Texas Instruments ADS1130IPWR

Overview

ADS1130IPWR from Texas Instruments is a precision 18-bit delta-sigma analog-to-digital converter with integrated 64× low-noise gain amplifier, internal oscillator, and sinc4 digital filter-designed specifically for bridge sensor front-ends in weigh scales and strain gauge systems. It delivers 18-bit noise-free resolution, ±39mV full-scale differential input range, simultaneous 50Hz/60Hz rejection at 10SPS, and operates from 2.7V to 5.3V supplies.

For engineers reviewing the ADS1130IPWR datasheet, ADS1130IPWR pinout, ADS1130IPWR application, or ADS1130IPWR equivalent, this page provides verified technical context, real-world design meaning of key specs, TSSOP-16 pin mapping, bridge-sensor-specific feature value, validated alternative options, and supply support for industrial weighing and precision measurement designs.

Technical Context

The ADS1130IPWR implements a third-order delta-sigma modulator with fourth-order sinc4 digital filtering, enabling 90dB normal-mode rejection at 50/60Hz when configured for 10SPS. Its chopper-stabilized gain amplifier uses matched resistors (R1, RF1, RF2) to deliver fixed 64× gain with ±1% gain error and ±5ppm/°C drift.

Control is fully pin-driven: SPEED selects between 10SPS (full-line-rejection mode) and 80SPS (higher-speed mode); PDWN forces complete power-down with reset; SCLK initiates standby mode when held high after DRDY/DOUT assertion and clocks out 18-bit two's complement data MSB-first on rising edges.

Key Specifications

Pinout & Package

TSSOP-16 package (PW), 5.0mm × 4.4mm × 1.2mm body height, RoHS-compliant NiPdAu lead finish, MSL Level-2-260°C-1 year.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS1130IPWR, ADS1230IPWR offers higher resolution but removes the internal oscillator benefit, while AD7793BRUZ trades pin simplicity and compact size for configurability and on-chip features-making ADS1130IPWR optimal for cost-sensitive, space-constrained bridge sensor nodes requiring zero-configuration operation.

Availability

ADS1130IPWR is available at Aetrix Electronics and suitable for weigh scale manufacturing, strain gauge instrumentation, and industrial load cell interface designs requiring stable component supply, long-lifecycle assurance, and RoHS-compliant TSSOP packaging.

Supply support for ADS1130IPWR 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 and embedded processing technologies, with decades of expertise in precision data acquisition and sensor interface solutions.

The ADS1130IPWR belongs to TI's precision delta-sigma ADC product line, engineered specifically for low-noise, low-power bridge sensor signal conditioning in industrial weighing, structural monitoring, and process control applications.

FAQ

What is the maximum external reference voltage supported by the ADS1130IPWR?

The ADS1130IPWR supports an external voltage reference up to 5V applied differentially between REFP and REFN (V_REF = REFP – REFN). The absolute voltage on each reference pin must remain within AGND – 0.1V and AVDD + 0.1V to prevent ESD diode conduction. This ratiometric capability ensures measurement accuracy remains stable even with supply rail variation, a key requirement in the ADS1130IPWR's target bridge sensor applications.

Does the ADS1130IPWR require external clocking or does it include an internal oscillator?

The ADS1130IPWR includes a fully integrated, low-drift internal oscillator-no external crystal or clock source is required. This eliminates BOM cost and PCB area typically needed for timing components and simplifies layout. The internal oscillator enables precise 10SPS and 80SPS data rates with guaranteed 50Hz/60Hz rejection, making the ADS1130IPWR uniquely suited for standalone bridge sensor front-ends where minimal external components are critical.

How does the ADS1130IPWR achieve simultaneous 50Hz and 60Hz line-frequency rejection?

The ADS1130IPWR achieves simultaneous 50Hz and 60Hz rejection through its fourth-order sinc4 digital filter synchronized to a 76.8kHz modulator clock. At the 10SPS data rate, the filter's notch response places deep nulls exactly at both 50Hz and 60Hz-enabling single-hardware deployment across global markets. This behavior is intrinsic to the ADS1130IPWR's fixed filter architecture and requires no configuration, unlike programmable filters that demand firmware tuning.

What is the function of the CAP pins on the ADS1130IPWR?

The CAP pins (5 and 6) on the ADS1130IPWR connect to an external 0.1μF bypass capacitor that stabilizes the internal 64× gain amplifier. This capacitor is essential for achieving specified low-drift performance (±10nV/°C offset drift) and noise floor (300nVPP at 10SPS). Using a high-quality C0G/NP0 ceramic capacitor placed close to the CAP pins minimizes parasitic inductance and ensures the ADS1130IPWR maintains its precision specifications in real-world PCB layouts.

Can the ADS1130IPWR operate from a single 3.3V supply?

Yes, the ADS1130IPWR operates from a single 3.3V supply across both AVDD and DVDD rails, meeting its 2.7V–5.3V specification. At 3.3V, analog supply current is 900–1500μA and digital supply current is 60–100μA, resulting in ~2.9mW total power dissipation. This makes the ADS1130IPWR compatible with modern low-voltage industrial microcontrollers and battery-powered portable weighing devices without level-shifting or dual-rail generation.