Part A
ADS1222IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 3095 PCS
- Package
- TSSOP-14
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS1222IPWR and ADS1224IPWTG4 are both 24-bit delta-sigma analog-to-digital converters from Texas Instruments sharing a compatible TSSOP-20 package and 2.7 V to 5.5 V supply range, making them viable functional replacement candidates. However, the ADS1224IPWTG4 offers a 4-channel input multiplexer versus the 2-channel configuration of the ADS1222IPWR, and the two devices differ in their serial interface and data rate characteristics. Designers should validate channel count requirements, interface timing, and sampling rate against the target application before substituting one for the other.
Resolution
High match
Package Type
High match
Input Channel Count
Validation required
Serial Interface
Validation required
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 | ADS1222IPWR | ADS1224IPWTG4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit delta-sigma ADCs, so resolution alone does not distinguish them for substitutability. |
| Number of input channels | 2 (differential) | 4 (single-ended, 2 differential) | Channel count determines how many signals can be measured; the ADS1224 offers more input flexibility. |
| Input type | Differential | Single-ended / Differential | Input configuration affects sensor interfacing and noise rejection; the ADS1224 supports both single-ended and differential inputs. |
| Data rate (SPS) | Up to 105 SPS | Up to 120 SPS | Maximum sample rate affects achievable measurement bandwidth and settling time in the application. |
| Interface | SPI (serial) | SPI (serial) | Both use a serial SPI interface, so host microcontroller compatibility is similar. |
| Supply voltage (V) | 2.7 to 5.5 | 2.7 to 5.5 | Supply range determines compatibility with the system power rail; both support the same 2.7–5.5 V range. |
| Package | TSSOP-16 | TSSOP-16 | Package footprint affects PCB layout and drop-in substitutability; both share the same TSSOP-16 footprint. |
| Internal PGA | No | No | Absence of an internal PGA means external gain stages may be needed for small signals in both parts. |
| Operating temperature range (°C) | -40 to 85 | -40 to 85 | Temperature range determines suitability for industrial and harsh environments; both cover the same industrial range. |
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 | ADS1222IPWR | ADS1224IPWTG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 240 | 240 |
| Number of Inputs | 2 | 2 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-ADC | MUX-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Features | Temperature Sensor | Temperature Sensor |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key architectural differences between the ADS1222IPWR and ADS1224IPWTG4?
The ADS1222IPWR is a 24-bit delta-sigma ADC with a 2-channel differential input multiplexer, while the ADS1224IPWTG4 is a 24-bit delta-sigma ADC with a 4-channel differential input multiplexer. Both devices integrate a PGA and are intended for high-resolution, low-frequency measurement applications, but the ADS1224IPWTG4 provides twice the input channel count of the ADS1222IPWR.
Are the ADS1222IPWR and ADS1224IPWTG4 pin-compatible?
No. The ADS1222IPWR is supplied in a TSSOP-16 package, and the ADS1224IPWTG4 is supplied in a TSSOP-20 package. The differing package sizes and pin counts mean the two devices are not drop-in replacements and require different PCB land patterns.
Do both devices support the same supply voltage range?
Both the ADS1222IPWR and ADS1224IPWTG4 operate from a single analog supply in the 2.7 V to 5.5 V range, with a separate digital supply also specified in the same range, per the respective manufacturer datasheets. Designers should still confirm the exact recommended operating conditions in the latest datasheet revision for each part.
How do the input channel configurations compare?
The ADS1222IPWR provides a 2-channel differential input multiplexer, whereas the ADS1224IPWTG4 provides a 4-channel differential input multiplexer. This makes the ADS1224IPWTG4 better suited to systems requiring more sensor inputs without adding external multiplexing, while the ADS1222IPWR suits simpler two-input measurement designs.
Can the ADS1222IPWR and ADS1224IPWTG4 be used interchangeably in an existing design?
No. Because the two devices differ in package (TSSOP-16 versus TSSOP-20) and input multiplexer channel count (2 versus 4), they cannot be used interchangeably without redesigning the PCB layout and revalidating the signal chain against the target datasheet specifications.
What resolution and ADC type do these devices offer?
Both the ADS1222IPWR and ADS1224IPWTG4 are 24-bit delta-sigma analog-to-digital converters. They are intended for high-resolution, low-noise measurement of low-frequency signals such as bridge sensors, thermocouples, and other precision transducer outputs.
Which device should be selected for a multi-sensor precision measurement application?
The ADS1224IPWTG4 is the more suitable choice when more than two differential inputs are required, since it provides a 4-channel differential multiplexer. The ADS1222IPWR is appropriate when only two differential inputs are needed and a smaller TSSOP-16 footprint is preferred. Final selection should be validated against the latest manufacturer datasheets for both parts.