ANALOG DEVICES LTC2345IUK-18#PBF Analogue to Digital Converter, 18 bit, 200 kSPS, Differential, SPI, Single, 4.75 V

LTC2345IUK-18#PBF is an 18bit, low noise 8-channel simultaneous sampling successive approximation register (SAR) ADC with differential, wide common mode range inputs. The wide input common mode range and 102dB CMRR of the LTC2345-18 analogue inputs allow the ADC to directly digitize a variety of signals, simplifying signal chain design. This input signal flexibility, combined with ±5LSB INL, no missing codes at 18 bits, and 91.8dB SNR, makes the LTC2345-18 an ideal choice for many applications requiring wide dynamic range. The LTC2345-18 supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces. Between one and eight 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, medical imaging, high speed data acquisition.

• Internal conversion clock, no cycle latency
• Rail-to-rail input overdrive tolerance
• Guaranteed 18bit, no missing codes
• Differential linearity error is ±0.5LSB typical
• Signal-to-noise ratio is 91.8dB typ at (SoftSpans 7 and 6: ±4.096V and ±4V ranges, fIN = 2KHz)
• Total harmonic distortion is -103dB typ at (SoftSpans 7 and 6: ±4.096V and ±4V ranges, fIN = 2KHz)
• 31MHz typ -3dB input bandwidth at (TA = 25°C)
• Input common mode rejection ratio is 103dB typ at (VIN+ = VIN? = 3.6VP-P 200Hz sine)
• Operating temperature range from -40°C to 85°C, 48-lead plastic QFN package

Notes

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