LTC2355IMSE-12#PBF

Analog To Digital Converters (ADC) Overview

The LTC2355IMSE-12#PBF is a 12-bit, 3.5Msps serial analog-to-digital converter (ADC) from Analog Devices Inc., housed in a 10-lead MSOP package. It operates on a single 3.3V supply with a typical active current of 5.5mA and power dissipation of 18mW. The device features differential inputs supporting a 0V to 2.5V unipolar range and includes an internal 2.5V bandgap reference. Key performance metrics include a Signal-to-Noise Plus Distortion Ratio (SINAD) of 71.1dB at 100kHz input, a Spurious Free Dynamic Range (SFDR) of 86dB, and Integral Nonlinearity (INL) of ±0.25 LSB. It supports Sleep (13µW) and Nap (4mW) shutdown modes.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit Resolution with 3.5Msps Sampling Rate
• Differential Inputs with 0V to 2.5V Unipolar Range
• Internal 2.5V Bandgap Reference
• Sleep Mode Power Consumption of 13µW

Analog To Digital Converters (ADC) Applications

• Data Acquisition Systems
• Uninterrupted Power Supplies
• Multiphase Motor Control
• RFID Systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the IMSE variant corresponds to the industrial temperature range of -40°C to +85°C. Ensure the ordering code matches the exact pinout and package dimensions required for the target PCB layout.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a high-speed, low-power ADC is required for portable applications. The 12-bit resolution is suitable for general-purpose data acquisition where 71.1dB SINAD is sufficient. Consider the external reference voltage requirements if higher precision than the internal 2.5V reference is needed, noting the VREF pin can be overdriven up to VDD.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC2355 family, which also includes the 14-bit LTC2355-14 variant. Both share identical pinouts, timing characteristics, and power management features. The primary distinction lies in the resolution and corresponding dynamic performance specifications, such as SINAD and noise levels.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC2355CMSE-12#PBF serves as a commercial grade alternative within the same package and pinout configuration. Verify that the extended temperature range of the IMSE variant (-40°C to +85°C) is not strictly required before substituting with the CMSE version (0°C to 70°C).

Analog To Digital Converters (ADC) FAQ

How does the device handle common mode noise?

The LTC2355-12 provides 80dB of common mode rejection, allowing users to eliminate ground loops and common mode noise by measuring signals differentially from the source.

What is the maximum clock frequency for full throughput?

A 63MHz clock allows the full sampling rate of 3.5Msps to be achieved, provided two additional clock cycles are allowed for acquisition time between conversions.

Can the internal reference be overridden?

Yes, the internal 2.5V reference can be overdriven by an external reference voltage ranging from 2.55V to VDD.