Part A
ADS127L01IPBSR
Texas Instruments
- Lifecycle
- Active
- Stock
- 3034 Stückzahl
- Package
- TQFP-32
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1298IPAG and ADS127L01IPBSR are not drop-in replacements for one another. The ADS1298IPAG is an 8-channel, 24-bit simultaneous-sampling biopotential front end with integrated programmable gain amplifiers and a delta-sigma architecture tailored for ECG and EEG signal chains, while the ADS127L01IPBSR is a single-channel, 24-bit wide-bandwidth delta-sigma ADC optimized for high-speed precision data acquisition. They differ fundamentally in channel count, integrated analog front-end functionality, package footprint, and target application, so a direct substitution is not feasible without a full system redesign.
Different channel count
Different integrated AFE
Different package footprint
Different target application
Parts at a glance
Part B
ADS1298IPAG
Texas Instruments
- Lifecycle
- Active
- Stock
- 4633 Stückzahl
- Package
- TQFP-64
- Series
- Datenerfassung mit dem 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 | ADS1298IPAG | ADS127L01IPBSR | Why it matters |
|---|---|---|---|
| Number of ADC Channels | 8 | 1 | Determines how many simultaneous signal inputs can be digitized; the ADS1298 is an 8-channel device while the ADS127L01 is single-channel, so they are not functionally interchangeable for multi-channel acquisition. |
| Resolution | 24 bit | 24 bit | Both provide 24-bit resolution, so precision class is comparable, but resolution alone does not guarantee substitutability given architectural differences. |
| Maximum Data Rate | 32 kSPS | 512 kSPS | The ADS127L01 supports much higher sampling rates, making it suitable for wider-bandwidth signals, whereas the ADS1298 is optimized for lower-rate biopotential acquisition. |
| Input Type | Differential (with PGA and internal mux) | Differential | The ADS1298 integrates a programmable gain amplifier and input multiplexer for direct sensor connection, while the ADS127L01 relies on external signal conditioning, affecting system-level design. |
| Integrated PGA | Yes | No | An integrated PGA simplifies small-signal acquisition without external amplifiers; its absence in the ADS127L01 requires additional front-end circuitry. |
| Supply Voltage | 2.7 V to 5.25 V (analog), 1.65 V to 3.6 V (digital) | 2.7 V to 3.6 V (analog), 1.7 V to 3.6 V (digital) | Different supply ranges affect power-rail compatibility; the ADS1298 tolerates higher analog supply voltages than the ADS127L01. |
| Interface | SPI | SPI | Both use SPI, so host-side digital interfacing is similar, though register maps and command sets differ. |
| Package | 64-TQFP (PAG) | 32-TQFP (PBS) | Different package footprints and pin counts prevent direct board-level drop-in replacement without layout changes. |
| Typical Application Focus | Biopotential / ECG / EEG acquisition | High-speed precision data acquisition | The devices target different application domains, so functional substitutability is limited even where electrical specs overlap. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS127L01IPBSR | ADS1298IPAG |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 512k | - |
| Number of Inputs | 1 | - |
| Input Type | Differential | - |
| Data Interface | SPI | - |
| Configuration | ADC | - |
| Number of A/D Converters | 1 | - |
| Architecture | Sigma-Delta | - |
| Reference Type | External | - |
| Voltage - Supply, Analog | 2.7V ~ 3.6V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 1.7V ~ 3.6V | 1.65V ~ 3.6V |
| Operating Temperature | -40°C ~ 125°C | - |
| Number of Channels | - | 8 |
| Power (Watts) | - | 14.1 mW |
| Mounting Type | - | Surface Mount |
Frequently asked questions
What are the primary functional differences between the ADS1298IPAG and the ADS127L01IPBSR?
The ADS1298IPAG is an 8-channel, simultaneous-sampling, 24-bit delta-sigma ADC with integrated programmable gain amplifiers (PGAs), internal reference, and ECG/EEG-specific features such as lead-off detection and respiration impedance measurement, housed in a 64-pin TQFP. The ADS127L01IPBSR is a single-channel, 24-bit delta-sigma ADC optimized for wide-bandwidth, low-latency signal acquisition with a maximum data rate of 512 kSPS, housed in a 32-pin TQFP. The ADS1298 targets biopotential and multi-channel sensor applications, while the ADS127L01 targets high-speed precision measurement and industrial data acquisition.
Do the ADS1298IPAG and ADS127L01IPBSR have compatible package footprints?
No. The ADS1298IPAG uses a 64-pin TQFP package, while the ADS127L01IPBSR uses a 32-pin TQFP package. The pin counts, pin functions, and PCB land patterns differ, so the two devices are not footprint-compatible and cannot be interchanged on the same PCB layout without redesign.
How do the maximum data rates of the ADS1298IPAG and ADS127L01IPBSR compare?
The ADS1298IPAG supports programmable output data rates up to 32 kSPS per channel. The ADS127L01IPBSR supports output data rates up to 512 kSPS. The ADS127L01 therefore offers a significantly higher maximum data rate, which suits wide-bandwidth signal acquisition, whereas the ADS1298 is intended for lower-frequency biopotential signals.
How do the input channel configurations of the ADS1298IPAG and ADS127L01IPBSR differ?
The ADS1298IPAG provides 8 simultaneous-sampling input channels, each with an integrated PGA, making it suitable for multi-channel biopotential recording. The ADS127L01IPBSR is a single-channel ADC, so multi-channel systems require external multiplexing or multiple devices. This difference is a key selection criterion when comparing the two parts.
Do both the ADS1298IPAG and ADS127L01IPBSR include an integrated voltage reference?
Yes. The ADS1298IPAG includes an integrated internal reference, and the ADS127L01IPBSR also integrates an internal reference. Both devices can therefore operate with an internal reference, though external references may be used depending on the accuracy and drift requirements of the application. Designers should consult the respective datasheets for reference specifications.
What are the typical application areas for the ADS1298IPAG versus the ADS127L01IPBSR?
The ADS1298IPAG is typically used in medical and biopotential instrumentation such as ECG, EEG, and patient monitoring systems, where multi-channel simultaneous sampling and integrated front-end features are required. The ADS127L01IPBSR is typically used in industrial measurement, vibration and acoustic analysis, power quality monitoring, and other precision data-acquisition applications requiring higher bandwidth and lower latency.
Can the ADS1298IPAG and ADS127L01IPBSR be used interchangeably in an existing design?
No. The two devices differ in channel count, package and pinout, maximum data rate, and integrated feature set. They are not pin-compatible or functionally equivalent, so substituting one for the other requires a redesign of the PCB, signal chain, and firmware. Selection should be based on the specific channel count, bandwidth, and integration requirements of the application.