LTC2358ILX-18#PBF

Analog To Digital Converters (ADC) Overview

The LTC2358ILX-18#PBF is an 18-bit, low-noise, octal simultaneous sampling successive approximation register (SAR) analog-to-digital converter. It features buffered differential inputs with a wide common mode range and picoamp leakage currents. Operating from a 5V digital supply and flexible high-voltage analog supplies, each channel supports independently configurable SoftSpan input ranges including ±10.24V, 0V to 10.24V, ±5.12V, and 0V to 5.12V. The device achieves 96.4dB SNR and ±3.5LSB INL at 200ksps per channel throughput.

Analog To Digital Converters (ADC) Feature Summary

• Octal 18-bit SAR ADC with simultaneous sampling at 200ksps per channel
• SoftSpan technology allowing per-channel programmable input ranges (±10.24V, 0V to 10.24V, etc.)
• Integrated reference and buffer with 128dB CMRR and rail-to-rail overdrive tolerance
• Pin-selectable SPI CMOS (1.8V to 5V) or LVDS serial interfaces

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific temperature grade suffix for the required operating range: ILX indicates –40°C to 85°C. Confirm package availability in LQFP-48 format. Ensure power supply rails match the specified VCC (7.5V to 38V) and VEE (–16.5V to 0V) requirements for proper operation.

Analog To Digital Converters (ADC) Selection Notes

Select this component when high channel count and simultaneous sampling are required. The ILX variant is suitable for industrial environments requiring –40°C to 85°C coverage. Consider the LVDS interface option if noise immunity is critical; otherwise, use the CMOS interface for simpler logic level compatibility.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC2358 family of SoftSpan ADCs. The 'I' suffix denotes the industrial temperature grade (–40°C to 85°C), while the '18' indicates 18-bit resolution. It shares the same pinout and core architecture as the C-grade (commercial) and H-grade (extended) variants.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitutes include the LTC2358CLX-18#PBF for commercial temperature range applications and the LTC2358HLX-18#PBF for extended temperature ranges. These parts are functionally identical except for their specified operating temperature limits.