Part A
ADS124S08IPBSR
Texas Instruments
- Lifecycle
- Active
- Stock
- 4103 PCS
- Package
- TQFP-32
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Not a drop-in replacement
The ADS124S08IPBSR and ADS1296IPAGR are not drop-in replacements for one another. The ADS124S08IPBSR is a precision 24-bit sensor-measurement ADC with eight single-ended or four differential inputs, while the ADS1296IPAGR is a 24-bit simultaneous-sampling biopotential front end with six differential channels and integrated ECG/EEG-specific features. They differ in channel architecture, integrated front-end functionality, package footprint, and target application, so a direct substitution is not feasible without a full redesign and validation.
Different channel architecture
Different integrated front end
Different package footprint
Different target application
Parts at a glance
Part B
ADS1296IPAGR
Texas Instruments
- Lifecycle
- Active
- Stock
- 9357 PCS
- Package
- TQFP-64
- Series
- Acquisição de dados - Front End analógico (AFE)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS124S08IPBSR | ADS1296IPAGR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit delta-sigma ADCs, so nominal resolution is equivalent; this is a baseline requirement for precision measurement. |
| Number of input channels | 8 (single-ended) / 4 (differential) | 6 (differential) | Channel count determines how many sensors or electrodes can be measured simultaneously; the ADS1296 provides 6 differential channels versus 4 differential on the ADS124S08. |
| Input type / architecture | Precision delta-sigma ADC (general-purpose) | Delta-sigma ADC with integrated PGA and ECG/EEG front-end | The ADS1296 integrates a biopotential front-end (PGA, RLD, lead-off detection), making it purpose-built for ECG/EEG, while the ADS124S08 is a general-purpose precision ADC. |
| Data rate (max SPS) | Up to 4 kSPS | Up to 32 kSPS | Higher maximum sample rate supports faster signal acquisition; the ADS1296 offers significantly higher throughput for dynamic biopotential signals. |
| Integrated PGA gain range | 1 to 128 | 1 to 12 | PGA gain range affects the ability to amplify small signals; the ADS124S08 supports higher gain for very low-level sensors, while the ADS1296 targets typical biopotential amplitudes. |
| Supply voltage (analog) | 2.7 V to 5.25 V (single supply) | 2.7 V to 5.25 V (analog), 1.8 V to 3.6 V (digital) | Supply requirements determine power-rail compatibility; the ADS1296 specifies a separate digital supply range, affecting system-level power design. |
| Interface | SPI | SPI | Both use SPI, so host microcontroller compatibility is preserved; interface protocol is a key factor for drop-in substitutability. |
| Package | TQFP-32 | TQFP-64 | Package footprint and pin count differ, so PCB layout and board space must be redesigned; this directly impacts physical substitutability. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +85 °C | The wider temperature range of the ADS124S08 suits harsher industrial environments, while the ADS1296 is limited to standard commercial/industrial ranges. |
| Typical application focus | Precision sensor measurement, industrial process control, temperature/RTD sensing | ECG/EEG/biopotential acquisition, patient monitoring | Application focus indicates functional substitutability; the two parts target different end markets despite sharing 24-bit delta-sigma conversion. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS124S08IPBSR | ADS1296IPAGR |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Number of Channels | - | 6 |
| Power (Watts) | - | 17.5 mW |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V | 1.65V ~ 3.6V |
| Mounting Type | - | Surface Mount |
| Sampling Rate(Per Second) | 4k | - |
| Number of Inputs | 12 | - |
| Input Type | Single Ended | - |
| Data Interface | SPI | - |
| Configuration | MUX-PGA-ADC | - |
| Ratio - S / H: ADC | 0:1 | - |
| Number of A/D Converters | 1 | - |
| Architecture | Sigma-Delta | - |
| Reference Type | External, Internal | - |
| Features | PGA | - |
| Operating Temperature | -50°C ~ 125°C | - |
Frequently asked questions
What are the primary functional differences between the ADS124S08IPBSR and the ADS1296IPAGR?
The ADS124S08IPBSR is a 24-bit, 8-channel delta-sigma ADC designed for precision sensor measurement, while the ADS1296IPAGR is a 24-bit, 6-channel simultaneous-sampling delta-sigma ADC with integrated ECG/EEG front-end features. The ADS1296 integrates programmable gain amplifiers, lead-off detection, and respiration impedance measurement, whereas the ADS124S08 focuses on low-noise, general-purpose precision signal acquisition with a flexible input multiplexer and PGA.
Do the ADS124S08IPBSR and ADS1296IPAGR have the same number of input channels?
No. The ADS124S08IPBSR provides 8 input channels (configurable as 8 single-ended or 4 differential inputs) through its input multiplexer. The ADS1296IPAGR provides 6 simultaneous-sampling channels. The channel count and sampling architecture differ, so they are not pin-for-pin or function-for-function equivalents.
Are the ADS124S08IPBSR and ADS1296IPAGR available in the same package type?
No. The ADS124S08IPBSR is offered in a 32-pin TQFP package, while the ADS1296IPAGR is offered in a 64-pin TQFP package. The different pin counts and footprints prevent direct PCB drop-in replacement without layout changes.
Can the ADS124S08IPBSR and ADS1296IPAGR operate from the same supply voltage?
Both devices support analog supply voltages in the range of 2.7 V to 5.25 V (unipolar) and digital supplies around 1.8 V to 3.6 V, per their respective datasheets. However, the ADS1296IPAGR is optimized for biopotential front-end applications and includes additional internal blocks that may affect overall power budget and supply decoupling requirements. Designers should verify the exact supply rails and current consumption from each datasheet before sharing a power design.
Is the ADS1296IPAGR a suitable replacement for the ADS124S08IPBSR in precision sensor applications?
Not directly. The ADS1296IPAGR is purpose-built for ECG/EEG and biopotential acquisition with simultaneous sampling and integrated lead-off/respiration features, while the ADS124S08IPBSR targets general-purpose precision sensor measurement with a flexible multiplexer. Substitution requires validating input configuration, channel count, package footprint, and firmware register maps against the target design; the two are not interchangeable without redesign.
What sampling architecture does each device use?
The ADS124S08IPBSR uses a single delta-sigma modulator with an input multiplexer, so channels are converted sequentially. The ADS1296IPAGR uses six simultaneous-sampling delta-sigma converters, allowing all six channels to be captured at the same instant, which is important for multi-lead biopotential measurements. This architectural difference is a key selection criterion between the two parts.
Do both devices support SPI communication?
Yes. Both the ADS124S08IPBSR and ADS1296IPAGR provide an SPI-compatible serial interface for register configuration and data readout, as documented in their respective manufacturer datasheets. However, the register maps, command sets, and data output formats differ, so firmware cannot be reused without modification.