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Texas Instruments ADS7961QDBTRQ1
- Part No.:
- ADS7961QDBTRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS7961QDBTRQ1.pdf
- Description:
- IC ADC 8BIT SAR 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,497
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Product details
Overview
ADS7961QDBTRQ1 from Texas Instruments is a 8-bit, 16-channel automotive-grade SAR ADC with 1-MSPS throughput, 2.7–5.25 V analog supply, dual unipolar input ranges (0–2.5 V / 0–5 V), and four programmable GPIOs. It integrates a high-impedance multiplexer output (MXO), two per-channel alarm thresholds, and operates from –40°C to 125°C for battery monitoring in EV powertrain control units.
For engineers reviewing the ADS7961QDBTRQ1 datasheet, ADS7961QDBTRQ1 pinout, ADS7961QDBTRQ1 application, or ADS7961QDBTRQ1 equivalent, key selection criteria include channel count, automotive AEC-Q100 Grade 1 qualification, GPIO configurability, alarm threshold programming, and TSSOP-38 package compatibility with isolated signal acquisition systems.
Technical Context
The ADS7961QDBTRQ1 implements a capacitor-based successive approximation register (SAR) architecture with inherent sample-and-hold, supporting auto/manual channel sequencing and simultaneous alarm monitoring across all 16 inputs. Its digital interface uses SPI-compatible 4-wire serial protocol (CS, SCLK, SDI, SDO) with MSB-first data format and programmable timing alignment.
It features dual selectable input ranges via GPIO2, independent per-channel high/low alarm registers (0x00–0xFF), and GPIO0–GPIO3 configurable as inputs, outputs, or alarm indicators. Power management includes 1 μA power-down mode and fast 1 μs wake-up time, optimized for intermittent sensing in low-power automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes suitable for cost-sensitive automotive sensor monitoring where high precision is not required. |
| Channel count | 16 single-ended channels - enables consolidated acquisition from multiple voltage rails, temperature sensors, or position feedback signals in ECUs. |
| Sample rate | 1 MSPS maximum - supports real-time sampling of fast transients such as battery cell voltage spikes during regenerative braking. |
| Analog supply range | 2.7 V to 5.25 V - compatible with both 3.3 V and 5 V automotive domains without external level-shifting. |
| I/O supply range | 1.7 V to 5.25 V - allows direct interfacing with 1.8 V, 3.3 V, or 5 V host microcontrollers. |
| Input ranges | SW-selectable 0–2.5 V or 0–5 V - simplifies design across mixed-signal sources (e.g., 2.5 V reference sensors and 5 V analog outputs). |
| Power-down current | 1 μA - enables ultra-low quiescent operation during sleep cycles in always-on vehicle modules. |
Pinout & Package
ADS7961QDBTRQ1 is housed in a 38-pin TSSOP package (9.70 mm × 4.40 mm), qualified for automotive PCB assembly and thermal cycling per AEC-Q100.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH15 | Analog input channel | 16 single-ended analog inputs; each routed through internal multiplexer to ADC core based on channel select register. |
| AINP | ADC analog input | Main signal path into SAR core; accepts multiplexed output from CHn or external signal when MXO is bypassed. |
| MXO | Multiplexer output | Buffered analog output of selected channel; usable for external PGA or oscilloscope probing without loading the input. |
| REFP / REFM | Reference input | Differential reference inputs accepting 2–3 V external reference (e.g., REF5025); sets full-scale span for conversion. |
| CS / SCLK / SDI / SDO | SPI interface | 4-wire serial interface compliant with standard SPI timing; CS active-low enables frame synchronization. |
| GPIO0–GPIO3 | Programmable I/O | Configurable via register: GPIO0/GPIO1 serve as alarm flags; GPIO2 selects input range; GPIO3 enters power-down mode. |
| +VA / AGND | Analog power domain | Separate analog supply and ground pins minimize noise coupling from digital switching into sensitive ADC front-end. |
