ADS1213E

Overview

The ADS1213E is a precision, low-power, 16-bit analog-to-digital converter (ADC) manufactured by Burr-Brown. It integrates a programmable gain amplifier (PGA), a precision internal reference, and an on-chip oscillator to minimize external component count. The device utilizes a delta-sigma architecture with a serial interface compatible with standard microcontrollers. Key electrical specifications include a programmable gain range from 1 to 128, a data rate selectable between 10 sps and 660 sps, and a typical noise level of 50 nV RMS at 10 sps with a gain of 128. It operates from a single supply voltage ranging from 2.7V to 5.5V.

Feature Summary

• Integrated 16-bit delta-sigma ADC with programmable gain amplifier (PGA) offering gains of 1, 2, 4, 8, 16, 32, 64, and 128.
• On-chip precision voltage reference and oscillator reduce system cost and board space.
• Serial interface compatible with SPI and QSPI standards for easy microcontroller integration.
• Low power consumption: 3.5 mA at 5V, dropping to 1.5 mA in power-down mode.

Applications

• Battery-powered portable instrumentation due to low current draw.
• Industrial process control systems requiring high accuracy and noise rejection.
• Weight scales and load cell interfaces utilizing the PGA for small signal amplification.
• Medical equipment such as ECG and blood pressure monitors.

Procurement Notes

Verify the suffix 'E' indicates the commercial temperature range (-40°C to +85°C). Confirm package type, typically SOIC-16 or TSSOP-16, against specific design requirements. Check for obsolescence status as Burr-Brown products may be legacy items under Texas Instruments portfolios. Ensure compatibility with existing PCB footprints if replacing older components.

Selection Notes

Select the ADS1213E when a 16-bit resolution and high input impedance are required for differential signals. Compare data rates: use 10 sps for maximum noise rejection in static measurements, or 660 sps for faster response. Verify that the internal reference meets the application's accuracy needs; otherwise, consider external reference variants. Ensure the supply voltage matches the system rail, as the device supports both 3V and 5V logic levels.

Part Context

The ADS1213 belongs to the ADS121x family of precision ADCs from Burr-Brown, now part of Texas Instruments. It is designed as a drop-in replacement for older 16-bit ADCs in industrial applications. The 'E' suffix denotes the extended commercial temperature range. This component bridges the gap between general-purpose ADCs and high-precision laboratory instruments.

Replacement Considerations

Direct pin-compatible replacements within the same family include the ADS1212 and ADS1214, which differ in channel count or feature sets. For legacy sourcing, verify if the ADS1213IR or ADS1213IP are available equivalents. Cross-reference with Texas Instruments' current portfolio for updated packaging or environmental compliance information.