Part A
ADS1219IPWR
德州儀器
- Lifecycle
- Active
- Stock
- 5923 件
- Package
- TSSOP-16
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Not a drop-in replacement
The ADS1219IPWR and ADS1212U are both 24-bit delta-sigma ADCs, but they differ fundamentally in resolution architecture, digital interface, channel configuration, and package footprint. The ADS1219IPWR offers a 4-channel multiplexed input with an I2C interface in a TSSOP-16 package, while the ADS1212U provides a single differential channel with an SPI-compatible serial interface in a SOIC-18 package. These differences in interface protocol, channel count, and physical footprint prevent direct board-level substitution without redesign.
Different digital interface
Different channel count
Different package footprint
Different input configuration
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 | ADS1212U | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 22 | Higher resolution provides finer measurement granularity; a 24-bit ADC can resolve smaller signal changes than a 22-bit device. |
| Number of input channels | 4 (differential/single-ended) | 1 (differential) | Channel count determines how many signals can be measured without external multiplexing; the ADS1219 supports multi-channel systems directly. |
| Interface type | 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 | Data rate affects measurement throughput and noise trade-off; both reach similar maximum throughput. |
| Supply voltage (analog) | 2.7 V to 5.5 V | 2.7 V to 5.25 V | Supply range must be compatible with the system rail; slight differences affect headroom and regulator selection. |
| Package | TSSOP-16 | SOIC-18 | Package footprint and pin count differ, so a board layout change is required for substitution. |
| Internal PGA | Yes (gain 1 to 128) | Yes (gain 1 to 128) | A programmable gain amplifier allows small signals to be amplified before conversion, improving effective resolution for low-level inputs. |
| Internal reference | Yes (2.048 V) | Yes (2.5 V) | The reference voltage sets the full-scale input range; different reference values change the measurement scaling and accuracy budget. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +85 °C | The temperature range determines suitability for harsh or industrial environments; the ADS1219 supports a wider range. |
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 | ADS1219IPWR | ADS1212U |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Active |
| Number of Bits | 24 | 22 |
| Sampling Rate(Per Second) | 1k | 6.25k |
| Number of Inputs | 4 | 1 |
| Input Type | Differential, Single Ended | Differential |
| Data Interface | I²C | SPI |
| Configuration | MUX-ADC | PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 2.3V ~ 5.5V | 5V |
| Voltage - Supply, Digital | 2.3V ~ 5.5V | 5V |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Ratio - S / H: ADC | 0:1 | - |
Frequently asked questions
What are the key architectural differences between the ADS1219IPWR and the ADS1212U?
The ADS1219IPWR is a 24-bit, 4-channel, delta-sigma ADC with an integrated programmable gain amplifier (PGA), voltage reference, and I2C interface, housed in a TSSOP-16 package. The ADS1212U is a 22-bit, single-channel, delta-sigma ADC with a PGA and a serial peripheral interface (SPI), housed in a SOIC-18 package. The ADS1219IPWR integrates more channels and a reference, while the ADS1212U offers higher resolution per channel with a different digital interface.
Are the ADS1219IPWR and ADS1212U pin-to-pin or package compatible?
No. The ADS1219IPWR uses a 16-pin TSSOP package, while the ADS1212U uses an 18-pin SOIC package. The pin counts, pin functions, and package footprints differ, so they are not drop-in replacements and require different PCB land patterns.
How do the digital interfaces of the ADS1219IPWR and ADS1212U differ?
The ADS1219IPWR communicates via an I2C interface, supporting standard and fast modes. The ADS1212U uses a SPI-compatible serial interface. System designers must account for these different host interface requirements when selecting between the two devices.
What are the resolution and data rate differences between the ADS1219IPWR and ADS1212U?
The ADS1219IPWR provides 24-bit resolution with programmable data rates up to 1 kSPS. The ADS1212U provides 22-bit resolution with programmable data rates up to 1 kSPS. The ADS1219IPWR offers higher nominal resolution, while both devices target low-speed, high-precision measurement applications.
Do both the ADS1219IPWR and ADS1212U include an internal voltage reference?
Yes. The ADS1219IPWR integrates an internal 2.048 V voltage reference. The ADS1212U also includes an internal reference, but its value and specifications should be confirmed from the respective manufacturer datasheets for the specific design.
What are the input channel configurations of the ADS1219IPWR and ADS1212U?
The ADS1219IPWR provides four single-ended or two differential input channels, selectable via an input multiplexer. The ADS1212U is a single-channel device with a differential input. The ADS1219IPWR is better suited for multi-sensor systems, while the ADS1212U targets single-channel precision measurement.
Can the ADS1219IPWR and ADS1212U operate from the same supply voltage?
Both devices support single-supply operation in the 2.7 V to 5.5 V range, making them compatible with common low-voltage system rails. Designers should still verify the exact supply and reference requirements from the manufacturer datasheets for each part.
Which device is more suitable for multi-channel data acquisition systems?
The ADS1219IPWR is more suitable for multi-channel data acquisition because it integrates a 4-channel input multiplexer, a PGA, a voltage reference, and an I2C interface in a single 16-pin TSSOP package. The ADS1212U is a single-channel device and would require external multiplexing for multi-channel systems.