LTC1609ISW#PBF

Analog To Digital Converters (ADC) Overview

The LTC1609ISW#PBF is a 16-bit, 200ksps serial sampling Analog-to-Digital Converter (ADC) housed in a 20-lead SOIC package. It operates from a single 5V supply and dissipates 65mW typically. The device integrates a sample-and-hold circuit, precision reference, switched-capacitor SAR architecture, and an internal clock. It supports multiple input ranges: unipolar (0V to 10V, 0V to 5V, 0V to 4V) and bipolar (–10V, –5V, –3.3V). Key electrical specifications include a typical Signal-to-Noise Ratio (SNR) of 87dB, guaranteed no missing codes over temperature, and ±2LSB Integral Nonlinearity (INL).

Analog To Digital Converters (ADC) Feature Summary

• 16-bit resolution with 200ksps sampling rate and 65mW power dissipation.
• Multiple analog input ranges: Unipolar (0V to 10V/5V/4V) and Bipolar (–10V/–5V/–3.3V).
• Integrated 2.5V reference with external reference capability; SNR of 87dB typical.
• Serial interface compatible with DSPs and microprocessors via CS, R/C, DATA, and DATACLK pins.

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring high accuracy.
• Multiplexed data acquisition systems for sensor interfacing.
• High-speed data acquisition modules for personal computers.
• Digital signal processing front-ends for audio or vibration analysis.

Analog To Digital Converters (ADC) Procurement Notes

Verify the operating temperature range corresponds to the 'I' suffix (–40°C to 85°C) rather than the 'C' suffix (0°C to 70°C). Confirm the package type is the 20-lead SOIC (SW) variant. Ensure the order number includes the '#PBF' suffix for lead-free compliance if required by assembly specifications. Cross-reference pinouts carefully against the 28-lead SSOP version if substituting.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single-supply 5V operation is required alongside 16-bit resolution. It is suitable for applications needing flexible input scaling without external attenuators for standard voltage ranges. Consider the internal reference drift (-5 ppm/°C) and offset errors if absolute accuracy exceeds factory trim capabilities; external trimming circuits are supported via R1IN/R2IN/R3IN connections. Ensure the driving source impedance is low enough to meet the 2ms acquisition time requirement.

Analog To Digital Converters (ADC) Part Context

The LTC1609 series serves as a high-performance serial ADC alternative to older parallel architectures. The ISW variant specifically denotes the industrial temperature grade within the 20-pin SOIC form factor. It is functionally comparable to parts like the ADS7809 and AD977A but offers integrated serial output logic, reducing system complexity compared to parallel-output ADCs of similar resolution.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitutes include the ADS7809 and AD977A. Verify pin compatibility and logic levels when replacing, as interface timing may differ. Ensure the replacement part supports the required input voltage ranges and sampling speed.