ADS1243IPWT

Overview

The ADS1243IPWT is a 24-bit, four-channel analog-to-digital converter (ADC) from Texas Instruments, utilizing sigma-delta 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 features an integrated programmable gain amplifier (PGA) with gains up to 128, supporting differential inputs. It communicates via a standard SPI interface with data rates up to 15 S/s. Key performance metrics include a maximum integral nonlinearity of +/- 0.0015% FSR and differential nonlinearity of +/- 1 LSB. Power consumption is specified at 600 uW during active operation and 1.9 mW maximum dissipation. It is housed in a TSSOP-20 package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated programmable gain amplifier (PGA) with selectable gain settings up to 128
• Built-in 50 Hz and 60 Hz rejection filters for noise suppression
• General-purpose input/output (GPIO) pins for flexible system control
• Sigma-delta modulation structure ensuring high resolution and linearity

Applications

• Industrial process control systems requiring high-precision signal acquisition
• Weigh scales and load cell measurement applications
• Portable instrumentation devices powered by single-supply batteries
• Medical equipment demanding low-noise analog front-end processing

Procurement Notes

Verify the specific suffix 'IPWT' corresponds to the TSSOP-20 package and reel/cut-tape availability. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the ordering quantity matches the distributor's minimum packaging requirements. Cross-reference the datasheet revision date to validate parameter accuracy against current production standards.

Selection Notes

Select this component when four differential channels with integrated PGA are required in a compact surface-mount package. The 24-bit resolution and low power consumption make it suitable for battery-operated portable devices. Verify that the 15 S/s maximum data rate meets the application's bandwidth requirements. Ensure external reference voltage compatibility within the 100 mV to 5 V range for optimal performance.

Part Context

The ADS1243 belongs to the ADS124x family of precision ADCs designed for low-power, high-resolution applications. It shares architectural similarities with the ADS1242 but offers additional channel count and GPIO functionality. This series is commonly used in industrial and medical fields where accurate DC measurements are critical. The IPWT suffix denotes the specific TSSOP-20 package variant optimized for automated surface-mount assembly processes.

Replacement Considerations

The ADS1242 serves as a pin-compatible alternative with fewer channels. Evaluate the ADS1244 if higher channel counts or different interface options are needed. Verify electrical specifications and package dimensions before substituting any component to ensure mechanical and functional compatibility.