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Texas Instruments ADS7954QDBTRQ1
- Part No.:
- ADS7954QDBTRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 30-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS7954QDBTRQ1.pdf
- Description:
- IC ADC 10BIT SAR 30TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,314
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Product details
Overview
ADS7954QDBTRQ1 from Texas Instruments is a 10-bit, 4-channel, automotive-qualified SAR ADC with 1-MSPS throughput, programmable unipolar input ranges (0–2.5 V or 0–5 V), dual alarm thresholds per channel, and four configurable GPIOs. It operates from 2.7 V to 5.25 V analog supply and supports isolated battery-powered sensing in vehicle powertrain monitoring.
For engineers reviewing the ADS7954QDBTRQ1 datasheet, ADS7954QDBTRQ1 pinout, ADS7954QDBTRQ1 application, or ADS7954QDBTRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to 125°C), 10-bit resolution with ±0.2 LSB integral linearity, low 1.8 mA typical supply current at 1 MSPS, and TSSOP-30 package compatibility with space-constrained automotive PCB layouts.
Technical Context
The ADS7954QDBTRQ1 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 auto/manual channel sequencing across four analog inputs (CH0–CH3), with MXO providing buffered output for external PGA interfacing.
Digital control uses a standard SPI-compatible 3-wire interface (CS, SCLK, SDI/SDO) with MSB-first data format and 20-MHz max SCLK. Two independently programmable alarm registers per channel trigger GPIO0/GPIO1 outputs, while GPIO2 selects input range and GPIO3 enables power-down mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital codes for medium-precision sensor digitization in automotive subsystems |
| Sample Rate | 1 MSPS - supports real-time monitoring of fast transients such as engine knock or battery voltage spikes |
| Input Channels | 4 single-ended - CH0–CH3 mapped to pins 28, 27, 26, 25 respectively; no internal connection on CH4–CH15 |
| Input Ranges | SW-selectable 0–2.5 V or 0–5 V - accommodates both low-voltage sensors and full-battery-range measurements |
| Integral Linearity | ±0.2 LSB - ensures <0.02% full-scale error for accurate calibration-critical applications like throttle position feedback |
| Power Consumption | 1.8 mA at 1 MSPS (VVA = 3.3 V) - enables micropower operation in always-on vehicle modules |
| Power-Down Current | 1 µA - reduces quiescent draw during sleep modes in telematics or ADAS domain controllers |
Pinout & Package
TSSOP-30 package (7.80 mm × 4.40 mm), RoHS-compliant, thermally optimized for automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH3 | Analog input channels | Single-ended inputs mapped to pins 28, 27, 26, 25; support direct connection to resistive sensors or conditioned signals |
| AINP / AINM | Differential reference inputs | AINP (pin 8) accepts reference source; AINM (pin 9) is reference ground - used for external precision reference buffering |
| REFP / REFM | Reference voltage terminals | REFP (pin 4) accepts 2–3 V external reference; REFM (pin 3) is reference ground - enables stable scaling independent of supply |
| CS / SCLK / SDI / SDO | SPI serial interface | Standard 3-wire SPI (pins 23–26); supports daisy-chaining multiple ADCs via shared clock/select lines |
| GPIO0–GPIO3 | Programmable I/O | GPIO0/GPIO1 (pins 37/38) output alarm status; GPIO2 (pin 1) selects input range; GPIO3 (pin 2) controls power-down |
| +VA / AGND / +VBD / BDGND | Power domains | +VA (pin 29) powers analog core; AGND (pin 19) isolates analog return; +VBD (pin 36) powers digital I/O; BDGND (pin 35) separates digital return |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to 125°C ambient) - validated for engine control units, battery management, and ADAS sensor hubs |
| Dual per-channel alarms | Independent high/low threshold registers (000h–FFCh) - enable autonomous overvoltage/undervoltage detection without host CPU intervention |
| Configurable GPIOs | Four software-programmable I/Os - allow flexible system-level signaling (e.g., GPIO0 = high-alarm flag, GPIO2 = range select) |
| Low-noise SAR architecture | 60 dB SNR at 100 kHz - sufficient for accurate digitization of temperature, pressure, and current-sense signals in noisy automotive environments |
| Wide supply flexibility | 2.7–5.25 V analog supply and 1.7–5.25 V I/O supply - simplifies integration with mixed-voltage ECUs using 3.3 V logic and 5 V analog rails |
Applications
| Engine Control Unit (ECU) Sensor Monitoring | Battery Management System (BMS) Voltage Tracking |
|---|---|
Use Scenario: Real-time acquisition of throttle position, coolant temperature, and intake air pressure signals in gasoline/diesel powertrains. IC Role / Device Role / Timing Role: 10-bit SAR ADC digitizes four analog sensor outputs with 1-MSPS throughput and hardware-triggered alarms for fault detection. Use Value: Enables deterministic response to out-of-range conditions (e.g., overheating) within ≤1 µs latency, meeting ISO 26262 ASIL-B timing requirements. |
Use Scenario: Simultaneous sampling of cell voltages, pack voltage, and auxiliary battery levels in 12 V/48 V hybrid architectures. IC Role / Device Role / Timing Role: Four-channel ADC interfaces directly to shunt-based current sense and voltage dividers, with GPIO-driven alarm outputs tied to safety microcontroller interrupts. Use Value: Reduces BOM count by eliminating external comparators; 1 µA power-down mode extends standby life in parked-vehicle scenarios. |
| Advanced Driver Assistance Systems (ADAS) Power Monitoring | Electric Power Steering (EPS) Motor Feedback |
Use Scenario: Continuous supervision of camera module, radar SoC, and domain controller rail voltages to prevent brownout-induced image corruption or false object detection. IC Role / Device Role / Timing Role: ADC monitors 3.3 V, 5 V, and 12 V supplies via resistor dividers; alarms notify host MCU of deviations exceeding ±5% tolerance. Use Value: Provides deterministic power health reporting with <1 LSB error, supporting functional safety diagnostics per ISO 26262 Part 5 Annex D. |
Use Scenario: Acquisition of motor phase currents and Hall-effect rotor position signals in EPS torque assist algorithms. IC Role / Device Role / Timing Role: 10-bit resolution captures fine-grained current changes; 1-MSPS rate aligns with 20 kHz PWM switching for closed-loop torque control. Use Value: Delivers ±0.2 LSB INL accuracy required for <1% torque estimation error, improving steering feel and energy efficiency. |
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-bit resolution, same 4-channel TSSOP-30 package, identical pinout and interface | Higher precision required for torque sensor calibration or high-fidelity audio preprocessing | Select when >10-bit ENOB is mandatory and system firmware supports extended data word length |
| ADS7950QDBTRQ1 | 8-bit resolution, same 4-channel TSSOP-30 footprint, identical timing and GPIO functionality | Cost-sensitive body electronics (e.g., seat position, mirror control) where 256-level quantization suffices | Choose for non-safety-critical functions where lower cost and reduced processing overhead outweigh resolution loss |
Compared with ADS7954QDBTRQ1, the ADS7953QDBTRQ1 offers higher resolution but increased code density handling, while the ADS7950QDBTRQ1 trades precision for lower BOM cost and simpler firmware-both retain identical automotive qualification, package, and alarm architecture.
