Part A
ADS127L01IPBS
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 1330 PCS
- Package
- TQFP-32
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS124S08IPBS and ADS127L01IPBS are both 24-bit delta-sigma ADCs in a TQFP-32 package, but they differ in channel count, sample rate, and interface configuration. The ADS127L01IPBS offers a higher maximum data rate and a wider digital supply range, while the ADS124S08IPBS provides more input channels and integrated PGA functionality. Designers should validate channel requirements, timing, and digital interface compatibility before substituting one for the other in a given application.
Channel Count
Validation required
Maximum Sample Rate
Validation required
Package Type
High match
Digital Interface
Validation required
Parts at a glance
Part B
ADS124S08IPBS
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 3448 PCS
- Package
- TQFP-32
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS124S08IPBS | ADS127L01IPBS | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit delta-sigma ADCs, so resolution alone does not distinguish them for substitutability. |
| Architecture | Delta-Sigma (low-speed, high-resolution, multiplexed) | Delta-Sigma (wide-bandwidth, low-latency) | The ADS124S08 targets precision sensor measurement with input multiplexing, while the ADS127L01 targets wide-bandwidth AC/precision applications; architecture dictates the application fit. |
| Number of input channels | 12 (single-ended) / 6 (differential) | 1 (differential) | The ADS124S08 integrates a multiplexer for multi-sensor systems, whereas the ADS127L01 is a single-channel device, which is a major functional difference. |
| Maximum sample rate | 4 kSPS | 512 kSPS | The ADS127L01 supports much higher throughput for wide-bandwidth signals, while the ADS124S08 is optimized for slower, high-precision measurements. |
| Interface | SPI | SPI | Both use SPI, so digital host interfacing is compatible, easing board-level substitution. |
| Supply voltage (analog) | 2.7 V to 5.25 V (AVDD) | 2.7 V to 3.6 V (AVDD) | The ADS124S08 tolerates a wider analog supply range, which can matter in 5 V systems where the ADS127L01 would not be usable. |
| Integrated PGA | Yes (low-noise PGA) | No | The ADS124S08's integrated PGA allows direct connection of small sensor signals, while the ADS127L01 requires external signal conditioning. |
| Package | TQFP-32 | TQFP-32 | Identical package and pin count simplify PCB footprint compatibility, though pinouts must still be verified. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +125 °C | Both cover the industrial temperature range, so environmental robustness is equivalent. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS127L01IPBS | ADS124S08IPBS |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 512k | 4k |
| Number of Inputs | 1 | 12 |
| Input Type | Differential | Single Ended |
| Data Interface | SPI | SPI |
| Configuration | ADC | MUX-PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 3.6V | 2.7V ~ 5.25V |
| Voltage - Supply, Digital | 1.7V ~ 3.6V | 2.7V ~ 3.6V |
| Operating Temperature | -40°C ~ 125°C | -50°C ~ 125°C |
| Ratio - S / H: ADC | - | 0:1 |
| Features | - | PGA |
Frequently asked questions
Are the ADS124S08IPBS and ADS127L01IPBS pin-to-pin compatible?
No. Both devices are offered in a TQFP-32 package, but they are different converter architectures with different pin functions and internal signal paths. The ADS124S08IPBS is a 24-bit delta-sigma ADC with an integrated PGA and multiplexer, while the ADS127L01IPBS is a 24-bit wide-bandwidth delta-sigma ADC. Pin assignments and external component requirements differ, so they are not direct drop-in replacements.
What are the key architectural differences between the ADS124S08IPBS and ADS127L01IPBS?
The ADS124S08IPBS integrates a low-noise PGA, an input multiplexer, a voltage reference, and an oscillator, making it suited to multi-channel sensor measurement. The ADS127L01IPBS is a wide-bandwidth delta-sigma converter optimized for higher sampling rates and AC precision, without an integrated PGA or input multiplexer. Selection depends on whether the application prioritizes channel count and sensor interfacing or wideband signal fidelity.
How do the maximum output data rates of the ADS124S08IPBS and ADS127L01IPBS compare?
The ADS124S08IPBS supports programmable data rates up to 4 kSPS in its high-resolution modes. The ADS127L01IPBS supports significantly higher output data rates, reaching up to 512 kSPS in wideband mode. The ADS127L01IPBS is therefore preferable for higher-frequency signal acquisition, while the ADS124S08IPBS targets lower-speed, high-resolution sensor applications.
Do both devices support an external voltage reference?
Yes. Both the ADS124S08IPBS and ADS127L01IPBS support external voltage references. The ADS124S08IPBS also includes an integrated reference, whereas the ADS127L01IPBS relies on an external reference for its conversion. Designers should verify reference requirements and decoupling per the respective datasheets.
Which device is better suited for multi-channel sensor measurement?
The ADS124S08IPBS is better suited for multi-channel sensor measurement because it integrates an input multiplexer and a PGA, allowing multiple sensor inputs to be sequenced and conditioned without external front-end components. The ADS127L01IPBS lacks an integrated multiplexer and PGA, so multi-channel designs would require external signal conditioning and switching.
How do the power supply requirements of the ADS124S08IPBS and ADS127L01IPBS differ?
Both devices use separate analog and digital supplies, but the exact voltage ranges and current consumption differ and must be confirmed from the respective datasheets. The ADS124S08IPBS is designed for low-power sensor systems, while the ADS127L01IPBS targets higher-speed conversion and typically consumes more power. Designers should verify supply rails and decoupling against the manufacturer documentation for each part.
Can the ADS124S08IPBS and ADS127L01IPBS share the same SPI interface configuration?
Both devices provide an SPI-compatible serial interface, but register maps, command sets, and timing parameters differ. Firmware written for one device cannot be reused unchanged for the other. The interface configuration must be implemented according to each device's datasheet.
What factors should be considered when choosing between the ADS124S08IPBS and ADS127L01IPBS?
Selection should be based on required data rate, channel count, need for an integrated PGA and multiplexer, AC versus DC precision requirements, power budget, and external component count. The ADS124S08IPBS suits low-speed, multi-channel, high-resolution sensor applications, while the ADS127L01IPBS suits wideband, higher-speed precision acquisition. Final selection must be validated against the manufacturer datasheets for both parts.