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Product Detailed Parameters
- Description：IC ADC 24BIT SIGMA-DELTA 28SSOP
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Number of Bits：24
- Sampling Rate (Per Second)：30k
- Number of Inputs：4, 8
- Input Type：Differential, Single Ended
- Data Interface：SPI
- Configuration：MUX-PGA-ADC
- Ratio - S/H:ADC：-
- Number of A/D Converters：1
- Architecture：Sigma-Delta
- Reference Type：External
- Voltage - Supply, Analog：5V
- Voltage - Supply, Digital：1.8V ~ 3.6V
- Features：PGA
- Operating Temperature：-40°C ~ 85°C
- Package / Case：28-SSOP (0.209", 5.30mm Width)
- Supplier Device Package：28-SSOP
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
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Overview
The ADS1256IDBRG4 is a very low noise, 24-bit analog-to-digital converter (ADC) utilizing delta-sigma architecture. It integrates an on-chip programmable gain amplifier (PGA) with gains selectable from 1 to 128 and a precision internal reference. The device supports up to eight differential or sixteen single-ended inputs via an onboard multiplexer. It operates with a maximum data rate of 30 kSPS and communicates through a standard SPI-compatible serial interface. The component is housed in a 28-pin SSOP package and functions within a digital supply voltage range of 1.8 V to 3.6 V.
Feature Summary
- Integrates a high-resolution 24-bit delta-sigma ADC with a built-in programmable gain amplifier for signal conditioning.
- Features an onboard multiplexer capable of handling multiple differential or single-ended input channels.
- Includes a precision internal reference voltage source to simplify external circuit design.
Applications
- Industrial process control systems requiring high-precision sensor interfacing
- Weigh scales and load cell measurement applications
- Medical equipment such as electrocardiogram (ECG) devices
Procurement Notes
Verify the specific suffix G4 indicates RoHS compliance when sourcing this component. Confirm the package type matches the required 28-SSOP footprint for PCB layout compatibility. Ensure the digital supply voltage requirements align with the target system logic levels before integration.
Selection Notes
Select this model for applications demanding high resolution and low noise performance at moderate sampling rates. Consider the integrated PGA if signal amplification is needed prior to conversion. Verify that the SPI interface timing meets the microcontroller or DSP capabilities in the host system design.
Part Context
This part belongs to the Texas Instruments ADS125x family of high-performance data converters. It shares architectural similarities with the ADS1255 but offers additional input channels through its integrated multiplexer. The IDBRG4 designation specifies the industrial temperature range and tape-and-reel packaging format.
Replacement Considerations
The ADS1256IDBT serves as a direct pin-compatible alternative with identical electrical specifications. The ADS1255 provides similar functionality but supports fewer input channels due to the absence of the onboard multiplexer.
