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Texas Instruments ADS7959QDBTRQ1
- Part No.:
- ADS7959QDBTRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 30-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS7959QDBTRQ1.pdf
- Description:
- IC ADC 8BIT SAR 30TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,095
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Product details
Overview
ADS7959QDBTRQ1 from Texas Instruments is a 8-bit, 8-channel automotive-grade 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 1.7–5.25 V I/O voltage, enabling direct interfacing with microcontrollers in battery-powered vehicle subsystems.
For engineers reviewing the ADS7959QDBTRQ1 datasheet, ADS7959QDBTRQ1 pinout, ADS7959QDBTRQ1 application, or ADS7959QDBTRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to 125°C), low 1 μA power-down current, TSSOP-30 package footprint compatibility with 4-/8-channel family members, and serial SPI interface with MSB-first data format.
Technical Context
The ADS7959QDBTRQ1 implements a capacitor-based successive approximation register (SAR) architecture with integrated sample-and-hold, supporting auto and manual channel sequencing. Its analog front-end accepts single-ended inputs via an 8-channel multiplexer with high-impedance input structure and selectable full-scale ranges.
Digital control uses a 4-wire SPI interface (CS, SCLK, SDI, SDO) with programmable GPIOs (GPIO0–GPIO3) for alarm signaling and range selection. Alarm logic generates active-high outputs for high/low threshold violations on each channel, with thresholds set via internal registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - delivers 256 distinct output codes for cost-sensitive automotive sensing where high precision is not required. |
| Channel count | 8 single-ended channels - enables monitoring of multiple sensors (e.g., temperature, pressure, position) without external multiplexing. |
| Sample rate | 1 MSPS maximum - supports real-time acquisition of fast transients in motor control or battery management systems. |
| Analog supply range | 2.7 V to 5.25 V - compatible with automotive 3.3 V and 5 V rails and tolerant of battery voltage fluctuations. |
| I/O supply range | 1.7 V to 5.25 V - allows direct connection to 1.8 V, 3.3 V, or 5 V host controllers without level-shifting. |
| Power-down current | 1 μA - extends battery life in always-on vehicle modules such as body control units during sleep mode. |
| Input ranges | SW-selectable 0–2.5 V or 0–5 V - simplifies sensor interface across diverse signal sources (e.g., 0–5 V throttle position vs. 0–2.5 V thermistor divider). |
Pinout & Package
ADS7959QDBTRQ1 is housed in a 30-pin TSSOP package (7.80 mm × 4.40 mm), pin-compatible with other 4- and 8-channel ADS79xx-Q1 devices in the DBT variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP | Analog input positive | Single-ended analog input node connected to internal multiplexer; high-impedance (>1 GΩ) minimizes loading on sensor circuits. |
| CH0–CH7 | Channel select inputs | Digital address lines selecting one of eight analog input channels; driven by host MCU or configured in auto-sequencing mode. |
| GPIO0–GPIO3 | Programmable I/O | Configurable as inputs or outputs; GPIO2 selects input range, GPIO0/GPIO1 indicate high/low alarm status, GPIO3 enables power-down. |
| SDO/SDI/SCLK/CS | SPI interface | Standard 4-wire serial interface operating up to 20 MHz; supports daisy-chaining and interrupt-driven alarm reporting. |
| REFP/REFM | Reference inputs | Accept external 2–3 V reference (e.g., REF5025); REFP sets full-scale, REFM is reference ground-decoupling critical for noise immunity. |
| +VA/AGND | Analog power | Separate analog supply and ground pins reduce digital switching noise coupling into conversion path. |
| +VBD/BDGND | Digital I/O power | Independent digital rail allows mixed-voltage system integration and improves logic noise margin. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation-meets automotive cabin and under-hood thermal requirements without derating. |
| Two programmable alarm levels per channel | Enables autonomous overvoltage/undervoltage detection (e.g., battery voltage monitoring) with interrupt signaling to host MCU. |
| Four individually configurable GPIOs | Eliminates need for external logic or discrete comparators in alarm-driven architectures like HVAC actuator feedback loops. |
| Unipolar input range selection (0–2.5 V / 0–5 V) | Reduces BOM count by supporting both legacy 5 V and modern low-voltage sensors without external gain stages. |
| 1-MSPS throughput with 800 ns conversion time | Meets timing constraints in closed-loop motor control where sub-microsecond sampling latency is critical. |
Applications
| Engine Coolant Temperature Monitoring | Battery Voltage Supervision |
|---|---|
Use Scenario: Continuous measurement of NTC thermistor voltage in engine coolant loop across –40°C to 125°C range. IC Role / Device Role / Timing Role: 8-bit SAR ADC digitizing conditioned analog signal; sequenced auto-scan of CH0–CH2 for coolant, oil, and intake temps. Use Value: 1-MSPS rate captures transient thermal events; programmable alarms trigger immediate ECU response on overtemperature. | Use Scenario: Real-time monitoring of 12 V lead-acid battery voltage in start-stop systems to detect deep discharge or overcharge. IC Role / Device Role / Timing Role: Single-channel ADC with GPIO0 alarm output tied to MCU interrupt pin for fast fault response. Use Value: 0–5 V input range matches battery divider output; 1 μA power-down current preserves battery during vehicle sleep. |
| Body Control Module Sensor Hub | Electric Power Steering Feedback |
