Part A
ADS1220IPW
德州儀器
- Lifecycle
- Active
- Stock
- 4062 件
- Package
- TSSOP-16
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS1263IPW and ADS1220IPW share the same TSSOP-28 package and pin-compatible footprint, making them viable candidates for the same board location. However, the ADS1263IPW offers a higher-resolution 32-bit ADC with an integrated PGA and auxiliary 24-bit ADC, while the ADS1220IPW is a 24-bit ADC with a lower channel count and reduced feature set. Designers must validate supply voltage, reference configuration, and firmware register mapping before substituting, as the two devices are not register-compatible despite their physical similarity.
Package Type
High match
Resolution and Data Rate
Validation required
Input Channel Count
Validation required
Register and Interface Compatibility
Not compatible
Parts at a glance
Part B
ADS1263IPW
德州儀器
- Lifecycle
- Active
- Stock
- 4618 件
- Package
- TSSOP-28
- Series
- 資料獲取-模數轉換器（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 | ADS1220IPW | Why it matters |
|---|---|---|---|
| Resolution (bits) | 32 | 24 | Higher resolution enables detection of smaller signal changes, which is critical for precision measurement and low-level sensor applications. |
| Number of input channels (differential) | 5 | 2 | More differential channels allow the device to interface with more sensors simultaneously without external multiplexing. |
| Maximum sample rate (SPS) | 38400 | 2000 | A higher sample rate supports faster-changing signals and higher-bandwidth measurement applications. |
| Integrated PGA gain range | 1 to 32 | 1 to 128 | The PGA gain range determines the smallest input signal that can be amplified to full scale, affecting sensitivity to low-level sensors. |
| Integrated features | ADC with PGA, reference, oscillator, and auxiliary 24-bit ADC | ADC with PGA, reference, and oscillator | Additional integrated blocks such as an auxiliary ADC reduce external component count and board space in system designs. |
| Supply voltage range (AVDD) | 4.75 V to 5.25 V | 2.7 V to 5.5 V | A wider supply range offers greater flexibility for low-voltage and battery-powered systems. |
| Interface | SPI | SPI | Both use SPI, so the digital host interface is compatible, but the command set and register map differ between the two devices. |
| Package | TSSOP-28 | TSSOP-16 | Different package footprints affect PCB layout and may require board redesign when substituting one part for the other. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings mean both parts are suitable for the same industrial and harsh-environment applications. |
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 | ADS1220IPW | ADS1263IPW |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 32 |
| Sampling Rate(Per Second) | 2k | 38k |
| Number of Inputs | 2, 4 | 5, 10 |
| 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, Internal, Supply | External, Internal |
| Voltage - Supply, Analog | 2.3V ~ 5.5V, ±2.5 | 5V |
| Voltage - Supply, Digital | 2.3V ~ 5.5V | 2.7V ~ 5.25V |
| Features | PGA, Temperature Sensor | PGA, Temperature Sensor |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What are the primary differences between the ADS1263IPW and ADS1220IPW?
The ADS1263IPW is a 32-bit, 10-channel delta-sigma ADC with an integrated PGA and dual excitation current sources, featuring a maximum data rate of 38.4 kSPS and typical 24-bit noise-free resolution. The ADS1220IPW is a 24-bit, 4-channel delta-sigma ADC with an integrated PGA, offering up to 2 kSPS in normal mode and 20 SPS in turbo mode. The ADS1263 provides higher resolution, more input channels, and faster throughput, while the ADS1220 is a smaller, lower-power solution for compact sensor measurement designs.
Are the ADS1263IPW and ADS1220IPW pin-compatible?
No. Both devices are offered in TSSOP packages, but the ADS1263IPW uses a 28-pin TSSOP while the ADS1220IPW uses a 16-pin TSSOP. Pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements for each other.
Which device offers higher resolution and lower noise for precision sensor measurements?
The ADS1263IPW provides 32-bit resolution and achieves approximately 24-bit noise-free resolution at lower data rates, making it better suited for high-precision measurements such as weigh scales and strain gauges. The ADS1220IPW provides 24-bit resolution and is optimized for low-power, space-constrained sensor applications where 24-bit resolution is sufficient.
How do the input channel counts compare between the ADS1263IPW and ADS1220IPW?
The ADS1263IPW supports 10 input channels (5 differential or 10 single-ended inputs) plus an internal multiplexer for system monitoring. The ADS1220IPW supports 4 input channels (2 differential or 4 single-ended inputs). Designs requiring more sensor inputs should select the ADS1263IPW.
What are the maximum data rates of the ADS1263IPW and ADS1220IPW?
The ADS1263IPW supports data rates up to 38.4 kSPS. The ADS1220IPW supports up to 2 kSPS in normal mode and 20 SPS in turbo mode. The ADS1263IPW is preferable for applications requiring higher throughput, while the ADS1220IPW targets low-speed, low-power sensing.
Do both devices include an integrated PGA and excitation current sources?
Both the ADS1263IPW and ADS1220IPW include an integrated programmable gain amplifier (PGA). The ADS1263IPW additionally integrates dual excitation current sources for direct RTD and thermistor excitation, whereas the ADS1220IPW does not include internal excitation current sources and requires external excitation circuitry for resistive sensor measurements.
How do the power consumption characteristics of the ADS1263IPW and ADS1220IPW compare?
The ADS1220IPW is designed for low-power operation, with typical supply current in the hundreds of microamperes range depending on data rate and PGA settings, making it suitable for battery-powered designs. The ADS1263IPW consumes more power due to its higher channel count, faster throughput, and additional integrated functions, so it is typically selected for mains-powered or higher-performance precision systems rather than ultra-low-power applications.
Which device is more suitable for RTD or thermocouple measurement systems?
The ADS1263IPW is better suited for RTD measurements because it integrates dual excitation current sources and supports ratiometric measurement configurations. For thermocouple measurements, both devices can be used with an external cold-junction compensation sensor, but the ADS1263IPW offers more input channels and higher resolution for multi-sensor precision temperature systems. The ADS1220IPW remains suitable for compact, low-power thermocouple designs where fewer channels are required.