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 and ADS7953SBDBTG4 are functionally compatible 12-bit, 16-channel SAR ADCs in the same TSSOP-38 package with matching pinout and SPI interface, making them viable drop-in candidates for most designs. The primary distinction is qualification grade: the Q1 variant is AEC-Q100 automotive-qualified while the SBDBTG4 is an industrial-grade equivalent, so the substitution is appropriate only where automotive qualification is not mandated.
Resolution and Channel Count
High match
Package and Pinout
High match
Supply Voltage Range
High match
Qualification Grade
Validation required
Parts at a glance
Part B
ADS7953SBDBTG4
Техасские инструменты
- Lifecycle
- Active
- Stock
- 4855 ПКС
- Package
- TFSOP-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 | ADS7953QDBTRQ1 | ADS7953SBDBTG4 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Determines the smallest analog voltage change the ADC can distinguish; must match for equivalent measurement accuracy. |
| Number of Channels | 16 | 16 | Defines how many analog inputs can be multiplexed into the ADC; critical for system channel count compatibility. |
| Sampling Rate | 1 MSPS | 1 MSPS | Sets the maximum conversion throughput; must be adequate for the signal bandwidth being digitized. |
| Supply Voltage (Analog) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Determines the input voltage range and interface levels; must be compatible with the system power rails. |
| Interface Type | SPI | SPI | Defines the digital communication protocol with the host controller; must match the system bus architecture. |
| Package / Case | TSSOP-38 | TSSOP-38 | Affects PCB footprint and thermal characteristics; identical packages allow drop-in board compatibility. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +85°C | Defines the environmental limits for reliable operation; the automotive-grade Q1 variant supports a wider range than the standard grade. |
| Qualification / Grade | AEC-Q100 Qualified (Automotive) | Standard Industrial Grade | Indicates the reliability and qualification level; automotive-qualified parts are tested to stricter standards for harsh environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7953QDBTRQ1 | ADS7953SBDBTG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Series | Automotive, AEC-Q100 | microPOWER™ |
| Part Status | Active | Discontinued at Digi-Key |
| 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 | 1.7V ~ 5.25V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Features | PGA | - |
Frequently asked questions
What are the key differences between the ADS7953QDBTRQ1 and the ADS7953SBDBTG4?
The ADS7953QDBTRQ1 is an automotive-qualified (AEC-Q100 Grade 1) 12-bit, 1-MSPS, 16-channel SAR ADC in a 38-pin TSSOP package, while the ADS7953SBDBTG4 is the non-automotive industrial-grade version of the same 12-bit, 1-MSPS, 16-channel SAR ADC family, also in a 38-pin TSSOP package. The primary differences are qualification grade (automotive vs. industrial), operating temperature range, and orderable part numbering/screening.
Are the ADS7953QDBTRQ1 and ADS7953SBDBTG4 pin-compatible?
Yes. Both devices are offered in the same 38-pin TSSOP (DBT) package with the same pinout, so they are pin-compatible at the package level. However, substitution should be validated against the specific application's qualification and temperature requirements.
What is the resolution and sampling rate of these ADCs?
Both the ADS7953QDBTRQ1 and ADS7953SBDBTG4 are 12-bit successive-approximation-register (SAR) analog-to-digital converters with a maximum sampling rate of 1 MSPS.
How many input channels do these devices support?
Both devices provide 16 single-ended input channels, configurable as 8 differential pairs, with an input multiplexer and programmable sequencer.
What is the difference in operating temperature range between the two parts?
The ADS7953QDBTRQ1 is qualified for the automotive temperature range of -40°C to +125°C (AEC-Q100 Grade 1). The ADS7953SBDBTG4 is specified over the industrial temperature range of -40°C to +125°C as well, but without AEC-Q100 automotive qualification.
Do both parts support the same serial interface?
Yes. Both devices use a SPI-compatible serial interface for configuration and data readback, supporting daisy-chain operation and multiple devices on a shared bus.
Can the ADS7953SBDBTG4 be used as a drop-in replacement for the ADS7953QDBTRQ1 in an automotive design?
No. The ADS7953SBDBTG4 lacks AEC-Q100 automotive qualification and the associated screening and documentation required for automotive applications. For automotive designs, the ADS7953QDBTRQ1 should be used to meet qualification requirements.
What is the analog supply voltage range for these ADCs?
Both devices operate from a single analog supply (AVDD) of 2.7 V to 5.25 V, with a separate digital supply (DVDD) of 1.7 V to 5.25 V, allowing flexible interfacing to low-voltage logic.