Part A
ADS1271IBPWR
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 6728 個数
- Package
- TSSOP-16
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1271IBPWR and ADS1282IPWG4 are both 24-bit delta-sigma ADCs, but they differ fundamentally in resolution architecture, package footprint, and functional feature set, so the ADS1282IPWG4 cannot serve as a direct drop-in substitute for the ADS1271IBPWR without board-level redesign and firmware revalidation.
Different package footprint
Different data rate range
Different supply architecture
Different integrated features
Parts at a glance
Part B
ADS1282IPWG4
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 2429 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 | ADS1271IBPWR | ADS1282IPWG4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 31 | Higher resolution enables finer signal detail and lower quantization noise, which is critical for precision measurement and seismic/energy-exploration applications. |
| Max Sample Rate (SPS) | 105k | 4k | Sample rate determines the bandwidth of signals the ADC can capture; the ADS1271 suits wideband industrial measurement while the ADS1282 targets low-frequency high-resolution sensing. |
| Input Type | Differential | Differential | Differential inputs reject common-mode noise and improve dynamic range, which is essential for accurate low-level signal acquisition. |
| Architecture | Delta-Sigma | Delta-Sigma | Delta-sigma architecture provides high resolution through oversampling and noise shaping, making both parts suitable for precision sensing. |
| Supply Voltage (Analog) | 5 V | 5 V | Analog supply voltage affects input range and noise performance; matching supplies simplifies board-level substitution. |
| Interface | SPI | SPI | A compatible serial interface allows reuse of the same digital host and firmware, reducing redesign effort when substituting parts. |
| Package | TSSOP-16 | TSSOP-28 | Package footprint and pin count must match the PCB layout; differing packages require layout changes and are not drop-in compatible. |
| Operating Temperature Range | -40 to +105 °C | -40 to +85 °C | The temperature range determines suitability for harsh environments; the wider range of the ADS1271 may be required in industrial or outdoor deployments. |
| PGA / Gain Stage | No | Yes | An integrated PGA allows direct connection of low-level sensors without external amplification, simplifying the signal chain for the ADS1282. |
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 | ADS1271IBPWR | ADS1282IPWG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 24 | 31 |
| Sampling Rate(Per Second) | 105k | 4k |
| 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 |
| Features | - | PGA |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 85°C |
Frequently asked questions
What are the primary differences between the ADS1271IBPWR and ADS1282IPWG4?
The ADS1271IBPWR is a 24-bit, 105 kSPS delta-sigma ADC with a single channel, while the ADS1282IPWG4 is a 31-bit, 4 kSPS delta-sigma ADC with two channels and an integrated PGA. The ADS1282IPWG4 targets high-resolution seismic and energy exploration applications, whereas the ADS1271IBPWR targets industrial measurement and vibration analysis.
Do the ADS1271IBPWR and ADS1282IPWG4 have compatible package footprints?
No. The ADS1271IBPWR is supplied in a TSSOP-16 package, and the ADS1282IPWG4 is supplied in a TSSOP-28 package. The different pin counts and land patterns prevent a direct drop-in replacement without PCB redesign.
What are the maximum sample rates of the ADS1271IBPWR and ADS1282IPWG4?
The ADS1271IBPWR supports data rates up to 105 kSPS in high-speed mode. The ADS1282IPWG4 supports data rates up to 4 kSPS. The ADS1271IBPWR is therefore better suited for higher-bandwidth signal acquisition.
How do the resolution specifications of the ADS1271IBPWR and ADS1282IPWG4 compare?
The ADS1271IBPWR is a 24-bit delta-sigma ADC. The ADS1282IPWG4 provides 31-bit resolution. The higher resolution of the ADS1282IPWG4 supports precision applications requiring very low noise and wide dynamic range.
Do both devices include an integrated programmable gain amplifier (PGA)?
No. The ADS1282IPWG4 includes an integrated PGA, while the ADS1271IBPWR does not include an on-chip PGA. Designs using the ADS1271IBPWR requiring gain must provide external signal conditioning.
What are the supply voltage requirements for the ADS1271IBPWR and ADS1282IPWG4?
The ADS1271IBPWR operates from a 5 V analog supply and a 1.8 V to 3.3 V digital supply. The ADS1282IPWG4 operates from a 5 V analog supply and a 1.8 V to 3.3 V digital supply. Both devices require careful supply decoupling and layout to achieve specified performance.
Are the ADS1271IBPWR and ADS1282IPWG4 pin-to-pin or functionally interchangeable?
No. They differ in package pin count, channel count, resolution, sample rate, and integrated features such as the PGA. They are not pin-to-pin compatible and cannot be treated as direct substitutes without full design validation against the respective datasheets.