Part A
ADS1298IPAGR
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 5329 PCS
- Package
- TQFP-64
- Series
- Data Acquisition - Analog Front End (AFE)
Replacement verdict
Compatible functional replacement candidate
The ADS1294IPAG and ADS1298IPAGR share the same TQFP-64 package, identical pinout, and the same ADS129x family architecture, making the ADS1298IPAGR a viable functional upgrade path for the ADS1294IPAG when additional input channels are required. The primary distinction is channel count (4 vs. 8), so designers must confirm that the host firmware, channel scanning configuration, and power budget accommodate the higher channel count before substituting.
Package Type
High match
Pinout Compatibility
High match
Channel Count
Validation required
Power Consumption
Validation required
Parts at a glance
Part B
ADS1294IPAG
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 1382 PCS
- Package
- TQFP-64
- Series
- Data Acquisition - 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 | ADS1298IPAGR | Why it matters |
|---|---|---|---|
| Number of input channels | 4 | 8 | Determines how many simultaneous ECG/EEG/biopotential signals can be acquired; a direct functional substitutability constraint. |
| Resolution | 24 bit | 24 bit | Both provide 24-bit delta-sigma conversion, so precision is equivalent and not a differentiator. |
| Data rate (max) | 32 kSPS | 32 kSPS | Maximum sample rate per channel affects bandwidth and timing compatibility in acquisition systems. |
| Integrated PGA gain range | 1 to 12 | 1 to 12 | Programmable gain determines input signal scaling and compatibility with different electrode/sensor amplitudes. |
| Supply voltage (analog) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Analog supply range must match the system power rail for direct board-level replacement. |
| Interface | SPI | SPI | Serial interface compatibility ensures the same host MCU/firmware can communicate with either device. |
| Package | TQFP-64 | TQFP-64 | Identical package and pin count support drop-in PCB compatibility. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ratings ensure equivalent environmental robustness for the target application. |
| Integrated features | PGA, internal reference, oscillator, respiration impedance measurement | PGA, internal reference, oscillator, respiration impedance measurement | On-chip integration reduces external component count and confirms functional equivalence beyond channel count. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1298IPAGR | ADS1294IPAG |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Number of Channels | 8 | 4 |
| Power (Watts) | 14.1 mW | 10.1 mW |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 1.65V ~ 3.6V | 1.65V ~ 3.6V |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the primary difference between the ADS1294IPAG and ADS1298IPAGR?
The ADS1294IPAG is a 4-channel, 24-bit delta-sigma analog front-end (AFE) for biopotential measurements, while the ADS1298IPAGR is an 8-channel device in the same family. Both integrate programmable gain amplifiers, internal oscillators, and ECG/EEG-specific features, but the ADS1298IPAGR provides twice the channel count for higher-density signal acquisition.
Are the ADS1294IPAG and ADS1298IPAGR pin-compatible?
No. The ADS1294IPAG is supplied in a 64-pin TQFP package (PAG suffix), whereas the ADS1298IPAGR is supplied in a 64-pin TQFP package as well but with a different channel configuration and pin function assignment. The 'R' suffix on the ADS1298IPAGR indicates tape-and-reel packaging. Pin functions and channel input assignments differ, so they are not drop-in replacements.
Do both devices support the same data rate and resolution?
Yes. Both the ADS1294IPAG and ADS1298IPAGR are 24-bit delta-sigma converters with programmable data rates from 250 SPS to 32 kSPS per channel, and both support the same digital filter and PGA settings as defined in the Texas Instruments ADS129x family datasheet.
What are the package and operating temperature specifications for these parts?
Both the ADS1294IPAG and ADS1298IPAGR are offered in a 64-pin TQFP package and are specified for operation over the industrial temperature range of -40°C to +85°C, per the Texas Instruments ADS129x datasheet.
Can the ADS1294IPAG be used as a substitute for the ADS1298IPAGR in an existing design?
Only if the design requires no more than 4 channels and the PCB layout, pin assignments, and firmware channel mapping are revalidated. Because the channel count and pin functions differ, a direct substitution without design changes is not supported by the manufacturer documentation.
What is the significance of the 'R' suffix on the ADS1298IPAGR?
The 'R' suffix indicates that the ADS1298IPAGR is shipped in tape-and-reel packaging for automated assembly, whereas the ADS1294IPAG (without the R) is supplied in tray or tube packaging. The silicon device itself is the same as the corresponding non-R orderable part.
Do both devices share the same SPI interface and register map structure?
Yes. Both the ADS1294IPAG and ADS1298IPAGR use a compatible SPI serial interface and share the same register map architecture as defined in the Texas Instruments ADS129x family datasheet, though the number of active channel registers differs according to channel count.