Texas Instruments ADS1015LIDGSR

Overview

ADS1015LIDGSR from Texas Instruments is a 12-bit, delta-sigma analog-to-digital converter with integrated PGA, digital comparator, internal reference and oscillator, operating from 2.0 V to 3.6 V supply and supporting 1.8-V I²C bus logic levels. It features two differential (or four single-ended) inputs, programmable data rates up to 3.3 kSPS, and operates across –40°C to +125°C for system monitoring in space-constrained industrial sensors.

For engineers reviewing the ADS1015LIDGSR datasheet, ADS1015LIDGSR pinout, ADS1015LIDGSR application, or ADS1015LIDGSR equivalent, key selection criteria include its 12-bit noise-free resolution, ±0.256 V to ±6.144 V PGA-adjustable full-scale range, open-drain ALERT/RDY output for over/under-voltage detection, ultra-small 10-pin VSSOP package, and guaranteed operation at 125°C ambient.

Technical Context

The ADS1015LIDGSR implements a switched-capacitor ΔΣ modulator with 250 kHz effective modulator frequency derived from an internal 1-MHz oscillator. Its input multiplexer supports two differential or four single-ended channels, enabling flexible sensor interface configurations without external signal routing.

It integrates a low-drift voltage reference and programmable gain amplifier (PGA) with six selectable full-scale ranges (±0.256 V to ±6.144 V), allowing precise measurement of both microvolt-level thermistor signals and voltages near the 3.3-V rail. The digital comparator operates in latched or non-latched mode with configurable alert thresholds and sample-averaging (1×, 2×, or 4×).

Key Specifications

Pinout & Package

ADS1015LIDGSR is packaged in a 10-pin VSSOP (DGS) measuring 3.00 mm × 4.9 mm, optimized for automated assembly and thermal performance (R_θJA = 182.7°C/W). Pin functions are validated per TI SBASAV7 (Jan 2024) datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ADC applications.

Compared with ADS1115IRUGR and MCP3424-E/SL, the ADS1015LIDGSR uniquely balances 12-bit precision, 3.3-kSPS throughput, integrated comparator, and ultra-low power in a 10-pin VSSOP - making it optimal for embedded system monitoring where size, autonomy, and wide temperature range are critical.

Availability

ADS1015LIDGSR is available at Aetrix Electronics and suitable for industrial motor control, automotive cabin sensors, and wearable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADS1015LIDGSR 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 delivering analog and embedded processing solutions, with deep expertise in precision data converters and low-power design.

The ADS101xL product line was developed specifically for space- and power-constrained system monitoring applications - integrating PGA, comparator, reference, and oscillator to replace discrete signal chains in industrial, automotive, and portable electronics.

FAQ

What is the maximum sampling rate supported by the ADS1015LIDGSR?

The ADS1015LIDGSR supports a maximum sampling rate of 3.3 kSPS (3300 samples per second), selectable via the DR[2:0] bits in the Configuration register. This rate is achieved using the internal 1-MHz oscillator divided by 4 to yield a 250-kHz modulator clock. At 3.3 kSPS, conversion time is 303 µs, and the device maintains 12-bit noise-free resolution with ±0.5 LSB INL.

Does the ADS1015LIDGSR require an external voltage reference?

No, the ADS1015LIDGSR does not require or support an external voltage reference. It integrates a low-drift internal reference whose errors are fully characterized in the gain error and gain drift specifications. The full-scale range is defined directly by PGA settings (e.g., ±2.048 V), and Table 7-1 in the datasheet provides corresponding LSB sizes - eliminating reference selection, layout, and calibration overhead.

How many analog input channels does the ADS1015LIDGSR support?

The ADS1015LIDGSR supports two differential input channels (AIN0–AIN1 and AIN2–AIN3) or four single-ended channels (AIN0, AIN1, AIN2, AIN3), configured via the MUX[2:0] bits in the Configuration register. Unlike the ADS1014L, the ADS1015LIDGSR includes an internal multiplexer - enabling sequential measurement of multiple sensors without external analog switches or reconfiguration of PCB traces.

Can the ADS1015LIDGSR operate with a 1.8-V I²C bus while powered from 3.3 V?

Yes, the ADS1015LIDGSR supports 1.8-V I²C logic levels independently of VDD, which can range from 2.0 V to 3.6 V. Its digital inputs (SCL, SDA, ADDR, ALERT/RDY) accept VIH ≥ 1.0 V and VIL ≤ 0.25 V, ensuring reliable communication with 1.8-V microcontrollers such as the STM32L4 series or Silicon Labs EFM32 without level-shifting circuitry - reducing component count and signal integrity risk.

What is the function of the ALERT/RDY pin on the ADS1015LIDGSR?

The ALERT/RDY pin on the ADS1015LIDGSR serves dual functions: it acts as a comparator output (asserted when conversion data exceed programmed thresholds) or as a conversion-ready indicator (pulsed low for ~8 µs at end of each conversion). Configured via COMP_MODE, COMP_LAT, and COMP_POL bits, it supports latched/non-latched, window/traditional, and active-high/active-low modes - enabling autonomous fault detection and synchronization without continuous I²C polling.