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Texas Instruments ADS7952QDBTRQ1
- Part No.:
- ADS7952QDBTRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS7952QDBTRQ1.pdf
- Description:
- IC ADC 12BIT SAR 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:559
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Product details
Overview
ADS7952QDBTRQ1 from Texas Instruments is a 12-bit, 12-channel automotive-grade SAR ADC with 1-MSPS throughput, dual unipolar input ranges (0–2.5 V or 0–5 V), programmable per-channel alarms, and four configurable GPIOs. It operates from 2.7 V to 5.25 V analog supply and supports isolated, battery-powered systems such as EV battery monitoring and powertrain sensor interfaces.
For engineers reviewing the ADS7952QDBTRQ1 datasheet, ADS7952QDBTRQ1 pinout, ADS7952QDBTRQ1 application, or ADS7952QDBTRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to 125°C), 12-bit resolution with ±0.75 LSB INL, 71.3 dB SINAD at 100 kHz, TSSOP-38 package footprint, and serial SPI-compatible interface with SDO/SDI/SCLK/CS.
Technical Context
The ADS7952QDBTRQ1 implements a capacitor-based successive approximation register (SAR) architecture with integrated sample-and-hold, enabling precise single-shot or continuous conversions without external components. Its multiplexer supports 12 analog inputs (CH0–CH11), selectable via auto/manual mode, and routes signals through a high-impedance PGA path before conversion.
Digital control includes two SW-selectable unipolar input ranges, independent high/low alarm thresholds per channel (programmable in hex), and GPIO0–GPIO3 configured as inputs, outputs, or alarm indicators. Power management features include 1 µA power-down current and <1 µs wake-up time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 1 LSB = 610 µV at 2.5-V reference, sufficient for precision battery cell voltage monitoring. |
| Sample Rate | 1 MSPS - supports real-time capture of fast transients in motor control feedback loops. |
| Analog Supply Range | 2.7 V to 5.25 V - compatible with automotive 3.3-V and 5-V rails without level-shifting. |
| Input Ranges | 0–2.5 V or 0–5 V - software-selectable per system requirement; avoids external gain scaling. |
| INL / DNL | ±0.75 LSB / ±0.75 LSB - ensures monotonicity and <0.018% full-scale error for closed-loop control accuracy. |
| SINAD / SNR | 71.3 dB / 71.7 dB at 100 kHz - enables >11.5 effective number of bits (ENOB) in noise-sensitive automotive sensing. |
| Power-Down Current | 1 µA - extends battery life in always-on vehicle subsystems during idle periods. |
Pinout & Package
The ADS7952QDBTRQ1 is housed in a 38-pin TSSOP package (9.70 mm × 4.40 mm), qualified for automotive PCB assembly and thermal cycling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH11 | Analog input channels | 12 single-ended inputs; routed through internal mux to ADC core; no external buffering required for high-Z sources. |
| AINP / AINM | Differential analog inputs | Supports pseudo-differential measurement; AINM tied to AGND for true single-ended operation. |
| REFP / REFM | Reference voltage terminals | Accept external 2–3 V reference (e.g., REF5025); REFM must be connected to AGND for stable conversion reference. |
| SDO / SDI / SCLK / CS | SPI serial interface | Full-duplex 4-wire SPI; MSB-first format; supports daisy-chaining multiple devices on shared bus. |
| GPIO0–GPIO3 | Programmable I/O | Configurable as digital I/O or alarm flags (e.g., GPIO1 = low-alarm output, GPIO2 = range select). |
| +VA / AGND / +VBD / BDGND | Power and ground | Separate analog/digital supplies reduce noise coupling; AGND and BDGND must be connected at single point on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to 125°C ambient), HBM ESD Level H2, CDM Level C4B - meets ISO 26262 ASIL-B supporting hardware requirements. |
| Per-channel alarm logic | Two independently programmable thresholds per channel (0x000–0xFFC hex) - enables autonomous overvoltage/undervoltage detection without host CPU intervention. |
| Low-power operation | 14.5 mW typical at 5 V / 1 MSPS; 1 µA power-down - reduces thermal load in densely packed ECUs and extends runtime in 12-V battery systems. |
| Flexible input configuration | SW-selectable 0–2.5 V or 0–5 V unipolar range - eliminates need for external resistor dividers or op-amp gain stages in mixed-signal sensor networks. |
| Integrated sample-and-hold | Capacitor-based SAR with inherent track/hold - removes external hold capacitor and simplifies layout for high-speed acquisition. |
Applications
| Electric Vehicle Battery Management | Automotive Powertrain Control |
|---|---|
Use Scenario: Monitoring individual Li-ion cell voltages (0–5 V range) across 12-series packs in real time. IC Role / Device Role / Timing Role: 12-channel SAR ADC with per-cell high/low alarm triggers and SPI interface to BMS microcontroller. Use Value: Enables autonomous cell-level fault detection with <1 µs response latency, reducing host processor load and improving functional safety compliance. | Use Scenario: Sampling throttle position, camshaft angle, and knock sensor signals in gasoline engine control units. IC Role / Device Role / Timing Role: High-speed analog front-end with 1-MSPS sampling and 71.3 dB SINAD for accurate combustion timing. Use Value: Delivers 12-bit precision across temperature extremes, supporting ASIL-B diagnostics without external calibration. |
| Onboard Charger Monitoring | Advanced Driver Assistance Systems |