Use Scenario: Aggregating signals from door position switches, ambient light, and rain sensors in centralized BCM. IC Role / Device Role / Timing Role: 8-channel multiplexer ADC with GPIO2-controlled range selection adapting to varying sensor output spans. Use Value: TSSOP-30 footprint fits space-constrained PCB layouts; SPI interface reduces MCU pin count versus parallel ADCs. | Use Scenario: Sampling torque sensor and motor phase current feedback in EPS motor control unit. IC Role / Device Role / Timing Role: High-speed ADC acquiring synchronized samples at 1 MSPS for field-oriented control algorithms. Use Value: 800 ns conversion time ensures minimal sampling jitter; AEC-Q100 qualification guarantees reliability in safety-critical steering systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7951QDBTRQ1 | 10-bit resolution, identical 8-channel TSSOP-30 package and pinout | Higher precision required for position sensing or higher-fidelity battery state-of-charge estimation | Select when >8-bit linearity (±0.2 LSB INL) and improved SNR (60 dB vs. 49 dB) are needed without layout change. |
| ADS7950QDBTRQ1 | 12-bit resolution, same package and pinout; higher integral linearity (±0.75 LSB) | Demands highest accuracy in critical subsystems like airbag crash sensors or brake-by-wire feedback | Choose for applications requiring <±1 LSB error budget and full 12-bit dynamic range at 1 MSPS. |
Compared with ADS7951QDBTRQ1 and ADS7950QDBTRQ1, the ADS7959QDBTRQ1 trades resolution for lower cost and reduced processing overhead in non-safety-critical monitoring tasks, while retaining identical automotive qualification, GPIO functionality, and power efficiency.
Availability
ADS7959QDBTRQ1 is available at Aetrix Electronics and suitable for automotive body electronics, battery management systems, and electric power steering modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS7959QDBTRQ1 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-grade ICs and rigorous AEC-Q100 validation processes.
The ADS79xx-Q1 product line was designed specifically for automotive data acquisition in harsh environments, delivering multichannel SAR ADC performance with integrated alarms, GPIOs, and wide supply tolerance to simplify ECU sensor interface design.
FAQ
What is the maximum sampling rate supported by the ADS7959QDBTRQ1?
The ADS7959QDBTRQ1 supports a maximum throughput rate of 1 MSPS (1 million samples per second) when operated with a 20-MHz SCLK. This is achieved with a fixed 800 ns conversion time and 325 ns acquisition time, enabling real-time capture of fast-changing analog signals in automotive control loops without oversampling penalties.
Does the ADS7959QDBTRQ1 require an external reference voltage?
Yes, the ADS7959QDBTRQ1 requires an external reference voltage applied to the REFP pin, with a valid range of 2 V to 3 V (typical 2.5 V). The device uses this reference to define its full-scale input span; REFM must be connected to analog ground. Internal reference is not provided, ensuring flexibility and noise immunity in automotive systems.
How many GPIOs does the ADS7959QDBTRQ1 provide, and what functions can they serve?
The ADS7959QDBTRQ1 provides four programmable GPIOs (GPIO0–GPIO3). GPIO2 selects input range (high = 0–5 V, low = 0–2.5 V), GPIO0 and GPIO1 output active-high alarm signals for high/low threshold violations, and GPIO3 serves as an active-low power-down enable. All are software-configurable via SPI register writes.
Is the ADS7959QDBTRQ1 pin-compatible with other devices in the ADS79xx-Q1 family?
Yes, the ADS7959QDBTRQ1 in the 30-pin TSSOP (DBT) package shares identical pinout with all 4- and 8-channel ADS79xx-Q1 variants-including ADS7950QDBTRQ1, ADS7951QDBTRQ1, ADS7954QDBTRQ1, and ADS7958QDBTRQ1-enabling hardware reuse across resolution grades without PCB redesign.
What automotive qualification does the ADS7959QDBTRQ1 meet?
The ADS7959QDBTRQ1 is qualified to AEC-Q100 Grade 1 standards, with device-level testing confirming operation from –40°C to +125°C ambient temperature, HBM ESD rating of ±2 kV, and CDM ESD rating of ±500 V. This certification validates its suitability for non-safety-critical but thermally demanding automotive applications including body control and powertrain subsystems.
ADS7959QDBTRQ1 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:
- 8
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 8
- 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
ADS7959QDBTRQ1 FAQ
1.How can I place an order for ADS7959QDBTRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7959QDBTRQ1 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 ADS7959QDBTRQ1 reliable?
The price and inventory of ADS7959QDBTRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7959QDBTRQ1 is usually 5 days.
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4.How is shipping managed for ADS7959QDBTRQ1?
ADS7959QDBTRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7959QDBTRQ1 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 ADS7959QDBTRQ1?
For technical support, including ADS7959QDBTRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7959QDBTRQ1 requirements.
6.How does Aetrix verify that ADS7959QDBTRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS7959QDBTRQ1 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 ADS7959QDBTRQ1 meets industry standards.
7.What is the process for return or replacement of ADS7959QDBTRQ1?
All ADS7959QDBTRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7959QDBTRQ1, 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 ADS7959QDBTRQ1 part is unused and in its original packaging.
Return procedure for ADS7959QDBTRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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