Part A
ADS1222IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 3095 PCS
- Package
- TSSOP-14
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1263IPW and ADS1222IPWR are not drop-in replacements for one another. The ADS1263IPW is a 32-bit, 10-channel precision ADC with an integrated PGA and dual excitation current sources in a TSSOP-28 package, while the ADS1222IPWR is a 24-bit, 2-channel ADC in a TSSOP-20 package. The differences in resolution, channel count, package footprint, and integrated feature set make direct substitution impractical without a full redesign of the signal chain and PCB layout.
Different channel count
Different resolution
Different footprint
Different integrated features
Parts at a glance
Part B
ADS1263IPW
Texas Instruments
- Lifecycle
- Active
- Stock
- 4618 PCS
- Package
- TSSOP-28
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (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 | ADS1263IPW | ADS1222IPWR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 32 | 24 | Higher resolution enables detection of smaller signal changes, which is critical for precision measurement applications. |
| Number of input channels | 10 (5 differential / 10 single-ended) | 2 (2 differential) | More channels allow monitoring of multiple sensors with a single ADC, reducing component count and board space. |
| Maximum sample rate | 38.4 kSPS | 2 kSPS | Higher sample rates support faster-changing signals and higher-bandwidth measurement requirements. |
| Interface type | SPI | SPI | Both use SPI, so the host microcontroller interface is compatible, but the ADS1263 supports higher clock rates. |
| Integrated PGA | Yes (gain 1 to 32) | Yes (gain 1 to 128) | A programmable gain amplifier allows direct connection of low-level sensors without external amplification. |
| Supply voltage (analog) | 4.75 V to 5.25 V (AVDD), 2.7 V to 5.25 V (DVDD) | 2.7 V to 5.5 V | Supply range determines compatibility with the system power rail and low-voltage operation capability. |
| Package | 28-pin TSSOP | 16-pin TSSOP | Different package footprints require PCB layout changes and affect board space and thermal performance. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +85 °C | Wider temperature range supports use in harsh industrial environments and ensures reliability under thermal stress. |
| Internal reference | Yes (2.5 V) | No (external reference required) | An internal reference simplifies design and reduces external component count, while an external reference offers flexibility in reference voltage selection. |
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 | ADS1222IPWR | ADS1263IPW |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 32 |
| Sampling Rate(Per Second) | 240 | 38k |
| Number of Inputs | 2 | 5, 10 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-ADC | MUX-PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.7V ~ 5.25V |
| Features | Temperature Sensor | PGA, Temperature Sensor |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
Frequently asked questions
What are the primary functional differences between the ADS1263IPW and the ADS1222IPWR?
The ADS1263IPW is a 32-bit, 10-channel delta-sigma ADC with an integrated programmable gain amplifier (PGA) and a 24-bit auxiliary ADC, supporting data rates up to 38.4 kSPS. The ADS1222IPWR is a 24-bit, 2-channel delta-sigma ADC with a fixed gain of 1 to 128 and data rates up to 2 kSPS. The ADS1263 offers higher resolution, more input channels, and faster throughput, while the ADS1222 is a smaller, lower-power, 2-channel device.
Are the ADS1263IPW and ADS1222IPWR pin-to-pin or package compatible?
No. The ADS1263IPW is supplied in a 28-pin TSSOP (PW) package, while the ADS1222IPWR is supplied in a 16-pin TSSOP (PW) package. The pin counts, pin functions, and PCB land patterns differ, so they are not direct drop-in replacements.
How do the input channel counts and measurement configurations compare?
The ADS1263IPW provides 10 input channels (5 differential or 10 single-ended) plus a separate 24-bit auxiliary ADC, and includes an integrated PGA with gains from 1 to 32. The ADS1222IPWR provides 2 differential input channels with a fixed PGA gain of 1 to 128. The ADS1263 supports more complex multi-channel sensor systems, while the ADS1222 suits simple 2-channel bridge or thermocouple measurements.
How do the maximum data rates and noise performance compare?
The ADS1263IPW supports programmable data rates up to 38.4 kSPS with 32-bit resolution and low noise (approximately 7 nV/√Hz at gain 1). The ADS1222IPWR supports data rates up to 2 kSPS with 24-bit resolution. The ADS1263 delivers significantly higher throughput and resolution, while the ADS1222 is optimized for lower-speed, lower-power applications.
What are the supply voltage and power consumption differences?
The ADS1263IPW operates from an analog supply of 5 V (4.75 V to 5.25 V) and a digital supply of 2.7 V to 5.25 V, with typical power consumption around 25 mW in full operation. The ADS1222IPWR operates from a single 2.7 V to 5.5 V supply with typical power consumption around 1.2 mW. The ADS1222 is substantially lower power, while the ADS1263 requires a 5 V analog rail for its full performance.
Do both devices include an internal oscillator and reference?
The ADS1263IPW includes an internal oscillator and an internal 2.5 V reference, and also supports external reference inputs. The ADS1222IPWR includes an internal oscillator but requires an external reference voltage for ratiometric or absolute measurements. Designers using the ADS1222 must provide an external reference, whereas the ADS1263 can operate with its internal reference.
What are the typical target applications for each device?
The ADS1263IPW is intended for high-resolution, multi-channel precision measurement systems such as industrial process control, weigh scales, and analytical instrumentation. The ADS1222IPWR is intended for low-power, space-constrained sensor applications such as portable medical devices, temperature sensing, and battery-powered bridge sensors. Selection depends on channel count, resolution, speed, and power budget.
Can the ADS1222IPWR be used as a direct substitute for the ADS1263IPW in an existing design?
No. The devices differ in package pin count (16 vs 28 pins), channel count (2 vs 10 plus auxiliary), maximum data rate (2 kSPS vs 38.4 kSPS), resolution (24-bit vs 32-bit), supply requirements, and reference architecture. A direct substitution is not possible without redesigning the PCB, firmware, and measurement chain, and validating all performance parameters against the manufacturer datasheets.