Part A
ADS1282IPW
Texas Instruments
- Lifecycle
- Active
- Stock
- 4636 PCS
- Package
- TSSOP-28
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1282IPW and ADS1232IPWRG4 are not drop-in replacements for one another. Although both are 24-bit delta-sigma ADCs, they differ fundamentally in resolution architecture, input configuration, package footprint, and target application class, so substituting one for the other requires full electrical and mechanical redesign validation.
Different input architecture
Different package footprint
Different data rate range
Different supply requirements
Parts at a glance
Part B
ADS1232IPWRG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 4376 PCS
- Package
- TSSOP-24
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | ADS1232IPWRG4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 31 | 24 | Higher resolution enables finer measurement of small signal changes, which is critical for precision sensor and seismic applications. |
| Architecture | Delta-Sigma (2nd order) | Delta-Sigma | The modulator architecture affects noise shaping, linearity, and achievable effective resolution for the target signal bandwidth. |
| Number of Input Channels | 2 (differential) | 2 (differential) | Channel count determines how many independent differential signals can be digitized without external multiplexing. |
| Maximum Data Rate (SPS) | 4000 | 80 | The output data rate bounds the signal bandwidth and settling time achievable in the application. |
| PGA / Gain Stages | 1, 2, 4, 8, 16, 32, 64 | 1, 2, 64, 128 | Available gain settings determine the smallest input signal that can be amplified to full scale, affecting low-level measurement capability. |
| Supply Voltage (analog) | 5 V (analog), 3.3 V (digital) | 2.7 V to 5.3 V | Supply requirements affect power rail design and compatibility with the host system's available voltages. |
| Interface | SPI (serial) | SPI (serial) | The digital interface must match the host controller's supported protocol for direct connection. |
| Package | TSSOP-28 | TSSOP-24 | Package footprint and pin count affect PCB layout and whether a drop-in replacement is possible. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +105°C | The temperature range determines suitability for industrial and harsh-environment deployments. |
| Typical Application Focus | Seismic, energy exploration, precision industrial | Weigh scales, strain gauges, pressure sensors | The intended application focus indicates whether noise, linearity, and speed characteristics match the target use case. |
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 | ADS1232IPWRG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 31 | 24 |
| Sampling Rate(Per Second) | 4k | 80 |
| Number of Inputs | 1 | 2 |
| Input Type | Differential | Differential, Single Ended |
| Data Interface | SPI | SPI |
| Configuration | ADC | MUX-PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External |
| Voltage - Supply, Analog | 5V | 2.7V ~ 5.3V |
| Voltage - Supply, Digital | 1.65V ~ 3.6V | 2.7V ~ 5.3V |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 105°C |
Frequently asked questions
What are the primary functional differences between the ADS1282IPW and ADS1232IPWRG4?
The ADS1282IPW is a single-channel, 31-bit delta-sigma ADC designed for high-resolution seismic and energy exploration applications, featuring a programmable gain amplifier (PGA) and selectable data rates up to 4 kSPS. The ADS1232IPWRG4 is a dual-channel, 24-bit delta-sigma ADC intended for weigh scales and pressure sensors, offering a fixed gain of 1 or 128 and data rates of 10 SPS or 80 SPS. They differ in resolution, channel count, gain architecture, and target application.
Are the ADS1282IPW and ADS1232IPWRG4 pin-compatible or package-compatible?
No. The ADS1282IPW is supplied in a 28-pin TSSOP (PW) package, while the ADS1232IPWRG4 is supplied in a 24-pin TSSOP (PW) package. The pin counts and pin functions differ, so they are not drop-in replacements and require different PCB land patterns.
What are the supply voltage requirements for each device?
The ADS1282IPW operates from an analog supply (AVDD) of 4.75 V to 5.25 V and a digital supply (DVDD) of 1.8 V to 3.6 V. The ADS1232IPWRG4 operates from a single supply of 2.7 V to 5.3 V (AVDD and DVDD tied together in typical configurations). Designs must account for these differing supply architectures.
How do the data output rates compare between the two ADCs?
The ADS1282IPW supports programmable output data rates from 250 SPS to 4 kSPS in its standard operating modes. The ADS1232IPWRG4 provides two selectable data rates: 10 SPS and 80 SPS. The ADS1282IPW is therefore suited to higher-bandwidth signal acquisition, while the ADS1232IPWRG4 targets low-frequency, high-resolution measurement such as weigh scales.
Do both devices include a programmable gain amplifier (PGA)?
Yes, but with different architectures. The ADS1282IPW includes a PGA with selectable gains of 1, 2, 4, 8, 16, 32, and 64. The ADS1232IPWRG4 provides a fixed gain of 128 on its input channel (with a gain of 1 bypass path), optimized for low-level bridge sensor signals. The gain flexibility differs significantly between the two parts.
What are the typical target applications for each device?
The ADS1282IPW is intended for high-resolution seismic data acquisition, energy exploration, and precision industrial measurement requiring wide dynamic range and higher sample rates. The ADS1232IPWRG4 is intended for weigh scales, strain gauge and pressure sensor interfaces, and other low-frequency bridge-sensor applications. Application requirements should guide selection between them.
Can the ADS1232IPWRG4 directly replace the ADS1282IPW in an existing design?
No. The devices differ in package pin count (24 vs 28 pins), supply requirements, resolution (24-bit vs 31-bit), channel count (dual vs single), gain architecture, and data rate range. A direct replacement is not possible without redesigning the PCB, supply, and firmware configuration, and validating performance against the target specification.