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Texas Instruments ADS7958QDBTRQ1
- Part No.:
- ADS7958QDBTRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 30-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS7958QDBTRQ1.pdf
- Description:
- IC ADC 8BIT SAR 30TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,590
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Product details
Overview
ADS7958QDBTRQ1 from Texas Instruments is an automotive-grade 8-bit, 4-channel, 1-MSPS SAR analog-to-digital converter with programmable GPIOs, dual unipolar input ranges (0–2.5 V or 0–5 V), and two per-channel alarm thresholds. It operates from 2.7 V to 5.25 V analog supply and supports 1.7–5.25 V I/O voltage, enabling direct interface with low-voltage microcontrollers in battery-powered vehicle subsystems.
For engineers reviewing the ADS7958QDBTRQ1 datasheet, ADS7958QDBTRQ1 pinout, ADS7958QDBTRQ1 application, or ADS7958QDBTRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to 125°C), 1-μA power-down current, TSSOP-30 package footprint, and integrated multiplexer with high-impedance analog inputs for automotive sensor monitoring.
Technical Context
The ADS7958QDBTRQ1 implements a capacitor-based successive approximation register (SAR) ADC with inherent sample-and-hold, supporting auto/manual channel selection and serial SPI-compatible interface (CS, SCLK, SDI, SDO). Its analog front-end includes a high-impedance multiplexer output (MXO) and dedicated AINP/AINM pins for differential reference configuration.
It features four individually configurable GPIOs (GPIO0–GPIO3), two programmable alarm levels per channel (high/low), and dual selectable unipolar input ranges controlled by GPIO2. The device uses external reference (REFP/REFM) and supports 2–3 V reference voltage with 100-kΩ input resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - Enables cost-sensitive, moderate-accuracy sensing in automotive body electronics and power monitoring. |
| Sample Rate | 1 MSPS - Supports real-time acquisition of fast transients such as battery voltage surges or motor phase currents. |
| Analog Supply Range | 2.7 V to 5.25 V - Compatible with 3.3 V and 5 V automotive rail systems without level-shifting. |
| 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 interface logic. |
| Input Ranges | 0–2.5 V or 0–5 V - Software-selectable via GPIO2 to match sensor output scaling without external gain stages. |
| Power-Down Current | 1 μA - Extends battery life in always-on vehicle modules like door control units or telematics. |
| Operating Temperature | –40°C to 125°C ambient - Meets AEC-Q100 Grade 1 requirements for under-hood and cabin applications. |
Pinout & Package
The ADS7958QDBTRQ1 is housed in a 30-pin TSSOP package (7.80 mm × 4.40 mm) with exposed pad, optimized for automotive PCB thermal management and space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP | Analog Input Positive | Main single-ended analog signal input; high-impedance node referenced to AGND. |
| AINM | Analog Input Negative | Reference ground for differential mode; tied to AGND in unipolar operation. |
| MXO | Multiplexer Output | Output of internal 4-channel analog mux; connects to ADC core input stage. |
| CH0–CH3 | Channel Select Inputs | Digital inputs selecting active analog channel; driven by host or GPIO-controlled logic. |
| GPIO0–GPIO3 | Configurable I/O | Programmable as inputs, outputs, or alarm indicators (e.g., GPIO0 = high-alarm flag). |
| REFP / REFM | Reference Inputs | Accept external precision reference (2–3 V); REFP is positive, REFM is negative reference terminal. |
| CS / SCLK / SDI / SDO | SPI Interface | Standard 4-wire serial interface compatible with automotive microcontroller peripherals. |
| +VA / AGND | Analog Power/Ground | Separate analog supply and ground pins minimize noise coupling into conversion path. |
| +VBD / BDGND | Digital I/O Power/Ground | Isolated digital supply domain enables mixed-voltage system interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | AEC-Q100 Grade 1 certified (–40°C to 125°C), HBM ESD Level H2, CDM Level C4B - Validated for safety-critical vehicle subsystems. |
| Per-Channel Alarm Logic | Two independently programmable thresholds per channel trigger GPIO alarm outputs - Enables autonomous overvoltage/undervoltage detection without host polling. |
| Low-Power Operation | 14.5 mW typical at 1 MSPS (5 V VA), 1 μA power-down - Reduces thermal load and extends runtime in energy-constrained ECUs. |
| Flexible Reference Architecture | External reference input (2–3 V) with 100-kΩ impedance - Supports high-accuracy REF5025 or similar low-drift references for stable conversions. |
| Channel Multiplexing | 4-channel single-ended analog mux with high-impedance inputs - Simplifies multi-sensor designs (e.g., HVAC sensors, battery cell monitors) using one ADC. |
Applications
| Body Control Module (BCM) | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Monitoring interior lighting voltage, door lock actuator current, and window motor position feedback in modern BCMs. IC Role / Device Role / Timing Role: 4-channel ADC digitizes analog sensor signals and provides alarm-triggered GPIO flags for fault reporting. Use Value: Reduces BOM count by consolidating multiple discrete ADCs; 1-MSPS throughput captures transient motor stall events. | Use Scenario: Sampling torque sensor outputs, motor phase currents, and temperature feedback in EPS motor control units. IC Role / Device Role / Timing Role: SAR ADC with 1-μs conversion time delivers timely data for closed-loop torque compensation algorithms. Use Value: Dual input ranges accommodate both low-level torque sensor mV outputs and higher-voltage current shunt signals without external amplifiers. |
| Battery Management Unit (BMU) | Advanced Driver Assistance Systems (ADAS) Power Monitor |