Use Scenario: Measuring DC-link voltage, AC input current, and temperature sensors in bidirectional OBC modules. IC Role / Device Role / Timing Role: Multichannel ADC with isolated 5-V input range and GPIO-driven alarm signaling to protection circuitry. Use Value: Supports fast overvoltage shutdown (<10 µs propagation via GPIO) while maintaining 12-bit resolution under EMI-heavy conditions. | Use Scenario: Acquiring radar power supply rail voltages and IMU analog outputs in ADAS domain controllers. IC Role / Device Role / Timing Role: Automotive-qualified ADC with 125°C operation and low crosstalk (–85 dB memory crosstalk) for mixed-signal signal integrity. Use Value: Ensures reliable sensor fusion data acquisition despite simultaneous switching noise from high-speed SerDes links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953QDBTRQ1 | 12-channel, 12-bit, identical TSSOP-38 package and pinout; differs only in GPIO alarm mapping (GPIO1 = high-alarm, GPIO0 = low-alarm). | Same automotive use cases; requires firmware update for alarm flag polarity handling. | Select when existing design uses GPIO1 for high-alarm assertion and requires no PCB change. |
| MAX11131ATJ+T | 12-bit, 8-channel, 1-MSPS, TDFN-32; lacks per-channel alarms and GPIOs; requires external reference and level-shifting for 5-V inputs. | Suitable for space-constrained non-automotive industrial DAQ; not AEC-Q100 qualified. | Choose only for cost-sensitive, non-automotive designs where alarm autonomy and extended temperature range are not required. |
Compared with ADS7953QDBTRQ1, the ADS7952QDBTRQ1 offers identical performance and footprint but with reversed GPIO alarm assignment-requiring minor firmware adaptation. Against MAX11131ATJ+T, ADS7952QDBTRQ1 provides automotive qualification, integrated alarms, and wider input range support, justifying its use in safety-critical vehicle systems.
Availability
ADS7952QDBTRQ1 is available at Aetrix Electronics and suitable for electric vehicle battery management, automotive powertrain control, and onboard charger monitoring requiring stable component supply across extended temperature and lifecycle demands.
Supply support for ADS7952QDBTRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive ICs, with decades of expertise in high-reliability signal chain solutions.
The ADS79xx-Q1 product line was designed specifically for automotive sensor signal acquisition-delivering AEC-Q100 qualified, multichannel, micropower SAR ADCs with integrated alarms and flexible I/O for next-generation ECU architectures.
FAQ
What is the maximum sample rate supported by the ADS7952QDBTRQ1?
The ADS7952QDBTRQ1 supports a maximum throughput rate of 1 MSPS when operated with a 20-MHz SCLK. This is achieved using its internal capacitor-based SAR architecture with 800 ns conversion time and 325 ns acquisition time, enabling real-time capture of fast analog events in automotive control loops without external timing components.
Does the ADS7952QDBTRQ1 require an external reference voltage?
Yes, the ADS7952QDBTRQ1 requires an external reference voltage applied to the REFP pin (2 V to 3 V, typically 2.5 V). The device does not include an internal reference; it relies on a precision external source like the REF5025 to ensure 12-bit accuracy. REFM must be connected to AGND, and reference impedance must remain below 100 kΩ for optimal performance.
How are the GPIO pins configured on the ADS7952QDBTRQ1?
The ADS7952QDBTRQ1 features four programmable GPIOs (GPIO0–GPIO3) that can be individually set as inputs, outputs, or alarm indicators via SPI register writes. For example, GPIO2 selects input range (high = 0–5 V), GPIO1 asserts low-alarm, and GPIO0 asserts high-alarm-enabling autonomous fault signaling without host processor polling.
What is the operating temperature range for the ADS7952QDBTRQ1?
The ADS7952QDBTRQ1 is qualified for Device Temperature Grade 1 per AEC-Q100, with a specified ambient operating temperature range of –40°C to 125°C. This rating covers full electrical performance including 12-bit resolution, ±0.75 LSB INL, and 1-MSPS throughput across the entire range, making it suitable for under-hood and powertrain applications.
Can the ADS7952QDBTRQ1 interface directly with a 1.8-V microcontroller?
Yes, the ADS7952QDBTRQ1 supports an I/O supply voltage (+VBD) range of 1.7 V to 5.25 V, allowing direct interfacing with 1.8-V logic. Its digital inputs accept VIH ≥ 0.7 × V(+VBD) and VIL ≤ 0.4 V, and outputs drive VOH ≥ V(+VBD) – 0.2 V and VOL ≤ 0.4 V-ensuring robust SPI communication without level shifters when +VBD = 1.8 V.
ADS7952QDBTRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 12
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-PGA-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 1.7V ~ 5.25V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 38-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADS7952QDBTRQ1 FAQ
1.How can I place an order for ADS7952QDBTRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7952QDBTRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS7952QDBTRQ1 reliable?
The price and inventory of ADS7952QDBTRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7952QDBTRQ1 is usually 5 days.
3.What payment methods are accepted for ADS7952QDBTRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7952QDBTRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7952QDBTRQ1?
ADS7952QDBTRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7952QDBTRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS7952QDBTRQ1?
For technical support, including ADS7952QDBTRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7952QDBTRQ1 requirements.
6.How does Aetrix verify that ADS7952QDBTRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS7952QDBTRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS7952QDBTRQ1 meets industry standards.
7.What is the process for return or replacement of ADS7952QDBTRQ1?
All ADS7952QDBTRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7952QDBTRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS7952QDBTRQ1 part is unused and in its original packaging.
Return procedure for ADS7952QDBTRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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