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Texas Instruments ADS1120QPWRQ1
- Part No.:
- ADS1120QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS1120QPWRQ1.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,883
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Product details
Overview
ADS1120QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, 16-bit, 2-kSPS delta-sigma ADC with integrated PGA (gain 1–128), dual programmable current sources (50 µA to 1.5 mA), internal 2.048 V reference (5 ppm/°C drift), and SPI interface. It supports two differential or four single-ended inputs and delivers 16-bit noise-free resolution at 20 SPS for high-accuracy sensor signal acquisition in battery management and RTD-based temperature monitoring.
For engineers reviewing the ADS1120QPWRQ1 datasheet, ADS1120QPWRQ1 pinout, ADS1120QPWRQ1 application, or ADS1120QPWRQ1 equivalent, this page provides verified technical context, real-world design meaning of key specs, TSSOP-16 package mapping, functional alternatives, and automotive-grade supply chain support - all grounded in TI's SBAS683C production data sheet.
Technical Context
The ADS1120QPWRQ1 implements a delta-sigma modulator with single-cycle settling and a programmable digital filter enabling simultaneous 50 Hz and 60 Hz rejection at 20 SPS. Its flexible MUX routes up to four analog inputs to a low-noise PGA or bypass path, supporting both pseudo-differential and fully differential measurement topologies.
Integrated features include dual matched IDACs for 2-/3-/4-wire RTD excitation, a precision internal temperature sensor (±0.5°C accuracy), low-side power switch (RON = 3.5 Ω), and internal oscillator (±1% accuracy). All operate across –40°C to +125°C with AVDD/DVDD supply range of 2.3 V to 5.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes; guarantees monotonicity and full-scale linearity for precision sensor digitization. |
| Data Rate | Up to 2 kSPS in turbo mode; enables real-time monitoring of fast-changing automotive sensor signals. |
| PGA Gain Range | 1 to 128; allows direct interface to microvolt-level outputs from thermocouples and bridge sensors without external amplification. |
| Reference Drift | 5 ppm/°C (typical); ensures stable 2.048 V reference over full automotive temperature range, minimizing calibration burden. |
| INL Error | ±20 ppm FS (max); corresponds to <0.0003% full-scale error - critical for high-fidelity RTD and strain gauge measurements. |
| Current Sources | 50 µA to 1.5 mA, ±6% accuracy; supports accurate 2-/3-/4-wire RTD biasing with <0.3% matching between IDACs. |
| Temp Sensor Accuracy | ±0.5°C over –40°C to +125°C; enables on-chip system thermal monitoring without external sensor. |
Pinout & Package
TSSOP-16 package (5 mm × 6.4 mm), lead pitch 0.65 mm, RoHS-compliant, specified for –40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCLK | Digital input | SPI serial clock; supports mode 1 timing with min 150 ns period for reliable host synchronization. |
| 2 CS | Digital input | Active-low chip select; tied to DGND if unused, enabling single-device SPI bus simplicity. |
| 6 AIN3/REFN1 | Analog input / ref negative | Shared terminal for analog input 3 or REFN1; internal low-side switch connects to AVSS for RTD 3-wire compensation. |
| 9 REFP0 | Analog input | Positive reference input 0; accepts 0.75 V to (AVDD – AVSS) × 2.5 V for flexible ratiometric or absolute measurements. |
| 11 AIN0/REFP1 | Analog input / ref positive | Shared terminal for analog input 0 or REFP1; enables dual-reference configuration or simplified single-ended input routing. |
| 14 DRDY | Digital output | Active-low data ready flag; indicates conversion completion and supports interrupt-driven firmware polling. |
| 15 DOUT/DRDY | Digital output | Combined SPI data output and DRDY signal; reduces pin count while maintaining synchronous read capability. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 50/60 Hz rejection | At 20 SPS with single-cycle settling - eliminates mains interference in noisy vehicle cabin or under-hood environments without external filtering. |
| Internal low-drift oscillator | ±1% accuracy over temperature - removes need for external crystal, reducing BOM cost and PCB area in space-constrained modules. |
| Bypassable PGA | Configurable gain 1–4 without PGA enabled - preserves high input impedance (>10 GΩ) for direct connection to high-Z sensors like thermistors. |
| Functional safety documentation | TI-provided FIT rate, failure modes, and diagnostic coverage data - accelerates ISO 26262 ASIL-B system certification efforts. |
| Low-power duty-cycle mode | 120 µA typical current draw with PGA disabled - extends battery life in always-on automotive monitoring nodes. |
Applications
| Battery Management System | Automotive RTD Temperature Monitoring |
|---|---|
|
Use Scenario: High-accuracy voltage and current sensing in 12 V/48 V hybrid battery packs with cell balancing and thermal runaway prevention. IC Role / Device Role / Timing Role: Primary ADC digitizing shunt voltage, pack voltage, and thermistor/RTD feedback with synchronized sampling and 20 SPS noise rejection. Use Value: Enables <±1 mV voltage measurement and <±0.2°C temperature resolution using internal reference and PGA - eliminating external precision references and op-amps. |
Use Scenario: Real-time temperature profiling of engine coolant, transmission oil, and cabin air using 3-wire Pt100/1000 RTDs. IC Role / Device Role / Timing Role: Integrated excitation current source drives RTD; PGA amplifies small ΔR signals; digital filter rejects engine EMI and alternator ripple. Use Value: Single-chip solution replaces discrete IDAC + instrumentation amp + reference + ADC - reducing layout complexity and improving long-term drift stability. |
| K-Type Thermocouple Interface | Strain Gauge / Pressure Sensor Signal Chain |
|
Use Scenario: Exhaust gas temperature (EGT) monitoring from –200°C to +1250°C in diesel aftertreatment systems. IC Role / Device Role / Timing Role: Measures thermocouple output referenced to isothermal block; uses internal temp sensor for cold-junction compensation. Use Value: Achieves ±1.5°C total system accuracy (thermocouple + ADC + CJC) without external amplifiers or dedicated CJC ICs. |
