Part A
ADS1271IBPW
Texas Instruments
- Lifecycle
- Active
- Stock
- 2069 Stückzahl
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1263IPW and ADS1271IBPW are not drop-in replacements for one another. Although both are 24-bit delta-sigma ADCs in a TSSOP-28 package, they differ fundamentally in architecture, channel count, interface, and feature set. The ADS1263IPW is a 10-channel precision sensor ADC with an integrated PGA and dual excitation current sources, while the ADS1271IBPW is a single-channel wide-bandwidth ADC with a fixed-gain modulator and no integrated PGA. Designers must re-validate the analog front end, digital interface, and system timing before considering any substitution.
Different channel count
Different interface type
Different analog front end
Different feature set
Parts at a glance
Part B
ADS1263IPW
Texas Instruments
- Lifecycle
- Active
- Stock
- 4618 Stückzahl
- Package
- TSSOP-28
- Series
- Datenerfassung mit 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 | ADS1263IPW | ADS1271IBPW | 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) | 1 (1 differential) | More channels allow a single device to monitor multiple sensor inputs, reducing component count and board space. |
| Maximum sample rate | 38.4 kSPS | 105 kSPS | Sample rate determines the maximum signal bandwidth the ADC can capture, affecting suitability for dynamic or high-frequency signals. |
| Interface type | SPI | SPI | The digital interface must match the host microcontroller to ensure reliable communication and ease of integration. |
| Integrated PGA | Yes | No | An integrated programmable gain amplifier allows direct connection of low-level sensors without external signal conditioning. |
| Integrated voltage reference | Yes | No | An on-chip reference simplifies design and improves accuracy by eliminating an external reference component. |
| Supply voltage (analog) | 5 V (single) / ±2.5 V (bipolar) | 5 V (single) | Supply requirements affect system power design and whether bipolar input signals can be accommodated directly. |
| Package | TSSOP-28 | TSSOP-16 | Package footprint and pin count determine PCB layout compatibility and whether a drop-in replacement is possible. |
| Operating temperature range | -40 °C to +125 °C | -40 °C to +105 °C | The temperature range must cover the application environment to guarantee specified performance and reliability. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1271IBPW | ADS1263IPW |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | ADS1271 | - |
| Number of Bits | 24 | 32 |
| Sampling Rate (Per Second) | 105k | - |
| Number of Inputs | 1 | 5, 10 |
| Input Type | Differential | Differential, Single Ended |
| Data Interface | SPI | SPI |
| Configuration | ADC | MUX-PGA-ADC |
| Number of A / D Converters | 1 | - |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External, Internal |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 1.65V ~ 3.6V | 2.7V ~ 5.25V |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
| Sampling Rate(Per Second) | - | 38k |
| Number of A/D Converters | - | 1 |
| Features | - | PGA, Temperature Sensor |
Frequently asked questions
What are the primary functional differences between the ADS1263IPW and ADS1271IBPW?
The ADS1263IPW is a 32-bit, 10-channel delta-sigma ADC with an integrated PGA, dual excitation current sources, and a 24-bit auxiliary ADC, designed for high-precision sensor measurement. The ADS1271IBPW is a single-channel, 24-bit delta-sigma ADC with a fixed gain of 1, optimized for wide-bandwidth industrial measurement with data rates up to 105 kSPS. The ADS1263 integrates more analog front-end features, while the ADS1271 focuses on high-speed, single-channel conversion.
Do the ADS1263IPW and ADS1271IBPW share the same package and pinout?
No. The ADS1263IPW is supplied in a 28-pin TSSOP (PW) package, while the ADS1271IBPW is supplied in a 24-pin TSSOP (PW) package. The pin counts and pin functions differ, so they are not pin-compatible and cannot be dropped into the same PCB land pattern without redesign.
How do the maximum data rates of the ADS1263IPW and ADS1271IBPW compare?
The ADS1263IPW supports programmable data rates up to 38.4 kSPS in its main ADC path. The ADS1271IBPW supports data rates up to 105 kSPS in High-Speed mode, with lower rates available in High-Resolution and Low-Power modes. The ADS1271 therefore offers a higher maximum throughput for wide-bandwidth signal acquisition.
Which device offers better resolution for low-frequency precision measurements?
The ADS1263IPW provides up to 32-bit resolution on its main ADC and includes a low-noise PGA, making it suited to low-frequency, high-precision sensor measurements. The ADS1271IBPW provides 24-bit resolution. For applications requiring the highest bit depth and integrated front-end features at low input frequencies, the ADS1263IPW is the higher-resolution option.
Do both devices include an integrated programmable gain amplifier (PGA)?
No. The ADS1263IPW includes an integrated PGA with selectable gains, allowing direct connection of low-level sensor signals. The ADS1271IBPW does not include a PGA; it provides a fixed gain of 1, so external signal conditioning is required for low-amplitude inputs.
What are the supply voltage requirements for the ADS1263IPW and ADS1271IBPW?
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 ADS1271IBPW operates from a 5 V analog supply and a 1.8 V to 3.3 V digital (IOVDD) supply. Both require careful supply sequencing and decoupling per their respective datasheets.
Can the ADS1271IBPW be used as a direct replacement for the ADS1263IPW in an existing design?
No. The devices differ in package pin count, pin functions, channel count, PGA availability, and maximum data rate. A direct replacement is not possible; any substitution requires a PCB redesign and revalidation of the analog front end, timing, and firmware against the target device datasheet.