Use Scenario: Measuring individual 12 V battery cell voltages and auxiliary supply rails in start-stop and 48 V mild-hybrid systems. IC Role / Device Role / Timing Role: High-impedance analog inputs prevent loading of high-resistance voltage dividers; alarms flag out-of-spec cells. Use Value: 1 μA power-down current preserves battery charge during vehicle sleep modes while retaining fast wake-up response. | Use Scenario: Real-time monitoring of camera module, radar processor, and sensor fusion SoC supply rails in ADAS domain controllers. IC Role / Device Role / Timing Role: 4-channel ADC samples critical 1.8 V, 3.3 V, and 5 V rails with independent alarm thresholds per rail. Use Value: GPIO alarm outputs drive hardware reset or interrupt lines, enabling sub-millisecond fault response without software overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7950QDBTRQ1 | 12-bit resolution, same 4-channel TSSOP-30 package and pinout; higher INL (±0.75 LSB vs ±0.1 LSB) and SNR (71.7 dB vs 49 dB). | Required where higher accuracy and dynamic range are needed (e.g., precision current sensing), not suitable for cost-optimized 8-bit use cases. | Select ADS7950QDBTRQ1 only when 12-bit resolution and improved linearity justify higher cost and power. |
| ADS7959QDBTRQ1 | 8-bit, 8-channel variant in TSSOP-30; identical electrical specs but doubles channel count; shares same timing and GPIO architecture. | Preferred for systems requiring >4 analog inputs (e.g., multi-zone climate control) without board redesign due to footprint compatibility. | Choose ADS7959QDBTRQ1 when expanding channel count is required and layout reuse is critical. |
Compared with ADS7950QDBTRQ1 and ADS7959QDBTRQ1, the ADS7958QDBTRQ1 offers optimal balance of cost, power, and channel count for entry-level automotive sensor hubs-delivering sufficient 8-bit fidelity while maintaining AEC-Q100 compliance and minimal PCB footprint.
Availability
ADS7958QDBTRQ1 is available at Aetrix Electronics and suitable for automotive body electronics, battery monitoring systems, and electric power steering modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS7958QDBTRQ1 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 electronics and functional safety design.
The ADS79xx-Q1 product line was engineered specifically for automotive sensor signal acquisition-emphasizing AEC-Q100 compliance, low power, integrated alarms, and robust serial interface performance in harsh environments.
FAQ
What is the maximum sampling rate supported by the ADS7958QDBTRQ1?
The ADS7958QDBTRQ1 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 16-clock-cycle conversion time and is guaranteed across the full –40°C to 125°C operating temperature range per the datasheet's timing specifications.
Does the ADS7958QDBTRQ1 require an external reference voltage?
Yes, the ADS7958QDBTRQ1 requires an external reference voltage applied to the REFP and REFM pins. It accepts 2 V to 3 V reference inputs with 100-kΩ input resistance; common choices include the REF5025 (2.5 V) or REF3325. No internal reference is provided, and operation is undefined without a valid external reference.
How many analog input channels does the ADS7958QDBTRQ1 have, and what is their configuration?
The ADS7958QDBTRQ1 has four single-ended analog input channels (CH0–CH3), implemented via an internal analog multiplexer. Each channel connects to the shared AINP input through the MXO node. The device does not support true differential input pairs; all channels are unipolar and share the same input structure.
Can the ADS7958QDBTRQ1 operate with different analog and I/O supply voltages?
Yes, the ADS7958QDBTRQ1 supports independent analog (+VA) and digital I/O (+VBD) supplies. +VA ranges from 2.7 V to 5.25 V for the analog core, while +VBD supports 1.7 V to 5.25 V-enabling direct interfacing with 1.8 V, 3.3 V, or 5 V microcontrollers without level shifters, as confirmed in Section 7.3 of the SBAS652A datasheet.
What GPIO functionality is available on the ADS7958QDBTRQ1?
The ADS7958QDBTRQ1 provides four programmable GPIOs (GPIO0–GPIO3). GPIO0 and GPIO1 serve as dedicated alarm outputs (high/low threshold flags), GPIO2 selects input range (0–2.5 V or 0–5 V), and GPIO3 is a general-purpose power-down control. All can be configured as inputs or outputs via serial command per Section 8.6 of the datasheet.
ADS7958QDBTRQ1 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:
- 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
ADS7958QDBTRQ1 FAQ
1.How can I place an order for ADS7958QDBTRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7958QDBTRQ1 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 ADS7958QDBTRQ1 reliable?
The price and inventory of ADS7958QDBTRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7958QDBTRQ1 is usually 5 days.
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4.How is shipping managed for ADS7958QDBTRQ1?
ADS7958QDBTRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7958QDBTRQ1 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 ADS7958QDBTRQ1?
For technical support, including ADS7958QDBTRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7958QDBTRQ1 requirements.
6.How does Aetrix verify that ADS7958QDBTRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS7958QDBTRQ1 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 ADS7958QDBTRQ1 meets industry standards.
7.What is the process for return or replacement of ADS7958QDBTRQ1?
All ADS7958QDBTRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7958QDBTRQ1, 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 ADS7958QDBTRQ1 part is unused and in its original packaging.
Return procedure for ADS7958QDBTRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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