LTC1405IGN#PBF

Analog To Digital Converters (ADC) Overview

The LTC1405IGN#PBF is a 12-bit, 5Msps sampling analog-to-digital converter (ADC) housed in a 28-lead narrow SSOP package. It operates from either a single +5V or dual ±5V supply, consuming 115mW of power. The device integrates a high dynamic range sample-and-hold circuit, a precision reference, and a programmable gain amplifier (PGA). Key electrical specifications include an integral nonlinearity error of less than 0.35 LSB and a differential nonlinearity of less than 0.25 LSB. At the Nyquist frequency of 2.5MHz, it achieves a signal-to-noise plus distortion ratio of 71.3dB and a spurious-free dynamic range of 85dB.

Analog To Digital Converters (ADC) Feature Summary

• 5Msps sampling rate with 100MHz full-power bandwidth
• Low power dissipation of 115mW at 5V supply
• Flexible input PGA with selectable 1x or 2x gain
• True differential inputs with 75dB common mode rejection

Analog To Digital Converters (ADC) Applications

• Telecommunications systems
• Digital signal processing
• Multiplexed data acquisition systems
• High-speed data acquisition
• Spectral analysis

Analog To Digital Converters (ADC) Procurement Notes

Verify that the component matches the specific ordering suffix #PBF to ensure lead-free compliance. Confirm the package type is the 28-lead narrow SSOP (GN). Check the temperature grade suffix (C for commercial, I for industrial) against the required operating range of 0°C to 70°C or –40°C to 85°C. Ensure the source documentation corresponds to the Analog Devices datasheet 1405fa.

Analog To Digital Converters (ADC) Selection Notes

Select this part when a 12-bit resolution and 5Msps throughput are required with low power consumption. Choose the LTC1405IGN#PBF if the application requires operation from a single 5V supply or dual ±5V supplies. Consider the integrated PGA and flexible input ranges (–2.048V, –1.024V, –0.512V) if signal conditioning is needed before digitization. Verify that the 28-SSOP package fits the PCB layout constraints.

Analog To Digital Converters (ADC) Part Context

The LTC1405 is part of the Linear Technology (now Analog Devices) family of high-performance ADCs. It is pin-compatible with the LTC1420, which offers a higher 10Msps sampling rate. The device is designed for applications requiring accurate digitization of wide dynamic range signals, such as in communications and instrumentation. The #PBF suffix indicates a lead-free and RoHS-compliant version of the standard LTC1405IGN.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1420 is a pin-compatible alternative offering 10Msps performance. For lower speed requirements, consider other 12-bit ADCs from the same manufacturer. Verify that any substitute maintains the 28-SSOP package and compatible supply voltage ranges.