Part A
ADS1219IPWR
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 5923 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1219IPWR and ADS1256IDBRG4 are not drop-in replacements for one another. They differ in resolution, channel count, package footprint, and communication interface, so a direct board-level substitution is not possible without redesign.
Different resolution
Different channel count
Different package footprint
Different interface type
Parts at a glance
Part B
ADS1256IDBRG4
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 7726 PCS
- Package
- SSOP-28
- 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 | ADS1256IDBRG4 | 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 | 4 (single-ended or 2 differential) | 8 (single-ended or 4 differential) | Channel count determines how many signals can be measured; the ADS1256 supports twice as many inputs, affecting system architecture. |
| Maximum sample rate (SPS) | 1000 | 30000 | Sample rate limits the bandwidth of signals that can be captured; the ADS1256 is far faster, suiting higher-speed acquisition. |
| Interface | I2C | SPI | The digital interface must match the host microcontroller; I2C and SPI are not directly interchangeable without redesign. |
| Supply voltage (analog) | 2.7 V to 5.5 V | 5 V (4.75 V to 5.25 V) | Supply requirements affect power design and compatibility; the ADS1219 is more flexible across lower-voltage systems. |
| Internal PGA gain range | 1 to 128 | 1 to 64 | PGA gain sets the smallest resolvable input signal; the ADS1219 offers higher gain for very low-level sensors. |
| Package | 16-pin TSSOP | 28-pin SSOP | Package footprint and pin count differ, so PCB layout and assembly cannot be reused directly between the two parts. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +85 °C | Temperature range affects suitability for harsh environments; the ADS1219 supports a wider high-temperature margin. |
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 | ADS1256IDBRG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 1k | 30k |
| Number of Inputs | 4 | 4, 8 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | I²C | SPI |
| Configuration | MUX-ADC | MUX-PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal | External |
| Voltage - Supply, Analog | 2.3V ~ 5.5V | 5V |
| Voltage - Supply, Digital | 2.3V ~ 5.5V | 1.8V ~ 3.6V |
| 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 ADS1256IDBRG4?
The ADS1219IPWR is a 4-channel, 24-bit delta-sigma ADC with a fixed gain stage and integrated PGA, housed in a TSSOP-16 package. The ADS1256IDBRG4 is an 8-channel, 24-bit delta-sigma ADC with a PGA, input multiplexer, and GPIO, housed in an SSOP-28 package. The ADS1256 offers more input channels and a higher programmable gain range, while the ADS1219 provides a smaller footprint and simpler register map.
What are the maximum sampling rates of the ADS1219IPWR and ADS1256IDBRG4?
The ADS1219IPWR supports data rates up to 1 kSPS in normal mode and up to 2 kSPS in turbo mode. The ADS1256IDBRG4 supports programmable data rates up to 30 kSPS. The ADS1256 is therefore better suited for higher-speed acquisition, while the ADS1219 targets low-speed, high-resolution sensor applications.
Do the ADS1219IPWR and ADS1256IDBRG4 have the same digital interface?
Both devices use an SPI-compatible serial interface, but their protocol details differ. The ADS1219IPWR uses a 4-wire SPI interface with a fixed command set and supports CRC on data. The ADS1256IDBRG4 uses a 4-wire SPI interface with a different command set, includes a DRDY signal, and supports daisy-chaining. Firmware cannot be reused without modification.
What are the supply voltage requirements for the ADS1219IPWR and ADS1256IDBRG4?
The ADS1219IPWR operates from an analog supply of 2.7 V to 5.5 V and a digital supply of 1.65 V to 5.5 V. The ADS1256IDBRG4 operates from an analog supply of 5 V (4.75 V to 5.25 V) and a digital supply of 1.8 V to 3.6 V. The ADS1219 offers a wider analog supply range, while the ADS1256 requires a regulated 5 V analog rail.
Are the ADS1219IPWR and ADS1256IDBRG4 pin-compatible or package-compatible?
No. The ADS1219IPWR is supplied in a TSSOP-16 package, while the ADS1256IDBRG4 is supplied in an SSOP-28 package. The pin counts, pin functions, and PCB land patterns differ, so these devices are not drop-in replacements for each other.
Which device offers more input channels and how does that affect system design?
The ADS1256IDBRG4 provides 8 single-ended or 4 differential input channels, whereas the ADS1219IPWR provides 4 single-ended or 2 differential input channels. For multi-sensor systems requiring more than four single-ended inputs, the ADS1256 avoids external multiplexing, while the ADS1219 suits compact designs with fewer channels.
How do the PGA gain ranges compare between the ADS1219IPWR and ADS1256IDBRG4?
The ADS1219IPWR offers programmable gains of 1, 2, 4, 8, 16, 32, 64, and 128. The ADS1256IDBRG4 offers programmable gains of 1, 2, 4, 8, 16, 32, and 64. The ADS1219 supports a higher maximum gain of 128, which can benefit very-low-level signal acquisition, while the ADS1256 tops out at gain 64.
What are the typical noise performance differences between the ADS1219IPWR and ADS1256IDBRG4?
Both are 24-bit delta-sigma converters, but their noise specifications differ by data rate and gain. The ADS1219IPWR achieves low noise at data rates up to 1 kSPS, while the ADS1256IDBRG4 specifies noise performance across data rates up to 30 kSPS. Designers should consult the respective datasheet noise tables for the exact gain and data-rate combination used in their application.
Can the ADS1219IPWR directly replace the ADS1256IDBRG4 in an existing design?
No. The devices differ in package, pin count, supply requirements, channel count, SPI command set, and maximum data rate. A direct replacement is not possible without PCB redesign and firmware changes, and the replacement must be validated against the manufacturer datasheets for the target design.