Part A
ADS1263IPW
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 4618 個数
- Package
- TSSOP-28
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1263IPW and ADS1271IPWRG4 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, while the ADS1271IPWRG4 is a 24-bit, single-channel wide-bandwidth ADC. They differ in resolution, channel count, package footprint, and digital interface, so a direct substitution is not feasible without a full redesign of the signal chain and board layout.
Different resolution
Different channel count
Different package footprint
Different digital interface
Parts at a glance
Part B
ADS1271IPWRG4
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 3837 個数
- Package
- TSSOP-16
- Series
- データ取得 - アナログ/デジタルコンバータ (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 | ADS1271IPWRG4 | 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 Input Channels | 10 (5 differential / 10 single-ended) | 1 (1 differential) | More channels allow multiplexing of multiple sensors without external switching hardware, affecting system complexity and cost. |
| Maximum Sampling Rate | 38.4 kSPS | 105 kSPS | Sampling rate determines the maximum signal bandwidth that can be captured, impacting suitability for high-speed vs. high-precision applications. |
| Interface Type | SPI | SPI | Both use SPI, so the digital host interface is compatible, but firmware configuration differs due to register maps. |
| Integrated PGA | Yes (gain 1 to 32) | No | An integrated PGA allows direct connection of low-level sensors without external amplification, simplifying the signal chain. |
| Integrated Features | PGA, reference, oscillator, sensor bias, GPIO, DAC | Delta-sigma modulator only | Higher integration reduces external component count and board space, affecting overall system cost and design effort. |
| Supply Voltage (Analog) | 5 V (analog), 2.7 V to 5.25 V (digital) | 5 V (analog), 1.8 V to 3.3 V (digital) | Supply requirements determine compatibility with the host logic level and available power rails in the system. |
| Package | 28-pin TSSOP | 16-pin TSSOP | Different package footprints and pin counts prevent direct drop-in replacement on an existing PCB layout. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +105°C | The temperature range affects reliability in harsh environments and margin for industrial or automotive 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 | ADS1263IPW | ADS1271IPWRG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 32 | 24 |
| Sampling Rate(Per Second) | 38k | 105k |
| Number of Inputs | 5, 10 | 1 |
| Input Type | Differential, Single Ended | Differential |
| Data Interface | SPI | SPI |
| Configuration | MUX-PGA-ADC | ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal | External |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 1.65V ~ 3.6V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 105°C |
| Features | PGA, Temperature Sensor | - |
Frequently asked questions
What are the primary architectural differences between the ADS1263IPW and ADS1271IPWRG4?
The ADS1263IPW is a 32-bit, 10-channel delta-sigma ADC with an integrated programmable gain amplifier (PGA) and a 24-bit auxiliary ADC, housed in a TSSOP-28 package. The ADS1271IPWRG4 is a 24-bit, single-channel delta-sigma ADC with a fixed gain of 1, offered in a TSSOP-16 package. The ADS1263 integrates more signal conditioning and multiplexing, while the ADS1271 is a simpler, single-channel converter.
Do the ADS1263IPW and ADS1271IPWRG4 have the same pin count and package footprint?
No. The ADS1263IPW is supplied in a 28-pin TSSOP (PW) package, whereas the ADS1271IPWRG4 is supplied in a 16-pin TSSOP (PW) package. The two devices are not pin-compatible and require different PCB land patterns.
What are the maximum sample rates of the ADS1263IPW and ADS1271IPWRG4?
The ADS1263IPW supports data rates up to 38.4 kSPS in its primary ADC. The ADS1271IPWRG4 supports data rates up to 105 kSPS. The ADS1271 therefore offers a higher maximum throughput, while the ADS1263 provides higher resolution and more input channels.
How do the input channel configurations of the ADS1263IPW and ADS1271IPWRG4 compare?
The ADS1263IPW provides 10 single-ended or 5 differential inputs on its main ADC, plus additional inputs on its auxiliary ADC. The ADS1271IPWRG4 provides a single differential input channel. The ADS1263 is suited to multi-channel measurement systems, while the ADS1271 targets single-channel high-speed acquisition.
Do both devices include an integrated programmable gain amplifier (PGA)?
The ADS1263IPW includes an integrated PGA with selectable gains on its main ADC. The ADS1271IPWRG4 does not include an integrated PGA; it has a fixed gain of 1. External signal conditioning is required if gain is needed with the ADS1271.
What are the supply voltage requirements for the ADS1263IPW and ADS1271IPWRG4?
The ADS1263IPW operates from an analog supply of 5 V (with a bipolar analog supply option) and a digital supply of 2.7 V to 5.25 V. The ADS1271IPWRG4 operates from a 5 V analog supply and a 1.8 V to 3.3 V digital (IOVDD) supply. Designers should confirm exact supply ranges against the respective manufacturer datasheets.
Can the ADS1263IPW and ADS1271IPWRG4 be used interchangeably in an existing design?
No. The devices differ in package pin count, channel count, PGA availability, maximum sample rate, and digital interface timing. A direct substitution is not possible; any replacement requires a full schematic, layout, and firmware review against the manufacturer datasheets.