.12V signals. Individual channels may also be disabled to increase throughput on the remaining channels. The integrated picoamp-input analogue buffers, wide input common mode range and 128dB CMRR of the device allow the ADC to directly digitize a variety of signals using minimal board space and power. Applications include programmable logic controllers, industrial process control, power line monitoring, test and measurement.

• Simultaneous sampling of 4 buffered channels, rail-to-rail input overdrive tolerance
• Guaranteed 18bit, no missing codes, integrated reference and buffer (4.096V)
• SPI CMOS (1.8V to 5V) and LVDS serial I/O, internal conversion clock, no cycle latency
• Signal-to-noise ratio is 96.4dB 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)
• Input common mode rejection ratio is 128dB typ at (TA = 25°C)
• Integral linearity error is ±1LSB typ at (SoftSpans 7 and 6: ±10.24V and ±10V ranges)
• Aperture jitter is 3psRMS typ at (TA = 25°C, AIN = �1dBFS)
• Operating temperature range from 0°C to 70°C, 48-lead plastic LQFP package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party