Part A
ADS7952QDBTRQ1
Техасские инструменты
- Lifecycle
- Active
- Stock
- 6054 ПКС
- Package
- TSSOP-38
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7952QDBTRQ1 is a viable functional replacement candidate for the ADS7953SBDBTR in many designs, sharing the same TSSOP-38 footprint, 12-bit SAR architecture, and SPI interface, though the reduced channel count and automotive qualification must be validated against the target application requirements.
Channel Count
Validation required
Package Type
High match
Resolution and Interface
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 | ADS7952QDBTRQ1 | Why it matters |
|---|---|---|---|
| Number of Input Channels | 16 | 12 | Channel count determines how many analog signals can be multiplexed into the ADC; a 16-channel device cannot be directly substituted where 12 channels are required without leaving inputs unused, and vice versa. |
| Resolution | 12 bit | 12 bit | Resolution sets the smallest measurable analog step; matching 12-bit resolution preserves measurement precision and quantization behavior in the target system. |
| Sampling Rate | 1 MSPS | 1 MSPS | Maximum throughput must meet the signal bandwidth and timing requirements of the application; identical 1 MSPS rates allow equivalent acquisition timing. |
| Supply Voltage (Analog and Digital) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Operating supply range must match the system rail; identical ranges ensure the device can be powered from the same supply without level shifting. |
| Interface Type | SPI | SPI | The digital interface must be compatible with the host controller; a shared SPI interface allows reuse of existing firmware and bus wiring. |
| Input Type | Single-ended | Single-ended | Single-ended inputs define how signals are referenced to ground; matching input topology ensures the sensor front-end remains compatible. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | The temperature range must cover the application environment; the automotive-qualified variant is specified over the same extended range for harsh conditions. |
| Qualification / Grade | Industrial | Automotive (AEC-Q100) | Automotive qualification implies stricter reliability and quality screening; substituting an industrial-grade part into an automotive application may violate qualification requirements. |
| Package | TSSOP-38 | TSSOP-38 | Package footprint and pinout must match for board-level drop-in compatibility; identical TSSOP-38 packages allow the same PCB land pattern. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7952QDBTRQ1 | ADS7953SBDBTR |
|---|---|---|
| Series | Automotive, AEC-Q100 | microPOWER™ |
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 1M | 1M |
| Number of Inputs | 12 | 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 ADS7952QDBTRQ1?
The ADS7953SBDBTR is a 12-bit, 16-channel successive-approximation register (SAR) analog-to-digital converter (ADC) in a TSSOP-38 package, specified for the industrial temperature range of -40°C to +125°C. The ADS7952QDBTRQ1 is a 12-bit, 12-channel SAR ADC in the same TSSOP-38 package, but it is qualified to AEC-Q100 Grade 1 for automotive applications. The primary differences are channel count (16 vs. 12) and qualification grade (industrial vs. automotive AEC-Q100).
Are the ADS7953SBDBTR and ADS7952QDBTRQ1 pin-compatible?
Both devices are offered in the same 38-pin TSSOP (DBT) package, but they are not functionally pin-compatible because the ADS7953 provides 16 analog input channels while the ADS7952 provides 12. Pin assignments for the analog inputs and associated control signals differ, so a direct drop-in replacement is not possible without verifying the pinout against the respective datasheets.
What is the resolution and sampling rate of these ADCs?
Both the ADS7953SBDBTR and ADS7952QDBTRQ1 are 12-bit SAR ADCs with a maximum sampling rate of 1 MSPS, as specified in the Texas Instruments ADS795x family datasheet.
What analog input voltage range do these devices support?
Both devices support a programmable analog input range of 0 V to VREF (full-scale) or 0 V to 2×VREF, where VREF is the external reference voltage. The input range is configured through the device's mode control registers, per the ADS795x datasheet.
What is the difference in qualification grade between the two parts?
The ADS7953SBDBTR is specified for the industrial temperature range of -40°C to +125°C. The ADS7952QDBTRQ1 carries the "Q1" suffix, indicating AEC-Q100 Grade 1 qualification for automotive use, with a specified temperature range of -40°C to +125°C. The Q1 variant is intended for automotive and other high-reliability applications requiring AEC-Q100 compliance.
What digital interface do these ADCs use?
Both devices use an SPI-compatible serial interface for configuration and data readout, supporting daisy-chain operation and multiple device configurations, as documented in the ADS795x family datasheet.
Can the ADS7952QDBTRQ1 be used as a substitute for the ADS7953SBDBTR in an existing design?
Substitution is not direct. The ADS7952QDBTRQ1 has 12 analog input channels versus 16 on the ADS7953SBDBTR, and the pinout and channel mapping differ. A design change and validation against the ADS7952QDBTRQ1 datasheet are required before substitution.