Part A
ADS131A02IPBSR
Texas Instruments
- Lifecycle
- Active
- Stock
- 1696 Stückzahl
- Package
- TQFP-32
- Series
- Datenerfassung mit dem Analog Front End (AFE)
Replacement verdict
Compatible functional replacement candidate
The ADS131A02IPBSR is a functional subset of the ADS131A04IPBSR, sharing the same package, pinout, supply architecture, and SPI interface while providing two instead of four simultaneous 24-bit delta-sigma ADC channels. It is a viable replacement only where the reduced channel count is acceptable; designs requiring four concurrent channels must retain the ADS131A04IPBSR.
Channel Count
Not compatible
Package and Pinout
High match
Supply Voltage Range
High match
Digital Interface
High match
Parts at a glance
Part B
ADS131A04IPBSR
Texas Instruments
- Lifecycle
- Active
- Stock
- 3693 Stückzahl
- Package
- TQFP-32
- 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 | ADS131A04IPBSR | ADS131A02IPBSR | Why it matters |
|---|---|---|---|
| Number of ADC Channels | 4 | 2 | Determines how many independent analog signals can be sampled simultaneously; a 2-channel device cannot replace a 4-channel one in multi-phase or multi-sensor designs. |
| Resolution | 24 bits | 24 bits | Both provide the same delta-sigma resolution, so measurement precision and dynamic range are equivalent. |
| Maximum Data Rate (per channel) | 128 kSPS | 128 kSPS | Identical throughput supports the same sampling bandwidth for control-loop and metering applications. |
| Supply Voltage (AVDD) | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Matching analog supply range allows the same power rail design and decoupling to be reused. |
| Digital Interface | SPI (up to 25 MHz) | SPI (up to 25 MHz) | Same serial interface and clock rate means firmware and host MCU connections remain compatible. |
| Package | 32-pin TQFP (PBS) | 32-pin TQFP (PBS) | Identical footprint and pinout family simplify PCB layout substitution, though pin functions tied to channel count must be checked. |
| Internal PGA Gain Options | 1, 2, 4, 8, 16, 32, 64 | 1, 2, 4, 8, 16, 32, 64 | Same programmable gain settings preserve signal scaling for low-level sensor inputs. |
| Typical Power Consumption | Higher (4 channels active) | Lower (2 channels active) | Fewer active channels reduce current draw, which matters for power-budget-constrained or battery-powered designs. |
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 | ADS131A04IPBSR |
|---|---|---|
| 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 is the primary difference between the ADS131A04IPBSR and the ADS131A02IPBSR?
The ADS131A04IPBSR 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 package, SPI interface, and internal feature set, but differ in the number of active analog input channels.
Are the ADS131A04IPBSR and ADS131A02IPBSR pin-compatible?
Yes. Both devices are offered in the same 32-pin TQFP (PBS) package and share the same pinout. The ADS131A02IPBSR simply does not bond out the additional channel inputs present on the ADS131A04IPBSR, so the package footprint and land pattern are identical.
Can the ADS131A02IPBSR be used as a drop-in replacement for the ADS131A04IPBSR?
Only if the application requires no more than two analog input channels. The devices are pin-compatible and share the same register map and SPI protocol, but the ADS131A02IPBSR provides only 2 channels versus 4 on the ADS131A04IPBSR, so any design using channels 3 and 4 must be revalidated.
Do both devices support the same data rate and resolution?
Yes. Both the ADS131A04IPBSR and ADS131A02IPBSR are 24-bit delta-sigma ADCs with programmable data rates up to 128 kSPS per channel and simultaneous sampling across all active channels. Resolution and noise performance per channel are equivalent between the two variants.
Do both parts use the same digital interface and supply requirements?
Yes. Both devices use a SPI-compatible serial interface and support an analog supply (AVDD) and digital supply (DVDD) within the same specified ranges per the TI datasheet. The register map and communication protocol are identical, so firmware developed for one variant applies to the other with channel-count adjustments.
Which part should be selected for a design requiring four simultaneous current or voltage measurements?
The ADS131A04IPBSR should be selected, as it provides 4 simultaneous-sampling channels in a single package. The ADS131A02IPBSR only offers 2 channels and would require an additional device to cover four measurement channels.
Are both devices available in the same operating temperature range and package?
Yes. Both the ADS131A04IPBSR and ADS131A02IPBSR are supplied in the TQFP-32 (PBS) package with an industrial temperature range as specified in the TI datasheet. The "IPBSR" suffix indicates the same package and temperature grade for both variants.