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LTC2335-18 - 18-Bit, 1Msps 8-Channel Differential ±10.24V Input SoftSpan ADC with Wide Input Common Mode Range

The LTC®2335-18 is an 18-bit, low noise 8-channel multiplexed successive approximation register (SAR) ADC with differential, wide common mode range inputs. Operating from a 5V low voltage supply, flexible high voltage supplies, and using the internal reference and buffer, this SoftSpanTM ADC can be configured on a conversion-by-conversion basis to accept ±10.24V, 0V to 10.24V, ±5.12V, or 0V to 5.12V signals on any channel. Alternately, the ADC may be programmed to cycle through a sequence of channels and ranges without further user intervention.

The wide input common mode range and 118dB CMRR of the LTC2335-18 analog inputs allow the ADC to directly digitize a variety of signals, simplifying signal chain design. This input signal flexibility, combined with ±3LSB INL, no missing codes at 18 bits, and 96.7dB SNR, makes the LTC2335-18 an ideal choice for many high voltage applications requiring wide dynamic range.

The LTC2335-18 supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces.

Features 1Msps Throughput ±3LSB INL (Maximum, ±10.24V Range) Guaranteed 18-Bit, No Missing Codes Differential, Wide Common Mode Range Inputs 8-Channel Multiplexer with SoftSpan Input Ranges: ±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V ±12.5V, 0V to 12.5V, ±6.25V, 0V to 6.25V 96.7dB Single-Conversion SNR (Typical) −109dB THD (Typical) at fIN = 2kHz 118dB CMRR, 125dB Active Crosstalk (Typical) Rail-to-Rail Input Overdrive Tolerance Programmable Sequencer with No-Latency Control Guaranteed Operation to 125°C Integrated Reference and Buffer (4.096V) SPI CMOS (1.8V to 5V) and LVDS Serial I/O No Pipeline Delay, No Cycle Latency 180mW Power Dissipation (Typical) 48-Lead (7mm × 7mm) LQFP Package Typical Application

Applications Programmable Logic Controllers Industrial Process Control Power Line Monitoring Test and Measurement Packaging

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