Part A
ADS1241E
Texas Instruments
- Lifecycle
- Active
- Stock
- 1322 PCS
- Package
- SSOP-28
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1220IPWR and ADS1241E are both 24-bit delta-sigma ADCs, but they differ fundamentally in resolution architecture, input channel configuration, package footprint, and digital interface, so the ADS1241E cannot serve as a direct drop-in substitute for the ADS1220IPWR without redesign of the surrounding circuitry and PCB layout.
Different channel count
Different package footprint
Different digital interface
Different input architecture
Parts at a glance
Part B
ADS1220IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 6260 PCS
- Package
- TSSOP-16
- 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 | ADS1220IPWR | ADS1241E | 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 (differential) | 2 | 4 | The ADS1241E supports more differential inputs, allowing more sensors to be multiplexed without external switching. |
| Interface | SPI | SPI | Both use SPI, so the host microcontroller interface is compatible between the two parts. |
| PGA gain range | 1 to 128 | 1 to 128 | Matching PGA ranges mean similar small-signal amplification capability for low-level sensor inputs. |
| Data rate (max SPS) | 2000 | 1000 | The ADS1220IPWR offers a higher maximum output data rate, which matters for faster sampling applications. |
| Supply voltage (analog, V) | 2.3 to 5.5 | 2.7 to 5.25 | Slightly different analog supply ranges affect compatibility with low-voltage or 5 V systems. |
| Package | TSSOP-16 | SSOP-28 | Different package footprints and pin counts prevent direct drop-in board replacement. |
| Internal reference | Yes | No | The ADS1220IPWR includes an internal voltage reference, while the ADS1241E requires an external reference, affecting BOM and accuracy design. |
| Operating temperature range (°C) | -40 to 125 | -40 to 85 | The wider temperature range of the ADS1220IPWR suits harsher environments than the ADS1241E. |
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 | ADS1241E | ADS1220IPWR |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 15 | 2k |
| Number of Inputs | 8 | 2, 4 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-PGA-ADC | MUX-PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External, Internal, Supply |
| Voltage - Supply, Analog | 2.7V ~ 3.3V, 5V | 2.3V ~ 5.5V, ±2.5 |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.3V ~ 5.5V |
| Features | PGA | PGA, Temperature Sensor |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
Frequently asked questions
What are the primary differences between the ADS1220IPWR and the ADS1241E?
The ADS1220IPWR is a 24-bit, 4-channel, 2-kSPS delta-sigma ADC with an integrated PGA, voltage reference, and SPI interface in a TSSOP-16 package. The ADS1241E is a 24-bit, 8-channel, 15-SPS delta-sigma ADC with a PGA and SPI interface in a TSSOP-28 package. Key differences include channel count (4 vs 8), maximum data rate (2 kSPS vs 15 SPS), package size, and integration level.
Can the ADS1220IPWR and ADS1241E be used interchangeably in an existing design?
No. The two devices differ in package footprint (TSSOP-16 vs TSSOP-28), pinout, channel count, and maximum data rate. A direct drop-in replacement is not possible; any substitution requires a PCB redesign and firmware changes validated against the respective datasheets.
How do the maximum data rates of the ADS1220IPWR and ADS1241E compare?
The ADS1220IPWR supports programmable data rates up to 2 kSPS in normal mode. The ADS1241E supports data rates up to 15 SPS. The ADS1220IPWR is therefore better suited for applications requiring higher sample throughput, while the ADS1241E targets low-speed, high-resolution measurement applications.
How many input channels does each device provide?
The ADS1220IPWR provides 4 single-ended or 2 differential input channels. The ADS1241E provides 8 single-ended or 4 differential input channels. The ADS1241E offers more channels for multi-sensor systems, while the ADS1220IPWR suits compact designs with fewer inputs.
Do both devices include a programmable gain amplifier (PGA) and internal voltage reference?
Yes. Both the ADS1220IPWR and ADS1241E integrate a low-noise PGA and an internal voltage reference, reducing external component count for precision sensor measurement. Gain and reference settings should be configured per the respective datasheets.
What digital interface do the ADS1220IPWR and ADS1241E use?
Both devices use a SPI-compatible serial interface for configuration and data readout. The exact command set, register map, and timing requirements differ between the two devices, so firmware must be adapted accordingly.
Which device is more suitable for low-power, compact sensor nodes?
The ADS1220IPWR is generally more suitable for compact, low-power sensor nodes due to its smaller TSSOP-16 package, 4-channel input, and higher data rate capability. The ADS1241E, with its TSSOP-28 package and 8 channels, is better suited to multi-channel, low-speed precision measurement systems. Final selection should be based on supply current, package constraints, and required resolution validated from the datasheets.