Texas Instruments ADS1244IDGSRG4

Overview

ADS1244IDGSRG4 from Texas Instruments is a 24-bit delta-sigma analog-to-digital converter in MSOP-10 package, featuring ±5V differential input range, 15 sps data rate, simultaneous 50Hz/60Hz rejection, single-cycle settling, and sleep mode consuming <1µW. It targets high-resolution portable instrumentation requiring low power and space-constrained PCB layouts.

For engineers reviewing the ADS1244IDGSRG4 datasheet, ADS1244IDGSRG4 pinout, ADS1244IDGSRG4 application, or ADS1244IDGSRG4 equivalent, key selection criteria include its 24-bit resolution with 0.0008% max INL, dual-supply flexibility (2.5–5.25V AVDD / 1.8–3.6V DVDD), 2-wire serial interface timing, and multichannel synchronization capability for industrial sensor systems.

Technical Context

The ADS1244IDGSRG4 implements a 3rd-order delta-sigma modulator followed by a digital filter that provides fixed 15 sps output with notch rejection at both 50Hz and 60Hz. Its analog front-end uses switched-capacitor sampling with effective input impedance of 13 MΩ (AINP/AINN) and 6.5 MΩ (differential path) at 2.4576 MHz CLK.

It supports self-calibration triggered via SCLK waveform, single-conversion operation using Sleep Mode entry/exit sequencing, and synchronous multichannel operation when multiple devices share CLK and SCLK. The DRDY/DOUT pin serves dual function: status indicator (active-low) and 24-bit MSB-first serial data output.

Key Specifications

Pinout & Package

ADS1244IDGSRG4 is housed in a 10-pin MSOP package (3.0 mm × 3.0 mm × 1.0 mm height) with exposed thermal pad (DGS suffix). Pin mapping is validated per TI SBAS273 datasheet Figure "PIN CONFIGURATION" and "PIN DESCRIPTIONS".

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution, low-power delta-sigma ADC applications.

Compared with ADS1247IPW and AD7792BRUZ, the ADS1244IDGSRG4 uniquely combines 2-wire simplicity, sub-µW sleep, and fixed 50/60 Hz rejection in a 10-pin MSOP - making it irreplaceable for space- and energy-constrained single-channel measurement nodes.

Availability

ADS1244IDGSRG4 is available at Aetrix Electronics and suitable for hand-held instrumentation, portable medical equipment, and industrial process control requiring stable component supply across long product lifecycles.

Supply support for ADS1244IDGSRG4 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, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The ADS1244IDGSRG4 belongs to TI's precision delta-sigma ADC product line, engineered specifically for ultra-low-power, high-resolution measurement in portable and battery-operated systems.

FAQ

What is the maximum clock frequency supported by ADS1244IDGSRG4?

The ADS1244IDGSRG4 supports a CLK input frequency up to 6 MHz per Absolute Maximum Ratings. However, the recommended operating frequency is 2.4576 MHz to ensure 15 sps data rate and precise 50/60 Hz rejection. At higher frequencies, the rejection notches shift proportionally (e.g., 4.9152 MHz moves notches to 100/120 Hz), and settling behavior remains single-cycle but timing parameters scale accordingly.

Does ADS1244IDGSRG4 require external calibration components?

No, the ADS1244IDGSRG4 performs full self-calibration internally without external components. Power-up calibration occurs automatically when AVDD and DVDD stabilize; user-initiated calibration is triggered via a defined SCLK waveform (26th falling edge after data read). Both offset and gain errors are corrected using on-chip capacitor arrays and digital trimming.

Can ADS1244IDGSRG4 operate from a single 3.3V supply?

Yes, the ADS1244IDGSRG4 supports single-supply operation: connect AVDD and DVDD together at 3.3 V. This satisfies both analog (2.5–5.25 V) and digital (1.8–3.6 V) supply ranges. Ensure proper 0.1 µF bypass capacitors on each supply pin and verify DRDY/DOUT logic levels match host MCU voltage thresholds.

How does the ADS1244IDGSRG4 achieve simultaneous 50Hz and 60Hz rejection?

The ADS1244IDGSRG4 achieves simultaneous 50Hz and 60Hz rejection through its fixed-coefficient digital filter architecture, which places deep notches exactly at both frequencies when driven by a 2.4576 MHz system clock. This is a deterministic property of the filter's transfer function-not software-configurable-and requires no external components or firmware intervention.

What is the meaning of "single-cycle settling" for ADS1244IDGSRG4?

"Single-cycle settling" means the ADS1244IDGSRG4 produces a fully settled, accurate 24-bit output after exactly one conversion interval (66.7 ms at 15 sps). There is no need to discard initial readings or perform multiple conversions before data is valid-enabling immediate use of every sample in time-critical or low-duty-cycle applications.