Part A
ADS1282IPW
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 4636 PCS
- Package
- TSSOP-28
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1282IPW and ADS1271IPWG4 are both 24-bit delta-sigma ADCs in a TSSOP-28 package, but they differ fundamentally in resolution architecture, input configuration, and target application. The ADS1282IPW is a single-channel, high-resolution seismic-grade ADC with an integrated programmable gain amplifier and low-noise architecture optimized for geophysical and energy exploration, while the ADS1271IPWG4 is a single-channel, wide-bandwidth industrial ADC optimized for AC and DC measurement with a fixed gain front end. Their differing input structures, data rate profiles, and functional feature sets mean they are not interchangeable in existing designs without significant circuit and firmware redesign.
Different input architecture
Different data rate profile
Different feature set
Different application focus
Parts at a glance
Part B
ADS1271IPWG4
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 3928 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS1282IPW | ADS1271IPWG4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 31 | 24 | Higher resolution enables finer signal detail and lower quantization noise, which is critical for precision measurement applications. |
| Architecture | Delta-Sigma (with PGA) | Delta-Sigma | An integrated PGA allows direct connection of low-level sensors without external amplification, simplifying the signal chain. |
| Maximum Sample Rate | 4 kSPS | 105 kSPS | Sample rate determines the bandwidth of signals that can be captured; higher rates suit faster-changing or wider-bandwidth inputs. |
| Number of Input Channels | 2 (differential) | 1 (differential) | Channel count affects how many signals can be measured simultaneously or multiplexed without external switching hardware. |
| Input Type | Differential | Differential | Differential inputs reject common-mode noise, improving accuracy in electrically noisy environments. |
| Supply Voltage (Analog) | 5 V (analog), 1.8 V to 3.3 V (digital) | 5 V (analog), 1.8 V to 3.3 V (digital) | Supply requirements determine compatibility with the surrounding power architecture and level-shifting needs. |
| Interface | SPI | SPI | A common SPI interface allows straightforward connection to most microcontrollers and DSPs. |
| Package | TSSOP-28 | TSSOP-16 | Package footprint and pin count affect PCB layout, board space, and drop-in compatibility. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +105°C | The temperature range determines suitability for harsh or industrial environments and thermal margin. |
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 | ADS1282IPW | ADS1271IPWG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 31 | 24 |
| Sampling Rate(Per Second) | 4k | 105k |
| Number of Inputs | 1 | 1 |
| Input Type | Differential | Differential |
| Data Interface | SPI | SPI |
| Configuration | ADC | ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 1.65V ~ 3.6V | 1.65V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 105°C |
| Features | PGA | - |
Frequently asked questions
What are the primary differences between the ADS1282IPW and the ADS1271IPWG4?
The ADS1282IPW is a 31-bit, single-channel delta-sigma ADC with an integrated PGA and is designed for seismic and high-resolution measurement applications, featuring a maximum data rate of 4 kSPS. The ADS1271IPWG4 is a 24-bit, single-channel delta-sigma ADC offering data rates up to 105 kSPS with three selectable filter modes (High-Speed, High-Resolution, Low-Power). The ADS1282 integrates a PGA and supports a wider analog supply range, while the ADS1271 provides higher throughput for industrial measurement applications.
Are the ADS1282IPW and ADS1271IPWG4 pin-compatible?
No. Both devices are offered in a 24-pin TSSOP (PW) package, but their pin functions and internal architectures differ. The ADS1282IPW includes PGA input pins and additional control signals not present on the ADS1271IPWG4. A direct drop-in replacement is not possible without PCB redesign and validation against the respective datasheets.
What are the maximum data rates of the ADS1282IPW and ADS1271IPWG4?
The ADS1282IPW supports a maximum data rate of 4 kSPS. The ADS1271IPWG4 supports up to 105 kSPS in High-Speed mode, 52 kSPS in High-Resolution mode, and 10.5 kSPS in Low-Power mode.
How do the resolution and noise performance of these two ADCs compare?
The ADS1282IPW provides 31-bit resolution with very low noise, making it suitable for high-resolution seismic and precision measurement applications. The ADS1271IPWG4 provides 24-bit resolution with excellent noise performance optimized for industrial measurement across its three filter modes. The ADS1282 targets higher effective resolution at lower speeds, while the ADS1271 balances resolution and throughput.
Do both devices support the same digital interface?
Both devices provide a serial digital interface for data output, but the specific protocol details differ. The ADS1282IPW uses a SPI-compatible serial interface with additional synchronization and control features. The ADS1271IPWG4 uses a SPI-compatible interface with dedicated DOUT, SCLK, and DRDY/FSYNC pins. Firmware and host interface logic must be adapted accordingly.
What are the typical applications for each device?
The ADS1282IPW is typically used in seismic data acquisition, energy exploration, and precision industrial measurement requiring high resolution and integrated PGA. The ADS1271IPWG4 is used in industrial process control, vibration analysis, medical instrumentation, and test equipment where higher sample rates and 24-bit resolution are required.
Can the ADS1271IPWG4 replace the ADS1282IPW in an existing design?
Not directly. The devices differ in resolution, data rate, pin functions, and integrated features such as the PGA in the ADS1282IPW. Replacement requires review of the analog front end, digital interface, power supply requirements, and firmware, with validation against both datasheets before substitution.