Part A
ADS1263IPW
德州儀器
- Lifecycle
- Active
- Stock
- 4618 件
- Package
- TSSOP-28
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Not a drop-in replacement
The ADS1263IPW and ADS1222IPWRG4 are not drop-in replacements for one another. The ADS1263IPW is a 32-bit, 10-channel precision ADC with an integrated PGA and reference, while the ADS1222IPWRG4 is a 24-bit, 2-channel ADC with a fixed-gain input buffer. They differ in resolution, channel count, package footprint, and input architecture, so a direct substitution is not feasible without a full redesign of the signal chain and board layout.
Different resolution
Different channel count
Different footprint
Different input architecture
Parts at a glance
Part B
ADS1222IPWRG4
德州儀器
- Lifecycle
- Active
- Stock
- 4722 件
- Package
- TSSOP-14
- 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 | ADS1222IPWRG4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 32 | 24 | Higher resolution enables detection of smaller signal changes, which is critical for precision measurement applications. |
| Number of ADC channels | 10 (5 differential / 10 single-ended) | 2 (2 differential / 2 single-ended) | More channels allow monitoring of multiple sensor inputs with a single device, reducing component count. |
| Maximum sample rate | 38.4 kSPS | 2 kSPS | Higher sampling rates support faster-changing signals and higher-bandwidth measurement requirements. |
| Interface type | SPI | SPI | Both use SPI, so the digital host interface is compatible, but firmware configuration differs. |
| Integrated PGA | Yes (gains 1 to 32) | Yes (gains 1 to 128) | A programmable gain amplifier allows direct amplification of small sensor signals, affecting sensitivity and input range. |
| Integrated features | PGA, reference, oscillator, sensor bias, GPIO, DAC | PGA, reference, oscillator | Additional integrated peripherals reduce external component count and board space in the design. |
| Supply voltage range | 2.7 V to 5.25 V (analog and digital) | 2.7 V to 5.5 V | Supply range determines compatibility with the system power rail and low-voltage operation. |
| Package | 28-pin TSSOP | 16-pin TSSOP | Different package footprints require PCB layout changes and affect board space. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +85 °C | Wider temperature range supports use in harsh or industrial environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1263IPW | ADS1222IPWRG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 32 | 24 |
| Sampling Rate(Per Second) | 38k | 240 |
| Number of Inputs | 5, 10 | 2 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-PGA-ADC | MUX-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal | External |
| Voltage - Supply, Analog | 5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.7V ~ 5.5V |
| Features | PGA, Temperature Sensor | Temperature Sensor |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
Frequently asked questions
What are the primary differences between the ADS1263IPW and ADS1222IPWRG4?
The ADS1263IPW is a 32-bit, 38-kSPS, 10-channel delta-sigma ADC with an integrated PGA and dual excitation current sources, housed in a 28-pin TSSOP. The ADS1222IPWRG4 is a 24-bit, 2-kSPS, 2-channel delta-sigma ADC with a fixed-gain PGA, supplied in a 16-pin TSSOP. The ADS1263 offers higher resolution, faster throughput, and more input channels, while the ADS1222 provides a smaller footprint and lower power consumption for compact, low-speed sensing applications.
Are the ADS1263IPW and ADS1222IPWRG4 pin-to-pin compatible?
No. The ADS1263IPW uses a 28-pin TSSOP package, whereas the ADS1222IPWRG4 uses a 16-pin TSSOP package. The pin counts, pin functions, and PCB land patterns differ, so they cannot be interchanged without a board redesign.
Which device offers a higher maximum sample rate?
The ADS1263IPW supports data rates up to 38 kSPS, while the ADS1222IPWRG4 supports up to 2 kSPS. The ADS1263 is therefore better suited for higher-speed measurement applications.
How do the input channel counts compare between the two ADCs?
The ADS1263IPW provides 10 input channels (5 differential or 10 single-ended), while the ADS1222IPWRG4 provides 2 differential input channels. The ADS1263 accommodates more sensor inputs per device.
Do both devices include a programmable gain amplifier (PGA)?
Yes. The ADS1263IPW integrates a PGA with selectable gains of 1 to 32, and the ADS1222IPWRG4 includes a PGA with fixed gain options of 1, 2, 4, 8, 16, 32, 64, and 128. Both support direct interfacing to low-level sensors such as thermocouples and bridge transducers.
Which ADC is more suitable for low-power, space-constrained designs?
The ADS1222IPWRG4 is more suitable for low-power and space-constrained designs. It is offered in a smaller 16-pin TSSOP package and operates at lower data rates, which typically corresponds to lower power consumption compared with the higher-speed, multi-channel ADS1263IPW.
What are the supply voltage requirements for each device?
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. The ADS1222IPWRG4 operates from a single supply of 2.7 V to 5.5 V. Designers should verify exact supply ranges against the respective manufacturer datasheets for their target operating conditions.
Can the ADS1222IPWRG4 be used as a drop-in replacement for the ADS1263IPW in an existing design?
No. The two devices differ in package size, pin count, channel count, resolution, and maximum data rate. A drop-in replacement is not possible; any substitution requires a PCB redesign and full validation against the system's accuracy, speed, and power requirements.