Use Scenario: Tire pressure monitoring (TPMS) and brake pressure sensing using silicon piezoresistive bridges. IC Role / Device Role / Timing Role: Digitizes low-mV full-bridge outputs; PGA gain up to 128 compensates for low bridge excitation; IDACs enable ratiometric excitation. Use Value: Delivers 16-bit noise-free resolution at 20 SPS - sufficient for <0.1%FS pressure accuracy in harsh automotive vibration environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1220IPWR | 24-bit resolution, same PGA (1–128), identical TSSOP-16 package, but non-automotive grade (no AEC-Q100). | Lacks automotive qualification and functional safety documentation - suitable for industrial or consumer designs where ASIL compliance is not required. | Select ADS1220IPWR only when higher resolution is prioritized over automotive qualification and safety certification support. |
| ADS112U04IPWR | UART interface instead of SPI; includes onboard UART transceiver; same 16-bit resolution and PGA, but no internal oscillator or temperature sensor. | Designed for microcontroller-less sensor nodes; eliminates need for host MCU SPI driver but adds UART protocol overhead and reduces configurability. | Choose ADS112U04IPWR when integrating into simple remote sensors without a host processor, accepting trade-offs in flexibility and diagnostics. |
Compared with ADS1120QPWRQ1, ADS1220IPWR offers higher resolution but lacks AEC-Q100 qualification and safety documentation, while ADS112U04IPWR trades SPI configurability and on-chip diagnostics for UART simplicity - making ADS1120QPWRQ1 the optimal choice for ASIL-B automotive sensor nodes requiring integrated PGA, IDACs, and functional safety support.
Availability
ADS1120QPWRQ1 is available at Aetrix Electronics and suitable for battery management systems, automotive RTD temperature monitoring, and exhaust gas temperature sensing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS1120QPWRQ1 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 decades of automotive IC development and AEC-Q100 qualification expertise.
The ADS1120-Q1 belongs to TI's precision automotive ADC product line, designed specifically for high-reliability sensor signal conditioning in battery management, thermal monitoring, and emissions control systems.
FAQ
What is the operating temperature range of the ADS1120QPWRQ1?
The ADS1120QPWRQ1 is qualified per AEC-Q100 Grade 1 with an operating ambient temperature range of –40°C to +125°C. This specification is guaranteed across all electrical parameters in the datasheet, including INL, offset drift, and reference stability - making it suitable for under-hood and powertrain applications where thermal stress is extreme.
Does the ADS1120QPWRQ1 support 3-wire RTD measurements?
Yes, the ADS1120QPWRQ1 supports 3-wire RTD measurements via its internal low-side power switch connected to pin AIN3/REFN1 and dual programmable current sources. When configured with one IDAC sourcing current through the RTD and the second IDAC sinking current through the lead wire, the device enables automatic lead resistance cancellation - a core requirement for high-accuracy 3-wire Pt100 implementations.
Can the ADS1120QPWRQ1 operate without an external reference?
Yes, the ADS1120QPWRQ1 includes an internal 2.048 V reference with 5 ppm/°C typical drift and ±0.15% initial accuracy. It can be used directly for ratiometric or absolute measurements, eliminating the need for external reference ICs in most automotive sensor applications - though external references remain supported via REFP0/REFN0 pins for enhanced stability.
What SPI modes does the ADS1120QPWRQ1 support?
The ADS1120QPWRQ1 supports SPI Mode 1 (CPOL = 0, CPHA = 1), where data is sampled on the rising edge of SCLK and shifted out on the falling edge. Its timing requirements - including 150 ns minimum SCLK period and 50 ns CS-to-SCLK setup - are fully compatible with standard ARM Cortex-M and automotive MCU SPI peripherals without custom timing adjustments.
Is functional safety documentation available for the ADS1120QPWRQ1?
Yes, Texas Instruments provides functional safety documentation for the ADS1120QPWRQ1, including FIT rate calculation, failure mode analysis, and diagnostic coverage metrics aligned with ISO 26262. This documentation is publicly accessible via TI's product folder and supports ASIL-B system-level safety case development for automotive applications.
ADS1120QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 2k
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External, Internal, Supply
- Voltage - Supply, Analog:
- 2.3V ~ 5.5V
- Voltage - Supply, Digital:
- 2.3V ~ 5.5V
- Features:
- PGA, Temperature Sensor
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADS1120QPWRQ1 FAQ
1.How can I place an order for ADS1120QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1120QPWRQ1 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 ADS1120QPWRQ1 reliable?
The price and inventory of ADS1120QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1120QPWRQ1 is usually 5 days.
3.What payment methods are accepted for ADS1120QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1120QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1120QPWRQ1?
ADS1120QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1120QPWRQ1 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 ADS1120QPWRQ1?
For technical support, including ADS1120QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1120QPWRQ1 requirements.
6.How does Aetrix verify that ADS1120QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS1120QPWRQ1 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 ADS1120QPWRQ1 meets industry standards.
7.What is the process for return or replacement of ADS1120QPWRQ1?
All ADS1120QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1120QPWRQ1, 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 ADS1120QPWRQ1 part is unused and in its original packaging.
Return procedure for ADS1120QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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