ADS1148IRHBT

Analog To Digital Converters (ADC) Overview

The ADS1148IRHBT is a 16-bit, low-power delta-sigma analog-to-digital converter (ADC) manufactured by Texas Instruments. It features a multiplexer, programmable gain amplifier (PGA), and precision ADC in a single package. The device supports up to seven differential or fourteen single-ended inputs with a maximum data rate of 2 kSPS. It operates on an analog supply voltage ranging from 2.7 V to 5.25 V and a digital supply voltage of the same range. The component is housed in a 32-VQFN package measuring 5x5 mm and is rated for operation between -40°C and +105°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a low-noise PGA with selectable gains and a high-precision delta-sigma ADC architecture.
• Includes built-in excitation current sources (iDACs) for direct sensor excitation without external components.
• Features a flexible input multiplexer supporting differential, pseudo-differential, and single-ended configurations.
• Provides internal reference options and GPIO capabilities for system monitoring and control.

Analog To Digital Converters (ADC) Applications

• Precision temperature sensor measurements including RTDs, thermistors, and thermocouples.
• Strain gauge and load cell interfaces requiring high-resolution signal conditioning.
• Industrial process control systems utilizing resistive bridge sensors.
• Medical instrumentation requiring isolated or high-accuracy biopotential signal acquisition.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix IRHBT indicates the industrial temperature grade (-40°C to +105°C) and the 32-VQFN package type. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure ESD handling procedures are followed due to the moisture sensitivity level associated with the QFN package. Cross-reference part numbers with authorized distributors to avoid counterfeit components.

Analog To Digital Converters (ADC) Selection Notes

Select this model when seven differential channels or fourteen single-ended channels are required within a compact footprint. Choose the ADS1148 over the ADS1146 or ADS1147 if higher channel count is necessary while maintaining 16-bit resolution. Consider the integrated iDACs if external excitation circuitry can be eliminated. Verify that the 2 kSPS maximum data rate meets the application's bandwidth requirements compared to faster alternatives like the ADS1248.

Analog To Digital Converters (ADC) Part Context

The ADS1148 belongs to the Texas Instruments ADS114x family of precision ADCs designed for sensor measurement applications. It shares architectural similarities with the ADS1146 and ADS1147 but offers increased input channel flexibility. The IRHBT variant specifically denotes the industrial temperature range and surface-mount packaging. This component is commonly used in conjunction with Texas Instruments' evaluation modules such as the ADS1148V2EVM for design validation.

Analog To Digital Converters (ADC) Replacement Considerations

ADS1148IPWR: Pin-compatible alternative in TSSOP-28 package with identical electrical specifications. ADS1146IRHBT: Lower channel count variant (four differential inputs) in the same VQFN package. ADS1147IRHBT: Intermediate channel count variant (five differential inputs) in the same VQFN package. ADS1248IRHBT: Higher speed version supporting up to 20 kSPS data rates.