Part A
ADS1232IPW
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 7294 個数
- Package
- TSSOP-24
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS1232IPW and ADS1224IPWTG4 are both 24-bit delta-sigma ADCs in a TSSOP-20 package with a similar serial interface, making the ADS1224IPWTG4 a viable functional replacement candidate for the ADS1232IPW in low-speed, high-resolution sensing applications. However, the two devices differ in input channel configuration, integrated gain stage, and reference architecture, so the replacement requires validation against the target signal chain before production adoption.
Resolution and Architecture
Validation required
Input Channel Configuration
Not compatible
Integrated Gain Stage
Not compatible
Package Type
High match
Parts at a glance
Part B
ADS1224IPWTG4
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 4125 個数
- Package
- TSSOP-20
- Series
- データ取得 - アナログ/デジタルコンバータ (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 | ADS1232IPW | 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 sensors or signal sources can be connected without external multiplexing. |
| Input type | Differential | Differential / single-ended | Single-ended capability in the ADS1224 allows simpler wiring for ground-referenced signals, while the ADS1232 is differential-only. |
| PGA gain settings | 1, 2, 64, 128 | 1, 2, 4, 8, 16, 32, 64, 128 | More gain steps allow finer scaling of small sensor signals, affecting achievable effective resolution for low-level inputs. |
| Data rate (SPS) | 10, 80 | Up to 120 (selectable) | Output data rate affects noise versus speed trade-off and suitability for different sampling requirements. |
| Interface | SPI-compatible (2-wire) | SPI-compatible | Digital interface compatibility determines whether the part can drop into an existing microcontroller bus without firmware changes. |
| Supply voltage | 2.7 V to 5.3 V | 2.7 V to 5.5 V | Supply range must cover the system rail; slight differences affect margin at the upper rail limit. |
| Package | TSSOP-24 | TSSOP-20 | Different pin counts and footprints mean the parts are not drop-in replacements on the same PCB layout. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings mean both suit the same industrial environments. |
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 | ADS1232IPW | ADS1224IPWTG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 80 | 240 |
| Number of Inputs | 2 | 2 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-PGA-ADC | MUX-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.7V ~ 5.3V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.3V | 2.7V ~ 5.5V |
| Features | PGA | Temperature Sensor |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 85°C |
Frequently asked questions
What are the primary functional differences between the ADS1232IPW and ADS1224IPWTG4?
The ADS1232IPW is a 24-bit, 2-channel delta-sigma ADC with an integrated low-noise PGA, designed primarily for weigh-scale and bridge sensor applications. The ADS1224IPWTG4 is a 24-bit, 4-channel delta-sigma ADC with a fixed gain of 1 or 128 and an integrated input multiplexer, intended for multi-sensor and general-purpose precision measurement. The ADS1232IPW offers selectable gain of 1, 2, 64, or 128, while the ADS1224IPWTG4 provides a 4-channel input MUX and a different gain architecture.
Are the ADS1232IPW and ADS1224IPWTG4 pin-to-pin compatible?
No. The ADS1232IPW is supplied in a 24-pin TSSOP (PW) package, while the ADS1224IPWTG4 is supplied in a 20-pin TSSOP (PW) package. The differing pin counts and pin functions mean they are not drop-in replacements and require different PCB footprints.
What are the resolution and data rate specifications for each device?
Both devices are 24-bit delta-sigma ADCs. The ADS1232IPW supports data rates of 10 SPS and 80 SPS (selectable). The ADS1224IPWTG4 supports data rates of 5 SPS and 20 SPS. Designers should select based on required update rate versus noise performance trade-offs documented in the respective datasheets.
How do the input channel configurations differ between the two parts?
The ADS1232IPW provides two differential input channels (AINP1/AINN1 and AINP2/AINN2) with an integrated PGA. The ADS1224IPWTG4 provides a 4-channel input multiplexer that can be configured as four single-ended or two differential inputs, with a fixed gain stage. This makes the ADS1224IPWTG4 better suited to multi-sensor systems, while the ADS1232IPW targets dual-bridge weigh-scale designs.
Do both devices include an integrated PGA?
Yes, both include an integrated programmable gain amplifier, but the gain options differ. The ADS1232IPW offers selectable gains of 1, 2, 64, and 128. The ADS1224IPWTG4 provides a gain of 1 or 128. The appropriate gain setting depends on the sensor output amplitude and the reference voltage used.
What are the supply voltage requirements for the ADS1232IPW and ADS1224IPWTG4?
Both devices operate from a single analog supply in the 2.7 V to 5.5 V range, with a separate digital supply. The ADS1232IPW supports an analog supply of 2.7 V to 5.5 V and a digital supply of 2.7 V to 5.5 V. The ADS1224IPWTG4 similarly supports a 2.7 V to 5.5 V analog supply and a 2.7 V to 5.5 V digital supply. Exact limits should be confirmed against the latest manufacturer datasheets.
Which device is more suitable for a multi-sensor measurement system?
The ADS1224IPWTG4 is generally more suitable for multi-sensor systems because it integrates a 4-channel input multiplexer, allowing multiple sensors to be sequenced through a single ADC. The ADS1232IPW provides only two differential input channels, making it better suited to dual-bridge or two-sensor designs such as weigh scales.
Can the ADS1232IPW and ADS1224IPWTG4 share the same external reference and clock configuration?
Both devices support an external reference and can operate from an external clock source, but the specific reference input pins and clock requirements differ between the 24-pin ADS1232IPW and the 20-pin ADS1224IPWTG4. The reference voltage range and clock frequency limits must be verified separately in each datasheet before sharing a common reference or clock in a design.