Part A
ADS1256IDBT
Texas Instruments
- Lifecycle
- Active
- Stock
- 4833 PCS
- Package
- SSOP-28
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1256IDBT and ADS1282HIPW are not drop-in replacements for one another. Although both are 24-bit delta-sigma ADCs, they differ fundamentally in resolution architecture, input channel configuration, package footprint, and target application domain, so substituting one for the other requires full electrical and mechanical redesign validation.
Different channel count
Different package footprint
Different data rate capability
Different input architecture
Parts at a glance
Part B
ADS1282HIPW
Texas Instruments
- Lifecycle
- Active
- Stock
- 6044 PCS
- Package
- TSSOP-28
- Series
- Data Acquisition - 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 | ADS1256IDBT | ADS1282HIPW | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 31 | Higher resolution enables finer measurement of small signal changes, which is critical for precision seismic and high-dynamic-range applications. |
| Number of input channels | 8 (single-ended) / 4 (differential) | 2 (differential) | Channel count determines how many sensors can be multiplexed into one ADC, affecting system architecture and board space. |
| Maximum sample rate | 30 kSPS | 4 kSPS | Sample rate sets the bandwidth of signals that can be captured; a faster ADC supports higher-frequency inputs and faster scanning of multiple channels. |
| Interface type | SPI | SPI | Both use SPI, so the digital host interface is compatible, but firmware timing and register maps still differ between the two devices. |
| Supply voltage (analog) | 5 V (single 5 V analog supply) | 5 V (analog) with separate digital supply | Analog supply range affects input signal swing and reference requirements; matching supplies simplifies power-rail reuse in a redesign. |
| Input type / PGA | PGA with gains 1 to 64 | PGA with gains 1 to 64 | Programmable gain allows small sensor signals to be amplified before conversion; similar gain ranges ease migration between the parts. |
| Package | TSSOP-28 | TSSOP-28 | Package footprint and pin count affect PCB layout compatibility; identical packages can simplify board rework but pinouts must still be verified. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range determines suitability for industrial and outdoor environments; matching ranges support similar application coverage. |
| Typical application focus | General-purpose precision measurement, industrial, instrumentation | Seismic and energy exploration, high-resolution sensor digitization | Application focus indicates the noise, linearity, and filtering trade-offs optimized in each part, which affects functional substitutability. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1256IDBT | ADS1282HIPW |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 24 | - |
| Sampling Rate(Per Second) | 30k | - |
| Number of Inputs | 4, 8 | - |
| Input Type | Differential, Single Ended | - |
| Data Interface | SPI | - |
| Configuration | MUX-PGA-ADC | - |
| Number of A/D Converters | 1 | - |
| Architecture | Sigma-Delta | - |
| Reference Type | External | - |
| Voltage - Supply, Analog | 5V | - |
| Voltage - Supply, Digital | 1.8V ~ 3.6V | - |
| Features | PGA | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
What are the primary differences between the ADS1256IDBT and ADS1282HIPW?
The ADS1256IDBT is a 24-bit, 8-channel delta-sigma ADC with a maximum data rate of 30 kSPS, housed in a TSSOP-28 package. The ADS1282HIPW is a 31-bit, 2-channel delta-sigma ADC designed for seismic and high-resolution measurement applications, offering a maximum data rate of 4 kSPS and housed in a TSSOP-28 package. The ADS1282HIPW provides higher resolution and lower noise, while the ADS1256IDBT offers more input channels and a higher sampling rate.
Are the ADS1256IDBT and ADS1282HIPW pin-compatible?
No. Although both devices are offered in a TSSOP-28 package, their pin functions and internal architectures differ. The ADS1256IDBT provides eight single-ended or four differential inputs with a multiplexer, while the ADS1282HIPW provides two differential inputs with integrated PGA and different digital interface pin assignments. They are not direct pin-for-pin replacements.
Which device offers higher resolution and lower noise for precision measurement?
The ADS1282HIPW offers higher resolution at 31 bits and is specified with very low noise, making it suitable for high-resolution seismic and precision measurement applications. The ADS1256IDBT provides 24-bit resolution with noise performance suitable for general-purpose multi-channel data acquisition. For the lowest noise and highest resolution, the ADS1282HIPW is the appropriate choice.
What are the maximum data rates of the ADS1256IDBT and ADS1282HIPW?
The ADS1256IDBT supports a maximum data rate of 30 kSPS. The ADS1282HIPW supports a maximum data rate of 4 kSPS. The ADS1256IDBT is therefore better suited for applications requiring higher throughput, while the ADS1282HIPW prioritizes resolution and noise performance over speed.
How many input channels does each device support?
The ADS1256IDBT provides 8 single-ended or 4 differential input channels through an integrated input multiplexer. The ADS1282HIPW provides 2 differential input channels. The ADS1256IDBT is preferable for multi-channel acquisition, while the ADS1282HIPW targets dual-channel high-resolution measurement.
Do both devices support the same digital interface?
Both devices use an SPI-compatible serial interface for communication with a host controller. However, the register maps, command sets, and configuration details differ between the ADS1256IDBT and ADS1282HIPW. Firmware and driver software must be adapted accordingly when migrating between the two devices.
What are the typical target applications for each device?
The ADS1256IDBT is typically used in multi-channel data acquisition systems, industrial process control, instrumentation, and sensor measurement applications requiring up to 30 kSPS. The ADS1282HIPW is designed for high-resolution seismic data acquisition, energy exploration, and precision measurement applications where low noise and 31-bit resolution are critical.
Can the ADS1256IDBT be used as a drop-in replacement for the ADS1282HIPW?
No. Despite sharing a TSSOP-28 package, the two devices differ in resolution, channel count, data rate, pin functions, register maps, and noise performance. A direct drop-in replacement is not possible; any substitution requires a full schematic, layout, and firmware review against the respective manufacturer datasheets.