Part A
ADS1254E
Texas Instruments
- Lifecycle
- Active
- Stock
- 4308 PCS
- Package
- SSOP-20
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS1254E and ADS1253E/2K5 are both 24-bit delta-sigma analog-to-digital converters from Texas Instruments sharing the same SOIC-20 package and 5 V supply architecture, making the ADS1253E/2K5 a viable functional replacement candidate for the ADS1254E in many designs. However, the two devices differ in channel count, sample rate, and input configuration, so system-level validation against the target application's throughput and signal-chain requirements is recommended before substitution.
Channel Count
Validation required
Sample Rate
Validation required
Package Type
High match
Supply Voltage
High match
Parts at a glance
Part B
ADS1253E/2K5
Texas Instruments
- Lifecycle
- Active
- Stock
- 8331 PCS
- Package
- SSOP-16
- 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 | ADS1254E | ADS1253E/2K5 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 20 | Higher resolution provides finer measurement granularity; a 24-bit ADC resolves smaller signal changes than a 20-bit ADC, which is critical for precision sensing applications. |
| Number of Input Channels | 4 (differential) | 1 (differential) | Channel count determines how many independent signals can be measured; a 4-channel device supports multi-sensor systems without external multiplexing, while a single-channel device suits focused single-signal designs. |
| Maximum Sample Rate (SPS) | 20k | 20k | Sample rate sets the maximum signal bandwidth that can be captured; both parts share the same throughput, so timing performance is equivalent for data acquisition. |
| Interface Type | SPI (serial) | SPI (serial) | The digital interface must match the host microcontroller; both use SPI, so firmware and bus wiring are compatible between the two parts. |
| Supply Voltage (analog) | 5 V | 5 V | Analog supply voltage determines the input signal range and reference headroom; identical 5 V supplies allow the same front-end biasing and reference design. |
| Package / Mounting | SSOP-20 (surface mount) | SSOP-20 (surface mount) | Package and footprint must match the PCB layout; identical SSOP-20 packages allow drop-in replacement without board redesign. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | The temperature range defines the environments where the part is guaranteed to meet specifications; matching industrial ranges ensure equivalent reliability in the same application. |
| Input Type | Differential | Differential | Differential inputs reject common-mode noise and improve accuracy in noisy environments; both parts offer differential sensing, preserving signal integrity. |
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 | ADS1254E | ADS1253E/2K5 |
|---|---|---|
| Supplier | - | Texas Instruments,Rochester Electronics, LLC |
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 20k | 20k |
| Number of Inputs | 4 | 4 |
| Input Type | Differential | Differential |
| 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 | 5V | 5V |
| Voltage - Supply, Digital | 1.8V ~ 3.6V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the ADS1254E and ADS1253E/2K5?
The ADS1254E is a 24-bit delta-sigma ADC with a fixed data rate of 20kSPS, while the ADS1253E/2K5 is a 24-bit delta-sigma ADC with a fixed data rate of 20kSPS in a smaller package. The ADS1254E offers a 4-channel differential input multiplexer, whereas the ADS1253E/2K5 provides a single differential input channel. Both operate from a single 5V supply and communicate via a serial interface.
Are the ADS1254E and ADS1253E/2K5 pin-compatible?
No, they are not pin-compatible. The ADS1254E is housed in a 20-pin SSOP package, while the ADS1253E/2K5 is housed in a 16-pin SSOP package. The pin counts and pin functions differ, so they cannot be used interchangeably on the same PCB footprint without redesign.
What is the resolution and data rate of each device?
Both the ADS1254E and ADS1253E/2K5 are 24-bit delta-sigma analog-to-digital converters with a fixed output data rate of 20kSPS. Neither device offers programmable data rate settings; the data rate is determined by the internal modulator and digital filter configuration.
How many input channels does each device support?
The ADS1254E features a 4-channel differential input multiplexer, allowing selection among four differential input pairs. The ADS1253E/2K5 has a single differential input channel and does not include an input multiplexer.
What supply voltage and reference requirements apply to these ADCs?
Both the ADS1254E and ADS1253E/2K5 operate from a single 5V analog supply. Each device requires an external voltage reference; the reference input range and absolute maximum ratings should be confirmed in the respective manufacturer datasheets before design.
What serial interface do the ADS1254E and ADS1253E/2K5 use?
Both devices use a synchronous serial interface compatible with SPI for communication with a host microcontroller or DSP. The interface includes serial clock, data output, and chip-select or frame-synchronization signals, with timing parameters specified in the respective datasheets.
Can the ADS1253E/2K5 be used as a drop-in replacement for the ADS1254E?
No. The ADS1253E/2K5 cannot be used as a drop-in replacement for the ADS1254E due to differences in package size, pin count, pin functions, and input channel configuration. A redesign of the PCB and firmware is required if migrating between these devices.