LTC1609CG#PBF

Analog To Digital Converters (ADC) Overview

The LTC1609CG#PBF is a 16-bit, 200ksps serial sampling Analog-to-Digital Converter (ADC) from Analog Devices Inc. It operates on a single 5V supply and dissipates 65mW typically. The device integrates a sample-and-hold circuit, precision reference, switched-capacitor SAR architecture, and trimmed 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–10V, 0V–5V, 0V–4V) and Bipolar (-10V, -5V, -3.3V).
• Integrated 2.5V precision reference with external reference capability.
• 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 monitoring multiple channels.
• High-speed data acquisition interfaces for personal computers.
• Digital signal processing (DSP) front-end stages.

Analog To Digital Converters (ADC) Procurement Notes

Verify the package type matches the design requirements; the CG suffix indicates a 28-lead SSOP package. Confirm that the commercial temperature range (0°C to 70°C) aligns with the operational environment. Ensure the single 5V supply voltage is stable within the 4.75V to 5.25V range for optimal performance. Check for pin compatibility if replacing older components like the ADS7809 or AD977A.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 16-bit resolution and 200ksps throughput are required in a low-power, single-supply application. Consider the integrated reference and clock features to reduce external component count. Evaluate the input impedance requirements for the chosen voltage range, as they vary between 10kΩ and 22.9kΩ. Ensure the system can accommodate the serial data output timing constraints defined by the DATACLK and SYNC signals.

Analog To Digital Converters (ADC) Part Context

The LTC1609 is part of Linear Technology's (now Analog Devices) series of serial sampling ADCs. It serves as an improved second source for the Texas Instruments ADS7809 and Analog Devices AD977A. The device is designed to simplify system integration by combining the ADC, reference, and clock into a single package, reducing board space and design complexity for industrial and PC-based data acquisition applications.

Analog To Digital Converters (ADC) Replacement Considerations

The datasheet identifies the LTC1609 as an improved second source for the ADS7809 and AD977A. Verify pinout compatibility and electrical parameter alignment before substitution. Note that the LTC1609CG uses a 28-lead SSOP package, whereas other variants may use different packages.