| +VBD / BDGND | Digital I/O supply | Independent digital rail decouples logic-level signaling from analog section, enabling mixed-voltage system integration. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Rated for –40°C to +125°C ambient operation with HBM ESD Level H2 and CDM Level C4B - meets automotive electronics reliability requirements. |
| Per-channel alarm monitoring | Two independently programmable 8-bit thresholds per channel (0x00–0xFF) enable autonomous overvoltage/undervoltage detection without host CPU intervention. |
| Four configurable GPIOs | GPIO0–GPIO3 support input, output, or dedicated alarm flag modes - reduces need for external logic or interrupt controllers in compact ECU designs. |
| SW-selectable input ranges | GPIO2 toggles between 0–2.5 V and 0–5 V full-scale spans - eliminates external resistor dividers for multi-range sensor interfaces. |
| 1-MSPS throughput with 1 μs wake-up | Full-speed conversion achievable within 1 μs after exit from 1 μA power-down state - ideal for burst-mode battery cell monitoring. |
Applications
| Battery Cell Voltage Monitoring | EV Onboard Charger Control |
|---|---|
Use Scenario: Real-time acquisition of 16-series lithium-ion cell voltages during charging/discharging cycles. IC Role / Device Role / Timing Role: 16-channel analog front-end digitizing individual cell potentials at ≤1 MSPS with autonomous high/low alarm triggering. Use Value: Enables precise cell balancing decisions using on-chip alarm flags, reducing host MCU polling overhead and improving response latency to fault conditions. |
Use Scenario: Monitoring AC input voltage, DC bus voltage, temperature sensors, and gate driver feedback in bidirectional OBC topologies. IC Role / Device Role / Timing Role: Centralized analog monitor providing synchronized 16-channel sampling for closed-loop regulation and safety interlocks. Use Value: Single-chip consolidation replaces multiple discrete ADCs and GPIO expanders, lowering BOM count and PCB area in space-constrained OBC modules. |
| Automotive HVAC Blower Control | 12 V System Power Rail Diagnostics |
Use Scenario: Acquisition of motor current sense, thermistor readings, Hall-effect rotor position, and supply voltage in brushless blower motor drives. IC Role / Device Role / Timing Role: Multichannel sensor hub interfacing with motor control MCU via SPI, delivering time-aligned samples for field-oriented control algorithms. Use Value: Integrated alarm thresholds detect overcurrent or overtemperature events faster than software-based checks, enhancing functional safety compliance. |
Use Scenario: Continuous monitoring of 12 V battery voltage, alternator output, fuse health, and load-dump transients in body control modules. IC Role / Device Role / Timing Role: High-reliability ADC capturing rail integrity metrics with automotive-grade temperature stability and ESD robustness. Use Value: AEC-Q100 qualification and 125°C operation ensure consistent performance under hood temperature extremes, eliminating derating concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953QDBTRQ1 | 12-bit resolution, 16-channel, same TSSOP-38 package and pinout - higher precision but lower SNR (71.7 dB vs 49 dB) and higher power (2.3 mA vs 1.8 mA at 5 V). | Preferred where sub-LSB accuracy is required for current shunt measurement or high-fidelity sensor fusion. | Select ADS7953QDBTRQ1 only if 12-bit resolution and improved INL (±0.75 LSB) justify increased cost and power budget. |
| ADS7960QDBTRQ1 | 8-bit, 12-channel, TSSOP-38 package - identical resolution and power profile but lacks CH12–CH15 and associated GPIO routing flexibility. | Suitable for simplified architectures with ≤12 analog sources and no requirement for full 16-channel alarm coverage. | Choose ADS7960QDBTRQ1 when channel count can be reduced and board layout re-use of ADS7961QDBTRQ1 footprint is acceptable. |
Compared with ADS7953QDBTRQ1 and ADS7960QDBTRQ1, the ADS7961QDBTRQ1 uniquely balances 16-channel density, automotive qualification, alarm autonomy, and minimal power consumption - making it optimal for cost-sensitive, high-channel-count diagnostics where 8-bit resolution suffices.
