ADS8345E/2K5

Analog To Digital Converters (ADC) Overview

The ADS8345E/2K5 is a Texas Instruments 16-bit, 8-channel sampling analog-to-digital converter (ADC) featuring a successive approximation register (SAR) architecture. It operates on a single supply voltage ranging from 2.7 V to 5.25 V for both analog and digital domains. The device supports a maximum throughput of 100 kS/s and offers flexible input configurations, accommodating either eight single-ended or four differential channels. It utilizes a serial peripheral interface (SPI) compatible with standard DSP and microcontroller protocols. Key performance metrics include a signal-to-noise and distortion ratio (SINAD) of 85 dB, integral nonlinearity (INL) of ±8 LSB, and differential nonlinearity (DNL) of ±2 LSB. Typical power consumption is 8 mW at 100 kHz with a 5 V supply.

Analog To Digital Converters (ADC) Feature Summary

• Supports simultaneous sampling across eight single-ended or four differential input channels
• Features low-power operation with a dedicated shutdown mode reducing consumption below 15 µW
• Provides pin-compatible replacement for legacy ADS7844 and ADS8344 devices
• Integrates an internal clock generator eliminating the need for external timing components

Analog To Digital Converters (ADC) Applications

• Portable data acquisition systems requiring high channel count and low power
• Industrial process control loops involving multiple sensor inputs
• Medical instrumentation such as portable patient monitors
• Battery-powered test and measurement equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix '2K5' against the manufacturer's current datasheet to confirm packaging details, as this designation typically indicates tube packaging quantities. Ensure compatibility with existing board layouts by confirming pinout alignment with ADS7844 if used as a drop-in replacement. Check RoHS compliance status and moisture sensitivity level requirements for your assembly process.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS8345E/2K5 when system design requires eight independent analog inputs with 16-bit resolution. This component is suitable for applications where moderate speed up to 100 kS/s is sufficient but channel density is critical. Consider the external reference requirement, as the device does not integrate an internal voltage reference unlike some higher-speed counterparts in the family.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS8345 series of high-performance, multi-channel ADCs from Texas Instruments. The series is designed for applications needing multiple channels without the complexity of multiplexed single-channel solutions. The E variant denotes commercial temperature range operation (-40°C to +85°C), while the /2K5 suffix specifies the specific tube packaging configuration provided by distributors.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS8345E is explicitly documented as pin-compatible with the ADS7844 and ADS8344. Engineers upgrading from these legacy parts can utilize the ADS8345E/2K5 without modifying the PCB footprint, benefiting from improved linearity and lower power consumption.