ADS8345NB

Analog To Digital Converters (ADC) Overview

The ADS8345NB is a Texas Instruments 16-bit, 8-channel analog-to-digital converter (ADC) utilizing successive approximation register (SAR) architecture. It features a serial SPI-compatible interface and supports a sampling rate of 100 kS/s. The device operates on a single supply voltage ranging from 2.7 V to 5.25 V for both analog and digital domains. It accommodates either eight single-ended or four differential input channels. Key performance metrics include a Signal-to-Noise and Distortion Ratio (SINAD) of 85 dB, a Differential Nonlinearity (DNL) of ±2 LSB, and an Integral Nonlinearity (INL) of ±6 LSB. Typical power consumption is 3.2 mW at 100 kHz throughput with a 5 V supply.

Analog To Digital Converters (ADC) Feature Summary

• Supports flexible input configurations with eight single-ended or four differential channels.
• Features low-power operation with a dedicated shutdown mode for battery-powered applications.
• Provides high-resolution 16-bit data conversion with a maximum throughput of 100 kS/s.
• Utilizes a standard synchronous serial interface compatible with common microprocessor protocols.

Analog To Digital Converters (ADC) Applications

• Data acquisition systems requiring multi-channel signal monitoring.
• Industrial process control equipment.
• Portable instrumentation and test measurement devices.
• Battery-operated personal digital assistants and handheld units.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'NB' corresponds to the SSOP-20 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the external reference voltage requirements align with the selected application's precision needs, as the device utilizes an external reference configuration rather than an internal one.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS8345NB over the ADS8345E variant if tighter integral nonlinearity specifications are required, as the NB version offers ±6 LSB INL compared to ±8 LSB for the E version. Consider the SSOP-20 package constraints regarding thermal dissipation and board space. Verify that the system clock frequency supports the desired 100 kS/s sampling rate without exceeding the maximum operating temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Part Context

The ADS8345NB belongs to the ADS8345 family of high-speed, low-power ADCs from Texas Instruments. This series is designed to bridge the gap between lower-speed precision converters and higher-speed data acquisition solutions. The NB suffix specifically denotes the commercial grade device housed in an SSOP-20 package, distinguishing it from other package options like QSOP or PDIP variants within the same functional family.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS8345E is a pin-compatible alternative within the same series but exhibits different linearity specifications (±8 LSB INL). Engineers upgrading from older ADS7844 or ADS8344 designs may find this part directly interchangeable on existing footprints, provided the specific linearity and package requirements are met.