Part A
ADS131A02IPBSR
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 1696 PCS
- Package
- TQFP-32
- Series
- Data Acquisition - Analog Front End (AFE)
Replacement verdict
Compatible functional replacement candidate
The ADS131A02IPBSR is a functional replacement candidate for the ADS131A04IPBS in applications that can accept half the channel count. Both devices share the same TQFP-32 footprint, SPI interface, and 3.3 V analog supply architecture, but the ADS131A04IPBS provides four simultaneous 24-bit delta-sigma channels while the ADS131A02IPBSR provides two. Designers must confirm that reduced channel count and the corresponding lower power consumption are acceptable for the target signal chain before substituting.
Channel Count
Validation required
Package Type
High match
Digital Interface
High match
Supply Voltage
High match
Parts at a glance
Part B
ADS131A04IPBS
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 6302 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 | ADS131A04IPBS | ADS131A02IPBSR | Why it matters |
|---|---|---|---|
| Number of ADC Channels | 4 | 2 | Determines how many independent analog signals can be sampled simultaneously; a direct functional difference for multi-phase or multi-sensor designs. |
| Resolution | 24 bit | 24 bit | Both provide 24-bit delta-sigma conversion, so measurement precision and dynamic range are equivalent. |
| Maximum Sample Rate (per channel) | 128 kSPS | 128 kSPS | Identical throughput supports the same signal bandwidth and control-loop timing requirements. |
| Interface | SPI | SPI | Same serial interface allows drop-in compatibility with existing microcontroller firmware and bus wiring. |
| Supply Voltage (Analog/Digital) | 3.0 V to 3.6 V (AVDD), 1.65 V to 3.6 V (DVDD) | 3.0 V to 3.6 V (AVDD), 1.65 V to 3.6 V (DVDD) | Matching rails mean the same power tree and level shifting can be reused without redesign. |
| Package | 32-pin TQFP (PBS) | 32-pin TQFP (PBS) | Same footprint and pin count enable board-level interchangeability, though pin functions may differ. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical industrial temperature rating supports the same environmental qualification and reliability margins. |
| Internal Reference | Yes (2.442 V) | Yes (2.442 V) | On-chip reference eliminates external reference components and keeps gain calibration consistent between parts. |
| Power Consumption (typical) | ~6.5 mW per channel | ~6.5 mW per channel | Per-channel power is equivalent, but total device power scales with channel count, affecting thermal and battery budgets. |
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 | ADS131A02IPBSR | ADS131A04IPBS |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Number of Channels | 2 | 4 |
| Power (Watts) | 2.6 mW | - |
| Voltage - Supply, Analog | 3V ~ 3.45V | 3V ~ 5.5V |
| Voltage - Supply, Digital | 1.65V ~ 3.6V | 1.65V ~ 3.6V |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the ADS131A04IPBS and ADS131A02IPBSR?
The ADS131A04IPBS is a 4-channel, simultaneous-sampling, 24-bit delta-sigma ADC, while the ADS131A02IPBSR is a 2-channel version of the same family. Both share the same TQFP-32 (PBS) package, SPI interface, internal reference, and wide supply range, but differ in channel count and therefore in the number of differential inputs and data-rate-per-channel tradeoffs.
Are the ADS131A04IPBS and ADS131A02IPBSR pin-compatible?
Both devices are offered in the same 32-pin TQFP (PBS) package and belong to the same ADS131A0x family, so they share a common pinout architecture. However, because the channel count differs, some input pins are used differently between the two variants. Designers should verify pin functions against the respective datasheets before considering a layout swap.
Can the ADS131A02IPBSR be used as a drop-in replacement for the ADS131A04IPBS?
Not as a direct drop-in replacement in all designs. Although package and family architecture are shared, the ADS131A02IPBSR provides only 2 channels versus 4 channels on the ADS131A04IPBS. Any design requiring four simultaneous input channels cannot use the 2-channel device without redesigning the input stage and firmware channel mapping.
What is the resolution and architecture of both devices?
Both the ADS131A04IPBS and ADS131A02IPBSR are 24-bit, delta-sigma analog-to-digital converters with simultaneous sampling of all channels. They are designed for multiphase energy metering, power quality, and industrial monitoring applications requiring high-resolution, synchronized measurements.
Do both parts support the same SPI interface and supply voltages?
Yes. Both devices are members of the same ADS131A0x family and support an SPI-compatible serial interface along with an analog supply and a digital supply within the family-specified ranges. Designers should confirm exact supply and interface timing limits from the respective manufacturer datasheets for the chosen variant.
Which part should be selected for a 2-channel measurement design?
For a design requiring only two simultaneous measurement channels, the ADS131A02IPBSR is the appropriate choice because it provides 2 channels in the same TQFP-32 package family. The ADS131A04IPBS would provide two unused channels, adding cost and board complexity without functional benefit.
Are both devices available in the same package type?
Yes. Both the ADS131A04IPBS and ADS131A02IPBSR are supplied in the 32-pin TQFP (PBS) package, which supports consistent PCB footprint planning across the family. The "R" suffix on ADS131A02IPBSR denotes tape-and-reel packaging rather than a different package body.