Part A
ADS131E08IPAGR
Texas Instruments
- Lifecycle
- Active
- Stock
- 6530 PCS
- Package
- TQFP-64
- Series
- Acquisição de dados - Front End analógico (AFE)
Replacement verdict
Not a drop-in replacement
The ADS131A02IPBS and ADS131E08IPAGR are not drop-in replacements for one another. The ADS131A02IPBS is a 2-channel, 24-bit simultaneous-sampling delta-sigma ADC in a 32-pin TQFP package, while the ADS131E08IPAGR is an 8-channel, 24-bit simultaneous-sampling delta-sigma ADC in a 64-pin TQFP package. The differences in channel count, package footprint, and pinout make them functionally incompatible as direct substitutes; a redesign of the PCB and signal chain would be required to interchange them.
Different channel count
Different package footprint
Different pinout
Different input configuration
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 | ADS131E08IPAGR | Why it matters |
|---|---|---|---|
| Number of ADC channels | 2 | 8 | Channel count determines how many independent analog signals can be sampled simultaneously, directly affecting system architecture and whether the part can serve multi-electrode or multi-phase sensing needs. |
| Resolution | 24 bit | 24 bit | Both offer 24-bit delta-sigma conversion, so dynamic range and precision class are comparable, which is critical for low-amplitude biopotential and energy-metering signals. |
| Maximum sample rate (per channel) | 128 kSPS | 64 kSPS | Sample rate bounds the signal bandwidth that can be captured; the higher rate of the ADS131A02 supports wider-bandwidth or faster-responding measurements. |
| Interface | SPI | SPI | Both use a serial SPI interface, so host MCU/FPGA connectivity and firmware driver structure remain largely compatible across the two parts. |
| 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 power-rail design and compatibility with existing system voltages; the wider analog range of the ADS131E08 allows higher-voltage front-end biasing. |
| Package | 32-pin TQFP (PBS) | 64-pin TQFP (PAG) | Package footprint and pin count dictate PCB layout, thermal behavior, and whether a drop-in replacement is physically possible. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +105 °C | The temperature range defines the environments in which the device can be reliably deployed; the wider range of the ADS131A02 suits harsher industrial conditions. |
| Integrated PGA / gain stages | Yes (programmable gain) | Yes (programmable gain) | On-chip programmable gain allows small sensor signals to be amplified before conversion, improving effective resolution without external front-end circuitry. |
| Typical application focus | Energy metering, power monitoring, industrial sensing | Biopotential (ECG/EEG/EMG), patient monitoring, multi-channel data acquisition | Application focus indicates the intended signal chain and noise/bandwidth trade-offs, helping judge functional substitutability for a given end use. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS131E08IPAGR | ADS131A02IPBS |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 16, 24 | 24 |
| Number of Channels | 8 | 2 |
| Power (Watts) | 17.6 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 ADS131E08IPAGR?
The ADS131A02IPBS is a 2-channel, simultaneous-sampling, 24-bit delta-sigma ADC with a maximum data rate of 128 kSPS, housed in a TQFP-32 package. The ADS131E08IPAGR is an 8-channel, simultaneous-sampling, 24-bit delta-sigma ADC with a maximum data rate of 64 kSPS, housed in a TQFP-64 package. The ADS131E08IPAGR integrates a programmable gain amplifier (PGA) per channel and is designed for biopotential and industrial measurement applications, while the ADS131A02IPBS targets energy metering and power quality analysis with its higher per-channel throughput.
Are the ADS131A02IPBS and ADS131E08IPAGR pin-to-pin or package compatible?
No. The ADS131A02IPBS uses a 32-pin TQFP package, while the ADS131E08IPAGR uses a 64-pin TQFP package. The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements for each other.
How do the input channel configurations differ between the two devices?
The ADS131A02IPBS provides 2 differential input channels. The ADS131E08IPAGR provides 8 differential input channels. Designs requiring more than 2 simultaneous channels must use the ADS131E08IPAGR or a comparable multi-channel device.
What are the maximum data rates of the ADS131A02IPBS and ADS131E08IPAGR?
The ADS131A02IPBS supports a maximum data rate of 128 kSPS per channel. The ADS131E08IPAGR supports a maximum data rate of 64 kSPS per channel. The higher throughput of the ADS131A02IPBS suits applications requiring faster sampling, while the ADS131E08IPAGR prioritizes channel count.
Do both devices include a programmable gain amplifier (PGA) on each channel?
The ADS131E08IPAGR integrates a programmable gain amplifier (PGA) on each input channel, supporting gains from 1 to 12. The ADS131A02IPBS does not include a per-channel PGA; its input range is fixed and scaled by the external input network and reference. Designs requiring variable gain per channel should select the ADS131E08IPAGR.
What are the typical target applications for each device?
The ADS131A02IPBS is typically used in energy metering, power quality monitoring, and power protection applications. The ADS131E08IPAGR is typically used in biopotential measurement (ECG, EEG, EMG), industrial process control, and multi-channel data acquisition systems. Application selection should be based on channel count, data rate, and PGA requirements.
Can the ADS131A02IPBS and ADS131E08IPAGR share the same SPI interface and reference design?
Both devices use an SPI-compatible serial interface and require an external voltage reference, but the command sets, register maps, and frame formats differ between the two families. Firmware and reference decoupling networks must be redesigned per the respective datasheets; the interface is not software-compatible without modification.