Part A
ADS7950QDBTRQ1
德州儀器
- Lifecycle
- Active
- Stock
- 6130 件
- Package
- TSSOP-30
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS7952SBDBTG4 is a viable functional replacement candidate for the ADS7950QDBTRQ1 in many designs, as both share the same 12-bit SAR architecture, SPI interface, and TSSOP-38 footprint. However, the ADS7952SBDBTG4 offers 12 single-ended channels versus 4 on the ADS7950QDBTRQ1, and the automotive qualification status differs, so designers must validate channel count requirements and qualification needs before substitution.
Resolution and Architecture
High match
Package and Pinout
High match
Channel Count
Validation required
Qualification Grade
Validation required
Parts at a glance
Part B
ADS7952SBDBTG4
德州儀器
- Lifecycle
- Active
- Stock
- 3680 件
- Package
- TFSOP-38
- Series
- 資料獲取-模數轉換器（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 | ADS7950QDBTRQ1 | ADS7952SBDBTG4 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both are 12-bit ADCs, so measurement precision is equivalent and they are interchangeable on that basis. |
| Number of Input Channels | 4 single-ended | 12 single-ended | Channel count determines how many analog signals can be monitored; a 4-channel part cannot directly replace a 12-channel part in multi-signal systems. |
| 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 both to operate from the same system rail without level shifting. |
| Interface Type | SPI | SPI | A common SPI interface means the same host controller and firmware protocol can drive either device. |
| Package / Case | TSSOP-30 | TSSOP-38 | Different package footprints and pin counts require PCB layout changes, preventing direct drop-in substitution. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Equivalent temperature ratings ensure both meet the same environmental and automotive-grade requirements. |
| Input Type | Single-ended | Single-ended | Both accept single-ended inputs, so signal conditioning circuitry can remain the same. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7950QDBTRQ1 | ADS7952SBDBTG4 |
|---|---|---|
| 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 | 4 | 12 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-PGA-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 ADS7950QDBTRQ1 and the ADS7952SBDBTG4?
The ADS7950QDBTRQ1 is an automotive-qualified (AEC-Q100 Grade 1) 12-bit, 1-MSPS, 4-channel SAR ADC in a 30-pin TSSOP (DBT) package, while the ADS7952SBDBTG4 is a non-automotive 12-bit, 1-MSPS, 12-channel SAR ADC in a 38-pin TSSOP (DBT) package. The primary differences are channel count (4 vs 12), qualification grade (automotive vs industrial), and package pin count.
Are the ADS7950QDBTRQ1 and ADS7952SBDBTG4 pin-to-pin compatible?
No. The ADS7950QDBTRQ1 uses a 30-pin TSSOP package, whereas the ADS7952SBDBTG4 uses a 38-pin TSSOP package. The different pin counts and pinouts prevent direct PCB footprint interchangeability.
Do both devices share the same resolution and sampling rate?
Yes. Both the ADS7950QDBTRQ1 and ADS7952SBDBTG4 are 12-bit successive-approximation register (SAR) ADCs with a maximum throughput of 1 MSPS, per the respective Texas Instruments datasheets.
What is the difference in input channel count between these two ADCs?
The ADS7950QDBTRQ1 provides 4 analog input channels, while the ADS7952SBDBTG4 provides 12 analog input channels. This difference affects multiplexer configuration and the number of signals that can be sampled per conversion cycle.
Is the ADS7950QDBTRQ1 qualified for automotive applications while the ADS7952SBDBTG4 is not?
Yes. The ADS7950QDBTRQ1 carries the Q1 automotive qualification designation (AEC-Q100 Grade 1, -40°C to +125°C), whereas the ADS7952SBDBTG4 is a standard industrial-grade device and does not carry automotive Q1 qualification.
Do both parts support the same serial interface?
Yes. Both devices use an SPI-compatible serial interface for configuration and data readback, as specified in their Texas Instruments datasheets, allowing connection to standard microcontrollers and DSPs.
Can the ADS7952SBDBTG4 be used as a drop-in replacement for the ADS7950QDBTRQ1 in an existing design?
No. Beyond the package and pin-count mismatch (38-pin vs 30-pin), the channel count differs (12 vs 4), and the ADS7952SBDBTG4 lacks the automotive Q1 qualification. A redesign of the PCB footprint and revalidation against the target application's qualification requirements would be necessary.