Part A
ADS131E04IPAG
Texas Instruments
- Lifecycle
- Active
- Stock
- 5221 PCS
- Package
- TQFP-64
- Series
- Acquisição de dados - Front End analógico (AFE)
Replacement verdict
Not a drop-in replacement
The ADS131A02IPBS and ADS131E04IPAG are not drop-in replacements for one another. Although both are multichannel delta-sigma ADCs from the same family, they differ in channel count, resolution, package footprint, and digital interface, so a direct board-level substitution is not possible without redesign.
Different channel count
Different resolution
Different package footprint
Different digital interface
Parts at a glance
Part B
ADS131A02IPBS
Texas Instruments
- Lifecycle
- Active
- Stock
- 7625 PCS
- Package
- TQFP-32
- Series
- Acquisição de dados - Front End analógico (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 | ADS131E04IPAG | Why it matters |
|---|---|---|---|
| Number of ADC channels | 2 | 4 | Channel count determines how many independent signals can be measured simultaneously; a 4-channel part cannot directly replace a 2-channel design without unused inputs being handled. |
| Resolution (bits) | 24 | 24 | Both are 24-bit delta-sigma converters, so nominal resolution is equivalent, but actual performance depends on other parameters such as data rate and PGA settings. |
| Maximum data rate (SPS) | 128000 | 64000 | Higher sample rates allow wider signal bandwidth and faster transient capture; a lower-rate device may not meet timing requirements of the original design. |
| Interface type | SPI (with CRC and daisy-chain support) | SPI | Both use SPI, but protocol details and feature sets differ; firmware and host controller timing may need adjustment when substituting. |
| Supply voltage (analog) | 3.0 V to 3.6 V (single supply) | 2.7 V to 5.25 V (analog), 1.8 V to 3.6 V (digital) | Supply range affects compatibility with existing power rails; the wider analog range of the ADS131E04 offers more flexibility but requires rail verification. |
| Package | TQFP-32 | TQFP-64 | Different package footprints and pin counts prevent direct board-level drop-in replacement without a PCB redesign or adapter. |
| Integrated PGA | Yes | Yes | Both include programmable gain amplifiers, enabling direct connection of small signals, but gain ranges and settings should be compared for the target application. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +85 °C | The narrower temperature range of the ADS131E04 may limit use in harsh or industrial environments where the original part was specified. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS131E04IPAG | ADS131A02IPBS |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 16, 24 | 24 |
| Number of Channels | 4 | 2 |
| Power (Watts) | 10.2 mW | 2.6 mW |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 3V ~ 3.45V |
| Voltage - Supply, Digital | 1.8V ~ 3.6V | 1.65V ~ 3.6V |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary functional differences between the ADS131A02IPBS and the ADS131E04IPAG?
The ADS131A02IPBS is a 2-channel, simultaneous-sampling, 24-bit delta-sigma ADC with a maximum data rate of 128 kSPS, designed for energy metering, power quality, and protection applications. The ADS131E04IPAG is a 4-channel, simultaneous-sampling, 24-bit delta-sigma ADC with a maximum data rate of 64 kSPS, designed for biopotential measurements, industrial monitoring, and power metering. The ADS131A02IPBS offers higher per-channel throughput and hardware-based security features, while the ADS131E04IPAG provides twice the channel count at a lower maximum data rate.
Are the ADS131A02IPBS and ADS131E04IPAG pin-to-pin compatible?
No. The ADS131A02IPBS is supplied in a 32-pin TQFP package (PBS suffix), while the ADS131E04IPAG is supplied in a 64-pin TQFP package (PAG suffix). The two devices have different pin counts, pin functions, and PCB land patterns, so they cannot be used as direct drop-in replacements for each other.
How do the maximum data rates of the ADS131A02IPBS and ADS131E04IPAG compare?
The ADS131A02IPBS supports a maximum data rate of 128 kSPS per channel. The ADS131E04IPAG supports a maximum data rate of 64 kSPS per channel. The ADS131A02IPBS therefore provides twice the maximum per-channel throughput of the ADS131E04IPAG.
What are the channel counts and input configurations of these two ADCs?
The ADS131A02IPBS provides 2 simultaneous-sampling differential input channels. The ADS131E04IPAG provides 4 simultaneous-sampling differential input channels. Both devices integrate a programmable gain amplifier (PGA) per channel and an internal reference, but the ADS131E04IPAG offers twice the channel density for multi-channel signal acquisition.
Do the ADS131A02IPBS and ADS131E04IPAG support the same serial interface?
Both devices support SPI-compatible serial interfaces for register configuration and data readout. However, the ADS131A02IPBS includes additional hardware security and diagnostic features, such as CRC-based communication verification and register map protection, that are not present on the ADS131E04IPAG. The exact frame formats and register maps differ between the two devices and must be verified against their respective datasheets.
What are the typical target applications for each device?
The ADS131A02IPBS is typically used in energy metering, power quality monitoring, protection relays, and industrial sensor interfaces where high per-channel throughput and hardware security are required. The ADS131E04IPAG is typically used in biopotential measurement (ECG, EEG), industrial process monitoring, and multi-channel power metering where four simultaneous channels are needed at moderate data rates.
Can the ADS131A02IPBS and ADS131E04IPAG operate from the same supply voltages?
Both devices support analog supply voltages in the range of 3.0 V to 5.5 V and digital supply voltages in the range of 1.8 V to 3.6 V, as specified in their respective datasheets. However, the exact recommended operating conditions, power consumption, and internal reference specifications differ between the two devices and should be confirmed from the manufacturer datasheets before design reuse.