LTC1598LIG#PBF

Analog To Digital Converters (ADC) Overview

The LTC1598LIG#PBF is a micropower, 12-bit sampling analog-to-digital converter (ADC) featuring an 8-channel multiplexer. It operates on a single 3V supply (2.7V to 3.6V) and typically draws 160μA during conversion, automatically powering down to 1nA between conversions. The device utilizes a switched-capacitor successive approximation architecture with a maximum sampling rate of 10.5ksps at 200kHz clock frequency. It provides a serial interface compatible with QSPI, SPI, and MICROWIRE protocols. The component is housed in a 24-lead plastic SSOP package and is specified for the industrial temperature range of –40°C to 85°C.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with guaranteed ±3/4LSB maximum differential nonlinearity (DNL) and no missing codes.
• 8-channel analog multiplexer with separate MUXOUT and ADCIN pins for flexible signal conditioning.
• Micropower consumption: 160μA typical during operation, dropping to 1nA in auto-shutdown mode.
• Serial I/O compatible with QSPI, SPI, and MICROWIRE standards using three or four wires.

Analog To Digital Converters (ADC) Applications

• Battery-operated systems
• Remote data acquisition
• Isolated data acquisition
• Pen screen digitizing
• Temperature measurement

Analog To Digital Converters (ADC) Procurement Notes

Verify that the specific suffix 'IG' corresponds to the industrial temperature grade (–40°C to 85°C) as defined in the manufacturer's ordering information. Confirm the package type is the 24-lead plastic SSOP. Ensure the design supports a 3V supply voltage, as this variant is distinct from the 5V-specified LTC1598 series.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC1598LIG#PBF when an 8-channel input is required within a 3V power budget. The device allows independent control of the multiplexer and ADC via separate chip selects (CSMUX and CSADC), which can maximize sample rates up to 20ksps if configured appropriately. Ensure the reference voltage span is between 1.5V and VCC to utilize the full dynamic range.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1594L/LTC1598L family of 3V micropower ADCs. The LTC1598L variant specifically provides 8 channels, whereas the LTC1594L offers 4 channels. Both share identical electrical characteristics regarding resolution, power consumption, and interface compatibility, differing primarily in channel count and package pinout (24-pin SSOP vs. 16-pin SO).

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify pin and hardware compatibility with other 12-bit SAR ADCs if migration is necessary, noting differences in supply voltage requirements and package dimensions.