Part A
ADS1271IBPW
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 2069 個数
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS1282IPW and ADS1271IBPW share a compatible TSSOP-28 footprint and a similar SPI-compatible serial interface, but they differ in resolution, architecture, and sample rate, so the ADS1271IBPW can serve as a functional substitute only after validating resolution, data rate, and filter requirements for the target application.
Package Type
High match
Digital Interface
High match
Resolution
Validation required
Sample Rate
Not compatible
Parts at a glance
Part B
ADS1282IPW
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 4636 個数
- Package
- TSSOP-28
- Series
- データ取得 - アナログ/デジタルコンバータ (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 | ADS1271IBPW | Why it matters |
|---|---|---|---|
| Resolution (bits) | 31 | 24 | Higher resolution provides finer measurement granularity; the 31-bit ADS1282 offers significantly more dynamic range than the 24-bit ADS1271. |
| Architecture | Delta-Sigma (2nd order) | Delta-Sigma | Both are delta-sigma converters, but the ADS1282 uses a specific 2nd-order modulator optimized for seismic and high-resolution sensor applications. |
| Max Sample Rate (SPS) | 4000 | 105000 | The ADS1271 supports much higher throughput, making it suitable for wider-bandwidth signals, while the ADS1282 trades speed for resolution. |
| Number of Input Channels | 2 (differential) | 1 (differential) | The ADS1282 provides two differential inputs (with mux/PGA), enabling multi-sensor configurations; the ADS1271 has a single differential input. |
| PGA / Gain Stage | Yes (integrated PGA) | No | An integrated PGA allows direct connection of low-level sensors without external amplification, simplifying the signal chain. |
| Supply Voltage (Analog) | 5 V (analog), 3.3 V (digital) | 5 V (analog), 1.8 V–3.3 V (digital) | Digital supply flexibility affects interfacing with host logic; the ADS1271 supports a wider digital I/O range. |
| Interface Type | SPI (serial) | SPI (serial) | Both use SPI, but register maps and command sets differ, so firmware must be adapted when substituting. |
| Package | TSSOP-28 | TSSOP-24 | Different pin counts and footprints mean the parts are not drop-in replacements; PCB layout changes are required. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +105°C | The ADS1271 supports a wider temperature range, which matters for industrial and harsh-environment applications. |
| Typical Application Focus | Seismic / energy exploration, high-resolution sensor measurement | Industrial measurement, vibration, data acquisition | Application focus indicates the intended signal bandwidth and noise performance, guiding functional substitutability. |
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 | ADS1271IBPW | ADS1282IPW |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | ADS1271 | - |
| Number of Bits | 24 | 31 |
| Sampling Rate (Per Second) | 105k | - |
| Number of Inputs | 1 | 1 |
| Input Type | Differential | Differential |
| Data Interface | SPI | SPI |
| Configuration | ADC | ADC |
| Number of A / D Converters | 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 ~ 105°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
| Sampling Rate(Per Second) | - | 4k |
| Number of A/D Converters | - | 1 |
| Features | - | PGA |
Frequently asked questions
What are the primary differences between the ADS1282IPW and ADS1271IBPW?
The ADS1282IPW is a 31-bit delta-sigma ADC with an integrated PGA and is designed for seismic and high-resolution sensor measurement, featuring a maximum data rate of 4 kSPS. The ADS1271IBPW is a 24-bit delta-sigma ADC offering data rates up to 105 kSPS with a fixed gain of 1 and no integrated PGA. The ADS1282 targets ultra-high-resolution low-frequency applications, while the ADS1271 targets higher-speed precision industrial measurement.
Do the ADS1282IPW and ADS1271IBPW share the same package and pinout?
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 ADS1271IBPW, so the two are not pin-for-pin compatible and cannot be dropped into the same PCB land pattern without design changes.
What are the maximum output data rates of each device?
The ADS1282IPW supports data rates up to 4 kSPS in its high-resolution modes. The ADS1271IBPW supports data rates up to 105 kSPS in high-speed mode, with lower rates available in high-resolution and low-power modes.
Which device offers higher resolution, and what is the trade-off?
The ADS1282IPW provides up to 31-bit resolution with an integrated PGA, making it suitable for very low-frequency, high-dynamic-range measurements such as seismology. The ADS1271IBPW provides 24-bit resolution at significantly higher throughput. The trade-off is resolution and input flexibility versus sampling speed.
Do both ADCs support the same digital interface?
Both devices provide a serial digital interface for output data, but the ADS1282IPW includes additional configuration and control features related to its PGA and calibration modes. The interface timing, register set, and control word formats differ between the two devices, so firmware and host interface logic must be adapted accordingly.
What are the typical supply voltage requirements for these ADCs?
Both the ADS1282IPW and ADS1271IBPW operate from an analog supply of 5 V and a digital supply of 1.8 V to 3.3 V, consistent with their respective datasheets. Designers should confirm exact supply ranges and decoupling requirements against the official manufacturer datasheets for each device.
Can the ADS1271IBPW be used as a direct replacement for the ADS1282IPW in an existing design?
No. Although both are 24-pin TSSOP delta-sigma ADCs, they differ in resolution, data rate, integrated PGA, pin functions, and register architecture. A direct replacement is not possible without redesigning the analog front end, PCB layout, and firmware to accommodate the ADS1271IBPW's different capabilities and interface.