Part A
ADS131M08IPBS
德州儀器
- Lifecycle
- Active
- Stock
- 6440 件
- Package
- TQFP-32
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS131M08IPBS is a strong functional replacement candidate for the ADS131E08IPAGR, sharing the same eight-channel simultaneous-sampling delta-sigma architecture, identical TQFP-64 footprint, and comparable SPI interface and supply framework. Designers should validate the revised digital filter and data-rate configuration, confirm the updated register map and timing, and verify the specified noise and accuracy performance against the target application before final qualification.
Channel Count and Architecture
High match
Package and Pin Footprint
High match
Digital Interface and Register Map
Validation required
Noise and Accuracy Performance
Validation required
Parts at a glance
Part B
ADS131E08IPAGR
德州儀器
- Lifecycle
- Active
- Stock
- 6530 件
- Package
- TQFP-64
- 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 | ADS131E08IPAGR | ADS131M08IPBS | Why it matters |
|---|---|---|---|
| Number of input channels | 8 | 8 | Both are 8-channel devices, so channel count is functionally equivalent for multi-phase or multi-sensor acquisition. |
| Resolution | 24 bit | 24 bit | Identical 24-bit resolution means comparable dynamic range and precision for precision measurement applications. |
| Maximum sample rate (per channel) | 64 kSPS | 32 kSPS | The ADS131E08 supports higher per-channel throughput, which matters for higher-bandwidth signals such as power monitoring with fast transients. |
| Supply voltage (analog) | 2.7 V to 5.25 V (single supply) | 2.7 V to 3.6 V (single supply) | The wider analog supply range of the ADS131E08 allows 5 V operation, which can simplify interface to higher-voltage sensors and front-ends. |
| Interface | SPI (serial) | SPI (serial) | Both use SPI, so the host microcontroller interface is compatible and firmware porting effort is reduced. |
| Package | TQFP-64 (PAG) | TQFP-32 (PBS) | Different package footprints and pin counts mean the PCB layout must be redesigned; they are not drop-in replacements. |
| Internal reference | Yes (internal reference) | Yes (internal reference) | Both integrate a reference, reducing external component count and simplifying precision measurement design. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +125 °C | The ADS131M08 supports a higher maximum temperature, which matters for industrial and automotive environments. |
| PGA / gain stages | Yes (integrated PGA) | Yes (integrated PGA) | Both include programmable gain, allowing direct connection of low-amplitude sensors without external amplification. |
| Data rate / filter options | Multiple digital filter modes (sinc-based) | Multiple digital filter modes (sinc-based) | Both offer configurable digital filtering, enabling trade-offs between noise and settling time for different measurement needs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS131M08IPBS | ADS131E08IPAGR |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 16, 24 |
| Sampling Rate(Per Second) | 32k | - |
| Number of Inputs | 8 | - |
| Input Type | Differential | - |
| Data Interface | SPI | - |
| Configuration | ADC | - |
| Ratio - S / H: ADC | 0:1 | - |
| Number of A/D Converters | 8 | - |
| Architecture | Sigma-Delta | - |
| Reference Type | Internal | - |
| Voltage - Supply, Analog | 2.7V ~ 3.6V | 2.7V ~ 5.25V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V | 1.8V ~ 3.6V |
| Features | PGA, Simultaneous Sampling | - |
| Operating Temperature | -40°C ~ 125°C | - |
| Number of Channels | - | 8 |
| Power (Watts) | - | 17.6 mW |
| Mounting Type | - | Surface Mount |
Frequently asked questions
What are the key architectural differences between the ADS131E08IPAGR and the ADS131M08IPBS?
The ADS131E08IPAGR is an 8-channel, simultaneous-sampling, 24-bit delta-sigma ADC from the ADS131E08 family, while the ADS131M08IPBS is an 8-channel, simultaneous-sampling, 24-bit delta-sigma ADC from the ADS131M08 family. Both integrate a programmable gain amplifier, internal reference, and SPI-compatible interface, but they differ in data rate, gain options, and power consumption characteristics as specified in their respective Texas Instruments datasheets.
Are the ADS131E08IPAGR and ADS131M08IPBS pin-to-pin compatible?
No. The ADS131E08IPAGR is supplied in a TQFP-64 package, while the ADS131M08IPBS is supplied in a TQFP-32 package. The different package sizes and pin counts mean the two devices are not pin-to-pin compatible and require different PCB footprints.
Can the ADS131M08IPBS be used as a direct drop-in replacement for the ADS131E08IPAGR?
No. Because the two devices use different packages (TQFP-32 vs TQFP-64), have different pinouts, and belong to different product families with differing register maps and performance specifications, a direct drop-in replacement is not possible. Any substitution requires a full design review against the respective datasheets.
What are the maximum data rates of the ADS131E08IPAGR and ADS131M08IPBS?
Per the Texas Instruments datasheets, the ADS131E08IPAGR supports data rates up to 64 kSPS per channel, while the ADS131M08IPBS supports data rates up to 32 kSPS per channel. Designers should confirm the exact rate configuration against the latest datasheet revision for their target operating mode.
Do both devices support simultaneous sampling across all eight channels?
Yes. Both the ADS131E08IPAGR and the ADS131M08IPBS are 8-channel, simultaneous-sampling delta-sigma ADCs, making them suitable for multi-phase power monitoring and metering applications where channel-to-channel phase alignment is critical.
What supply voltages do the ADS131E08IPAGR and ADS131M08IPBS require?
Both devices operate from an analog supply (AVDD) and a digital supply (DVDD). The ADS131E08IPAGR supports an analog supply range of 3.0 V to 5.5 V and a digital supply of 1.8 V to 3.6 V. The ADS131M08IPBS supports an analog supply of 2.7 V to 3.6 V and a digital supply of 1.8 V to 3.6 V. Refer to the respective datasheets for exact limits and conditions.
Which device is better suited for low-power metering designs?
The ADS131M08IPBS is generally positioned for lower-power operation compared with the ADS131E08IPAGR, based on the published power consumption figures in their Texas Instruments datasheets. The exact trade-off depends on data rate, gain setting, and supply voltage, so both should be evaluated against the target power budget.
Do both parts include an internal voltage reference and PGA?
Yes. Both the ADS131E08IPAGR and the ADS131M08IPBS integrate a programmable gain amplifier and an internal voltage reference, reducing external component count. The available gain settings and reference specifications differ between the two families and should be verified in the respective datasheets.