Part A
ADS1254E/2K5
德州儀器
- Lifecycle
- Active
- Stock
- 4500 件
- Package
- SSOP-20
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS1254E/2K5 and ADS1253E/2K5 are both 24-bit delta-sigma ADCs from Texas Instruments in the same 20-pin SSOP package, sharing identical supply voltage ranges and SPI-compatible serial interfaces. The ADS1254E/2K5 offers a higher data rate of up to 20 kSPS versus 15 kSPS for the ADS1253E/2K5, while the ADS1253E/2K5 provides a lower typical power consumption. Both devices are functionally interchangeable for many low-frequency precision measurement applications, though the data rate and power consumption differences should be validated against the specific system requirements before substitution.
Resolution
High match
Package Type
High match
Data Rate
Validation required
Power Consumption
Validation required
Parts at a glance
Part B
ADS1253E/2K5
德州儀器
- Lifecycle
- Active
- Stock
- 8331 件
- Package
- SSOP-16
- Series
- 資料獲取-模數轉換器（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/2K5 | ADS1253E/2K5 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 20 | Resolution determines the smallest signal change the ADC can resolve; a 24-bit device offers finer measurement granularity than a 20-bit device. |
| Number of Input Channels | 4 (differential) | 2 (differential) | Channel count defines how many independent signals can be measured; the ADS1254 supports twice as many differential inputs. |
| Maximum Data Rate (SPS) | 20k | 20k | Data rate sets the throughput of conversions; both devices share the same maximum output rate, so speed is not a differentiator. |
| Input Type | Differential | Differential | Differential inputs reject common-mode noise and are preferred for low-level sensor measurements; both parts are differential. |
| Supply Voltage | 5 V (analog and digital) | 5 V (analog and digital) | Supply voltage must match the system rail; both operate from a single 5 V supply, simplifying substitution. |
| Interface | SPI (serial) | SPI (serial) | The digital interface determines host compatibility; both use a serial SPI interface, easing drop-in replacement. |
| Package | SSOP-20 | SSOP-20 | Package footprint must match the PCB layout; both are offered in the same SSOP-20 package. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Temperature range defines environmental suitability; identical industrial ranges mean equal robustness in the field. |
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/2K5 | 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/2K5 and ADS1253E/2K5?
The ADS1254E/2K5 is a 24-bit delta-sigma ADC with four differential inputs and a maximum data rate of 20 kSPS, while the ADS1253E/2K5 is a 24-bit delta-sigma ADC with two differential inputs and a maximum data rate of 20 kSPS. Both are offered in a 20-pin QSOP package and operate from a single 5 V analog supply with a 2.7 V to 5.25 V digital supply, but they differ in input channel count and internal architecture.
Are the ADS1254E/2K5 and ADS1253E/2K5 pin-compatible?
No. Although both devices are packaged in a 20-pin QSOP, the ADS1254E/2K5 provides four differential input channels while the ADS1253E/2K5 provides two differential input channels, so the pin functions and external input connections differ. A direct drop-in replacement is not supported without verifying the pinout against the respective datasheets.
What is the maximum data rate of each device?
Both the ADS1254E/2K5 and ADS1253E/2K5 support a maximum data rate of 20 kSPS, as specified in the respective Texas Instruments datasheets.
What resolution and architecture do these ADCs use?
Both devices are 24-bit delta-sigma analog-to-digital converters manufactured by Texas Instruments. The ADS1254E/2K5 provides four differential input channels, and the ADS1253E/2K5 provides two differential input channels, both using delta-sigma modulation with on-chip digital filtering.
What supply voltages do the ADS1254E/2K5 and ADS1253E/2K5 require?
Both devices operate from a 5 V analog supply and a digital supply ranging from 2.7 V to 5.25 V, per the Texas Instruments datasheets. Designers should confirm the exact recommended operating conditions in the latest revision of each datasheet before finalizing a power supply design.
What package and ordering suffix do the /2K5 variants indicate?
Both the ADS1254E/2K5 and ADS1253E/2K5 are supplied in a 20-pin QSOP package. The "/2K5" suffix denotes tape-and-reel packaging with 2,500 units per reel, as defined in the Texas Instruments ordering information.
Can the ADS1253E/2K5 be used as a replacement for the ADS1254E/2K5 in an existing design?
Not directly. Because the ADS1254E/2K5 offers four differential input channels and the ADS1253E/2K5 offers two, the channel count, pin functions, and input routing differ. Any substitution requires schematic and layout review against both datasheets and validation of the target design's channel requirements.
Which device should be selected for an application requiring four differential input channels?
The ADS1254E/2K5 should be selected, as it provides four differential input channels at 24-bit resolution and up to 20 kSPS. The ADS1253E/2K5 provides only two differential input channels and would not meet a four-channel requirement without external multiplexing.