Part A
ADS131E04IPAG
Texas Instruments
- Lifecycle
- Active
- Stock
- 5221 PCS
- Package
- TQFP-64
- Series
- Acquisition de données - Analog Front End (AFE)
Replacement verdict
Compatible functional replacement candidate
The ADS131A04IPBSR and ADS131E04IPAG are both 4-channel, 24-bit delta-sigma ADC front-ends from the same ADS131 family, sharing a common TQFP-32 footprint and similar SPI interface architecture, making them strong functional replacement candidates. However, the ADS131A04IPBSR offers a wider analog supply range and higher data rate, while the ADS131E04IPAG provides an integrated PGA with a different gain structure. Designers should validate supply rail compatibility, PGA configuration, and timing requirements before final substitution.
Channel Count and Resolution
High match
Package Type
High match
Supply Voltage Range
Validation required
PGA and Gain Configuration
Validation required
Parts at a glance
Part B
ADS131A04IPBSR
Texas Instruments
- Lifecycle
- Active
- Stock
- 3693 PCS
- Package
- TQFP-32
- Series
- Acquisition de données - Analog Front End (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 | ADS131A04IPBSR | ADS131E04IPAG | Why it matters |
|---|---|---|---|
| Number of ADC channels | 4 | 4 | Both devices provide four simultaneous-sampling channels, so channel count alone does not differentiate them for multi-phase or multi-sensor acquisition. |
| Resolution | 24 bit | 24 bit | Identical 24-bit resolution means both can resolve very small signal changes, which is critical for precision energy metering and biopotential sensing. |
| Maximum sample rate per channel | 128 kSPS | 64 kSPS | The higher sample rate of the ADS131A04 supports wider-bandwidth signals and faster transient capture, while the ADS131E04 is limited to lower-frequency applications. |
| Interface type | SPI (with hardware/async modes) | SPI | Both use SPI, but the ADS131A04 offers additional framing/hardware modes that can simplify host synchronization in some designs. |
| Analog supply voltage | 3.0 V to 3.6 V (single 3.3 V typical) | 2.7 V to 5.25 V (analog) | The wider analog supply range of the ADS131E04 allows operation from 5 V rails, affecting input range and compatibility with legacy 5 V systems. |
| Digital supply voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | Matching digital supply ranges ensure both can interface directly to the same low-voltage logic without level shifting. |
| Internal PGA gain range | 1 to 16 (programmable) | 1 to 12 (programmable) | The ADS131A04's higher maximum gain enables detection of smaller input signals without external amplification, improving sensitivity for low-amplitude sensors. |
| Package | TQFP-32 | TQFP-64 | Different package footprints and pin counts mean the two parts are not drop-in PCB replacements and require separate layout designs. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +105 °C | The ADS131A04's extended upper temperature limit makes it preferable for harsh-environment or high-ambient industrial applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS131E04IPAG | ADS131A04IPBSR |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 16, 24 | 24 |
| Number of Channels | 4 | 4 |
| Power (Watts) | 10.2 mW | - |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 3V ~ 5.5V |
| Voltage - Supply, Digital | 1.8V ~ 3.6V | 1.65V ~ 3.6V |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key architectural differences between the ADS131A04IPBSR and the ADS131E04IPAG?
The ADS131A04IPBSR is a 4-channel, simultaneous-sampling, 24-bit delta-sigma ADC that supports both synchronous and asynchronous master/slave interface modes with a flexible SPI-compatible serial interface. The ADS131E04IPAG is a 4-channel, simultaneous-sampling, 24-bit delta-sigma ADC from the ADS131E04 family that uses a fixed SPI-compatible interface and is designed primarily for power-monitoring and industrial metering applications. The ADS131A04 offers additional interface flexibility and a different internal register map compared with the ADS131E04.
Are the ADS131A04IPBSR and ADS131E04IPAG pin-to-pin compatible?
No. The ADS131A04IPBSR is supplied in a 32-pin TQFP package (PBS), while the ADS131E04IPAG is supplied in a 64-pin TQFP package (PAG). The different package sizes and pin counts mean the two devices are not pin-to-pin compatible and require different PCB land patterns.
Do both devices provide the same number of ADC channels and resolution?
Yes. Both the ADS131A04IPBSR and the ADS131E04IPAG integrate four simultaneous-sampling, 24-bit delta-sigma ADC channels, making them suitable for multi-phase power measurement and multi-channel sensor acquisition. Channel count and nominal resolution are matched, but overall performance and feature sets differ as documented in their respective datasheets.
Can the ADS131A04IPBSR directly replace the ADS131E04IPAG in an existing design?
No, not without redesign. Because the two devices differ in package (32-pin TQFP versus 64-pin TQFP), register map, interface configuration options, and surrounding pin functions, a direct drop-in replacement is not possible. Any substitution requires schematic, layout, and firmware changes validated against the respective manufacturer datasheets.
What interface options does each device support?
The ADS131A04IPBSR supports SPI-compatible serial communication with selectable synchronous or asynchronous master/slave modes, allowing flexible system clocking arrangements. The ADS131E04IPAG provides an SPI-compatible serial interface for register access and data readout in its intended power-monitoring configurations. Designers should confirm the exact interface timing and mode requirements in each device's datasheet before selecting between them.
Which device is better suited for multi-phase power monitoring applications?
Both devices are applicable to multi-channel signal acquisition, but the ADS131E04IPAG family is specifically positioned for power-monitoring and metering applications with its 4-channel simultaneous-sampling architecture. The ADS131A04IPBSR offers greater interface flexibility and a smaller 32-pin package, which can be advantageous in space-constrained designs. Selection should be based on the specific system requirements and verified datasheet parameters.
Do the two devices share the same supply voltage requirements?
Both devices are designed for low-voltage operation with separate analog and digital supplies typical of precision delta-sigma ADCs, but the exact recommended supply ranges and absolute maximum ratings differ between the ADS131A04 and ADS131E04 families. Engineers must consult the respective manufacturer datasheets to confirm the analog supply, digital supply, and reference voltage requirements for each part.