Part A
ADS1210U
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 5384 PCS
- Package
- SOIC-8
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1252U/2K5 and ADS1210U are both 24-bit delta-sigma analog-to-digital converters, but they differ fundamentally in resolution architecture, interface protocol, package footprint, and reference configuration, so the ADS1252U/2K5 cannot serve as a direct drop-in substitute for the ADS1210U without redesign of the interface, layout, and supporting circuitry.
Different interface protocol
Different package footprint
Different reference configuration
Different data rate architecture
Parts at a glance
Part B
ADS1252U/2K5
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 6702 PCS
- Package
- SOIC-8
- Series
- Data Acquisition - Analog to Digital Converters (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 | ADS1252U/2K5 | ADS1210U | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit delta-sigma ADCs, so resolution alone does not differentiate them for substitutability. |
| Number of input channels | 1 (single-ended) | 1 (differential) | Input configuration affects whether the part can directly interface with single-ended or differential sensors without external conditioning. |
| Maximum data rate (SPS) | 41k | 19.5k | Data rate determines the maximum sampling throughput and achievable noise performance in the target application. |
| Interface type | SPI (serial) | SPI (serial) | Both use a serial SPI-compatible interface, simplifying digital host connection and firmware reuse. |
| Supply voltage (V) | 5 | 5 | Matching supply requirements allows the same power rail design to be reused across both parts. |
| Package | SOIC-8 | SOIC-18 | Different package footprints require PCB layout changes and may affect board space and thermal considerations. |
| Internal PGA | No | Yes | An internal programmable gain amplifier allows direct connection of low-level signals without external amplification. |
| Operating temperature range (°C) | -40 to +85 | -40 to +85 | Identical temperature ratings mean both parts suit the same industrial-grade environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1210U | ADS1252U/2K5 |
|---|---|---|
| Part Status | Last Time Buy | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 16k | 40k |
| Number of Inputs | 1 | 1 |
| Input Type | Differential | Differential |
| Data Interface | SPI | SPI |
| Configuration | PGA-ADC | ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal | External |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 5V | 5V |
| Features | PGA | - |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the primary differences between the ADS1252U/2K5 and the ADS1210U?
The ADS1252U/2K5 is a 24-bit delta-sigma ADC with a fixed data rate of approximately 41.7 kSPS and a serial interface, supplied in a 16-pin SOIC package. The ADS1210U is a 24-bit delta-sigma ADC with a programmable data rate up to 15.6 kSPS, featuring a flexible SPI-compatible serial interface and additional programmable gain and calibration features, also in a 16-pin SOIC package. The ADS1252U/2K5 is optimized for higher fixed throughput, while the ADS1210U offers greater configurability at lower maximum output rates.
Are the ADS1252U/2K5 and ADS1210U pin-compatible?
No. Although both devices are offered in a 16-pin SOIC package, their pin functions and internal architectures differ. The ADS1252U/2K5 has a fixed-function pinout for its high-speed serial output, while the ADS1210U provides a different serial interface and control pin arrangement. A direct drop-in replacement is not supported; the PCB layout and interface logic must be reviewed against the respective datasheets.
What are the maximum output data rates of each device?
The ADS1252U/2K5 provides a fixed output data rate of approximately 41.7 kSPS. The ADS1210U supports a programmable output data rate with a maximum of 15.6 kSPS. Therefore, the ADS1252U/2K5 offers a higher maximum throughput, while the ADS1210U trades maximum speed for programmability.
Do both ADCs use the same serial interface protocol?
No. The ADS1252U/2K5 uses a simple, fixed-format serial output interface intended for high-speed data streaming. The ADS1210U uses an SPI-compatible serial interface with programmable registers for configuration, calibration, and gain settings. Firmware and host interface logic are not interchangeable between the two devices.
Which device is better suited for high-speed data acquisition?
The ADS1252U/2K5 is better suited for high-speed data acquisition because its fixed 41.7 kSPS output rate exceeds the 15.6 kSPS maximum of the ADS1210U. The ADS1210U is preferable when programmable gain, calibration, and lower-speed precision measurements are required.
Do both devices support programmable gain and calibration?
No. The ADS1210U includes programmable gain and calibration features accessible through its serial registers. The ADS1252U/2K5 is a fixed-function converter without programmable gain or calibration registers. Designs requiring in-system gain adjustment or calibration should use the ADS1210U.
Are both devices available in the same package type?
Yes. Both the ADS1252U/2K5 and the ADS1210U are offered in a 16-pin SOIC package. However, identical package type does not imply pin compatibility, so the pinout and surrounding circuitry must be verified separately for each device.
Can the ADS1210U be used as a direct substitute for the ADS1252U/2K5 in an existing design?
No. Because the two devices differ in pinout, serial interface protocol, maximum data rate, and programmable feature set, the ADS1210U cannot be used as a direct drop-in substitute for the ADS1252U/2K5. Any substitution requires schematic, layout, and firmware changes validated against the manufacturer datasheets.