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 ADS1232IPWG4 are both 24-bit delta-sigma ADCs, but they differ fundamentally in resolution architecture, input configuration, interface protocol, and package footprint, so neither device can directly substitute for the other without a full board and firmware redesign.
Different input architecture
Different interface protocol
Different package footprint
Different reference topology
Parts at a glance
Part B
ADS1232IPWG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 3840 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 | ADS1232IPWG4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 32 | 24 | Higher resolution provides finer measurement granularity; a 32-bit ADC can resolve much smaller signal changes than a 24-bit device. |
| Architecture | Delta-Sigma (with PGA) | Delta-Sigma (with PGA) | Both use delta-sigma conversion, but the ADS1282 is optimized for high-resolution seismic/energy exploration while the ADS1232 targets weigh-scale and bridge sensor applications. |
| Input Channels | 2 differential | 2 differential | Channel count determines how many independent differential signals can be measured; both offer two differential inputs. |
| Data Rate (SPS) | Up to 4000 | 10 or 80 | Maximum output data rate affects achievable sampling bandwidth; the ADS1282 supports much higher throughput than the ADS1232. |
| PGA Gain Range | 1 to 64 | 1 to 128 | Programmable gain amplifies small sensor signals; the ADS1232 offers higher maximum gain for low-level bridge outputs. |
| Supply Voltage | 2.7 V to 5.25 V (analog), 1.8 V to 3.6 V (digital) | 2.7 V to 5.25 V | Supply requirements determine system power compatibility; the ADS1282 has separate analog and digital rails. |
| Interface | SPI | SPI | Both use a serial SPI interface, simplifying microcontroller connection and firmware reuse. |
| Package | TSSOP-28 | TSSOP-24 | Package footprint and pin count affect PCB layout and drop-in compatibility; the two devices are not pin-compatible. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Both support industrial temperature ranges, suitable for harsh-environment applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1282IPW | ADS1232IPWG4 |
|---|---|---|
| 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 differences between the ADS1282IPW and ADS1232IPWG4?
The ADS1282IPW is a 31-bit delta-sigma ADC with a maximum data rate of 4 kSPS, featuring a programmable gain amplifier and supporting a 5 V analog supply with a 2.5 V reference. The ADS1232IPWG4 is a 24-bit delta-sigma ADC with a maximum data rate of 80 SPS, integrating a low-noise PGA with gains of 1, 2, 64, and 128, and operating from a 5 V analog supply. The ADS1282IPW targets high-resolution seismic and energy exploration applications, while the ADS1232IPWG4 targets weigh scales and strain gauge applications.
Are the ADS1282IPW and ADS1232IPWG4 pin-compatible?
No. The ADS1282IPW is supplied in a 28-pin TSSOP package, while the ADS1232IPWG4 is supplied in a 24-pin TSSOP package. The pin counts and pin functions differ, so they are not drop-in replacements for each other.
What are the maximum data rates of the ADS1282IPW and ADS1232IPWG4?
The ADS1282IPW supports a maximum data rate of 4 kSPS. The ADS1232IPWG4 supports a maximum data rate of 80 SPS. The ADS1282IPW is therefore suitable for higher-speed acquisition, while the ADS1232IPWG4 is intended for low-speed, high-resolution measurement.
What resolution does each ADC provide?
The ADS1282IPW is a 31-bit delta-sigma ADC. The ADS1232IPWG4 is a 24-bit delta-sigma ADC. The ADS1282IPW offers higher nominal resolution, while the ADS1232IPWG4 provides 24-bit resolution with an integrated low-noise PGA.
What PGA gain options are available on each device?
The ADS1282IPW includes a programmable gain amplifier with gain settings of 1, 2, 4, 8, 16, 32, and 64. The ADS1232IPWG4 integrates a PGA with gain settings of 1, 2, 64, and 128. The gain options differ, so system gain planning must be re-evaluated if considering a substitution.
What are the analog supply and reference requirements for these ADCs?
Both devices operate from a 5 V analog supply. The ADS1282IPW uses a 2.5 V reference and supports a bipolar analog supply arrangement. The ADS1232IPWG4 operates from a 5 V analog supply with a reference input typically derived from the supply or an external reference. Designers should verify the exact reference and supply configuration against the respective datasheets.
Can the ADS1232IPWG4 directly replace the ADS1282IPW in an existing design?
No. The devices differ in package pin count (28-pin vs 24-pin TSSOP), resolution (31-bit vs 24-bit), maximum data rate (4 kSPS vs 80 SPS), and PGA gain options. A direct replacement is not possible without redesigning the PCB layout, revalidating the signal chain, and confirming firmware compatibility.
What are the typical target applications for each device?
The ADS1282IPW is typically used in seismic data acquisition, energy exploration, and high-resolution industrial measurement systems. The ADS1232IPWG4 is typically used in weigh scales, strain gauge bridges, and low-speed precision sensor interfaces. Application requirements should be matched to the verified datasheet specifications of each device.