Part A
ADS131E08IPAGR
德州儀器
- Lifecycle
- Active
- Stock
- 6530 件
- Package
- TQFP-64
- Series
- 資料獲取-類比前端（AFE）
Replacement verdict
Not a drop-in replacement
The ADS131A02IPBSR and ADS131E08IPAGR are not drop-in replacements for one another. The ADS131A02IPBSR 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, pinout, and input architecture make direct substitution impractical without a full hardware and firmware redesign.
Different channel count
Different package footprint
Different pinout
Different input architecture
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 | ADS131E08IPAGR | Why it matters |
|---|---|---|---|
| Number of ADC Channels | 2 | 8 | Channel count determines how many independent signals can be sampled simultaneously; a 2-channel part cannot replace an 8-channel part in multi-phase or multi-sensor systems. |
| Resolution (bits) | 24 | 24 | Both are 24-bit delta-sigma converters, so nominal resolution is equivalent and does not block substitutability on its own. |
| Maximum Sample Rate (kSPS) | 128 | 64 | Sample rate limits the bandwidth of signals that can be captured; the higher-rate device can handle faster-changing inputs that the slower one cannot. |
| Interface Type | SPI (serial) | SPI (serial) | Both use a serial SPI interface, so host-side digital connectivity is compatible and does not require a different bus architecture. |
| Supply Voltage (analog, V) | 3.0 to 3.6 (single 3.3 V) | 2.7 to 5.25 (analog), 1.8 to 3.6 (digital) | Supply range affects power-rail design; the wider-range device can operate from 5 V analog rails while the other is limited to a 3.3 V rail. |
| Package | 32-pin TQFP (PBS) | 64-pin TQFP (PAG) | Different package footprints and pin counts mean the two parts are not drop-in compatible on the same PCB layout. |
| Operating Temperature Range (°C) | -40 to +125 | -40 to +105 | The wider temperature range of the first part allows operation in harsher environments where the second part may exceed its rated limits. |
| Integrated PGA / Gain Stages | Yes (programmable gain) | Yes (programmable gain) | Both include programmable gain amplification, so small-signal conditioning capability is comparable and does not block substitution. |
| Typical Application Focus | Power metering, energy monitoring, 2-channel precision sensing | ECG/EEG biopotential, multi-channel industrial and medical data acquisition | Target application and channel architecture differ, so functional substitutability depends on whether the system needs 2 or 8 simultaneous channels. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS131E08IPAGR | ADS131A02IPBSR |
|---|---|---|
| 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 ADS131A02IPBSR and the ADS131E08IPAGR?
The ADS131A02IPBSR 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 ADS131A02 targets lower-channel-count, higher-speed applications, while the ADS131E08 targets higher-channel-count applications such as multiphase energy metering and power monitoring.
Are the ADS131A02IPBSR and ADS131E08IPAGR pin-to-pin or package compatible?
No. The ADS131A02IPBSR uses a 32-pin TQFP (PBS) package, while the ADS131E08IPAGR uses a 64-pin TQFP (PAG) package. The different pin counts and land patterns prevent direct PCB drop-in replacement; a redesign of the footprint and surrounding circuitry is required.
How do the input channel counts and data rates compare between these two ADCs?
The ADS131A02IPBSR provides 2 simultaneous-sampling input channels at up to 128 kSPS per channel. The ADS131E08IPAGR provides 8 simultaneous-sampling input channels at up to 64 kSPS per channel. The ADS131E08 offers four times the channel count but half the maximum per-channel data rate of the ADS131A02.
Do both devices support the same serial interface for communication with a host controller?
Both devices use an SPI-compatible serial interface for register access and data readout. However, the exact register maps, command sets, and frame formats differ between the ADS131A02 and ADS131E08 families, so firmware and driver code must be adapted to the specific device datasheet rather than reused unchanged.
What are the typical application targets for the ADS131A02IPBSR versus the ADS131E08IPAGR?
The ADS131A02IPBSR is typically used in applications requiring a small number of high-resolution, high-speed channels, such as power quality analyzers, protection relays, and single- or two-phase energy monitoring. The ADS131E08IPAGR is typically used in multiphase energy meters, power monitoring equipment, and industrial data acquisition systems that require eight simultaneous high-resolution channels.
Can the ADS131A02IPBSR and ADS131E08IPAGR operate from the same supply voltages?
Both devices are designed for analog supply and digital supply rails typical of the ADS131 family, but the exact recommended supply ranges, reference options, and internal PGA configurations must be verified against each device's respective datasheet. Designers should not assume identical supply or reference requirements without confirming the published electrical characteristics for each part number.
Which device should be selected when more simultaneous channels are needed at a lower per-channel throughput?
The ADS131E08IPAGR is the appropriate choice when eight simultaneous channels are required and per-channel data rates up to 64 kSPS are sufficient, as in multiphase metering. The ADS131A02IPBSR is preferable when only one or two channels are needed but higher per-channel throughput up to 128 kSPS is required.