Part A
ADS131E04IPAG
德州儀器
- Lifecycle
- Active
- Stock
- 5221 件
- Package
- TQFP-64
- Series
- 資料獲取-類比前端（AFE）
Replacement verdict
Not a drop-in replacement
The ADS131A02IPBSR and ADS131E04IPAG are not drop-in replacements for one another. Although both are delta-sigma ADC devices from Texas Instruments, they differ in channel count, resolution, package footprint, and digital interface architecture, so a direct board-level substitution is not feasible without redesign.
Different channel count
Different resolution
Different package footprint
Different digital interface
Parts at a glance
Part B
ADS131A02IPBSR
德州儀器
- Lifecycle
- Active
- Stock
- 1696 件
- Package
- TQFP-32
- Series
- 資料獲取-類比前端（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 | ADS131A02IPBSR | ADS131E04IPAG | Why it matters |
|---|---|---|---|
| Number of ADC channels | 2 | 4 | Channel count determines how many independent signals can be sampled simultaneously; a 4-channel part cannot directly replace a 2-channel design without reworking the analog front end. |
| Resolution | 24 bit | 24 bit | Both are 24-bit delta-sigma converters, so dynamic range and LSB size are comparable, which is favorable for substitutability in precision measurement paths. |
| Maximum sample rate | 128 kSPS | 64 kSPS | The higher sample rate of the ADS131A02 supports faster signal capture; a slower replacement may not meet bandwidth or oversampling requirements of the original design. |
| Interface type | SPI (serial) | SPI (serial) | Both use a serial SPI interface, so the host microcontroller connection is largely compatible, though register maps and command sets differ. |
| Supply voltage (analog) | 2.7 V to 3.6 V | 2.7 V to 5.25 V | The wider analog supply range of the ADS131E04 allows operation at 5 V for larger input swing, while the ADS131A02 is limited to 3.6 V, affecting input range and compatibility. |
| Package | TQFP-32 | TQFP-64 | Different package footprints and pin counts mean the two parts are not drop-in compatible; a PCB redesign is required to substitute one for the other. |
| Internal PGA | Yes | Yes | Both integrate a programmable gain amplifier, allowing direct connection of low-level sensors without external front-end gain stages. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +105 °C | The ADS131A02 supports a higher upper temperature limit, which matters for industrial or automotive environments where the ADS131E04 may be marginal. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS131E04IPAG | ADS131A02IPBSR |
|---|---|---|
| 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 ADS131A02IPBSR and the ADS131E04IPAG?
The ADS131A02IPBSR is a 2-channel, simultaneous-sampling, 24-bit delta-sigma ADC from Texas Instruments, while the ADS131E04IPAG is a 4-channel, simultaneous-sampling, 24-bit delta-sigma ADC from the same family. The ADS131A02IPBSR is supplied in a TQFP-32 package, whereas the ADS131E04IPAG is supplied in a TQFP-64 package. The ADS131E04IPAG provides two additional input channels and additional GPIO and internal features compared with the ADS131A02IPBSR.
Are the ADS131A02IPBSR and ADS131E04IPAG pin-to-pin compatible?
No. The ADS131A02IPBSR uses a 32-pin TQFP package and the ADS131E04IPAG uses a 64-pin TQFP package. The pin counts, pin assignments, and package footprints differ, so they are not drop-in replacements for each other.
Do both devices support simultaneous sampling of all input channels?
Yes. Both the ADS131A02IPBSR and the ADS131E04IPAG are simultaneous-sampling delta-sigma ADCs, meaning all of their respective input channels are sampled at the same time. The ADS131A02IPBSR samples 2 channels simultaneously, and the ADS131E04IPAG samples 4 channels simultaneously.
What is the resolution and data rate capability of each device?
Both devices are 24-bit delta-sigma ADCs. The ADS131A02IPBSR supports programmable data rates up to 128 kSPS per channel, and the ADS131E04IPAG supports programmable data rates up to 64 kSPS per channel. Designers should confirm the exact data-rate range and filter settings against the respective Texas Instruments datasheets for the target configuration.
Can the ADS131A02IPBSR be used as a substitute for the ADS131E04IPAG in an existing design?
Not directly. Because the two devices differ in channel count (2 vs 4), package (TQFP-32 vs TQFP-64), and pinout, a direct substitution is not possible. Any replacement requires a PCB redesign, revalidation of the analog front end, and confirmation that the reduced channel count and different data-rate limits meet the application requirements.
What are the typical applications for these two ADC families?
Both devices are intended for precision, multi-channel signal acquisition such as industrial process control, power monitoring and metering, medical instrumentation, and test and measurement equipment. The ADS131E04IPAG, with four channels, is suited to applications needing more simultaneous inputs, while the ADS131A02IPBSR suits compact designs requiring two simultaneous channels.
Do both parts operate from the same supply voltage range?
Both devices are designed for low-voltage operation with an analog supply in the 3.0 V to 5.5 V range and a digital supply in the 1.8 V to 3.6 V range, consistent with the Texas Instruments ADS131 family. Exact minimum and maximum limits, including any differences between the two part numbers, should be verified in the respective datasheets before finalizing a design.