Part A
ADS7953QDBTRQ1
Национальный полупроводник
- Lifecycle
- Active
- Stock
- 1543 ПКС
- Package
- TSSOP-38
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7953QDBTRQ1 is a functionally compatible alternative to the ADS7953SBDBTR, sharing the same 12-bit SAR architecture, 16-channel multiplexer, and TSSOP-38 footprint. The primary distinction is qualification grade: the Q1 variant is AEC-Q100 qualified for automotive use, while the S variant targets industrial applications. Designers should confirm the target application's qualification requirements and verify timing and reference specifications against the system budget before substituting.
Resolution and Architecture
High match
Channel Count and Input Configuration
High match
Package and Pinout
High match
Qualification Grade
Validation required
Parts at a glance
Part B
ADS7953SBDBTR
Техасские инструменты
- Lifecycle
- Active
- Stock
- 6896 ПКС
- Package
- TSSOP-38
- 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 | ADS7953SBDBTR | ADS7953QDBTRQ1 | Why it matters |
|---|---|---|---|
| Automotive Qualification | Not AEC-Q100 qualified | AEC-Q100 qualified (Grade 1) | The Q1 variant is qualified for automotive use, which is essential for automotive and other high-reliability applications requiring AEC-Q100 compliance. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C (Grade 1 automotive) | Both cover the industrial/automotive range, but the Q1 part is specified and qualified to automotive Grade 1 standards, affecting reliability guarantees. |
| Resolution | 12 bit | 12 bit | Resolution determines the smallest measurable analog step; identical resolution means equivalent measurement precision. |
| Number of Input Channels | 16 single-ended | 16 single-ended | Channel count defines how many analog signals can be multiplexed into the ADC; matching counts ensures functional interchangeability. |
| Sampling Rate | 1 MSPS | 1 MSPS | Maximum throughput affects how fast signals can be digitized; identical rates preserve timing performance in the target system. |
| Supply Voltage | 2.7 V to 5.25 V (analog and digital) | 2.7 V to 5.25 V (analog and digital) | Supply range determines compatibility with the system power rails; matching ranges allow drop-in substitution. |
| Interface | SPI (serial) | SPI (serial) | The digital interface must match the host controller; identical SPI interface ensures firmware and hardware compatibility. |
| Package | TSSOP-38 (DBT) | TSSOP-38 (DBT) | Package footprint and pinout must match for PCB compatibility; identical packages allow the same board layout. |
| Input Type | Single-ended (pseudo-differential) | Single-ended (pseudo-differential) | Input configuration affects how signals are connected; matching input types ensures the same sensor/signal wiring can be used. |
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 | ADS7953QDBTRQ1 | ADS7953SBDBTR |
|---|---|---|
| Series | Automotive, AEC-Q100 | microPOWER™ |
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 1M | 1M |
| Number of Inputs | 16 | 16 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-PGA-S/H-ADC | MUX-S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Voltage - Supply, Digital | 1.7V ~ 5.25V | 2.7V ~ 5.25V |
| Features | PGA | - |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What are the key differences between the ADS7953SBDBTR and the ADS7953QDBTRQ1?
The primary difference is qualification and grade. The ADS7953SBDBTR is the standard industrial-grade version in a TSSOP-38 (DBT) package, while the ADS7953QDBTRQ1 is the automotive-qualified AEC-Q100 Grade 1 version in the same TSSOP-38 package. Both are 12-bit, 16-channel, 1-MSPS SAR ADCs with an SPI interface and are functionally equivalent in core conversion performance.
Are the ADS7953SBDBTR and ADS7953QDBTRQ1 pin-compatible?
Yes. Both devices are offered in the same 38-pin TSSOP (DBT) package with identical pin functions, so they are pin-compatible and share the same PCB land pattern.
What is the resolution and sampling rate of these ADCs?
Both the ADS7953SBDBTR and ADS7953QDBTRQ1 are 12-bit successive-approximation register (SAR) ADCs with 16 single-ended input channels and a maximum throughput of 1 MSPS.
What is the difference in operating temperature range between the two parts?
The ADS7953SBDBTR is specified for the industrial temperature range of -40°C to +125°C. The ADS7953QDBTRQ1 is specified for the automotive AEC-Q100 Grade 1 temperature range of -40°C to +125°C, with qualification testing performed to AEC-Q100 requirements.
Does the ADS7953QDBTRQ1 carry automotive qualification that the ADS7953SBDBTR does not?
Yes. The ADS7953QDBTRQ1 is AEC-Q100 qualified (Q1 suffix) for automotive applications, whereas the ADS7953SBDBTR is the standard industrial-grade device without AEC-Q100 qualification.
What supply voltage and interface do these devices use?
Both devices operate from a single analog supply of 2.7 V to 5.25 V and a digital supply of 1.7 V to 5.25 V, and they communicate over a SPI-compatible serial interface.
Can the ADS7953SBDBTR be used as a drop-in replacement for the ADS7953QDBTRQ1 in an automotive design?
Functionally and pin-wise they are compatible, but for automotive production the AEC-Q100-qualified ADS7953QDBTRQ1 should be used to meet qualification and reliability requirements. Substitution in the reverse direction (using the industrial part in an automotive application) is not recommended where AEC-Q100 compliance is required.