Texas Instruments ADS1000A0QDBVRQ1

Overview

ADS1000A0QDBVRQ1 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 ADS1000A0QDBVRQ1 datasheet, ADS1000A0QDBVRQ1 pinout, ADS1000A0QDBVRQ1 application, or ADS1000A0QDBVRQ1 equivalent, key selection criteria include its ratiometric operation using VDD as reference, single-cycle conversion timing, SOT-23-6 package footprint, and dual factory-set I²C addresses (1001000b / 1001001b) enabling multi-device bus configuration.

Technical Context

The ADS1000A0QDBVRQ1 integrates a switched-capacitor delta-sigma ADC core, on-chip clock generator (no external clock support), and I²C target-only interface - all operating from a single 2.7 V to 5.5 V supply. Its ratiometric architecture ties full-scale input range directly to VDD, eliminating need for external voltage reference.

It supports two functional modes: continuous conversion (ST/BSY always reads 1) and single conversion (ST/BSY toggles 1→0 post-conversion with automatic power-down). The PGA's four gain settings (1, 2, 4, 8) scale differential input range to ±VDD/PGA, enabling sub-millivolt signal resolution without external amplification.

Key Specifications

Pinout & Package

SOT-23-6 (DBV) package: 2.9 mm × 2.8 mm footprint with gull-wing leads - optimized for automated placement and high-density automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit automotive ADC applications.

Compared with ADS1100QDBVRQ1 and MCP3421-E/MS, the ADS1000A0QDBVRQ1 uniquely balances AEC-Q100 compliance, integrated PGA, ultra-low power, and compact SOT-23-6 packaging - making it the optimal choice for volume automotive sensing where gain adaptability and footprint efficiency are prioritized over maximum bit depth.

Availability

ADS1000A0QDBVRQ1 is available at Aetrix Electronics and suitable for automotive head units, battery management systems, and onboard chargers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADS1000A0QDBVRQ1 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 automotive ICs - with decades of experience delivering high-reliability components for safety-critical vehicle systems.

The ADS1000-Q1 product line delivers automotive-qualified, low-power delta-sigma ADCs targeting space- and power-constrained sensing nodes in electrified powertrains, emissions control, and body electronics.

FAQ

What is the I²C address of the ADS1000A0QDBVRQ1?

The ADS1000A0QDBVRQ1 has a factory-programmed 7-bit I²C address of 1001000b (0x48), indicated by the "A0" suffix in the part number. This variant is marked "BD0" on the package. It supports standard, fast, and high-speed I²C modes up to 3.4 MHz, and requires external pull-up resistors on SDA and SCL lines. The ADS1000A0QDBVRQ1 does not respond to general-call writes except for reset command 00h followed by 06h.

Does the ADS1000A0QDBVRQ1 require an external voltage reference?

No, the ADS1000A0QDBVRQ1 uses a ratiometric architecture where VDD serves as both power supply and reference voltage. Full-scale differential input range is ±VDD/PGA, eliminating need for external reference and inherently compensating for VDD drift. This design simplifies BOM and improves system-level accuracy in automotive environments where supply rails vary with load and temperature.

How does the programmable gain amplifier (PGA) affect input range in the ADS1000A0QDBVRQ1?

The ADS1000A0QDBVRQ1's PGA offers gains of 1, 2, 4, or 8 via configuration register bits PGA[1:0]. With gain = 8, the full-scale differential input range becomes ±VDD/8 - e.g., ±625 mV at VDD = 5 V - enabling high-resolution digitization of low-amplitude sensor signals such as thermopile or electrochemical gas sensor outputs without external amplification stages.

What is the power consumption profile of the ADS1000A0QDBVRQ1 in single-conversion mode?

In single-conversion mode, the ADS1000A0QDBVRQ1 draws 90 μA during active conversion and automatically powers down to 0.05–2 μA in idle state. Conversion time is fixed at ~7.8 ms (1/128 SPS), so average current scales linearly with sampling frequency - e.g., 1.17 μA average at one conversion per second. This behavior makes ADS1000A0QDBVRQ1 ideal for duty-cycled sensor monitoring in automotive sleep modes.

Is the ADS1000A0QDBVRQ1 compatible with other devices in the ADS1000-Q1 family?

Yes, the ADS1000A0QDBVRQ1 shares identical electrical specifications, pinout, register map, and functional behavior with other ADS1000-Q1 variants (e.g., ADS1000A1QDBVRQ1), differing only in factory-set I²C address (1001000b vs. 1001001b) and package marking. Both variants use the same SOT-23-6 DBV package and support identical operating conditions, allowing direct substitution where address conflict avoidance is required.