Part A
ADS124S06IPBSR
Texas Instruments
- Lifecycle
- Active
- Stock
- 6728 PCS
- Package
- TQFP-32
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1294IPAG and ADS124S06IPBSR are not functionally interchangeable. The ADS1294IPAG is a four-channel simultaneous-sampling biopotential front end with integrated programmable gain amplifiers and a delta-sigma modulator architecture tailored for ECG and EEG signal chains, while the ADS124S06IPBSR is a six-channel multiplexed low-noise precision ADC intended for general-purpose sensor measurement. Their channel architecture, sampling topology, package footprint, and target application domains differ fundamentally, so substituting one for the other requires a complete redesign of the signal chain, layout, and firmware rather than a direct part swap.
Different channel architecture
Different sampling topology
Different package footprint
Different application domain
Parts at a glance
Part B
ADS1294IPAG
Texas Instruments
- Lifecycle
- Active
- Stock
- 1382 PCS
- Package
- TQFP-64
- Series
- Acquisition de données - Analog Front End (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 | ADS1294IPAG | ADS124S06IPBSR | Why it matters |
|---|---|---|---|
| Number of ADC channels | 4 | 6 | Determines how many independent signal inputs can be measured simultaneously; a direct constraint on system channel count. |
| Resolution | 24 bit | 24 bit | Both provide 24-bit resolution, so precision class is comparable for high-dynamic-range sensing. |
| Primary application focus | ECG / biopotential (integrated PGA, RLD, lead-off) | Precision sensor / general-purpose signal acquisition | The ADS1294 integrates ECG-specific functions (RLD, lead-off detection, respiration) that the ADS124S06 lacks, affecting direct substitutability in medical front-ends. |
| Programmable gain amplifier (PGA) | Integrated PGA, gains 1 to 12 | Integrated PGA, gains 1 to 128 | PGA gain range sets the smallest measurable signal; the wider gain range of the ADS124S06 suits low-level sensor signals. |
| Data output rate (max) | 32 kSPS per channel | 4 kSPS | Maximum sample rate limits bandwidth and timing resolution; the ADS1294 supports much faster sampling for high-rate biopotential capture. |
| Supply voltage | Analog 2.7 V to 5.25 V, digital 1.65 V to 3.6 V | Analog 2.7 V to 5.25 V, digital 2.7 V to 3.6 V | Supply rails must match the host system; the lower digital supply floor of the ADS1294 allows direct interfacing to 1.8 V logic. |
| Interface | SPI (daisy-chain capable) | SPI | Both use SPI, but the ADS1294 supports daisy-chaining for multi-device systems, which affects board-level architecture. |
| Package | 64-pin TQFP (PAG) | 32-pin TQFP (PBS) | Different footprints and pin counts mean the parts are not drop-in compatible; PCB layout must be redesigned. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +125 °C | The wider temperature range of the ADS124S06 enables use in harsher industrial environments. |
| Integrated features | RLD, lead-off detection, respiration impedance, internal oscillator | Internal oscillator, reference, IDAC, sensor biasing | On-chip feature sets differ substantially; ECG-specific blocks in the ADS1294 are absent in the ADS124S06, limiting functional substitution. |
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 | ADS124S06IPBSR | ADS1294IPAG |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 4k | - |
| Number of Inputs | 6 | - |
| 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 | - |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V | 1.65V ~ 3.6V |
| Features | PGA | - |
| Operating Temperature | -50°C ~ 125°C | - |
| Number of Channels | - | 4 |
| Power (Watts) | - | 10.1 mW |
| Mounting Type | - | Surface Mount |
Frequently asked questions
What are the primary functional differences between the ADS1294IPAG and the ADS124S06IPBSR?
The ADS1294IPAG is a 4-channel, 24-bit delta-sigma analog front-end (AFE) designed for biopotential measurements, integrating a programmable gain amplifier (PGA), internal reference, and ECG/EEG-specific features. The ADS124S06IPBSR is a 6-channel, 24-bit delta-sigma ADC intended for precision sensor and industrial measurement applications, featuring a PGA, internal reference, and a general-purpose input/output architecture without biopotential-specific circuitry.
Do the ADS1294IPAG and ADS124S06IPBSR have the same package and pinout?
No. The ADS1294IPAG is supplied in a 64-pin TQFP package, while the ADS124S06IPBSR is supplied in a 32-pin TQFP package. The pin counts, pin functions, and PCB land patterns differ, so they are not pin-to-pin compatible.
Can the ADS124S06IPBSR be used as a direct drop-in replacement for the ADS1294IPAG?
No. The two devices differ in channel count (4 vs. 6), package size (64-pin vs. 32-pin TQFP), pinout, and target application architecture. A direct drop-in replacement is not possible; any substitution requires a full schematic and layout redesign plus validation against the target design requirements.
How do the input channel configurations of the ADS1294IPAG and ADS124S06IPBSR compare?
The ADS1294IPAG provides 4 differential input channels optimized for biopotential signals with integrated ECG/EEG features. The ADS124S06IPBSR provides 6 input channels that can be configured as single-ended or differential inputs for general-purpose precision sensing. The channel count and input architecture are therefore not equivalent.
Are the ADS1294IPAG and ADS124S06IPBSR both 24-bit delta-sigma converters?
Yes. Both devices are 24-bit delta-sigma analog-to-digital converters. However, the ADS1294IPAG integrates a biopotential-oriented AFE, while the ADS124S06IPBSR is a general-purpose precision ADC with a PGA and flexible input multiplexer.
Which device is more appropriate for ECG or EEG signal acquisition?
The ADS1294IPAG is the more appropriate choice for ECG or EEG acquisition because it is specifically designed as a biopotential AFE with 4 channels and integrated features for electrophysiological measurement. The ADS124S06IPBSR is a general-purpose precision ADC and is not specifically architected for biopotential front-end requirements.
Which device is more suitable for general-purpose precision sensor measurement?
The ADS124S06IPBSR is more suitable for general-purpose precision sensor measurement, as it provides 6 flexible input channels, a PGA, and an internal reference in a compact 32-pin TQFP package. The ADS1294IPAG is specialized for biopotential applications and is not intended as a general-purpose sensor ADC.
Do both devices include an internal reference and programmable gain amplifier?
Yes. Both the ADS1294IPAG and the ADS124S06IPBSR integrate an internal reference and a programmable gain amplifier (PGA) to support direct connection of small-amplitude sensor signals. The specific gain ranges and reference specifications should be confirmed from the respective manufacturer datasheets.
What should be verified before considering a design migration between these two parts?
Before any migration, verify package and pinout compatibility, channel count and input configuration, PGA gain range, reference specifications, data rate and filter settings, power supply requirements, and digital interface timing against the official manufacturer datasheets. Because the devices target different application classes, a full schematic and layout redesign plus system-level validation is required.