ADS1203IPWR

Overview

The ADS1203IPWR is a single-channel, 16-bit resolution analog-to-digital converter (ADC) manufactured by Texas Instruments. It utilizes a second-order delta-sigma modulation architecture with an integrated oscillator and operates at a sampling rate of up to 40 kS/s. The device supports differential input signals within a ±250 mV range and features SPI-compatible digital interfaces. It requires an analog supply voltage between 4.5 V and 5.5 V and a digital supply voltage ranging from 2.7 V to 5.5 V. Key performance metrics include a signal-to-noise ratio (SNR) of 85 dB, differential nonlinearity (DNL) of ±1 LSB, and integral nonlinearity (INL) of ±4 LSB. The component is housed in an 8-pin TSSOP package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• 16-bit resolution with 40 kS/s sampling rate using sigma-delta modulation
• Integrated internal oscillator eliminates external clock requirements
• Low power consumption of 33 mW with wide operating temperature range (-40°C to +125°C)
• SPI-compatible serial interface for simplified microcontroller connection

Applications

• Motor control systems requiring precise current measurement
• Industrial process control applications involving shunt-based current sensing
• High-resolution data acquisition systems for resistive bridge sensors

Procurement Notes

Verify the specific suffix IPWR corresponds to the TSSOP-8 package and tape-and-reel shipping configuration. Confirm RoHS compliance status and moisture sensitivity level (MSL) ratings prior to procurement. Ensure the ordering part number matches the required temperature grade and pinout specifications for the target PCB design.

Selection Notes

Select the ADS1203IPWR when a single-channel, high-linearity ADC is needed for low-power, space-constrained designs. The integrated oscillator simplifies board layout compared to devices requiring external clocks. Verify that the ±250 mV input range aligns with the sensor output; external amplification may be necessary for larger signal swings. Ensure the system can accommodate the separate analog and digital supply voltage requirements.

Part Context

The ADS1203 belongs to the ADS120x family of precision analog-to-digital converters designed for motor control and current measurement applications. The IPWR suffix denotes the surface-mount TSSOP-8 package variant. This component serves as a direct replacement for older Burr-Brown branded parts within the same functional lineage, maintaining compatibility with existing circuit architectures while offering improved integration through the internal oscillator.

Replacement Considerations

Direct pin-compatible alternatives within the ADS120x family include the ADS1202 and ADS1204. The ADS1202 offers lower linearity specifications, while the ADS1204 provides two channels instead of one. Verify that any substitute maintains the required 16-bit resolution and 40 kS/s speed.