Part A
ADS1282IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 3098 PCS
- Package
- TSSOP-28
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1282IPWR and ADS1224IPWTG4 are both 24-bit delta-sigma ADCs, but they differ fundamentally in resolution architecture, input configuration, package footprint, and interface timing, so neither device can be substituted for the other without a full board and firmware redesign.
Different input architecture
Different package footprint
Different interface timing
Different reference scheme
Parts at a glance
Part B
ADS1224IPWTG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 4125 PCS
- Package
- TSSOP-20
- 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 | ADS1282IPWR | ADS1224IPWTG4 | 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. |
| Number of Input Channels | 2 (differential) | 4 (differential) | More input channels allow multiplexing of additional sensors without adding external components. |
| Architecture | Delta-Sigma | Delta-Sigma | Both use delta-sigma conversion, but the specific modulator design affects noise performance and filter characteristics. |
| Sampling Rate (max) | 4 kSPS | 240 SPS | Higher sampling rate supports faster-changing signals and wider signal bandwidth in the application. |
| Supply Voltage (analog) | 5 V (analog), 3.3 V (digital) | 2.7 V to 5.5 V | Supply requirements determine compatibility with the system power rail and level-shifting needs. |
| Interface | SPI | SPI | Both use SPI, but timing and register maps differ, affecting firmware portability. |
| Package | TSSOP-28 | TSSOP-20 | Different package footprints require PCB layout changes and are not drop-in compatible. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical temperature ratings mean both suit the same industrial environmental conditions. |
| Internal PGA | Yes (1x to 64x) | Yes (1x to 128x) | Programmable gain amplifies low-level sensor signals before conversion, affecting dynamic range and small-signal sensitivity. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1282IPWR | ADS1224IPWTG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 31 | 24 |
| Sampling Rate(Per Second) | 4k | 240 |
| Number of Inputs | 1 | 2 |
| Input Type | Differential | Differential, Single Ended |
| Data Interface | SPI | SPI |
| Configuration | ADC | MUX-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External |
| Voltage - Supply, Analog | 5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 1.65V ~ 3.6V | 2.7V ~ 5.5V |
| Features | PGA | Temperature Sensor |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the primary functional differences between the ADS1282IPWR and the ADS1224IPWTG4?
The ADS1282IPWR is a 31-bit, single-channel, delta-sigma analog-to-digital converter designed for seismic and high-resolution measurement applications, featuring a programmable gain amplifier and operating from a 5 V analog supply. The ADS1224IPWTG4 is a 24-bit, 4-channel, delta-sigma ADC with an integrated input multiplexer, designed for sensor measurement applications and operating from a 2.7 V to 5.5 V supply. The ADS1282 offers higher resolution and a single differential input, while the ADS1224 provides lower resolution but multiple input channels.
Are the ADS1282IPWR and ADS1224IPWTG4 pin-compatible or package-compatible?
No. The ADS1282IPWR is supplied in a TSSOP-28 package, while the ADS1224IPWTG4 is supplied in a TSSOP-20 package. The different pin counts and pin functions mean the two devices are not pin-compatible and cannot be interchanged on the same PCB land pattern without redesign.
Do the ADS1282IPWR and ADS1224IPWTG4 support the same number of input channels?
No. The ADS1282IPWR provides a single differential analog input channel, whereas the ADS1224IPWTG4 includes a 4-channel input multiplexer that allows selection among four single-ended or two differential input configurations. The channel count difference is a key selection criterion between the two parts.
How do the resolution and data rate specifications compare between the ADS1282IPWR and ADS1224IPWTG4?
The ADS1282IPWR offers up to 31-bit resolution with programmable data rates suitable for high-resolution seismic and precision measurement applications. The ADS1224IPWTG4 offers 24-bit resolution with a maximum data rate of 120 SPS. The ADS1282 targets higher-resolution, lower-noise applications, while the ADS1224 targets general-purpose multi-channel sensor measurement.
Can the ADS1224IPWTG4 be used as a drop-in replacement for the ADS1282IPWR in an existing design?
No. The two devices differ in package (TSSOP-20 vs TSSOP-28), channel count (4-channel multiplexed vs single differential), resolution (24-bit vs 31-bit), and supply requirements. A direct drop-in replacement is not possible; any substitution requires schematic, layout, and firmware changes validated against the respective manufacturer datasheets.
What are the supply voltage requirements for the ADS1282IPWR and ADS1224IPWTG4?
The ADS1282IPWR operates from a 5 V analog supply (with a separate digital supply), while the ADS1224IPWTG4 operates from a single supply ranging from 2.7 V to 5.5 V. Designs migrating between the two parts must account for these differing supply architectures and decoupling requirements.
Which device is better suited for multi-sensor data acquisition systems?
The ADS1224IPWTG4 is generally better suited for multi-sensor data acquisition because its integrated 4-channel input multiplexer allows multiple sensors to be connected to a single ADC. The ADS1282IPWR, with its single differential input and higher resolution, is better suited for single-channel high-precision measurements such as seismology or precision weigh scales.