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 ADS1219IPWR and ADS1241E are both 24-bit delta-sigma ADCs, but they differ fundamentally in resolution architecture, channel count, package footprint, and digital interface, so the ADS1241E cannot serve as a direct drop-in substitute for the ADS1219IPWR without redesign of the interface, layout, and signal chain.
Different channel count
Different digital interface
Different package footprint
Different input architecture
Parts at a glance
Part B
ADS1219IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 5923 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 | ADS1219IPWR | ADS1241E | 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 | 4 (single-ended) / 2 (differential) | 8 (single-ended) / 4 (differential) | Channel count determines how many signals can be measured; the ADS1241E supports twice as many inputs. |
| Interface | I2C | SPI | The digital interface must match the host controller; I2C and SPI are not directly interchangeable without redesign. |
| Maximum data rate (SPS) | 1000 | 1000 | Both reach 1 kSPS, so throughput is comparable for most low-speed precision applications. |
| PGA / gain stages | 1 (no PGA) | 1 to 128 | An integrated PGA allows direct amplification of small signals; the ADS1241E can handle low-level sensors without external gain. |
| Supply voltage (analog) | 2.7 V to 5.5 V | 2.7 V to 5.25 V | Supply ranges are nearly identical, easing power-rail compatibility in most designs. |
| Package | TSSOP-16 | SSOP-28 | Different package footprints and pin counts prevent direct board-level drop-in replacement. |
| Internal reference | Yes | No | An internal reference simplifies design and saves board space; the ADS1241E requires an external reference. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +85 °C | The wider temperature range of the ADS1219IPWR suits harsher environments and industrial applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1241E | ADS1219IPWR |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 15 | 1k |
| Number of Inputs | 8 | 4 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | SPI | I²C |
| Configuration | MUX-PGA-ADC | MUX-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 3.3V, 5V | 2.3V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.3V ~ 5.5V |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
| Ratio - S / H: ADC | - | 0:1 |
Frequently asked questions
What are the key architectural differences between the ADS1219IPWR and the ADS1241E?
The ADS1219IPWR is a 24-bit, 4-channel, delta-sigma ADC with an integrated PGA, voltage reference, and I2C interface, housed in a TSSOP-16 package. The ADS1241E is a 24-bit, 8-channel, delta-sigma ADC with a PGA and SPI interface, housed in a TSSOP-28 package. The ADS1219IPWR integrates the reference and supports I2C, while the ADS1241E requires an external reference and uses SPI.
Can the ADS1219IPWR and ADS1241E be used as direct drop-in replacements for each other?
No. The two devices differ in package footprint (TSSOP-16 vs TSSOP-28), pin count, communication interface (I2C vs SPI), channel count (4 vs 8), and reference architecture (integrated vs external). A direct PCB drop-in replacement is not possible without redesign.
How do the communication interfaces of the ADS1219IPWR and ADS1241E differ?
The ADS1219IPWR uses an I2C interface supporting standard, fast, and fast-plus modes, requiring only two signal lines (SCL and SDA). The ADS1241E uses a SPI-compatible serial interface with separate DIN, DOUT, SCLK, and CS lines, allowing higher throughput and simpler daisy-chaining in some systems.
What are the input channel configurations of the ADS1219IPWR and ADS1241E?
The ADS1219IPWR provides 4 single-ended or 2 differential input channels. The ADS1241E provides 8 single-ended or 4 differential input channels, offering twice the channel density for multi-sensor applications.
Do the ADS1219IPWR and ADS1241E have integrated voltage references?
The ADS1219IPWR includes an integrated 2.048 V voltage reference, reducing external component count. The ADS1241E does not include an integrated reference and requires an external voltage reference for ratiometric or absolute measurements.
How do the package and pin count of the ADS1219IPWR and ADS1241E compare?
The ADS1219IPWR is supplied in a 16-pin TSSOP package, while the ADS1241E is supplied in a 28-pin TSSOP package. The larger pin count of the ADS1241E accommodates additional input channels, SPI signals, and external reference connections.
Which device is better suited for multi-channel sensor systems with limited board space?
The ADS1219IPWR is better suited for compact, lower-channel-count systems because it integrates the reference and uses a smaller 16-pin package with a two-wire I2C interface. The ADS1241E is preferable when more channels (up to 8 single-ended) and SPI communication are required, at the cost of a larger footprint and external reference.