ADS1281IPW

Overview

The ADS1281IPW is a single-channel, 24-bit Sigma-Delta analog-to-digital converter manufactured by Texas Instruments. It operates with an analog supply voltage range of 4.75 V to 5.25 V and a digital supply voltage range of 1.65 V to 3.6 V. The device supports a maximum sampling rate of 4 kS/s with differential input configuration. Key performance metrics include a signal-to-noise ratio (SNR) of 130 dB, differential nonlinearity (DNL) of +/- 1 LSB, and integral nonlinearity (INL) of 0.0005% FSR. Power consumption is specified at 12 mW under typical operating conditions. The component functions within a temperature range of -40°C to +85°C and is housed in a TSSOP-24 surface-mount package.

Feature Summary

• Integrates a high-performance Sigma-Delta modulator with programmable SINC and FIR digital filters for optimized noise and linearity.
• Features a built-in precision reference voltage source and programmable gain amplifier to simplify system design.
• Includes internal sensor excitation current sources to facilitate direct connection to bridge sensors.

Applications

• Seismic data acquisition systems
• High-precision industrial instrumentation
• Medical monitoring equipment

Procurement Notes

Verify the specific suffix against official documentation to confirm pinout compatibility and electrical specifications. Confirm RoHS compliance status through manufacturer datasheets prior to integration. Ensure that external power supply rails strictly adhere to the defined voltage limits to prevent device damage or operational instability during procurement validation.

Selection Notes

Select this component when a single-channel, high-resolution conversion path is required. Verify that the host microcontroller supports the necessary SPI interface timing. Evaluate whether the integrated reference and PGA meet the system accuracy requirements to reduce external component count. Consider thermal management strategies given the specified power dissipation characteristics.

Part Context

This part belongs to the ADS1281 series of ultra-high precision ADCs designed for demanding measurement applications. It shares architectural similarities with other devices in the family but is distinct in its single-channel configuration and specific packaging options. The IPW suffix denotes the TSSOP-24 package variant available for surface mount assembly.

Replacement Considerations

ADS1281IPWR: Reel version of the same functional device.

FAQ

What is the maximum sampling rate supported by the ADS1281IPW?

The device supports a maximum sampling rate of 4000 samples per second (4 kS/s).

Does the ADS1281IPW include an internal voltage reference?

Yes, the device integrates a precision reference voltage source to simplify board design.

What is the operating temperature range for this component?

The ADS1281IPW is rated for operation between -40°C and +85°C.