Part A
ADS131M08IPBSR
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 3300 PCS
- Package
- TQFP-32
- Series
- 데이터 수집 - 아날로그 변환기(ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS131M08IPBSR is a viable functional replacement candidate for the ADS131E04IPAG in new designs, offering a higher channel count and wider supply range, but it is not a drop-in substitute due to differences in package footprint, channel count, and output data rate. Engineers must validate the SPI timing, reference configuration, and layout changes before adopting the ADS131M08IPBSR as a replacement.
Channel Count
Validation required
Package Type
Not compatible
Output Data Rate
Validation required
Supply Voltage Range
High match
Parts at a glance
Part B
ADS131E04IPAG
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 5221 PCS
- Package
- TQFP-64
- Series
- 데이터 수집 - 아날로그 프런트엔드(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 | ADS131E04IPAG | ADS131M08IPBSR | Why it matters |
|---|---|---|---|
| Number of input channels | 4 differential | 8 differential | Channel count determines how many analog signals can be measured simultaneously; a direct functional substitutability constraint. |
| Resolution | 24 bit | 24 bit | Both are 24-bit delta-sigma ADCs, so dynamic range and precision class are equivalent. |
| Maximum sample rate (per channel) | 64 kSPS | 32 kSPS | Sample rate limits the bandwidth of signals that can be captured; the E04 supports higher per-channel throughput. |
| Data interface | SPI (mode 1) | SPI (mode 1) | Both use a standard SPI serial interface, simplifying host-side firmware reuse. |
| Analog supply voltage | 2.7 V to 5.25 V (AVDD) | 2.7 V to 3.6 V (AVDD) | Supply range affects compatibility with the system power rail; the E04 tolerates a wider analog supply. |
| Digital supply voltage | 1.8 V to 3.6 V (DVDD) | 1.8 V to 3.6 V (DVDD) | Digital I/O levels must match the host logic; both support 1.8 V to 3.6 V logic. |
| Package | TQFP-64 (PAG) | TQFP-32 (PBS) | Package footprint and pin count differ, so a PCB redesign is required for substitution. |
| Internal PGA gain range | 1 to 12 | 1 to 128 | PGA gain range determines the smallest signal that can be resolved; the M08 supports much higher gain for low-level sensors. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +125 °C | Temperature range affects suitability for industrial and harsh-environment applications. |
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 | ADS131M08IPBSR | ADS131E04IPAG |
|---|---|---|
| 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 | - | 4 |
| Power (Watts) | - | 10.2 mW |
| Mounting Type | - | Surface Mount |
Frequently asked questions
What are the key architectural differences between the ADS131E04IPAG and the ADS131M08IPBSR?
The ADS131E04IPAG is a 4-channel, simultaneous-sampling, 24-bit delta-sigma ADC with a maximum data rate of 64 kSPS per channel, housed in a TQFP-64 package. The ADS131M08IPBSR is an 8-channel, simultaneous-sampling, 24-bit delta-sigma ADC with a maximum data rate of 32 kSPS per channel, housed in a TQFP-32 package. The ADS131M08IPBSR also integrates a programmable gain amplifier (PGA) with gains from 1 to 128 on each channel, while the ADS131E04IPAG provides a fixed gain of 1 with an internal input buffer.
Are the ADS131E04IPAG and ADS131M08IPBSR pin-to-pin or package compatible?
No. The ADS131E04IPAG uses a 64-pin TQFP package, while the ADS131M08IPBSR uses a 32-pin TQFP package. The pin counts, pin functions, and PCB land patterns differ, so these devices are not drop-in replacements for one another.
How do the input channel counts and data rates compare between the two devices?
The ADS131E04IPAG provides 4 differential input channels with a maximum output data rate of 64 kSPS per channel. The ADS131M08IPBSR provides 8 differential input channels with a maximum output data rate of 32 kSPS per channel. The ADS131E04IPAG therefore offers higher per-channel throughput, while the ADS131M08IPBSR offers twice the channel count.
Do both devices support internal PGA and what gain ranges are available?
The ADS131M08IPBSR includes an integrated programmable gain amplifier with selectable gains of 1, 2, 4, 8, 16, 32, 64, and 128 on each channel. The ADS131E04IPAG does not provide a programmable gain amplifier; it uses a fixed gain of 1 with an internal input buffer. Designs requiring variable gain should account for this difference.
What are the supply voltage and reference requirements for each device?
Both devices operate from an analog supply (AVDD) of 3.0 V to 5.5 V and a digital supply (DVDD) of 1.8 V to 3.6 V. The ADS131E04IPAG supports an external reference or an internal reference of 2.4 V, while the ADS131M08IPBSR supports an external reference or an internal reference of 1.2 V. The reference selection affects the full-scale input range and must be matched to the system's signal chain.
Which device is better suited for high-channel-count, low-power monitoring applications?
The ADS131M08IPBSR is generally better suited for high-channel-count applications because it integrates 8 channels in a smaller 32-pin TQFP package and includes per-channel PGA, reducing external component count. The ADS131E04IPAG is better suited for applications requiring higher per-channel data rates up to 64 kSPS with 4 channels. Selection should be based on channel count, data rate, gain requirements, and package size.
What communication interface do the ADS131E04IPAG and ADS131M08IPBSR use?
Both devices use an SPI-compatible serial interface for configuration and data readout. The ADS131E04IPAG supports SPI with a maximum SCLK frequency of 20 MHz, while the ADS131M08IPBSR supports SPI with a maximum SCLK frequency of 25 MHz. The interface timing and register maps differ between the two devices, so firmware must be adapted accordingly.
Can the ADS131M08IPBSR replace the ADS131E04IPAG in an existing design without hardware changes?
No. The two devices differ in package (64-pin TQFP vs 32-pin TQFP), channel count (4 vs 8), maximum data rate (64 kSPS vs 32 kSPS), PGA availability, internal reference voltage (2.4 V vs 1.2 V), and register map. A replacement requires PCB redesign, firmware modification, and revalidation against the manufacturer datasheets.