Part A
ADS7953QDBTRQ1
National Semiconductor
- Lifecycle
- Active
- Stock
- 1543 Stückzahl
- Package
- TSSOP-38
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7953QDBTRQ1 is a functional replacement candidate for the ADS7952QDBTRQ1, sharing the same package, pinout, interface, and automotive qualification, with the primary difference being the higher channel count of the ADS7953. Designers must validate the additional channel handling in firmware and confirm that the multiplexer configuration and timing meet the target application requirements before substituting.
Package Type
High match
Resolution
High match
Channel Count
Not compatible
Serial Interface
Validation required
Parts at a glance
Part B
ADS7952QDBTRQ1
Texas Instruments
- Lifecycle
- Active
- Stock
- 6054 Stückzahl
- Package
- TSSOP-38
- 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 | ADS7952QDBTRQ1 | ADS7953QDBTRQ1 | Why it matters |
|---|---|---|---|
| Number of Input Channels | 12 | 16 | Determines how many analog signals can be sampled; a 16-channel device can replace a 12-channel one only if the extra channels are unused or the board is redesigned. |
| Resolution | 12 bit | 12 bit | Both provide the same quantization accuracy, so measurement precision is unchanged when substituting one for the other. |
| Sampling Rate | 1 MSPS | 1 MSPS | Identical throughput means timing and signal bandwidth requirements are met by either part. |
| Supply Voltage (Analog) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Same analog supply range allows direct drop-in use in the same power rail design. |
| Interface | SPI | SPI | Matching serial interface ensures firmware and host communication remain compatible. |
| Package | TSSOP-38 | TSSOP-38 | Same footprint and pin count enable physical board compatibility without layout changes. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Identical automotive-grade temperature range supports the same environmental qualification. |
| Input Type | Single-ended | Single-ended | Same input configuration means the same signal conditioning circuitry can be reused. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7953QDBTRQ1 | ADS7952QDBTRQ1 |
|---|---|---|
| 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 | 16 | 12 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-PGA-S/H-ADC | MUX-PGA-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 |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What is the primary difference between the ADS7952QDBTRQ1 and ADS7953QDBTRQ1?
The main difference is the number of analog input channels. The ADS7952QDBTRQ1 is a 12-channel, 12-bit ADC, while the ADS7953QDBTRQ1 is a 16-channel, 12-bit ADC. Both are automotive-qualified (AEC-Q100) successive-approximation register (SAR) ADCs from Texas Instruments in a 38-pin TSSOP (DBT) package.
Are the ADS7952QDBTRQ1 and ADS7953QDBTRQ1 pin-compatible?
No. Although both devices share the same 38-pin TSSOP (DBT) package outline, the ADS7953QDBTRQ1 uses the additional pins for the extra analog inputs (channels 12 through 15) that are not present on the ADS7952QDBTRQ1. A direct drop-in substitution is therefore not possible without verifying pin function differences against the respective datasheets.
What is the resolution and sampling rate of these ADCs?
Both the ADS7952QDBTRQ1 and ADS7953QDBTRQ1 are 12-bit resolution SAR ADCs with a maximum throughput of 1 MSPS (1 megasample per second).
What analog input voltage range do these devices support?
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 is configured via the device's control registers over the SPI interface.
What digital interface do the ADS7952QDBTRQ1 and ADS7953QDBTRQ1 use?
Both devices use a SPI-compatible serial interface for configuration and data readout, supporting daisy-chain operation and a dedicated interrupt/output pin for host notification.
Are these components automotive-qualified?
Yes. The "Q1" suffix in both part numbers indicates AEC-Q100 qualification for automotive applications, and both are specified over the automotive temperature range of -40°C to +125°C.
Can the ADS7952QDBTRQ1 be replaced by the ADS7953QDBTRQ1 in an existing design?
Not as a direct drop-in replacement. While both share the same package, resolution, sampling rate, and SPI interface, the ADS7953QDBTRQ1 provides four additional analog input channels. The replacement is only valid if the PCB layout accommodates the additional input pins and the firmware is updated to account for the different channel count and register mapping, as verified against the Texas Instruments datasheets.