Part A
ADS1282IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 3098 PCS
- Package
- TSSOP-28
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS1282IPWR is a functionally compatible replacement candidate for the ADS1281IPW, sharing the same 24-bit delta-sigma ADC core, single-channel architecture, TSSOP-28 footprint, and industrial temperature range. Designers should validate the integrated PGA and extended feature set of the ADS1282IPWR against their specific signal-chain requirements before final qualification.
Resolution and Architecture
High match
Package and Pinout
High match
Input Configuration
Validation required
Operating Temperature Range
High match
Parts at a glance
Part B
ADS1281IPW
Texas Instruments
- Lifecycle
- Active
- Stock
- 4383 PCS
- Package
- TSSOP-24
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (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 | ADS1281IPW | ADS1282IPWR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 31 | 31 | Both are 31-bit delta-sigma ADCs, so resolution is equivalent for high-precision seismic and energy exploration applications. |
| Number of Input Channels | 1 (single-ended) | 2 (differential, with input MUX) | The ADS1282 includes an input multiplexer supporting two differential channels, enabling channel switching without external circuitry, while the ADS1281 is single-channel. |
| PGA / Gain Stage | No integrated PGA | Integrated PGA (gains 1 to 64) | The ADS1282's programmable gain amplifier allows direct connection of low-level sensors, whereas the ADS1281 requires external amplification for small signals. |
| Data Output Rate (SPS) | Up to 4000 SPS | Up to 4000 SPS | Identical maximum output data rate supports the same seismic bandwidth requirements in both parts. |
| Supply Voltage (Analog) | 5 V (analog), 3.3 V (digital) | 5 V (analog), 3.3 V (digital) | Matching supply rails allow drop-in compatibility in existing board designs without power architecture changes. |
| Interface | SPI-compatible serial | SPI-compatible serial | Both use the same serial interface, simplifying firmware and host processor integration when substituting parts. |
| Package | TSSOP-24 (PW) | TSSOP-28 (PW), tape and reel | Different pin counts and footprints mean the parts are not drop-in replacements; PCB layout must accommodate the 28-pin ADS1282 versus the 24-pin ADS1281. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical industrial temperature range ensures both parts suit the same harsh-environment applications. |
| Power Consumption | Approx. 12 mW (typical) | Approx. 18 mW (typical, with PGA) | The ADS1282 draws more power due to its integrated PGA and MUX, which matters for battery-powered or low-power seismic nodes. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1282IPWR | ADS1281IPW |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 31 | 31 |
| Sampling Rate(Per Second) | 4k | 4k |
| Number of Inputs | 1 | 1 |
| Input Type | Differential | Differential, Single Ended |
| 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 ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the ADS1281IPW and ADS1282IPWR?
The ADS1281IPW is a single-channel, 31-bit delta-sigma ADC in a 24-pin TSSOP package, while the ADS1282IPWR is a dual-channel, 31-bit delta-sigma ADC in a 28-pin TSSOP package supplied in tape-and-reel form. The ADS1282 integrates a multiplexer and two independent channels, whereas the ADS1281 provides a single differential input channel. Both share the same core delta-sigma modulator architecture and are designed for high-resolution seismic and energy exploration applications.
Are the ADS1281IPW and ADS1282IPWR pin-compatible?
No. The ADS1281IPW uses a 24-pin TSSOP package, and the ADS1282IPWR uses a 28-pin TSSOP package. The differing pin counts and pin functions mean they are not drop-in replacements and require different PCB land patterns.
Do both devices support the same SPI interface and register map?
Both devices use a SPI-compatible serial interface for configuration and data readout, and both provide similar register-based control of gain, filter settings, and power modes. However, because the ADS1282 includes a second channel and input multiplexer, its register set and channel-selection controls differ from the single-channel ADS1281. Firmware must be validated against each device's specific datasheet register map.
What is the resolution and data rate capability of these ADCs?
Both the ADS1281 and ADS1282 are 31-bit delta-sigma ADCs. They support programmable output data rates suitable for high-resolution seismic and precision measurement applications, with digital filter options selectable through register configuration. Designers should confirm the exact data rate and filter settings against the respective manufacturer datasheet for the target operating mode.
Can the ADS1282IPWR replace the ADS1281IPW in an existing single-channel design?
Not as a direct drop-in replacement. The ADS1282IPWR has a different package footprint (28-pin versus 24-pin TSSOP), additional channel and multiplexer functionality, and a different register map. A redesign of the PCB layout and firmware validation would be required before substitution.
What are the typical applications for the ADS1281IPW and ADS1282IPWR?
Both devices are intended for high-resolution precision measurement, including seismic data acquisition, energy exploration instrumentation, and high-accuracy industrial sensing. The ADS1282's dual-channel architecture suits multi-sensor or multi-axis acquisition, while the ADS1281 suits single-channel high-resolution measurement.
What package and ordering options distinguish the two part numbers?
The ADS1281IPW is supplied in a 24-pin TSSOP tube/rail format, while the ADS1282IPWR is supplied in a 28-pin TSSOP tape-and-reel format (indicated by the R suffix). The differing package size and pin count affect PCB layout and assembly handling.