Part A
ADS124S06IPBS
Texas Instruments
- Lifecycle
- Active
- Stock
- 2820 PCS
- Package
- TQFP-32
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1294IPAGR and ADS124S06IPBS are not drop-in replacements for one another. The ADS1294IPAGR is a four-channel simultaneous-sampling biopotential front end with integrated programmable gain amplifiers and a delta-sigma modulator, while the ADS124S06IPBS is a six-channel multiplexed precision delta-sigma ADC without integrated PGAs. Their channel architecture, input configuration, package footprint, and target application domains differ substantially, so substituting one for the other requires a full redesign of the analog front end rather than a direct board swap.
Different channel architecture
Different input configuration
Different package footprint
Different application domain
Parts at a glance
Part B
ADS1294IPAGR
Texas Instruments
- Lifecycle
- Active
- Stock
- 4357 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 | ADS1294IPAGR | ADS124S06IPBS | Why it matters |
|---|---|---|---|
| Number of input channels | 4 differential (8 single-ended) | 6 differential (12 single-ended) | Channel count determines how many signals can be measured simultaneously; a mismatch affects system architecture and multiplexing needs. |
| Resolution | 24-bit | 24-bit | Both are 24-bit delta-sigma ADCs, so nominal resolution is equivalent for high-precision measurement. |
| Primary application focus | ECG / biopotential (integrated PGA, RLD, lead-off) | Precision sensor / general-purpose signal acquisition | The ADS1294 includes ECG-specific features (RLD, lead-off detection, respiration) that the ADS124S06 lacks, so they are not drop-in substitutes for biopotential front ends. |
| Programmable gain amplifier (PGA) | Integrated PGA, gains 1 to 12 | Integrated PGA, gains 1 to 128 | Higher PGA gain range on the ADS124S06 allows amplification of very small sensor signals, while the ADS1294 gain range is tailored to biopotential amplitudes. |
| Data output rate (max) | Up to 32 kSPS per channel | Up to 4 kSPS | Maximum sample rate limits bandwidth and timing resolution; the ADS1294 supports higher throughput needed for multi-channel ECG. |
| 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 | Digital supply range differs; the ADS1294 can interface at lower logic levels (down to 1.65 V), affecting host MCU compatibility. |
| Integrated features | Right-leg drive (RLD), lead-off detection, respiration impedance, internal reference, oscillator | Internal reference, oscillator, IDAC current sources, sensor biasing | Feature sets target different applications; ECG-specific blocks in the ADS1294 are absent in the ADS124S06, preventing direct functional substitution. |
| Package | TQFP-64 (PAG) | TQFP-32 (PBS) | Different package footprints and pin counts require PCB redesign; they are not pin-compatible. |
| Interface | SPI (daisy-chain capable) | SPI | Both use SPI, but the ADS1294 supports daisy-chaining for multi-device systems, which the ADS124S06 does not. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +125 °C | The wider temperature range of the ADS124S06 suits harsher industrial environments, while the ADS1294 is limited to standard commercial/industrial ranges. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS124S06IPBS | ADS1294IPAGR |
|---|---|---|
| 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 ADS1294IPAGR and the ADS124S06IPBS?
The ADS1294IPAGR is a 4-channel, 24-bit delta-sigma analog front end (AFE) designed for biopotential measurements, integrating programmable gain amplifiers, internal reference, and ECG/EEG-specific features. The ADS124S06IPBS is a 6-channel, 24-bit delta-sigma ADC intended for precision sensor and industrial measurement applications, with a flexible input multiplexer and PGA but without the biopotential-specific circuitry of the ADS1294.
Do the ADS1294IPAGR and ADS124S06IPBS have the same package and pinout?
No. The ADS1294IPAGR is supplied in a 64-pin TQFP package (PAG suffix), while the ADS124S06IPBS is supplied in a 32-pin TQFP package (PBS suffix). The pin counts, pin functions, and PCB land patterns differ, so they are not pin-to-pin compatible.
Can the ADS124S06IPBS directly replace the ADS1294IPAGR in an existing design?
No. Beyond the different package and pinout, the two devices differ in channel count (4 vs 6), input architecture, integrated biopotential features, and register map. A direct drop-in replacement is not possible; a redesign and firmware changes would be required.
What are the input channel configurations of each device?
The ADS1294IPAGR provides 4 differential input channels optimized for biopotential signal acquisition. The ADS124S06IPBS provides 6 input channels that can be configured as single-ended or differential inputs through its input multiplexer, offering flexibility for general-purpose precision sensing.
Which device is better suited for ECG or EEG applications?
The ADS1294IPAGR is specifically designed for biopotential applications such as ECG and EEG, featuring integrated features tailored to those use cases. The ADS124S06IPBS is a general-purpose precision ADC and is not specifically targeted at biopotential front-end applications.
Do both devices support an internal reference and programmable gain amplifier?
Yes. Both the ADS1294IPAGR and the ADS124S06IPBS integrate an internal reference and a programmable gain amplifier (PGA) to support a range of input signal amplitudes without external components.
What supply voltage ranges do these devices support?
Both devices operate from an analog supply in the range of approximately 2.7 V to 5.25 V and a digital supply in the range of approximately 1.8 V to 3.6 V, consistent with their respective manufacturer datasheets. Designers should confirm exact limits against the latest official datasheet for each part.
Are the ADS1294IPAGR and ADS124S06IPBS interchangeable in terms of communication interface?
Both devices provide an SPI-compatible serial interface, but their register maps, command sets, and data output formats differ. Firmware written for one device cannot be used unchanged with the other; the interface protocol must be adapted to each device's specific register structure.