LTC1609AISW#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC1609AISW#TRPBF is a 16-bit, 200ksps serial sampling analog-to-digital converter (ADC) from Analog Devices. It operates on a single 5V supply with typical power dissipation of 65mW and features a power-down mode reducing consumption to 50mW. The device integrates a sample-and-hold circuit, precision reference, switched-capacitor SAR architecture, and 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 integral linearity error of –2LSB.

Analog To Digital Converters (ADC) Feature Summary

• 16-bit resolution with 200ksps sampling rate
• Multiple input ranges: Unipolar (0-10V, 0-5V, 0-4V) and Bipolar (-10V, -5V, -3.3V)
• Single 5V supply operation with 65mW typical power dissipation
• Integrated precision reference and internal clock

Analog To Digital Converters (ADC) Applications

• Industrial process control systems
• Multiplexed data acquisition systems
• High-speed data acquisition for PCs
• Digital signal processing applications

Analog To Digital Converters (ADC) Procurement Notes

Verify the 'AISW' suffix indicates the Industrial temperature range (-40°C to 85°C) and SSOP-20 package as per the datasheet ordering information. Confirm RoHS compliance status with the manufacturer or distributor, as historical Linear Technology parts may vary in lead-free certification depending on production date. Ensure the specific lot matches the required operating temperature range for industrial environments.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a high-resolution, low-power ADC with flexible input ranges is required. The integrated reference simplifies design by eliminating external components for standard ranges. Consider the serial interface timing constraints if interfacing with high-speed microprocessors. The 20-pin SO package is suitable for space-constrained PCB layouts compared to the 28-lead SSOP version.

Analog To Digital Converters (ADC) Part Context

The LTC1609 series serves as an improved second source for legacy parts like the ADS7809 and AD977A. It belongs to a family of serial sampling ADCs designed for cost-sensitive, high-performance data acquisition. The 'AI' designation specifies the industrial temperature grade, while 'SW' denotes the 20-lead plastic SO package. This part bridges the gap between general-purpose converters and specialized high-speed devices.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitutes include the ADS7809 and AD977A, which are pin-compatible legacy equivalents. When replacing, verify that the new part's input impedance and reference requirements match the existing circuit design, particularly for the –3.3V bipolar range where attenuation characteristics differ slightly.