Availability
ADS7954QDBTRQ1 is available at Aetrix Electronics and suitable for automotive ECU sensor monitoring, battery management system voltage tracking, and ADAS power rail supervision requiring stable component supply across extended temperature and lifecycle demands.
Supply support for ADS7954QDBTRQ1 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 and embedded processing technologies, with deep expertise in automotive-grade signal chain solutions.
The ADS79xx-Q1 product line delivers automotive-qualified, multichannel SAR ADCs designed for reliable sensor data acquisition in harsh environments-including engine compartments, battery packs, and ADAS sensor nodes.
FAQ
What is the maximum sample rate supported by the ADS7954QDBTRQ1?
The ADS7954QDBTRQ1 supports a maximum throughput rate of 1 MSPS when operated with a 20-MHz SCLK. This is achieved with a fixed 16-clock conversion cycle and 800-ns conversion time, enabling real-time capture of fast automotive transients such as ignition pulses or regenerative braking events. The ADS7954QDBTRQ1 maintains this rate across its full –40°C to 125°C operating range.
Does the ADS7954QDBTRQ1 require an external reference voltage?
Yes, the ADS7954QDBTRQ1 requires an external reference voltage applied to the REFP pin (pin 4), with REFM (pin 3) serving as reference ground. The device supports 2 V to 3 V reference inputs, and TI recommends using the REF5025 for optimal 2.5-V stability. Internal reference is not provided; omitting the external reference will result in undefined conversion results for the ADS7954QDBTRQ1.
How many analog input channels does the ADS7954QDBTRQ1 have, and what are their pin assignments?
The ADS7954QDBTRQ1 has four single-ended analog input channels: CH0 (pin 28), CH1 (pin 27), CH2 (pin 26), and CH3 (pin 25). Pins CH4 through CH15 are marked "NC" (no internal connection) in the TSSOP-30 package. This 4-channel configuration matches the ADS7950-Q1/ADS7951-Q1 family members and shares footprint compatibility for design reuse.
What automotive qualification level does the ADS7954QDBTRQ1 meet?
The ADS7954QDBTRQ1 is qualified to AEC-Q100 Grade 1, with guaranteed operation from –40°C to +125°C ambient temperature. It also meets HBM ESD Level H2 (±2 kV) and CDM Level C4B (±500 V), satisfying stringent reliability requirements for powertrain and chassis applications. This qualification is explicitly documented in the SBAS652A datasheet for the ADS7954QDBTRQ1.
Can the ADS7954QDBTRQ1 operate with separate analog and digital supply voltages?
Yes, the ADS7954QDBTRQ1 features independent analog (+VA, pin 29) and digital I/O (+VBD, pin 36) supply rails. +VA accepts 2.7 V to 5.25 V for the SAR core and reference circuitry, while +VBD supports 1.7 V to 5.25 V for logic interface levels. This separation minimizes digital noise coupling into analog measurements and allows flexible integration with mixed-voltage automotive ECUs.
ADS7954QDBTRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 30-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 4
- 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:
- 30-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADS7954QDBTRQ1 FAQ
1.How can I place an order for ADS7954QDBTRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7954QDBTRQ1 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 ADS7954QDBTRQ1 reliable?
The price and inventory of ADS7954QDBTRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7954QDBTRQ1 is usually 5 days.
3.What payment methods are accepted for ADS7954QDBTRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7954QDBTRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7954QDBTRQ1?
ADS7954QDBTRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7954QDBTRQ1 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 ADS7954QDBTRQ1?
For technical support, including ADS7954QDBTRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7954QDBTRQ1 requirements.
6.How does Aetrix verify that ADS7954QDBTRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS7954QDBTRQ1 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 ADS7954QDBTRQ1 meets industry standards.
7.What is the process for return or replacement of ADS7954QDBTRQ1?
All ADS7954QDBTRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7954QDBTRQ1, 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 ADS7954QDBTRQ1 part is unused and in its original packaging.
Return procedure for ADS7954QDBTRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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