Part A
ADS8422IBPFBR
Техасские инструменты
- Lifecycle
- Active
- Stock
- 1975 ПКС
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8422IBPFBR and ADS8401IBPFBR share a common TQFP-48 footprint and 16-bit SAR architecture, making the ADS8401IBPFBR a viable functional replacement candidate for the ADS8422IBPFBR in many designs. However, the ADS8422IBPFBR offers a higher sampling rate and a wider analog input range, so engineers should validate timing margins and input signal conditioning before committing to a drop-in substitution.
Package Type
High match
Resolution
High match
Sampling Rate
Validation required
Analog Input Range
Validation required
Parts at a glance
Part B
ADS8401IBPFBR
Техасские инструменты
- Lifecycle
- Active
- Stock
- 3689 ПКС
- Package
- TQFP-48
- Series
- Сбор данных - аналогово-цифровые преобразователи (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 | ADS8422IBPFBR | ADS8401IBPFBR | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit SAR ADCs, so resolution is identical and not a differentiator for substitutability. |
| Sampling Rate | 4 MSPS | 1.25 MSPS | The ADS8422 offers over 3x the throughput, which directly affects achievable signal bandwidth and system timing margin. |
| Number of Input Channels | 1 (single-ended) | 1 (single-ended) | Both are single-channel devices, so channel count does not constrain a drop-in replacement. |
| Input Type | Single-ended, unipolar | Single-ended, unipolar | Matching input configuration means the analog front-end can remain unchanged when swapping parts. |
| Supply Voltage (Analog) | 5 V | 5 V | Identical analog supply requirements allow the same power rail design to be reused. |
| Interface | Parallel (byte/word) | Parallel (byte/word) | A matching parallel interface simplifies FPGA/MCU glue logic reuse across both parts. |
| Package | 48-pin TQFP (PFB) | 48-pin TQFP (PFB) | Same package and pinout family supports a direct board-level swap without layout changes. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Equivalent industrial temperature ratings ensure both parts suit the same environmental conditions. |
| Power Consumption (Typical) | ~155 mW | ~110 mW | The higher-speed ADS8422 dissipates more power, which may affect thermal budgeting in dense designs. |
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 | ADS8422IBPFBR | ADS8401IBPFBR |
|---|---|---|
| Supplier | - | Texas Instruments |
| Series | microPOWER™ | microPOWER™ |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | - | 1.25M |
| Number of Inputs | 1 | 1 |
| Input Type | Differential | Differential |
| Data Interface | Parallel | Parallel |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | - | 1 |
| Architecture | SAR | SAR |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.95V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Base Product Number | ADS8422 | - |
| Sampling Rate (Per Second) | 4M | - |
| Number of A / D Converters | 1 | - |
| Mounting Type | Surface Mount | - |
| Packaging | Tape & Reel (TR) | - |
Frequently asked questions
What are the key differences between the ADS8422IBPFBR and ADS8401IBPFBR?
The ADS8422IBPFBR is a 16-bit, 4 MSPS fully differential pseudo-differential SAR ADC, while the ADS8401IBPFBR is a 16-bit, 1.25 MSPS fully differential SAR ADC. The ADS8422 offers a higher sampling rate (4 MSPS vs 1.25 MSPS) and includes a pseudo-differential input configuration, whereas the ADS8401 provides a lower speed with a fully differential input architecture. Both are 16-bit devices in 48-pin TQFP packages.
Are the ADS8422IBPFBR and ADS8401IBPFBR pin-compatible?
Both devices are offered in a 48-pin TQFP (PFB) package, but pin compatibility cannot be assumed solely from package type. Designers must verify pin functions and the PCB land pattern against the respective manufacturer datasheets before considering a direct replacement.
What is the maximum sampling rate of each device?
The ADS8422IBPFBR supports a maximum sampling rate of 4 MSPS, while the ADS8401IBPFBR supports a maximum sampling rate of 1.25 MSPS. The higher throughput of the ADS8422 makes it suitable for faster data acquisition applications.
What is the resolution and architecture of these ADCs?
Both the ADS8422IBPFBR and ADS8401IBPFBR are 16-bit successive-approximation-register (SAR) analog-to-digital converters. They share the same resolution but differ in maximum throughput and input configuration.
What input configuration does each ADC support?
The ADS8422IBPFBR features a pseudo-differential input configuration, while the ADS8401IBPFBR uses a fully differential input architecture. The choice affects signal conditioning, common-mode handling, and achievable noise performance in the target design.
What supply voltage and interface do these ADCs use?
Both devices operate from a 5 V analog supply and provide a parallel digital interface for output data. Designers should confirm the exact supply rails, reference requirements, and digital I/O levels in the respective manufacturer datasheets before finalizing the design.
Can the ADS8422IBPFBR directly replace the ADS8401IBPFBR in an existing design?
Direct replacement is not recommended without validation. Although both are 16-bit SAR ADCs in 48-pin TQFP packages, differences in maximum sampling rate, input configuration, and timing requirements mean the system must be re-evaluated against the ADS8422IBPFBR datasheet before substitution.