Texas Instruments ADS1000A0IDBVRG4

Overview

ADS1000A0IDBVRG4 from Texas Instruments is a 12-bit, I²C-compatible analog-to-digital converter with differential inputs, programmable gain amplifier (PGA = 1/2/4/8), 128 SPS data rate, and ratiometric operation using VDD as reference. It operates from 2.7V to 5.5V and draws only 90 µA active current, targeting space- and power-constrained voltage monitoring and portable instrumentation.

For engineers reviewing the ADS1000A0IDBVRG4 datasheet, ADS1000A0IDBVRG4 pinout, ADS1000A0IDBVRG4 application, or ADS1000A0IDBVRG4 equivalent, key selection considerations include its SOT-23-6 package, fixed I²C address 0x48 (1001000b), single-cycle conversion architecture, PGA-configurable input range, and compatibility with standard/fast/high-speed I²C buses up to 3.4 MHz.

Technical Context

The ADS1000A0IDBVRG4 implements a switched-capacitor SAR ADC core with an integrated clock generator (no external clock required) and fully differential input stage. Its ratiometric conversion uses VDD as both supply and reference, eliminating need for external precision references.

It supports two operating modes-continuous conversion (ST/BSY always reads '1') and single conversion (ST/BSY toggles to initiate and indicate completion)-and features binary two's complement output coding with right-justified, sign-extended 12-bit data in a 16-bit register format.

Key Specifications

Pinout & Package

SOT-23-6 package with 1.6 mm × 2.9 mm footprint and 0.95 mm height; compatible with standard reflow profiles and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit I²C ADC applications.

Compared with ADS1000A0IDBVRG4, ADS1100A0IDBVR trades 4 extra bits of resolution for ~2.8× higher supply current and identical pinout, while MCP3421A0T-E/CH offers programmable resolution and deeper PGA range at the cost of slower maximum throughput and different internal architecture.

Availability

ADS1000A0IDBVRG4 is available at Aetrix Electronics and suitable for battery management, industrial process control, and consumer goods requiring stable component supply with guaranteed long-term sourcing and TI-authorized traceability.

Supply support for ADS1000A0IDBVRG4 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 expertise in precision data acquisition ICs.

The ADS1000 series was designed specifically for ultra-compact, low-power systems needing integrated 12-bit ADC functionality with minimal external components-targeting portable instrumentation, energy harvesting nodes, and space-constrained industrial sensors.

FAQ

What is the I²C address of the ADS1000A0IDBVRG4?

The ADS1000A0IDBVRG4 has a factory-programmed fixed 7-bit I²C slave address of 0x48 (binary 1001000). This distinguishes it from the ADS1000A1 variant (0x49) and enables dual-device configurations on a shared bus without address collision. The address is hardwired and not software-configurable.

Does the ADS1000A0IDBVRG4 require an external reference voltage?

No, the ADS1000A0IDBVRG4 uses its VDD supply rail as the reference voltage for ratiometric conversion, eliminating the need for an external precision reference. This design simplifies BOM, reduces board area, and inherently rejects supply ripple-making the ADS1000A0IDBVRG4 ideal for battery-powered systems where VDD may vary.

How does the programmable gain amplifier (PGA) affect input range in the ADS1000A0IDBVRG4?

In the ADS1000A0IDBVRG4, the PGA gain setting directly scales the full-scale differential input voltage: ±VDD/PGA. For example, at VDD = 3.3 V and PGA = 8, the usable input range is ±412.5 mV. This allows small-signal sources (e.g., 50 mV shunt drops) to occupy the full 12-bit code range, maximizing SNR without external amplification.

Can the ADS1000A0IDBVRG4 operate in high-speed I²C mode?

Yes, the ADS1000A0IDBVRG4 is fully compatible with high-speed I²C mode (up to 3.4 MHz), in addition to standard (100 kHz) and fast (400 kHz) modes. It automatically enables high-speed filters upon receiving the Hs master code (00001XXX) and reverts to normal mode after a STOP condition-enabling faster register reads in time-critical applications.

What happens to the ADS1000A0IDBVRG4 output register after power-up or reset?

After power-up or General Call Reset, the ADS1000A0IDBVRG4 clears its 16-bit output register to 0x0000. The register remains zero until the first conversion completes. Therefore, any read immediately post-reset returns null data; firmware must wait for ST/BSY bit assertion (in single mode) or allow one full conversion cycle before reading valid results from the ADS1000A0IDBVRG4.