Part A
ADS1271IBPWR
Техасские инструменты
- Lifecycle
- Active
- Stock
- 6728 ПКС
- Package
- TSSOP-16
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1241E and ADS1271IBPWR are not functionally interchangeable: they differ in resolution and architecture, sample rate, package and pinout, and analog supply range, so the ADS1271IBPWR cannot be substituted for the ADS1241E without a full redesign and revalidation.
Different resolution and architecture
Different sample rate
Different package and pinout
Different analog supply range
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS1241E | ADS1271IBPWR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit delta-sigma ADCs, so resolution alone does not distinguish them for substitutability. |
| Number of input channels | 8 (single-ended) / 4 (differential) | 1 (differential) | The ADS1241E supports multi-channel multiplexed inputs, while the ADS1271 is a single-channel device, limiting direct substitution in multi-sensor systems. |
| Maximum sample rate (SPS) | 15 | 105000 | The ADS1271 offers vastly higher throughput, making it suitable for high-speed acquisition where the ADS1241E would be too slow. |
| Interface type | SPI (serial) | SPI (serial) | Both use a serial SPI-compatible interface, easing digital-side integration, though timing and register maps differ. |
| Supply voltage (analog) | 2.7 V to 5.25 V | 4.75 V to 5.25 V | The ADS1241E operates over a wider low-voltage range, while the ADS1271 requires a nominal 5 V analog supply. |
| Package | SSOP-28 | TSSOP-16 | Different package footprints and pin counts prevent drop-in board replacement without layout changes. |
| Input type | Differential / single-ended (multiplexed) | Differential | The ADS1241E can be configured for single-ended measurements, whereas the ADS1271 is fixed differential, affecting sensor interfacing options. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +105 °C | The ADS1271 supports a wider industrial temperature range, which may be required in harsher environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1271IBPWR | ADS1241E |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 105k | 15 |
| Number of Inputs | 1 | 8 |
| Input Type | Differential | Differential, Single Ended |
| Data Interface | SPI | SPI |
| Configuration | ADC | MUX-PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External |
| Voltage - Supply, Analog | 5V | 2.7V ~ 3.3V, 5V |
| Voltage - Supply, Digital | 1.65V ~ 3.6V | 2.7V ~ 5.25V |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 85°C |
| Features | - | PGA |
Frequently asked questions
What are the primary architectural differences between the ADS1241E and ADS1271IBPWR?
The ADS1241E is a 24-bit delta-sigma analog-to-digital converter with a programmable gain amplifier (PGA) and a multiplexer, designed for low-speed, high-resolution sensor measurement. The ADS1271IBPWR is a 24-bit delta-sigma ADC with a fixed gain and no input multiplexer, designed for high-speed, wide-bandwidth signal acquisition with data rates up to 105 kSPS.
How do the maximum data rates of the ADS1241E and ADS1271IBPWR compare?
The ADS1241E supports programmable output data rates up to 1 kSPS, making it suitable for slow-moving sensor signals. The ADS1271IBPWR supports data rates up to 105 kSPS in high-speed mode, enabling acquisition of wider-bandwidth signals.
Do the ADS1241E and ADS1271IBPWR have integrated input multiplexers?
The ADS1241E includes an input multiplexer that allows selection among multiple differential input channels, which is useful for multi-sensor systems. The ADS1271IBPWR does not include an input multiplexer and provides a single differential input channel.
What are the package and pin count differences between the ADS1241E and ADS1271IBPWR?
The ADS1241E is offered in a 28-pin SSOP package. The ADS1271IBPWR is offered in a 16-pin TSSOP package. The different pin counts and footprints mean the two devices are not pin-compatible and cannot be dropped into the same PCB land pattern.
How do the supply voltage requirements of the ADS1241E and ADS1271IBPWR differ?
The ADS1241E operates from a single analog supply of 2.7 V to 5.25 V and a digital supply of 2.7 V to 5.25 V. The ADS1271IBPWR operates from an analog supply of 4.75 V to 5.25 V and a digital supply of 1.65 V to 3.6 V, so the two devices are not interchangeable in terms of supply rails.
Which device is better suited for multi-channel sensor measurement and which for high-speed signal acquisition?
The ADS1241E, with its integrated PGA and input multiplexer, is better suited for multi-channel low-frequency sensor measurement such as temperature, pressure, or strain gauges. The ADS1271IBPWR, with its higher data rate and wider signal bandwidth, is better suited for high-speed signal acquisition such as vibration, audio-band, or industrial control feedback signals.
Can the ADS1241E and ADS1271IBPWR be used as direct substitutes for each other?
No. The two devices differ in package, pin count, supply voltage requirements, input architecture, and maximum data rate. A direct substitution is not possible without redesigning the PCB and validating the signal chain against the target application requirements.