Part A
ADS7953SBDBTR
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 6896 個数
- Package
- TSSOP-38
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7953SBDBTR is a functional replacement candidate for the ADS7950QDBTRQ1 in many applications, sharing the same 12-bit SAR architecture, SPI interface, and TSSOP-38 footprint, but the differing channel count, package qualification, and input configuration require design validation before substitution.
Channel Count
Validation required
Resolution and Interface
High match
Package and Qualification
Validation required
Input Configuration
Validation required
Parts at a glance
Part B
ADS7950QDBTRQ1
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 6130 個数
- Package
- TSSOP-30
- Series
- データ取得 - アナログ/デジタルコンバータ (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 | ADS7953SBDBTR | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both are 12-bit ADCs, so conversion resolution is equivalent and not a differentiator for substitutability. |
| Number of Input Channels | 4 single-ended | 16 single-ended | Channel count determines how many analog signals can be monitored; the ADS7953 supports four times as many inputs, which is a major functional difference. |
| Sampling Rate | 1 MSPS | 1 MSPS | Identical throughput means both can handle the same signal bandwidth per channel, so speed is not a substitution constraint. |
| Supply Voltage (Analog and Digital) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Matching supply ranges allow either device to operate from the same rails, simplifying board-level replacement. |
| Interface Type | SPI (serial) | SPI (serial) | Both use a standard SPI interface, so the host microcontroller connection is compatible without protocol changes. |
| Package | TSSOP-30 (DBT) | TSSOP-38 (DBT) | Different pin counts and footprints mean the PCB layout must be redesigned; the parts are not drop-in package-compatible. |
| Operating Temperature Range | -40°C to +125°C (Q1 automotive) | -40°C to +125°C | Both cover the extended industrial/automotive range, so thermal environment is not a limiting factor for substitution. |
| Input Type | Single-ended | Single-ended | Both accept single-ended inputs, so signal conditioning topology remains the same for either device. |
| Qualification / Grade | AEC-Q100 qualified (automotive) | Industrial grade | The Q1 suffix indicates automotive qualification; substituting an industrial-grade part into an automotive application may violate reliability requirements. |
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 | ADS7953SBDBTR | ADS7950QDBTRQ1 |
|---|---|---|
| Series | microPOWER™ | Automotive, AEC-Q100 |
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 1M | 1M |
| Number of Inputs | 16 | 4 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-S/H-ADC | MUX-PGA-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 | 2.7V ~ 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 ADS7953SBDBTR?
The ADS7950QDBTRQ1 is an automotive-qualified (AEC-Q100 Grade 1) 12-bit, 4-channel, 1 MSPS SAR ADC in a 30-pin TSSOP package, while the ADS7953SBDBTR is a 12-bit, 16-channel, 1 MSPS SAR ADC in a 38-pin TSSOP package. The primary differences are channel count (4 vs 16), package pin count (30 vs 38), and the automotive qualification of the ADS7950QDBTRQ1.
Are the ADS7950QDBTRQ1 and ADS7953SBDBTR pin-to-pin compatible?
No. The ADS7950QDBTRQ1 uses a 30-pin TSSOP package and the ADS7953SBDBTR uses a 38-pin TSSOP package, so they are not pin-to-pin compatible and cannot be dropped into the same PCB footprint without redesign.
Do both devices share the same resolution and sampling rate?
Yes. Both the ADS7950QDBTRQ1 and ADS7953SBDBTR are 12-bit successive-approximation register (SAR) ADCs with a maximum sampling rate of 1 MSPS, per the Texas Instruments ADS795x family datasheet.
What is the difference in input channel count between the two parts?
The ADS7950QDBTRQ1 provides 4 analog input channels, whereas the ADS7953SBDBTR provides 16 analog input channels. This channel-count difference is the main reason the two devices are not interchangeable in multi-channel acquisition designs.
Is the ADS7950QDBTRQ1 automotive qualified while the ADS7953SBDBTR is not?
The ADS7950QDBTRQ1 carries the Q1 suffix and is qualified to AEC-Q100 Grade 1 for automotive applications. The ADS7953SBDBTR does not carry an automotive Q1 qualification suffix and is intended for general-purpose industrial applications.
Do both ADCs use the same serial interface for communication with a host controller?
Yes. Both devices are part of the Texas Instruments ADS795x family and use an SPI-compatible serial interface for configuration and data readback, allowing similar host-side firmware architecture across both parts.
Can the ADS7953SBDBTR be used as a direct substitute for the ADS7950QDBTRQ1 in an existing design?
No. Because of the different package (38-pin vs 30-pin TSSOP), different channel count (16 vs 4), and the absence of automotive Q1 qualification on the ADS7953SBDBTR, a direct substitution is not possible without PCB redesign and revalidation against the target application requirements.