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Product Detailed Parameters
- Description：IC ADC 24BIT SIGMA-DELTA 48VQFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Number of Bits：24
- Sampling Rate (Per Second)：125k
- Number of Inputs：8, 16
- Input Type：Differential, Single Ended
- Data Interface：SPI
- Configuration：MUX-ADC
- Ratio - S/H:ADC：-
- Number of A/D Converters：1
- Architecture：Sigma-Delta
- Reference Type：External
- Voltage - Supply, Analog：5V
- Voltage - Supply, Digital：2.7V ~ 5.25V
- Features：-
- Operating Temperature：-40°C ~ 105°C
- Package / Case：48-VFQFN Exposed Pad
- Supplier Device Package：48-VQFN (7x7)
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
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Overview
The ADS1258IRTCTG4 is a 16-channel, 24-bit analog-to-digital converter (ADC) from Texas Instruments. It utilizes a delta-sigma architecture with a maximum sampling rate of 125 kSPS in fixed channel mode. The device features an input multiplexer configurable for eight differential or sixteen single-ended inputs. It operates on a 4.75 V to 5.25 V analog supply and a 2.7 V to 5.25 V digital supply. Key specifications include a 0.001% FSR integral nonlinearity, 21.6 effective bits, and a QFN-48 package. It supports SPI communication and includes internal GPIO, oscillator, and temperature sensor capabilities.
Feature Summary
- Configurable input multiplexer supporting eight differential or sixteen single-ended channels
- Integrated system monitoring registers for power supply, temperature, reference voltage, gain, and offset data
- Programmable sensor bias current source for sensor excitation and integrity verification
Applications
- Medical electrocardiogram (ECG/EKG) sensor systems
- Industrial process control and machine monitoring
- High-resolution test and measurement instruments
Procurement Notes
Verify the suffix 'G4' indicates RoHS compliance and lead-free status per manufacturer documentation. Confirm the 'IR' designation corresponds to the industrial temperature range of -40°C to +105°C. Ensure the 'TCT' suffix matches the required tape and reel packaging format for surface-mount assembly processes.
Selection Notes
Select this component when high channel count and precision are required simultaneously. The ADS1258IRTCTG4 is suitable for applications needing simultaneous multi-channel acquisition with low noise performance. Consider the 125 kSPS total throughput limit when designing for high-speed scanning requirements across all sixteen channels.
Part Context
This part belongs to the ADS1258 family of high-performance ADCs. The 'G4' suffix denotes Green/RoHS-compliant manufacturing. The 'IR' prefix specifies the industrial operating temperature range. The 'TCT' suffix identifies the specific cut-tape or reel packaging configuration used for automated placement.
Replacement Considerations
The SC1642 is documented as a pin-to-pin compatible alternative. Verify that the SC1642 meets the specific voltage and interface requirements before substitution.
