Part A
ADS7952QDBTRQ1
Texas Instruments
- Lifecycle
- Active
- Stock
- 6054 Stückzahl
- Package
- TSSOP-38
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7952QDBTRQ1 is a functional replacement candidate for the ADS7950QDBTRQ1 within the same automotive-qualified family, sharing an identical package, pinout, interface, and reference architecture. The primary distinction is the higher channel count and correspondingly higher power consumption of the ADS7952QDBTRQ1, which must be validated against the target design's power budget and multiplexer requirements before substitution.
Package Type
High match
Resolution
High match
Channel Count
Validation required
Power Consumption
Validation required
Parts at a glance
Part B
ADS7950QDBTRQ1
Texas Instruments
- Lifecycle
- Active
- Stock
- 6130 Stückzahl
- Package
- TSSOP-30
- Series
- Datenerfassung mit Analog to Digital Converters (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 | ADS7952QDBTRQ1 | Why it matters |
|---|---|---|---|
| Number of Input Channels | 4 single-ended | 12 single-ended | Determines how many analog signals can be monitored; a 4-channel part cannot directly replace a 12-channel part in multi-sensor systems. |
| Resolution | 12 bit | 12 bit | Both provide the same measurement precision, so accuracy-related performance is equivalent. |
| Sampling Rate | 1 MSPS | 1 MSPS | Identical throughput means timing and signal bandwidth requirements are met by either device. |
| Supply Voltage (Analog and Digital) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Same supply range allows both to operate from common system rails without level shifting. |
| Interface Type | SPI (serial) | SPI (serial) | Identical serial interface ensures firmware and host controller compatibility. |
| Package | TSSOP-30 | TSSOP-30 | Same footprint and pin count enable drop-in board replacement without layout changes. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Both are automotive-qualified for the same harsh environment conditions. |
| Input Type | Single-ended | Single-ended | Same input configuration means signal conditioning circuitry can remain unchanged. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7952QDBTRQ1 | ADS7950QDBTRQ1 |
|---|---|---|
| Series | Automotive, AEC-Q100 | Automotive, AEC-Q100 |
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 1M | 1M |
| Number of Inputs | 12 | 4 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-PGA-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 | 1.7V ~ 5.25V | 1.7V ~ 5.25V |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What are the key differences between the ADS7950QDBTRQ1 and ADS7952QDBTRQ1?
Both are automotive-qualified, 12-bit successive-approximation ADCs from Texas Instruments in a 30-pin TSSOP (DBT) package with an SPI-compatible interface. The primary difference is channel count: the ADS7950QDBTRQ1 provides 4 single-ended input channels, while the ADS7952QDBTRQ1 provides 12 single-ended input channels. Both support a 2.7 V to 5.25 V analog supply range and are AEC-Q100 qualified.
Are the ADS7950QDBTRQ1 and ADS7952QDBTRQ1 pin-compatible?
No. Although both devices share the same 30-pin TSSOP (DBT) package outline, the ADS7950QDBTRQ1 uses fewer analog input pins (4 channels) while the ADS7952QDBTRQ1 uses 12 analog input channels. The pin assignments for the analog inputs therefore differ, so they are not drop-in pin-compatible replacements.
Do both devices have the same resolution and sampling rate?
Yes. Both the ADS7950QDBTRQ1 and ADS7952QDBTRQ1 are 12-bit ADCs with a maximum sampling rate of 1 MSPS, as specified in the Texas Instruments datasheet for the ADS795x-Q1 family.
What is the analog input voltage range for these ADCs?
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 configuration is selected through the device's mode control registers via the SPI interface.
What supply voltages do the ADS7950QDBTRQ1 and ADS7952QDBTRQ1 require?
Both devices operate from an analog supply (AVDD) of 2.7 V to 5.25 V and a digital supply (DVDD) of 1.7 V to 5.25 V, per the ADS795x-Q1 datasheet. The external reference voltage (VREF) range is 2.5 V to AVDD.
Are both components AEC-Q100 qualified for automotive applications?
Yes. Both the ADS7950QDBTRQ1 and ADS7952QDBTRQ1 carry the Q1 suffix and are AEC-Q100 qualified, making them suitable for automotive and other harsh-environment applications as documented by Texas Instruments.
Can the ADS7950QDBTRQ1 be substituted with the ADS7952QDBTRQ1 in an existing design?
Not as a direct drop-in replacement. While both share the same package, resolution, sampling rate, and supply requirements, the differing channel count and analog input pin assignments require PCB layout changes and firmware/register configuration review. Substitution should only be done after validating pin mapping and channel configuration against the datasheet.
What interface do these ADCs use for communication?
Both devices use a SPI-compatible serial interface for configuration and data readout. The interface supports daisy-chain operation and includes a dedicated interrupt/output pin, as described in the ADS795x-Q1 family datasheet.