Availability
ADS7961QDBTRQ1 is available at Aetrix Electronics and suitable for automotive battery management, onboard charger control, and HVAC blower motor monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS7961QDBTRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive, industrial, and power management ICs.
The ADS79xx-Q1 product line delivers multichannel, micropower SAR ADCs designed specifically for automotive signal acquisition - emphasizing AEC-Q100 compliance, integrated alarm logic, and flexible I/O supply operation in harsh environments.
FAQ
What is the maximum sample rate supported by the ADS7961QDBTRQ1?
The ADS7961QDBTRQ1 supports a maximum throughput rate of 1 MSPS when operated with a 20-MHz SCLK. This is achieved with 800 ns conversion time and 325 ns acquisition time, enabling real-time capture of fast-changing analog signals such as battery voltage transients in electric vehicles. The ADS7961QDBTRQ1 maintains this rate across its full operating temperature range of –40°C to 125°C.
Does the ADS7961QDBTRQ1 require an external reference voltage?
Yes, the ADS7961QDBTRQ1 requires an external reference voltage applied to the REFP and REFM pins. It accepts 2 V to 3 V reference inputs, with typical operation at 2.5 V (e.g., using REF5025). The device does not include an internal reference, so accuracy and noise performance depend directly on the quality and stability of the external reference source used with the ADS7961QDBTRQ1.
How are the GPIO pins configured on the ADS7961QDBTRQ1?
The ADS7961QDBTRQ1 provides four GPIOs (GPIO0–GPIO3) that are programmable via internal registers. GPIO0 and GPIO1 function as active-high alarm indicators; GPIO2 selects input range (high = 0–5 V, low = 0–2.5 V); GPIO3 serves as active-low power-down control. Configuration is performed through SPI writes to dedicated GPIO control registers, and no external pull resistors are required for default functionality of the ADS7961QDBTRQ1.
What package type and dimensions does the ADS7961QDBTRQ1 use?
The ADS7961QDBTRQ1 is packaged in a 38-pin TSSOP (DBT) with body dimensions of 9.70 mm × 4.40 mm. This RoHS-compliant, surface-mount package supports automated PCB assembly and meets AEC-Q100 mechanical stress requirements. Pin pitch is 0.5 mm, and the package includes exposed thermal pad connections for enhanced thermal dissipation in high-temperature automotive applications using the ADS7961QDBTRQ1.
Is the ADS7961QDBTRQ1 pin-compatible with other devices in the ADS79xx-Q1 family?
The ADS7961QDBTRQ1 shares the same 38-pin TSSOP (DBT) footprint with ADS7952-Q1, ADS7953-Q1, ADS7956-Q1, ADS7957-Q1, and ADS7960-Q1. However, pin functions differ across variants - for example, CH12–CH15 are no-connect on ADS7960-Q1 but active inputs on ADS7961QDBTRQ1. Therefore, while PCB layout can be reused, register mapping, alarm functionality, and channel routing must be verified per device before substitution of the ADS7961QDBTRQ1.
ADS7961QDBTRQ1 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:
- 8
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 16
- 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
ADS7961QDBTRQ1 FAQ
1.How can I place an order for ADS7961QDBTRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7961QDBTRQ1 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 ADS7961QDBTRQ1 reliable?
The price and inventory of ADS7961QDBTRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7961QDBTRQ1 is usually 5 days.
3.What payment methods are accepted for ADS7961QDBTRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7961QDBTRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7961QDBTRQ1?
ADS7961QDBTRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7961QDBTRQ1 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 ADS7961QDBTRQ1?
For technical support, including ADS7961QDBTRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7961QDBTRQ1 requirements.
6.How does Aetrix verify that ADS7961QDBTRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS7961QDBTRQ1 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 ADS7961QDBTRQ1 meets industry standards.
7.What is the process for return or replacement of ADS7961QDBTRQ1?
All ADS7961QDBTRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7961QDBTRQ1, 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 ADS7961QDBTRQ1 part is unused and in its original packaging.
Return procedure for ADS7961QDBTRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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