Part A
ADS131A04IPBS
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 6302 PCS
- Package
- TQFP-32
- Series
- Data Acquisition - Analog Front End (AFE)
Replacement verdict
Compatible functional replacement candidate
The ADS131A02IPBS and ADS131A04IPBS share an identical TQFP-32 package, pinout, supply architecture, and SPI interface, differing only in channel count and corresponding power consumption. The ADS131A04IPBS can serve as a higher-channel-count functional replacement for the ADS131A02IPBS in the same footprint, provided the system firmware is reconfigured for four channels and the modest increase in current draw is validated against the power budget.
Package and Pinout
High match
Channel Count
Not compatible
Supply Voltage Range
High match
Power Consumption
Validation required
Parts at a glance
Part B
ADS131A02IPBS
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 7625 PCS
- Package
- TQFP-32
- 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 | ADS131A02IPBS | ADS131A04IPBS | Why it matters |
|---|---|---|---|
| Number of ADC channels | 2 | 4 | Determines how many independent analog signals can be sampled simultaneously; a direct functional substitutability constraint. |
| Resolution | 24 bits | 24 bits | Sets the dynamic range and precision of the conversion; identical resolution means comparable measurement fidelity. |
| Maximum sample rate | 128 kSPS | 128 kSPS | Defines the highest signal bandwidth the ADC can capture; matching rates support the same application bandwidth. |
| Supply voltage (analog) | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Must match the system power rail; identical analog supply ranges allow drop-in power compatibility. |
| Digital interface | SPI | SPI | Determines host communication compatibility; the same interface allows reuse of existing firmware and bus design. |
| Package | TQFP-32 | TQFP-32 | Affects PCB footprint and assembly; an identical package enables a shared layout. |
| Input type | Differential | Differential | Differential inputs improve noise immunity and common-mode rejection; both parts share this signal-conditioning behavior. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +125 °C | Defines the environmental envelope for reliable operation; matching ranges support the same application environments. |
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 | ADS131A04IPBS | ADS131A02IPBS |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Number of Channels | 4 | 2 |
| Voltage - Supply, Analog | 3V ~ 5.5V | 3V ~ 3.45V |
| Voltage - Supply, Digital | 1.65V ~ 3.6V | 1.65V ~ 3.6V |
| Mounting Type | Surface Mount | Surface Mount |
| Power (Watts) | - | 2.6 mW |
Frequently asked questions
What is the primary difference between the ADS131A02IPBS and ADS131A04IPBS?
The ADS131A02IPBS is a 2-channel simultaneous-sampling 24-bit delta-sigma ADC, while the ADS131A04IPBS is a 4-channel version of the same device family. Both share the same TQFP-32 (PBS) package, SPI interface, and internal feature set; the difference is the number of active analog input channels (2 versus 4).
Are the ADS131A02IPBS and ADS131A04IPBS pin-to-pin and package compatible?
Yes. Both devices are offered in the same 32-pin TQFP (PBS) package and belong to the same ADS131A0x family, so they share the same footprint and pinout. The ADS131A04IPBS uses the additional channel pins that are unused on the 2-channel ADS131A02IPBS.
Do both devices support the same SPI interface and data rate capabilities?
Yes. Both the ADS131A02IPBS and ADS131A04IPBS use a SPI-compatible serial interface and support the same family-level features, including simultaneous sampling of all channels and programmable data rates. The channel count is the distinguishing parameter, not the interface or throughput architecture.
Can I substitute an ADS131A04IPBS for an ADS131A02IPBS in an existing design?
Substitution is feasible only after validating the design against the datasheet. Because the devices share package and pinout, the 4-channel ADS131A04IPBS can populate a board designed for the ADS131A02IPBS, but firmware, channel configuration, and unused-input handling must be reviewed to confirm the extra channels do not affect operation.
Which device should be selected for a 2-channel vs 4-channel simultaneous-sampling application?
Select the ADS131A02IPBS when exactly two simultaneous-sampling channels are required, and the ADS131A04IPBS when four channels are needed. Choosing the 2-channel device avoids paying for unused channels, while the 4-channel device provides headroom for multi-phase or multi-sensor acquisition in the same footprint.
Do both parts share the same supply voltage and reference requirements?
Yes. As members of the same ADS131A0x family in the identical PBS package, the ADS131A02IPBS and ADS131A04IPBS share the same analog and digital supply architecture and external reference requirements. Designers should still confirm exact voltage ranges and reference specifications against the respective manufacturer datasheets.