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Texas Instruments ADS1000A1QDBVRQ1
- Part No.:
- ADS1000A1QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
ADS1000A1QDBVRQ1.pdf
- Description:
- IC ADC 12BIT SIGMA-DELTA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,419
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Product details
Overview
ADS1000A1QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, 12-bit delta-sigma analog-to-digital converter with differential inputs, I²C interface, programmable gain amplifier (1×–8×), 128 SPS data rate, and 90 μA active supply current - designed for precision sensing in space-constrained battery management and emissions monitoring systems.
For engineers reviewing the ADS1000A1QDBVRQ1 datasheet, ADS1000A1QDBVRQ1 pinout, ADS1000A1QDBVRQ1 application, or ADS1000A1QDBVRQ1 equivalent, key selection criteria include its ratiometric operation using VDD as reference, single-cycle conversion capability, SOT-23-6 package footprint, and dual factory-programmed I²C addresses (1001000b / 1001001b) enabling multi-device bus configuration.
Technical Context
The ADS1000A1QDBVRQ1 integrates a switched-capacitor delta-sigma ADC core, on-chip clock generator (no external clock support), and I²C target-only interface. Its differential input stage provides 2.4 MΩ / PGA differential impedance and 8 MΩ common-mode impedance, with ratiometric conversion referenced to VDD (2.7 V–5.5 V).
It operates in two functional modes: continuous conversion (ST/BSY always reads 1) or single conversion (ST/BSY toggles, auto-power-down post-conversion). The configuration register (default 0x80) controls mode (SC bit), PGA gain (PGA[1:0]), and conversion status (ST/BSY bit), with output delivered in signed 12-bit two's-complement format right-justified in a 16-bit register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - ensures monotonicity and full-scale linearity for sensor signal digitization. |
| Data Rate | 128 SPS nominal - optimized for low-noise, high-precision DC/low-frequency measurements (e.g., gas sensor outputs). |
| INL | ±1 LSB max - guarantees ≤0.024% full-scale error across temperature (–40°C to +125°C), critical for calibration-sensitive BMS. |
| Supply Current | 90 μA active, 0.05–2 μA power-down - enables ultra-low-power operation in always-on automotive subsystems. |
| PGA Gain | Selectable 1×, 2×, 4×, or 8× - extends effective input range down to ±VDD/8, supporting mV-level signals from lambda or NOx sensors. |
| I²C Address | Factory-set 1001000b or 1001001b - allows two devices on same bus without address conflict; marked BD0/BD1 on package. |
| Operating Temp | –40°C to +125°C (Grade 1) - qualified per AEC-Q100 for under-hood and powertrain applications. |
Pinout & Package
SOT-23-6 (DBV) package: 2.9 mm × 2.8 mm footprint, surface-mount, thermally enhanced for automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+ | Positive differential analog input | Accepts rail-to-rail input up to VDD + 0.2 V; used with VIN– for true differential measurement. |
| VIN– | Negative differential analog input | Completes differential pair; common-mode voltage must stay within GND – 0.2 V to VDD + 0.2 V. |
| GND | Analog and digital ground reference | Single ground pin serves both domains; requires low-impedance connection to system AGND plane. |
| SCL | I²C serial clock input | Controller-driven clock line (max 3.4 MHz); ADS1000A1QDBVRQ1 never drives SCL - target-only operation. |
| SDA | I²C bidirectional data line | Open-drain I/O; requires external pull-up; supports standard/fast/high-speed I²C modes with ACK/NACK protocol. |
| VDD | Power supply input | 2.7 V–5.5 V single supply; also serves as ratiometric reference - eliminates need for external voltage reference. |
Key Features
| Feature | Design Value |
|---|---|
| Ratiometric operation | Uses VDD as conversion reference - removes dependency on external reference IC, reducing BOM count and layout complexity. |
| Single-cycle conversion | Completes conversion in one data cycle (7.8 ms at 128 SPS) - enables deterministic timing for time-critical sensor polling. |
| Auto power-down | Enters ultra-low-power state (<2 μA) automatically after each conversion in single mode - ideal for intermittent wake-up architectures. |
| Dual I²C addresses | Two factory-configured addresses (1001000b / 1001001b) - permits direct daisy-chaining of two ADS1000A1QDBVRQ1 units on one bus without address translation. |
| AEC-Q100 Grade 1 | Qualified for –40°C to +125°C ambient operation - meets automotive reliability and lifetime requirements for head units and inverters. |
Applications
| Automotive Battery Management | Exhaust Gas Emissions Monitoring |
|---|---|
Use Scenario: Measuring cell voltage and temperature in 12 V auxiliary battery packs for start-stop systems. IC Role / Device Role / Timing Role: Precision 12-bit ADC digitizing mV-level shunt voltage drops and thermistor outputs via PGA gain scaling. Use Value: 90 μA active current and auto power-down extend microcontroller sleep duration, reducing system quiescent power by >30% vs. legacy 16-bit converters. |
Use Scenario: Reading output signals from O₂ (lambda) and NOₓ sensors in diesel exhaust aftertreatment systems. IC Role / Device Role / Timing Role: Differential ratiometric ADC converting low-amplitude sensor outputs (±50 mV) with 8× PGA gain and 128 SPS filtering. Use Value: ±1 LSB INL ensures <0.1% full-scale error over temperature - meets OEM calibration traceability requirements for emissions compliance reporting. |
| Onboard EV Charger Sensing | HEV/EV Inverter Current Feedback |
Use Scenario: Monitoring input AC line voltage and DC link voltage in compact onboard chargers. IC Role / Device Role / Timing Role: High-accuracy, isolated-signal ADC capturing scaled AC/DC voltages with minimal external components. Use Value: SOT-23-6 footprint saves >60% board area vs. SOIC-8 alternatives - critical for high-density charger PCBs with tight thermal constraints. |
