Part A
ADS7952QDBTRQ1
Texas Instruments
- Lifecycle
- Active
- Stock
- 6054 PCS
- Package
- TSSOP-38
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7953SBDBTG4 is a functional replacement candidate for the ADS7952QDBTRQ1, sharing the same 12-bit SAR architecture, SPI interface, and TSSOP-38 footprint, but it provides 16 channels instead of 12 and is rated for the industrial temperature range rather than automotive AEC-Q100 qualification. Engineers should validate channel-count requirements and automotive qualification needs before substituting in production designs.
Resolution and Architecture
High match
Package and Pinout
High match
Channel Count
Validation required
Qualification Grade
Not compatible
Parts at a glance
Part B
ADS7953SBDBTG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 4855 PCS
- Package
- TFSOP-38
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | ADS7952QDBTRQ1 | ADS7953SBDBTG4 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both are 12-bit ADCs, so measurement precision is equivalent and they are interchangeable on resolution grounds. |
| Number of Input Channels | 12 single-ended | 16 single-ended | Channel count determines how many analog signals can be sampled; the ADS7953 offers four additional inputs, which affects system architecture and pin compatibility. |
| Sampling Rate | 1 MSPS | 1 MSPS | Identical throughput means both can handle the same signal bandwidth and timing requirements. |
| Supply Voltage (Analog) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Matching analog supply ranges allow either part to operate from the same rail without redesign. |
| Interface Type | SPI (serial) | SPI (serial) | Both use a standard SPI interface, so the same host controller and firmware protocol can drive either device. |
| Package / Pin Count | 38-pin TSSOP (DBT) | 38-pin TSSOP (DBT) | Identical package and pin count support drop-in PCB compatibility, though channel mapping must be verified. |
| Operating Temperature Range | -40 °C to +125 °C (Q1 automotive) | -40 °C to +125 °C | Equivalent temperature ratings ensure both parts suit the same environmental conditions. |
| Input Type | Single-ended | Single-ended | Both accept single-ended inputs, so signal conditioning circuitry can remain unchanged. |
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 | ADS7952QDBTRQ1 | 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 | 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 | 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 ADS7952QDBTRQ1 and the ADS7953SBDBTG4?
The ADS7952QDBTRQ1 is a 12-bit, 12-channel, 1-MSPS SAR ADC in a 38-pin TSSOP package that is AEC-Q100 qualified for automotive applications. The ADS7953SBDBTG4 is a 12-bit, 16-channel, 1-MSPS SAR ADC in a 38-pin TSSOP package. The primary differences are channel count (12 vs. 16) and qualification grade (automotive Q1 vs. the non-automotive SB grade).
Are the ADS7952QDBTRQ1 and ADS7953SBDBTG4 pin-compatible?
Both devices are offered in the same 38-pin TSSOP (DBT) package, but they are not functionally interchangeable pin-for-pin because the ADS7953 provides four additional analog input channels. Pin function assignments must be verified against the respective datasheets before any layout reuse.
Do both ADCs share the same resolution and sampling rate?
Yes. Both the ADS7952QDBTRQ1 and ADS7953SBDBTG4 are 12-bit successive-approximation register (SAR) ADCs with a maximum throughput of 1 MSPS, per the Texas Instruments ADS795x family datasheet.
What analog input configuration do these devices support?
Both parts are part of the ADS795x family and support single-ended and pseudo-differential input configurations with a programmable input range, selectable via the serial interface. The ADS7952 offers 12 input channels and the ADS7953 offers 16 input channels.
What is the significance of the Q1 suffix on the ADS7952QDBTRQ1?
The Q1 suffix indicates AEC-Q100 qualification, meaning the device is qualified for automotive use. The ADS7953SBDBTG4 does not carry this automotive qualification and is intended for general-purpose applications.
What supply voltage and interface do these ADCs use?
Both devices operate from a single analog supply in the 2.7 V to 5.25 V range with a separate digital supply, and they communicate over an SPI-compatible serial interface, as specified in the ADS795x datasheet.
Can the ADS7953SBDBTG4 be used as a drop-in replacement for the ADS7952QDBTRQ1?
No. Although both are 12-bit, 1-MSPS SAR ADCs in the same 38-pin TSSOP package, the ADS7953 has 16 channels versus 12 on the ADS7952, and the ADS7953SBDBTG4 lacks AEC-Q100 automotive qualification. A replacement requires schematic, layout, and qualification review against the target design requirements.