ADS1203IPWT

Overview

The ADS1203IPWT is a single-channel, 16-bit analog-to-digital converter (ADC) from Texas Instruments, utilizing sigma-delta modulation architecture. It operates with an analog supply voltage range of 4.5 V to 5.5 V and a digital supply voltage range of 2.7 V to 5.5 V. The device supports a maximum sampling rate of 40 kS/s and features a differential input type. Key performance metrics include a signal-to-noise ratio (SNR) of 85 dB, a differential nonlinearity (DNL) of +/- 1 LSB, and an integral nonlinearity (INL) of +/- 4 LSB. It is housed in an 8-pin TSSOP package and includes an internal oscillator.

Feature Summary

• 16-bit resolution with 40 kS/s sampling rate using sigma-delta architecture
• Integrated internal oscillator eliminates need for external clock components
• Low power consumption of 33 mW typical
• Operates over extended temperature range from -40°C to +125°C

Applications

• Current shunt monitoring applications
• Industrial process control systems
• Weight scale and load cell interfaces

Procurement Notes

Verify the specific suffix IPWT corresponds to the TSSOP-8 package and industrial temperature grade (-40°C to +125°C). Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure power supply decoupling meets the requirements for the 4.5 V to 5.5 V analog and 2.7 V to 5.5 V digital rails specified in the datasheet.

Selection Notes

Select this component when a single-channel, high-resolution ADC with integrated clocking is required for low-frequency precision measurements. Compare against ADS1202 if a lower operating temperature range (up to +85°C) is sufficient, or ADS1203IRGTR if a QFN package is preferred for space-constrained designs. Verify SPI interface compatibility with the host microcontroller.

Part Context

The ADS1203 belongs to the ADS120x family of precision ADCs designed for cost-sensitive, high-performance applications. It serves as a complete data acquisition system by integrating the sigma-delta modulator, programmable gain amplifier, and reference circuitry. The IPWT variant specifically denotes the plastic TSSOP-8 surface-mount package suitable for automated assembly processes.

Replacement Considerations

ADS1202IPWT offers similar functionality but is rated for a commercial temperature range (0°C to +70°C). ADS1203IRGTR provides the same electrical specifications in a 16-VQFN package. Cross-check pinout compatibility and thermal characteristics before substituting.