Use Scenario: Digitizing current-sense amplifier outputs for phase-leg current control in traction inverters. IC Role / Device Role / Timing Role: Low-latency 128 SPS ADC providing synchronized feedback to MCU PWM controllers. Use Value: Single-cycle conversion and deterministic 7.8 ms timing enable precise current loop alignment - reduces torque ripple in motor control algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit automotive ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1100A1QDBVRQ1 | 16-bit resolution, 128 SPS, same PGA and I²C interface; 250 μA active current; larger offset drift (±5 μV/°C vs. ±1.5 μV/°C). | Better resolution for high-precision BMS voltage monitoring but higher power and less suitable for ultra-low-power gas sensing. | Choose ADS1100A1QDBVRQ1 only when 16-bit resolution is mandatory and power budget allows +160 μA increase. |
| MCP3421A0T-E/CH | 18-bit delta-sigma ADC, 15 SPS max, I²C interface, no PGA, 2.7–5.5 V supply; not AEC-Q100 qualified. | Lacks automotive qualification and programmable gain - requires external signal conditioning for low-level sensors. | Use MCP3421A0T-E/CH only in non-automotive industrial designs where AEC-Q100 is not required and lower speed is acceptable. |
Compared with ADS1100A1QDBVRQ1 and MCP3421A0T-E/CH, the ADS1000A1QDBVRQ1 uniquely balances AEC-Q100 Grade 1 compliance, 12-bit precision, ultra-low 90 μA power, integrated PGA, and SOT-23-6 size - making it the optimal choice for cost- and space-constrained automotive sensing nodes requiring guaranteed automotive reliability.
Availability
ADS1000A1QDBVRQ1 is available at Aetrix Electronics and suitable for automotive head units, battery management systems, and emissions sensor modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS1000A1QDBVRQ1 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, embedded processing, and connectivity technologies, with decades of automotive-grade product development and manufacturing expertise.
The ADS1000-Q1 product line delivers highly integrated, low-power, AEC-Q100-qualified delta-sigma ADCs for automotive sensor signal acquisition - targeting applications where small size, low power, and guaranteed reliability outweigh raw resolution demands.
FAQ
What is the I²C address configuration for ADS1000A1QDBVRQ1?
The ADS1000A1QDBVRQ1 has a factory-programmed 7-bit I²C address: either 1001000b (0x48) or 1001001b (0x49), determined by orderable suffix A0 or A1. Devices are marked BD0 or BD1 on the SOT-23-6 package. No software configuration is possible - address is hardwired at manufacture. Both variants support standard, fast, and high-speed I²C modes, and the ADS1000A1QDBVRQ1 responds only to its assigned address.
Does ADS1000A1QDBVRQ1 require an external voltage reference?
No, the ADS1000A1QDBVRQ1 uses ratiometric conversion with VDD as the reference voltage. This eliminates the need for an external precision reference IC, simplifying design and reducing bill-of-materials cost. Input full-scale range is ±VDD / PGA, so accuracy directly tracks VDD stability - making it well-suited for systems with tightly regulated 3.3 V or 5 V rails.
How does the programmable gain amplifier (PGA) affect input range in ADS1000A1QDBVRQ1?
The PGA in ADS1000A1QDBVRQ1 offers selectable gains of 1, 2, 4, or 8 via bits [1:0] in the configuration register. With gain = 8, the full-scale differential input range becomes ±VDD/8 - e.g., ±625 mV at VDD = 5 V. This enables high-resolution digitization of low-amplitude sensor signals (e.g., oxygen sensor outputs) without external amplification, preserving SNR and minimizing noise pickup.
Can ADS1000A1QDBVRQ1 operate with an external clock source?
No, the ADS1000A1QDBVRQ1 contains an internal clock generator and does not accept an external clock. Its conversion timing is derived from an on-chip oscillator nominally operating at ~275 kHz, which varies with supply voltage and temperature. Data rate remains fixed at 128 SPS across conditions - no external timing components or clock routing are required, simplifying layout and improving robustness in noisy automotive environments.
What is the meaning of "single-cycle conversion" for ADS1000A1QDBVRQ1?
"Single-cycle conversion" means the ADS1000A1QDBVRQ1 completes one full ADC conversion - including sampling, integration, and digital output - in exactly one data cycle (7.8 ms at 128 SPS). In single-conversion mode, it powers up, performs that single conversion, places the result in the output register, clears the ST/BSY bit, and powers down. This deterministic behavior enables precise timing control and ultra-low average current in duty-cycled sensor systems.
ADS1000A1QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 128
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- PGA-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- PGA, Selectable Address
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- SOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADS1000A1QDBVRQ1 FAQ
1.How can I place an order for ADS1000A1QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1000A1QDBVRQ1 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 ADS1000A1QDBVRQ1 reliable?
The price and inventory of ADS1000A1QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1000A1QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for ADS1000A1QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1000A1QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1000A1QDBVRQ1?
ADS1000A1QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1000A1QDBVRQ1 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 ADS1000A1QDBVRQ1?
For technical support, including ADS1000A1QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1000A1QDBVRQ1 requirements.
6.How does Aetrix verify that ADS1000A1QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS1000A1QDBVRQ1 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 ADS1000A1QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of ADS1000A1QDBVRQ1?
All ADS1000A1QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1000A1QDBVRQ1, 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 ADS1000A1QDBVRQ1 part is unused and in its original packaging.
Return procedure for ADS1000A1QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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