LTC1409IG#PBF

Analog To Digital Converters (ADC) Overview

The LTC1409IG#PBF is a 12-bit, 800ksps sampling A/D converter featuring a 1μs acquisition time and 80mW power dissipation from ±5V supplies. It integrates a high dynamic range sample-and-hold circuit and a precision internal reference. The device supports digitally selectable Nap (4mW) and Sleep (10μW) shutdown modes for low-power operation. Key electrical parameters include a full-scale input range of ±2.5V, maximum DC specifications of ±1LSB INL and ±1LSB DNL, and an S/(N + D) of 72.5dB at the Nyquist frequency of 400kHz. It operates with a 20MHz full-power bandwidth sampling capability.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 800ksps sampling rate and no pipeline delay
• True differential inputs providing 60dB common mode rejection
• Digitally selectable Nap (4mW) and Sleep (10μW) shutdown modes
• Integrated 2.50V precision reference with 15ppm/°C temperature coefficient

Analog To Digital Converters (ADC) Applications

• Telecommunications systems
• Digital signal processing applications
• Multiplexed data acquisition systems
• High-speed data acquisition
• Spectrum analysis equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the package type corresponds to the IG suffix, which indicates a 28-lead plastic SO package. Confirm the operating temperature range matches the I grade specification of –40°C to 85°C. Ensure supply voltages are within the recommended ±5V limits to maintain specified linearity and dynamic performance characteristics.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring true differential analog inputs to reject common-mode noise. The internal reference simplifies design by eliminating external precision voltage sources. Consider the 150ns acquisition time when driving high source impedance circuits; an input buffer amplifier may be necessary to ensure full throughput rates without settling errors.

Analog To Digital Converters (ADC) Part Context

The LTC1409 is part of Analog Devices' portfolio of successive approximation register (SAR) ADCs. It utilizes a capacitive DAC architecture with internal clocking and control logic. The device is designed for easy interfacing with microprocessors and DSPs via a μP-compatible 12-bit parallel output port and dedicated control signals like BUSY and CONVST.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.